JP4402210B2 - Kerosene oil supply pump - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a tank-fixed kerosene oil supply pump.
[0002]
[Prior art]
FIG. 7 shows a conventional oil pump for kerosene of this type. Here, an electric kerosene oil supply pump is shown.
[0003]
In FIG. 7, reference numeral 71 denotes a suction pipe having an electric pump main body 72 attached to the tip, 73 denotes a discharge hose having a liquid level sensor 74 attached to the tip 73a, 75 denotes a battery housed in a battery case 76, 77 Is a pump on / off switch provided on the upper surface of the battery case 76, and 78 is a cap. In addition, PT is a plastic tank in which kerosene is stored, PTa is an oil supply port, and HDR is a hose tip / drain receiver.
[0004]
In the illustrated oil supply pump, oil supply to a cartridge tank such as a kerosene fan heater (not illustrated) is performed as follows.
[0005]
First, the suction pipe 71 is inserted into the polytank PT from the fuel filler port PTa, and the cap 78 is fastened and fixed to the state shown in the drawing, and the discharge hose tip 73a is inserted into the oil filler port of the cartridge tank (not shown).
[0006]
When the switch 77 is turned on in this state, the pump body 72 is supplied with DC power from the battery 75 and sucks up the kerosene in the polytank PT. The sucked kerosene is supplied into the cartridge tank through the suction pipe 71 and the discharge hose 73. When the kerosene reaches the vicinity of the oil filling port (not shown) of the cartridge tank, the liquid level sensor 74 detects it and turns off the pump main body 72 to end the refueling.
[0007]
When refueling is finished, the discharge hose tip 73a is pinched and the tip 73a is inserted into the hose tip / drain receiver HDR while the discharge hose 73 is curved as shown by a two-dot chain line. A part of the residual oil in the discharge hose 73 is returned to the polytank PT when the discharge hose 73 is bent, and the rest is discharged into the hose tip / drain receiver HDR.
[0008]
[Problems to be solved by the invention]
The conventional oil pump configured as described above has the following problems. That is, no consideration is given to the treatment of residual oil in the discharge hose 73 after refueling, and the oil shortage is poor. For this reason, after refueling, the residual oil in the discharge hose 73 spills around the polytank PT, causing a kerosene odor diffusion, occurrence of dirt, a risk of ignition, and the like.
[0009]
Therefore, the hose tip / drain receiver HDR is attached to the polytank PT so that the residual oil in the discharge hose 73 is received by the hose tip / drain receiver HDR, but the received residual oil is vaporized and the kerosene odor diffuses. In addition, there is an unavoidable danger of ignition, and it is also necessary to periodically perform waste oil treatment in the hose tip / drain receiver HDR. Furthermore, since the inside of the polytank PT communicates with the outside through the suction pipe 71 and the discharge hose 73, there is a problem that the kerosene odor leaks into the room.
[0010]
Therefore, a kerosene oil supply pump as shown in FIG. In FIG. 8, 82 is a manual pump body, 88 is a cap that supports the entire oil pump via the suction pipe 71, and 88 a is a hose tip receiving port formed in the cap 88. In FIG. 8, the same reference numerals as those in FIG. 7 denote the same or corresponding parts. Here, the cap 88 provided with the hose tip receiving port 88a is fitted into the plastic tank filler port PTa.
[0011]
According to this oil pump, after refueling, the discharge hose tip 73a is pinched and inserted into the hose tip receiving port 88a, so that the residual oil in the discharge hose 73 returns to the poly tank PT, and the hose tip receiving port 88a is connected to the discharge hose. Since the end portion 73a is blocked, there is no danger of the kerosene odor spreading and ignition, and the problem of the waste oil treatment work in the hose end / drain receiver HDR is also solved.
[0012]
However, this kerosene oil supply pump has a problem that the kerosene odor diffuses from the open end 88a of the hose during refueling. There is also a problem in that kerosene spills from the receiving port 88a due to the inclination or overturning of the poly tank PT during refueling.
