JP2011179391A - Oil feeding pump for oil heater - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide an oil feeding pump preventing dripping of kerosene when an oil filling pipe is pulled out of a tank, after feeding the kerosene to the oil heater. <P>SOLUTION: The oil feeding pump includes: a body 1 having a pump; a suction pipe 2 inserted into the large tank containing the kerosene 17, and sucking up the kerosene; and an oil filling hose 3 introducing the kerosene to the tank of the oil heater. The oil filling hose 3 extends upward from an outlet 6 disposed to a lower side of a body side part to constitute a top part 11, and extends from the top part 11 to a tip outlet, and a small air hole 9 is formed in the vicinity of the top part. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an oil supply pump used when kerosene is put into a tank of an oil stove.

  The oil stove is equipped with a tank that holds kerosene as fuel. The tank may be integrated with the oil stove or may be structured to be separable from the oil stove body, but kerosene must be supplied to the tank in any form. By the way, when kerosene is put into the tank, an oil supply pump is generally used.

  By the way, various types of oil pumps are known, and kerosene contained in a large plastic tank can be transferred to a tank of an oil stove using the principle of siphon. Of course, recently, a pump that is operated by a motor without using the principle of siphon, or an oil supply pump provided with a pump that is manually operated is also used in part.

  When these oil pumps have finished refueling, when the oil pump is pulled up from the tank of the oil stove, kerosene will flow down from the oil hose, so that the dripping of kerosene has been stopped and it must be stored in the pump housing. Must not. Conventionally, various oil supply pumps that prevent dripping of kerosene from an oil supply hose after refueling are also known.

The "oil supply pump" according to Japanese Patent Application Laid-Open No. 8-144940 quickly terminates the dripping of oil adhering from the lower end of the pipe when the oil pump finishes supplying kerosene to the oil stove. It can be stored in a container.
Therefore, in the oil supply pump, an attached oil reservoir container having an attachment member with an overflow hole formed in the oil supply port at the lower end of the oil supply pipe is connected and fixed. And by attaching the siphon of an inverted U-shaped rod-shaped hollow body to the bottom plate of the adhered oil reservoir container, one end thereof is opened inside the adhered oil reservoir container, and the other end is exposed to the outside of the adhered oil reservoir container. .

The “oil supply pump” according to Japanese Patent Application Laid-Open No. 2001-12341 is one in which kerosene discharged in a state where refueling is completed and remaining in the hose is prevented from dripping down.
Therefore, a residual oil squeezing tool is attached to the tip of the discharge hose, and this residual oil squeezing tool has a pipe through which the discharge hose fits and a hole penetrating in the axial direction in the case that slides along the pipe. A cylindrical sponge is accommodated, and a coil spring is provided so that the spring force is urged so that the slider descends.

The “oil supply pump storage box” according to Japanese Patent Laid-Open No. 10-30560 prevents the floor side from being contaminated by oil droplets dripping after supplying kerosene to a domestic oil stove, and provides a storage place for the oil pump. This is an oil pump storage box that can be secured.
"Oil supply pump" according to Japanese Patent Application Laid-Open No. 8-144940 “Oil pump” according to Japanese Patent Application Laid-Open No. 2001-12341 "Oil supply pump storage box" according to Japanese Patent Laid-Open No. 10-30560

  Thus, when kerosene is supplied to a tank of an oil stove with an oil supply pump, various techniques for preventing dripping of kerosene generated when the oil supply hose is pulled up after oil supply are known. However, the structure is complicated, such as attaching an oil reservoir and a residual oil squeezing tool to the end of the oil hose, and the production cost of the oil pump increases. The problem to be solved by the present invention is this problem, and provides an oil supply pump capable of preventing dripping of kerosene after refueling with an extremely simple structure.

  The oil supply pump according to the present invention has a main body at the upper end of the suction pipe, and an oil supply hose extends from the main body. The basic form and structure is the same as that of a conventional oil supply pump. The main body is provided with a pump, and when the pump is operated, the oil is sucked up through the suction pipe from the kerosene plastic tank, and the oil is supplied from the oil supply hose. It flows into the tank of the stove and is refueled. Here, the oil supply pump is provided with a pump that is operated by using a motor as a power source or manually operated.

  And the latching tool is provided in the side part of a main body, and the oil supply hose is latched by this latching tool. The locking tool is provided above the position where the oil supply hose is attached, and the oil supply hose is bellows and can be freely curved. Therefore, the bellows type oil supply hose locked to the locking tool has a substantially inverted U shape and has a top portion. The refueling hose is provided with a small air hole. Moreover, an air hole may be provided in the vicinity (base part) of the attachment part of the oil supply hose. On the other hand, the oil supply hose can be configured to be connected to an oil supply pipe attached to the main body.

  In the oil supply pump according to the present invention, kerosene does not drip from the tip outlet even if the oil supply hose is pulled up after supplying kerosene to the tank of the oil stove. That is, the refueling hose is roughly inverted U-shaped to form the top, and if refueling is stopped, air will enter from the air hole formed in the middle, so that the oil will run out and kerosene will not drip from the end outlet. . The air hole formed in the oil supply hose is provided with, for example, a recess in a part of the oil supply hose and is formed in the bottom of the recess so that kerosene does not leak from the air hole during oil supply. It is also possible to form an air hole by attaching a screw to a part of the oil supply hose and loosening the screw.

