JPH02161207A - Liquid supply mechanism for cartridge - Google Patents

Abstract

PURPOSE:To supply liquid again easily by providing a shield member, a valve chamber having an air passage and an air discharge port, and a valve member which clogs the air discharge port against the liquid penetrated into said valve chamber when an air-tight state is produced by depressing the part around a valve port during mounting a liquid supply mechanism with a cartridge tank. CONSTITUTION:When a main body 12 is mounted with a port member 4 of a cartridge tank 1, a pipe member 19 depresses down a valve disc 7 so that a valve port 4a may be opened, which positions a discharge port of the pipe member inside the cartridge tank. Therefore, when a liquid supply pump is operated, the liquid from the liquid supply pump is resupplied into the cartridge tank by way of a discharge hose, a flow passage in the pipe member, and the discharge port 19a of the pipe member. The air in the cartridge tank or more specifically, those portions of the air which are brought into a sealed state by the gap between the valve port and the pipe member and a shield member 23, are discharged outside by way of an air passage 24a of the valve chamber, the valve chamber 24, and the discharge port 24b. When liquid is excessively supplied again, the liquid is penetrated into the valve chamber by way of the gap between the valve hole and the pipe member, the portions placed in a sealed state by a shield member and the air passage so that the valve member may clog the air discharge port.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) The present invention is a method suitable for replenishing a closed cartridge tank with fuel liquid, such as petroleum, for example, for supplying fuel liquid such as petroleum to a petroleum heater. This invention relates to a liquid supply mechanism for a cartridge tank.

(Prior Art) Conventionally, for example, in oil heaters, sealed cartridge tanks have been used to supply oil as liquid fuel. This cartridge tank has a structure in which a cap having a valve body which is biased by a spring so as to normally close the valve hole is screwed onto a mouth body at the bottom.

When this cartridge tank is inserted into the tank storage part of the kerosene heater and placed on the saucer part, the protrusion provided on the saucer presses the valve body of the cartridge tank to open the valve hole. , so that a constant amount of oil is always supplied to the saucer. Therefore, when replenishing oil into the cartridge tank removed from the oil heater,
After inverting the cartridge tank so that the bottom is on top, remove the cap from the eye, and insert, for example, the discharge hose of an electric refueling pump into the eye, which has a larger opening area due to the removal of the cap. , the oil supply pump is operated.

(Problems to be Solved by the Invention) In the conventional configuration, when refilling the cartridge tank with petroleum, it is time consuming to remove the cap from the eye and reattach it, and the removal and attachment are sometimes difficult for the user to do. There is a problem with hands and fingers getting dirty with oil. Moreover, when reattaching the can knob to the eye, care must be taken to properly tighten the cap so that the cartridge tank is completely sealed.

The present invention has been made in view of the above circumstances, and its purpose is to enable easy replenishment of liquid to a cartridge tank, to avoid staining the user's hands and fingers with liquid, and to
Moreover, it is an object of the present invention to provide a liquid supply mechanism for a cartridge tank that does not require careful attention to sealing the cartridge tank after replenishing the liquid.

[Structure of the Invention] (Means for Solving the Problems) The liquid supply mechanism for a cartridge tank of the present invention provides a liquid supply mechanism for a cartridge tank of the present invention. A main body for replenishing liquid, which is attached to the tip of a discharge hose of a liquid supply pump and has a flow path communicating with the discharge hose, and is removably attached to the eye body; The main body is provided with a flow path that communicates with the flow path of the main body, and a flow port that communicates this flow path with the outside. a pipe portion that is inserted with a gap between the tube portion and positions the communication port within the cartridge tank; and a valve hole that is provided in the main body and is provided in the eye body when the main body is attached to the eye body. a shielding member that presses against the surrounding portion of the main body to form an airtight seal; a valve chamber provided in the main body and having an air passage opening inside the shielding member and an air discharge port communicating with the outside; The valve member is arranged to close the air discharge port by allowing liquid to enter the valve chamber.

(Function) According to the cartridge tank fluid supply mechanism of the present invention, when the main body is attached to the eye of the cartridge tank, the pipe section presses the valve body to open the valve hole, thereby opening the outflow port of the pipe section. is located inside the cartridge tank. Therefore, when the liquid supply pump is operated, the liquid from the liquid supply pump is replenished into the cartridge tank through the discharge hose, the flow path of the main body, the flow path of the pipe section, and the outlet of the pipe section. In this case, the air in the cartridge tank flows through the gap between the valve hole and the pipe section.

The air is discharged to the outside through the portion sealed by the shielding member, the air passage of the valve chamber, the valve chamber, and its air outlet.

In addition, when excessive liquid is replenished into the cartridge tank by the liquid supply pump, the liquid flows through the gap between the valve hole and the pipe section, the part sealed by the shielding member, and the air passage to the valve. This causes the valve member to close the air outlet and prevent further replenishment of liquid even if the liquid supply pump is operating.

(Example) An example of the present invention will be described below with reference to the drawings.