[0013]
Furthermore, the diameter of the cap 88 must be increased because the suction pipe 71 insertion portion and the hose tip receiving port 88a portion must be formed on the plane of the cap 88. For this reason, the fuel filler port PTa has a large diameter, and there is a problem that it cannot be applied to a general-purpose polytank PT having a fuel filler port PTa roughly divided into two or three kinds of diameters.
[0014]
The object of the present invention is to prevent kerosene from being vaporized and released into the outside air, even when not in use or during refueling, and therefore there is no danger of kerosene odor diffusion and ignition, and the inclination of the tank during refueling Another object of the present invention is to provide a kerosene oil supply pump that can be applied to a general-purpose tank without kerosene spillage due to overturning or the like, and without the need for an oil discharge treatment after refueling.
[0015]
[Means for Solving the Problems]
In order to achieve the above object, a kerosene oil supply pump according to claim 1 is directed to the outside of a pump via a discharge tubular body that communicates kerosene sucked into a suction pipe by operation of the pump body. In the oil pump for kerosene to be discharged,
A cap that closes the oil supply port and fixes the suction tube to the tank and closes the oil supply port by tightening and fixing to the oil supply port of the tank with the suction tube inserted into the tank in which kerosene is stored; The nozzle receiving portion is located above the communicating portion with the discharge tubular body, and the tip end portion of the discharge tubular body is detachable from above, and is opened when the tip end is mounted on the nozzle receiving portion. And a drain / air port structure having a valve structure that allows the suction pipe and the tip portion to communicate with each other and closes when the suction pipe is detached.
[0016]
The kerosene oil supply pump according to claim 2 further includes an electric pump main body, and a battery case that houses a battery that serves as a power source for the electric pump is integrally provided above the distal end of the discharge tubular body. It is characterized by that.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings.
[0018]
1 and 2 are partially cut side views showing an embodiment of a kerosene oil pump according to the present invention. FIG. 1 shows a non-use state, and FIG. 2 shows a use state (oil supply state). Show.
[0019]
1 and 2, 11 is a suction pipe having an electric pump main body 12 attached to the tip, 13 is a discharge hose constituting a discharge tubular body communicating with the suction pipe 11, and 13a similarly constitutes a discharge tubular body. An oil supply nozzle connected to the tip of the discharge hose 13, 15 is a battery, 16 is a battery case serving as a grip for storing the battery 15, and 18 is a cap.
[0020]
Here, the suction pipe 11 has a sleeve pipe 11a in the upper part, and has a double structure with the sleeve pipe 11a. The axial length of the suction pipe 11 is a depth dimension of a tank in which kerosene is stored, here, a poly tank PT. It can be adjusted according to 11b is an O-ring provided between the suction pipe 11 and the sleeve pipe 11a. The upper portion of the sleeve pipe 11a expands along the inner top surface of the cap 18, and the peripheral edge thereof is sandwiched between the packings 18a and is tightly fixed to the cap 18.
[0021]
The cap 18 suspends and supports the sleeve pipe 11a and the suction pipe 11 in the polytank PT in which kerosene is stored, and is fastened and fixed to the polytank filling port PTa with a screw structure in a state where the cheese 22 described later is passed through. Thus, the fuel filler port PTa is sealed and the suction pipe 11 is positioned and fixed to the polytank PT. When the diameter of the cap 18 does not match the diameter of the polytank filler port PTa, as shown in FIG. 4, the adapter ADP is fastened and fixed to the polytank filler port PTa, and the cap 18 is fastened and fixed to the adapter ADP.
[0022]
Here, the discharge hose 13 is formed of a flexible synthetic resin in a bellows shape, and can be expanded and contracted to an appropriate size. The oil supply nozzle 13a does not have the flexibility like the discharge hose 13, and is formed in a substantially cylindrical shape with a material that can be inserted into the oil supply port CTa of the cartridge tank CT such as a kerosene fan heater to be supplied without bending. The kerosene discharge direction is changed at a substantially right angle downward at the tip of the discharge hose 13. An O-ring 13a1 and a stopper 13a2 are provided on the outer periphery of the tip of the oil supply nozzle 13a in order from the tip of the nozzle 13a.