The oil stove oil pump according to the present invention. The oil stove oil pump according to the present invention. The example of the air hole formed in the oil supply pipe. (A) When the air vent cap for opening and closing the air hole is attached, (b) When the air vent screw for opening and closing the air hole is attached. The oil stove oil pump according to the present invention.

  FIG. 1 is an embodiment showing an oil supply pump according to the present invention. In the figure, 1 denotes a main body, 2 denotes a suction pipe, and 3 denotes an oil supply hose. The suction pipe 2 extends downward from the main body 1, and a filter 4 is attached to the lower end of the suction pipe 2. The oil supply hose 3 is connected to a port provided on the lower side of the main body 1 and is bevelled so that it can be bent.

  Therefore, the kerosene sucked up by the suction pipe 2 through the filter 4 flows out from the oil supply hose 3 and is put into a tank of an oil stove. The oil supply pump shown in the figure is an electric type, and the main body 1 includes a motor and a pump, and the pump can be operated by the motor. If the suction pipe 2 is inserted into the plastic tank and the switch 5 provided in the main body 1 is turned on, the motor is activated and the kerosene is sucked up by the pump.

  On the other hand, the oil supply hose 3 is connected to an outlet 6 provided on the side portion of the main body 1 and a sensor 7 is attached to the tip, and the tank stops at a predetermined level so that the kerosene that has entered does not overflow. A locking tool 8 is attached to the upper side of the main body 1, and the locking tool 8 is generally U-shaped. The bellows type oil supply hose 3 is fitted into the locking tool 8 and locked. Is done. FIG. 1 shows a state in which the oil supply hose 3 is supported by being locked to the locking tool 8.

  Accordingly, the bellows-type bendable refueling hose 3 extends upward from the outlet 6, is latched by the locking tool 8, and hangs downward. In the middle of the oil supply hose 3, a small hole penetrates in the vicinity of the top 11 that is curved while being engaged with the engagement tool 8. This hole is an air hole 9, and the motor is turned off to stop the flow of kerosene. At the same time, the outside air can enter from the air hole 9, and the kerosene in the oil supply hose 3 returns to the main body side, and the tip It flows out from the exit 10.

  By the way, the usage of the oil supply pump is the same as in the conventional case, and the suction pipe 2 is inserted into a plastic tank and the oil supply hose 3 is inserted into a tank of an oil stove. If the switch 5 is turned on, the pump built in the main body 1 operates to suck up the kerosene in the poly tank and guide it to the oil supply hose 3 to supply the kerosene to the oil stove tank. When the oil stove tank is filled with kerosene and the switch 5 is turned off, the motor stops.

  When the motor is turned off, the pump is stopped and the flow of kerosene is eliminated. However, in the case of a conventional oil pump, kerosene remains in the main body 1, the suction pipe 2, and the oil hose 3, and if the oil hose 3 is pulled up from the oil stove tank as it is, the oil hose 3 The remaining kerosene spills from the tip outlet 10. Therefore, in the present invention, the oil supply hose 3 is locked to the locking tool 8 so that the kerosene flowing out from the outlet 6 of the main body 1 is once pushed upward and then flows out from the outlet 10 again.

  In this way, if the oil supply hose 3 is bent and raised and then supplied from the outlet 10 to the tank of the oil stove, the kerosene remaining in the oil supply hose 3 on the main body side from the top 11 at the same time when the switch 5 is turned OFF. Flows back to the main body 1 and flows down the suction pipe 2 to be returned to the plastic tank. Further, kerosene remaining in the oil supply hose 3 on the tip side from the top 11 flows down to the tank of the oil stove. Therefore, the oil supply hose 3 is in an empty state, and kerosene does not spill from the tip outlet 10 when being pulled up from the tank.

  The reason that the kerosene remaining in the oil supply hose 3 flows down and becomes empty is that air enters from the air hole 9 provided in the oil supply hose 3. In the state where it is only locked, a part of the kerosene remaining in the oil supply hose 3 may fall from the tip outlet 10. Here, the form of the locking tool 8 is arbitrary, and the top 11 may be formed by lifting the oil supply hose 3 halfway.

  Therefore, the outlet 6 to the top 11 of the oil supply hose 3 can be formed by a rigid tube extending along the side of the main body 1 instead of the bellows type. FIG. 2 shows a case where the rigid oil supply pipe 12 is provided along the main body 1, and the outlet 6 is provided on the lower side of the main body as in the case of FIG. The bellows type oil supply hose 3 is connected to the upper end of the rigid oil supply pipe 12, and the air hole 9 is formed in the upper connecting pipe 13. That is, the upper connecting pipe 13 becomes the top 11 of the oil supply hose 3, and the residual kerosene is discharged from the rigid oil supply pipe 12 and the bellows type oil supply hose 3 when the switch 5 is turned OFF.