FIG. 2 shows a portion of the bottom 2 of the sealed cartridge tank 1 in the opposite position from the position in which it is placed on a saucer (not shown) during normal use. This bottom 2 side is referred to as the upper side. That is, the bottom 2 of the cartridge tank 1 is provided with an eye 3 having a male threaded part 3a projecting upward, and a cap 4 having a valve hole 4a and a female thread 4b is attached to the eye 3 with an elastic material such as rubber. They are screwed and fixed in an airtight manner via a gasket 5.

A curled portion 4C is formed around the lower end of the cap 4. Note that this cap 4 forms a part of the mouth body 3 of the cartridge tank 1. Further, a guide tube 6 is fixed to the cap 4 by welding a flange 6a at its upper end. In this guide cylinder 6, a plurality of oil circulation ports 6b are formed in the middle part of the circumferential side, and air circulation ports 6C are formed near the flange 6a of the circumferential side.
is formed, and a stop portion 6d is formed at the bottom.

A valve body 7 manufactured by deep drawing or the like is housed inside this guide cylinder 6 so as to be slidable in the vertical direction.
A compression coil spring 8 is interposed between the stop portion 6d and the compression coil spring 8, and the valve body 7 is normally urged upward by the compression coil spring 8 to close a rubber seal ring 9 such as an O-ring. The valve hole 4a of the intervening cap 4 is closed. Note that a rib 6e (see FIG. 6) is formed on the circumferential side of the guide cylinder 6 so as to extend in the vertical direction.This improves the overall strength and strengthens the valve body 7.
It is designed to smooth the vertical movement of the

In FIG. 3, the discharge hose 10 is for an electric oil supply pump for oil-burning equipment, which is a liquid supply pump. This oil supply pump is well known in the Japanese Industrial Standards 82037, etc., and is not shown in the drawings. When the switch is turned on to drive the electric motor, the blades rotate to suck in oil and send it to the discharge hose 10 via the oil pipe.

Now, in FIG. 3, the syringe 11 is shown. That is, the syringe 11 includes a main body 12 made of, for example, synthetic resin. This main body] 2 has a stepped cylindrical shape, and a flow passage 13 is formed inside thereof. And this main body 12
The distal end of the discharge hose 10 is connected to the upper end of the discharge hose 10 and is fixed liquid-tightly by a band 14. Furthermore, the main body 12
Two stepped grooves 15.16 are bored around the periphery of the hook 17.18, and the fixed legs 17a, 18a of the hook 17.18 are inserted into these stepped grooves 15, 16. 17a
, 18a, the detent hooks 17b, 18b are attached to the step portions 15a, 16a of the stepped grooves 15.16, and the fixing legs 17a,
It is engaged by the elastic restoring force of 18a. These hooks 17 and 18 are made of elastic materials such as synthetic resin and metal, and have fixing claws 17c and 18c formed at the lower end, and 11-eye portions 17d and 18d formed at the middle.
Handle portions 17e and 18e are formed at the top. on the other hand,
The pipe portion 19 is formed integrally with the main body 12, and has a flow passage 20 that communicates with the flow passage 13 of the main body 12 formed therein. The tube portion 19 has a vertically elongated shape,
An outlet 19a is formed at the lower part of the circumferential side, and a through hole 19b is formed at the lower end of the circumferential side. Also, pipe part 1
A liquid level sensor 21 for controlling the above-mentioned oil supply and pump electric motor M (see FIG. 8) is housed in the lower end portion of 9. As shown in FIG. This liquid level sensor 21 is equipped with a prism 21a, and a phototransistor PQ is included in the prism 21a.
and a light emitting diode D (both shown in FIG. 8) are housed therein, and these terminals are connected to the lead wire 21b. This lead wire 21b is connected to the flow path 20 of the pipe portion 19.
1 through the flow path 13 of the main body 12 and the inside of the discharge hose 10, and is led out to the control section of the fuel pump. The conical top of the prism 21a of the liquid level sensor 21 in the pipe part 19 faces the a-hole 19b, and the part above the liquid level sensor 21 in the pipe part 19 is filled with a packing material 22. Fixed. Further, the upper end portion of a ring-shaped shielding member 23 made of an elastic material such as rubber is inserted and fixed into the main body 12, and this shielding member 23 surrounds the protruding base portion of the tube portion 19.

As shown in FIG. 1, the main body 12 has a circular valve chamber 2.
4 is formed. In this valve chamber 24, an air passage 24a opening inside the shielding member 23 is provided at its lower end.
is formed, an air outlet 24b communicating with the upper outside is formed at the upper end, and four guide protrusions 24C are formed at the inner side.
(See FIG. 7) are formed to extend vertically.

A ring-shaped packing 25 made of rubber, for example, is attached to the lower end of the air discharge port 24b in the valve chamber 24. Further, a columnar float 26 as a valve member is housed in the valve chamber 24, and the upper end thereof is formed in a conical shape, and the lower end thereof is formed in an arc shape. In this case, as shown in FIG. 7, the inner part of the valve chamber 24 and the float 2
A gap is formed between the guide protrusion 24c and the outer side of the guide ridge 24c.