[0023]
19 is a timer for setting the DC power supply time from the battery 15 to the electric pump body 12, 20 is a switch button for operating the timer 19, and 21 is when the timer 19 is operated by pressing the switch button 20. This is a power cable for supplying DC power from the battery 15 to the electric pump body 12. For this reason, the power cable 21 is wired from the battery 15 to the electric pump main body 12 along the inside of the discharge hose 13, the cheese 22, the sleeve pipe 11 a, and the suction pipe 11.
[0024]
22 is the cheese which comprises the communicating part of the suction pipe 11 and the discharge hose 13, and was equipped with the drain air port structure inside. The cheese 22 is formed in a cylindrical shape penetrating through the center of the cap 18, and a cylindrical nozzle receiving portion 23 is formed on the upper portion, here, directly above, so that the tip portion of the oil supply nozzle 13 a is detachable from above. Moreover, the side of the cheese 22 protruding upward from the cap 18 is formed with an insertion port 24 for connecting a discharge hose that is inserted into the base end of the discharge hose 13 and is continuous from the outside.
[0025]
The cheese 22 is restricted from moving up and down with respect to the cap 18 by fitting a collar attached to the outer peripheral surface of the penetrating portion penetrating the cap 18 into the annular groove on the inner surface of the cap 18. The O-ring sandwiched between the protrusions is pressed against the inner side surface, and is supported so as to be rotatable around the vertical axis while being in close contact with the cap 18.
[0026]
Since the upper end of the sleeve pipe 11a is fixed to the cap 18 and faces the lower end of the cheese 22 that penetrates the cap 18, both communicate with each other at the opposite position.
[0027]
The drain / air port structure is formed with a valve structure that opens when the tip of the oil supply nozzle 13a is attached to the nozzle receiving portion 23, and closes when the tip is detached, and is taken out and shown in FIG. In this way, a drain / air port 22a, a gate valve 22c, and a coil spring 22d that communicate the inside of the cheese 22 with the inner bottom surface of the nozzle receiving portion 23 are provided.
[0028]
The coil spring 22d urges the gate valve 22c upward by being compressed and disposed between the lower surface of the pressure receiving portion 22c1 of the gate valve 22c and the inner bottom surface of the nozzle receiving portion 23. The gate valve 22c opens against the spring biasing force of the coil spring 22d and opens the drain / air port 22a to open the upper end opening of the suction pipe 11 and the tip when the oil supply nozzle 13a tip is attached to the nozzle receiving portion 23. (See FIG. 1), the valve is closed by the spring biasing force at the time of detachment, and the drain / air port 22a is closed to disconnect the communication (see FIG. 2).
[0029]
In the above-described oil supply pump of the present invention, the oil supply to the cartridge tank CT is performed as follows.
[0030]
First, the suction pipe 11 is inserted into the poly tank PT from the fuel filler port PTa, and the cap 18 is screwed to the fuel filler port PTa. As a result, the oil filling port PTa of the poly tank PT is sealed, and the suction pipe 11, and thus the whole oil pump is positioned and fixed to the poly tank PT. Next, the battery case 16 also serving as a grip is gripped, and the tip of the oil supply nozzle 13a is pulled out from the nozzle receiving portion 23 and inserted into the oil filling port CTa of the cartridge tank CT (see FIG. 2). At this time, the discharge hose 13 is formed in a bellows, and the cheese 22 to which the proximal end of the discharge hose 13 is connected is rotatable with respect to the cap 18, so that the oil supply nozzle 13a can be easily moved to the oil inlet CTa. Can be plugged in. Further, during this refueling operation, the front end of the refueling nozzle 13a is pulled out from the nozzle receiving portion 23, so that the gate valve 22c is closed.