  By the way, the air hole 9 is small and the kerosene flowing through the oil supply hose 3 should not leak. However, the air can enter. FIG. 3 shows an enlarged view of a portion where the air hole 9 is formed. Thus, the air hole 9 is not the surface 14 of the oil supply hose 3 but the surface 14 is provided with the recess 15, and the air hole 9 is formed in the recess bottom 16.

  If the motor starts and the pump operates, the kerosene 17 flows through the oil supply hose 3, but the kerosene 17 does not leak from the small air holes 9 formed in the recess bottom 16. The kerosene 17 flowing through the oil supply hose 3 hits the recess 15, and the flow rate of the kerosene 17 flowing toward the recess bottom 16 becomes relatively high, and as a result, the pressure decreases. Furthermore, leakage of kerosene 17 from the small air hole 9 is prevented by the surface tension acting.

  Then, if the switch 5 is turned OFF and the motor and the pump are stopped, air enters from the air hole 9 and the kerosene 17 of the oil supply hose 3 is removed. That is, the kerosene 17 on the outlet side from the top 11 flows into the tank of the oil stove, and the kerosene 17 on the main body side from the top 11 flows back to the plastic tank.

  By the way, the form of the air hole 9 provided in the top part 11 vicinity of the oil supply hose 3 is not limited to the case shown in FIG. As the air hole, a structure may be adopted in which a mesh penetrating a very small hole through which kerosene does not pass but air penetrates is stuck in a hole provided in the oil supply hose. FIG. 4A shows another embodiment in which an air hole 9 is formed in the middle of the oil supply hose 3. The oil supply hose 3 is provided with a screw portion 19, and an air vent cap 18 is screwed into the screw portion 19. It shows the case of installation. Therefore, when the refueling is completed, the air vent cap 18 is loosened, so that air enters the refueling hose 3 from the air hole 9 formed in the screw portion 19.

  FIG. 4B shows another embodiment in which an air hole 9 is formed in the middle of the oil supply hose 3. The oil supply hose 3 is provided with a cylinder portion 20, and an air vent screw is provided in a screw hole of the cylinder portion 20. The case where 21 is screwed and attached is shown. Therefore, when the refueling is completed, the air vent screw 21 is loosened, whereby air enters the refueling hose 3 from the air hole 9 formed in the cylindrical portion 20.

  FIG. 5 shows another embodiment of the oil supply pump according to the present invention, in which an air hole is formed in the base portion 22 of the oil supply hose 3. The air hole 9 is provided on the upper side of the oil supply hose 3, so that the kerosene 17 being supplied leaks as in the case where the air hole 9 is provided in the top 11 of the oil supply hose 3 shown in the oil supply pump of FIG. There is nothing. Of course, as shown in FIG. 4, it is free to attach an air vent cap 18 or an air vent screw 21 that opens and closes the air hole 9.

DESCRIPTION OF SYMBOLS 1 Main body 2 Suction pipe 3 Oil supply pipe 4 Filter 5 Switch 6 Outlet 7 Sensor 8 Locking tool 9 Air hole
10 Exit
11 Top
12 Rigid oil supply pipe
13 Upper connecting pipe
14 Surface
15 recess
16 Recess bottom
17 Kerosene
18 Air vent cap
19 Screw part
20 Tube
21 Air release screw
22 Base

Claims (7)

In the oil pump used when kerosene is put into an oil stove, the oil pump is inserted into a main body provided with a pump, a large plastic tank or the like containing kerosene, and a suction pipe for sucking up the kerosene, and an oil stove It is composed of an oil supply hose that guides kerosene to the tank. The oil supply hose extends upward from an outlet provided on the lower side of the main body to provide a top, extends from the top to the tip outlet, and is small near the top. An oil stove refueling pump characterized by the formation of air holes. The oil pump for an oil stove according to claim 1, wherein the whole oil supply hose is configured as a bellows type bendable hose, and the bellows type oil supply hose is fitted and locked to a locking tool attached on the upper side of the main body. The above-mentioned oil supply hose is composed of a rigid oil supply pipe and a bellows type oil supply hose extending upward along the side of the main body, an upper connection pipe is provided at the upper end of the rigid oil supply pipe, and a bellows type oil supply hose is connected to this upper connection pipe Item 2. An oil stove oil pump according to Item 1. In the oil pump used when kerosene is put into an oil stove, the oil pump is inserted into a main body provided with a pump, a large plastic tank or the like containing kerosene, and a suction pipe for sucking up the kerosene, and an oil stove It is composed of bellows type oil supply hose that leads kerosene to the tank, and the oil supply hose extends from the outlet provided on the lower side of the main body to the tip, and a small air hole is formed at the base of the oil supply hose. A featured oil stove refueling pump. The oil pump for an oil stove according to claim 1, 2, 3, or 4, wherein the air hole is formed in a bottom of a recess provided on a surface of the oil hose. The oil pump for an oil stove according to claim 1, 2, 3, or 4, wherein the air hole is attached to an air vent cap or an air vent screw so as to be opened and closed. The said air hole stuck in the hole provided in the oil supply hose by sticking the mesh which penetrated the very small hole which kerosene does not pass but air penetrates, or, or The oil pump of the oil stove according to claim 4.

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