[0031]
Before this refueling operation, if the capacity of the poly tank PT is 18 liters or 20 liters, for example, the suction pipe 11 is slid in advance with respect to the sleeve pipe 11a and the axial length thereof is adjusted. No more than the desired amount of oil is supplied.
[0032]
In this state, when the timer 19 is set to a time corresponding to the capacity of the cartridge tank CT and the switch button 20 is pressed, the electric pump body 12 is supplied with DC power from the battery 15 and sucks up the kerosene in the poly tank PT. The sucked kerosene is supplied into the cartridge tank CT through the suction pipe 11, the cheese 22, the discharge hose 13, and the oil supply nozzle 13a. When the set time of the timer 19 elapses, the electric pump main body 12 stops the DC power supply from the battery 15, stops its operation, and ends the refueling.
[0033]
When the refueling is finished, the battery case 16 serving also as a grip is gripped again, and when the refueling nozzle 13a portion is pulled up as it is, a slight residual oil in the refueling nozzle 13a drops into the cartridge tank filling port CTa, and the discharge hose 13 The residual oil inside flows backward to the cheese 22 side by its own weight, and returns to the inside of the suction pipe 11 and eventually to the inside of the polytank PT (oil is good).
[0034]
Next, the tip of the oil supply nozzle 13 a is inserted into the nozzle receiving portion 23. The depth to insert is adjusted so that it may become an appropriate position with the stopper 13a2. Further, the front end portion of the oil supply nozzle 13a is moderately supported and fixed by the O-ring 13a1, and the nozzle receiving portion 23 and the outside of the pump are blocked from each other to prevent vaporization and discharge of kerosene. Since the O-ring 13a1 is in pressure contact with the inner surface of the nozzle receiving portion 23, the O-ring 13a1 also functions to prevent the oil supply nozzle 13 from dropping from the nozzle receiving portion 23 when the polytank PT falls.
[0035]
When the tip of the oil supply nozzle 13a is inserted into the nozzle receiving portion 23, the pressure receiving portion 22c1 of the gate valve 22c is pushed down, thereby opening the gate valve 22c, so that the remaining oil supply nozzle 13a is dripped. The falling residual oil also passes through the drain / air port 22a and returns into the suction pipe 11 and eventually into the polytank PT.
[0036]
According to this embodiment using the electric pump main body 12, since the battery 15 for driving the electric pump main body 12 is accommodated above the oil supply nozzle 13a, the load from the battery 15 is applied to the oil supply nozzle 13a, and the oil supply is performed. Even when a reaction force or an inadvertent external force is applied to the discharge hose 13, the oil supply nozzle 13a does not come out of the oil supply port CTa and the kerosene is not scattered.
[0037]
Further, since the battery case 16 that accommodates the battery 15 has a grip shape, the battery case 16 can also be used as a grip, and it is not necessary to provide a separate accommodation space for the battery 15, so that the overall size is not increased.
[0038]
In place of the timer 19, a liquid level sensor (not shown) is attached to a position equivalent to that of the conventional oil pump shown in FIG. 7, here the tip 13a of the oil nozzle 13a, and kerosene is supplied to the cartridge tank inlet CTa. The electric pump main body 12 may be turned off and the refueling may be terminated when the liquid level sensor detects that the pressure has reached the vicinity.
[0039]
Further, when a liquid level sensor is provided on the cartridge tank CT side, the oil supply operation by the electric pump main body 12 is continued, and when a display indicating the saturation of kerosene is issued from the cartridge tank CT side, it is not illustrated. The refueling operation of the electric pump main body 12 may be stopped by pressing a stop button.
[0040]
Moreover, although the cheese 22 which is a communication part and the nozzle receiving part 23 are shape | molded integrally, the separate member connected and engaged with each other may be sufficient.
[0041]
The oil pump of the present invention can be applied not only to the electric type described above but also to a manual type. FIGS. 5 and 6 are partially cut side views showing an embodiment of the manually operated oiling pump of the present invention. FIG. 5 shows a state when not in use and FIG. 6 shows a state when in use (oiling state). ing.
[0042]
In FIGS. 5 and 6, reference numeral 52 denotes a manual pump body. Reference numeral 54 denotes a communication portion between the suction pipe 11 and the discharge hose 13, and a valve body (not shown) that prevents backflow from the discharge hose 13 side to the communication portion 54 is provided inside the cylindrical shape. Reference numeral 59 denotes a grip which is provided at the top end of the discharge hose 13 so as to be integrated with the oil supply nozzle 13a and continuously thereabove. In addition, the same reference numerals as those in FIGS. 1 and 2 indicate the same or corresponding parts.
[0043]
The manual pump main body 52 is formed of a flexible cylindrical body, and the communication portion is formed by repeatedly holding and releasing the manual pump main body 52 or repeatedly extending and contracting the manual pump main body 52 in the vertical direction while holding the grip 59. By changing the internal pressure of 54 and simultaneously opening and closing the valve body, the kerosene in the polytank PT is sucked up and supplied into the cartridge tank CT.
[0044]
The drain / air port 22a is formed in an upper portion of the manual pump main body 52 above the communication portion 54, and further, a nozzle receiving portion 23 is erected thereabove. As shown in FIG. 6, when the manual pump main body 52 is repeatedly expanded and contracted to supply oil, the oil supply nozzle 13a is extracted from the nozzle receiving portion 23 and inserted into the oil supply hole CTa of the cartridge tank CT. Closes the drain / air port 22a, and air does not flow from the drain / air port 22a during the operation of the pump.
[0045]
Since the inside of the polytank PT is depressurized by sucking up kerosene, the cap 18 is loosened or the cap of another air inlet (not shown) of the polytank PT is loosened to allow the outside air to flow in during the refueling operation. . Further, a check valve for preventing the outflow of kerosene from the polytank PT may be provided in the cap 18, and outside air may be allowed to flow from the check valve.
[0046]
When the refueling is finished and the tip of the refueling nozzle 13a is inserted into the nozzle receiving portion 23, the pressure receiving portion 22c1 of the gate valve 22c is pushed down, thereby opening the gate valve 22c. The residual oil dripping from the oil returns to the polytank PT via the drain / air port 22a, the manual pump main body 52, and the suction pipe 11. As described above, in the present embodiment, except that the oil is manually operated, the operation is the same as that of the electric oil pump of the present invention shown in FIGS. 1 and 2, and the same effect can be obtained.
[0047]
Further, in the manual type oil supply pump, kerosene remains in the discharge hose 13 due to the action of the valve body that prevents the backflow to the communication portion 54 after the oil supply is completed. The tip of the nozzle 13a is inserted into the nozzle receiving portion 23, and its periphery is completely blocked from the outside by the O-ring 13a1, so that the kerosene odor does not diffuse into the room. The kerosene remaining in the discharge hose 13 falls into the polytank PT from the gap of the valve body by its own weight with the passage of time.
[0048]
Further, the residual oil remaining in the pump when refueling is finished is manually pressed on the upper part of the gate valve 22c in the state shown in FIG. 6 before the tip of the refueling nozzle 13a is inserted into the nozzle receiving part 23. It may be processed. When the gate valve 22c is pushed down, outside air flows from the drain / air port 22a, the residual oil in the discharge hose 13 and the oil supply nozzle 13a goes to the cartridge tank CT, and the residual oil in the suction pipe 11 goes to the poly tank PT, respectively. It falls with its own weight.
[0049]
Moreover, since the grip 59 is provided above the oil supply nozzle 13a, the insertion work to the oil supply hole CTa or the nozzle receiving part 23 can be performed easily.
[0050]
【The invention's effect】
According to the present invention, the tank filler opening is closed by the cap with the suction pipe inserted into the tank, and the nozzle receiving portion for attaching / detaching the distal end portion of the discharge tubular body is also mounted on the distal end portion of the discharge tubular body. Sometimes it is cut off from the outside air by its tip, and at the time of detachment by the valve structure. Therefore, kerosene is not vaporized and released from the tank refueling port into the outside air, even when not in use or during refueling, there is no risk of kerosene odor diffusion and ignition, and tank tilting or overturning during refueling, etc. There is no spillage of kerosene.
[0051]
In addition, the nozzle receiving part that allows the discharge tubular body tip part to be detachable from above is positioned above the communication part of the suction pipe with the discharge tubular body, not on the cap surface, so the cap is formed with a large diameter. There is no need to do this, and there is an effect that it can be applied to a general-purpose tank having an oil filler port of a standard diameter.
[0052]
According to the second aspect of the present invention, since kerosene remaining in the discharge tubular body is all returned to the tank after the refueling (oil drainage is good), there is no need for a separate drain receptacle or the like, and the oil draining treatment after the refueling There is no need for work.
[0053]
Furthermore, in the invention of claim 2, since the battery case that houses the battery serving as the power source of the electric pump is integrally connected above the distal end portion of the discharge tubular body, the load from the battery 15 is applied to the distal end of the discharge tubular body. Even if a reaction force or an inadvertent external force is applied to the discharge annular body when it is applied to the part, the tip end portion of the discharge ring does not come out of the oil filling port and the kerosene is not scattered.
[0054]
Further, since the battery case can also be used as the grip as the shape of the grip, it is not necessary to provide a separate battery storage space, and the overall configuration can be reduced in size.
[Brief description of the drawings]
FIG. 1 is a partially cut side view (non-use state) showing an embodiment of an electric kerosene oil supply pump according to the present invention.
FIG. 2 is a partially cut side view (in use).
FIG. 3 is an enlarged view showing a main part of the drain / air port structure in FIG.
4 is a cross-sectional view showing a state in which a cap is fastened and fixed to a plastic tank oil filler port using an adapter in the oil pump of the present invention shown in FIG. 1; FIG.
FIG. 5 is a partially cut side view (non-use state) showing a manually operated kerosene oil supply pump according to another embodiment of the present invention.
FIG. 6 is a partially cutaway side view (in use).
FIG. 7 is a perspective view showing an example of a conventional oil pump.
FIG. 8 is a perspective view showing another example of a conventional oil pump.
[Explanation of symbols]
11 Suction pipe 11a Sleeve pipe 11b, 13a1 O-ring 12 Electric pump body 13 Discharge hose (discharging tubular body)
13a Refueling nozzle (discharging tubular body)
13a2 Stopper 15 Battery 16 Grip and battery case 18 Cap 18a Packing 19 Timer 20 Switch button 21 for timer operation Power cable 22 Cheese (communication part)
22a Drain / air port 23 Nozzle receiving portion 22c Gate valve 54 Communication portion PT Poly tank PTa Poly tank filler port CT Cartridge tank CTa Cartridge tank filler port ADP adapter

Claims (2)

For kerosene that discharges the kerosene sucked into the suction pipe (11) by the operation of the pump body (12) (52) to the outside of the pump through the discharge tubular body (13) communicating with the suction pipe (11). In the oil pump,
The oil supply port (PTa) is closed and fixed by tightening and fixing to the oil supply port (PTa) of the tank (PT) in a state where the suction pipe (11) is inserted into the tank (PT) in which kerosene is stored. A cap (18) for positioning and fixing the suction pipe (11) to the tank (PT);
Located above the communication portion (22) (54) between the suction pipe (11) and the discharge tubular body (13), the tip end portion (13a) of the discharge tubular body (13) is detachable from above. And when the tip (13a) is attached to the nozzle receiver (23), the valve is opened to allow the suction pipe (11) and the tip (13a) to communicate with each other. And a drain / air port structure having a valve structure (22c) that closes when detached. The battery case (16) that houses the battery (15) that serves as the power source for the electric pump (12) is integrally connected above the distal end (13a) of the discharge tubular body (13). The oil supply pump for kerosene according to claim 1, wherein

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