As shown in FIG. 1, the main body 12 includes a tilt switch 2.
7 is installed. This tilt switch 27 is of a completely sealed type that uses, for example, a small amount of mercury particles (shape similar to a sphere with a diameter of about 3 m + s) as an inertia, and is turned on when the syringe 11 is in its normal position on the vertical line. The injector 11 is turned off when the injector 11 is tilted from the vertical line, for example, in any direction from 30 degrees to 50 degrees. And the lead wire 27a of this tilt switch 27.

27b passes through the flow path 13 of the main body 12 and the discharge hose 10, and is led out to the control section of the oil supply pump.

FIG. 8 shows an electrical circuit diagram of a control section in a well-known auto-stop oil supply pump using a liquid level sensor 21. That is, E is a power source (for example, 3 volts with two dry batteries), SW is a start switch consisting of a normally open push button switch, SW2 is a stop switch consisting of a normally open push button switch, Q+ to Q4 are transistors, and R3 to R7 are The resistors C1 to C9 are capacitors, and their connections are as shown in FIG. The lead wire 21b of the liquid level sensor 21 shown in FIGS. 1 and 3 to 5 is a three-core cord in which the three wires connected to the phototransistor PQ and the light emitting diode D are insulated from each other. Being in a state.

Next, the operation of this embodiment will be explained.

When the syringe 11 shown in FIG. 3 is attached to the eye body 3, that is, the cap 4 of the cartridge tank 1 shown in FIG. 7 and press down the main body 12. Then, the valve body 7 is pressed and slides downward against the spring force of the compression coil spring 8 to open the valve hole 4a. Therefore,
The lower end of the pipe portion 19 is inserted into the valve hole 4a and enters the guide cylinder 3, that is, the cartridge tank 1. In this case, a gap is formed between the valve hole 4a and the pipe portion 19. In this state, when the main body 12 is further pushed down, the fixing claws 17c and 18c of the hooks 17 and 18 are released as shown in FIG.
comes into contact with the shoulders of the cap 4 and elastically opens on both sides from the state shown by the two-dot chain line to the state shown by the solid line due to its inclined surface. Thereafter, when the main body 12 is pushed down further, the fixing claws 17c and 18c of the hooks 17 and 18 slide on the circumferential side of the cap 4 with the hooks 17 and 18 open on both sides, and finally, as shown in FIG. and 18c is the curled portion 4C of the cap 4
The elastic restoring force engages the lower end of the curled portion 4C.

In this state, the outlet 19a of the pipe portion 19
is located at the flow hole 6b portion of the guide tube 6.

In this way, the syringe 11 is connected to the cartridge tank 1.
When the cap 4 is attached to the cap 4, as shown in FIGS. 1 and 5, the lower end of the shielding part 23 is pressed against the part of the upper surface of the cap 4 located around the valve hole 4a. Make an airtight seal. In this case, as shown in FIG. 1, when the syringe 11 is properly attached to the cap 4, it is on the vertical line, and the tilt switch 27 is in the on state.

In FIG. 8, when the start switch SW1 is suppressed for a short time and turned on, the transistor Q2 is turned on.
is turned on, and in conjunction with this, the transistor Q1 is turned on and current flows through the motor M, and the motor M is driven to operate the fuel pump.

Note that when the transistor Q is turned on, the light emitting diode D of the liquid level sensor 21 is energized and starts emitting light, and the light is reflected by the prism 21a and received by the phototransistor PQ. turns on. Thereafter, when the start switch SW1 is turned off, the transistor Q4 is turned on, and the on state of the transistor Q1 is maintained. When the oil supply pump operates, liquid oil is discharged into the discharge hose 1o, and the discharged oil flows through the flow path 13 of the discharge hose 101 main body 12, as shown in FIG. Flow path 20 of pipe section 19. The cartridge tank 1 is replenished through the outlet 19a of the pipe portion 19 and the communication port 6b of the guide tube 6. In this case, the air in the cartridge tank 1 flows through the flow hole 6c of the guide cylinder 6, the valve hole 4a of the cap 4, and the pipe portion 1.
9, the space sealed by the shielding member 23, the air passage 24a, the gap between the valve chamber 24 and the float 26, and the air outlet 24b. In this way, when the petroleum is refilled into the cartridge tank 1 and the oil level reaches the lower end of the pipe part 19, that is, reaches the specified liquid level, the oil flows from the through hole 19b to the lower end of the pipe part 19. It begins to flow into the department. And prism 21
When the conical surface part a becomes immersed in oil, the light from the light emitting diode D is no longer reflected by the prism 21a, and the transistor PQ is turned off.

This turns on transistor Q3, thus
Transistor Q2 is turned off, transistors Q1 and Q4 are turned off, and motor M of the fuel pump is stopped.

If the stop switch SW2 is suppressed and turned on for a short period of time during oil replenishment while the electric motor M of the oil supply pump is being driven, the transistor Q is immediately turned on, so the electric motor M is turned on in the same manner as described above. will be stopped.

When the oil has been refilled into the cartridge tank 1 as described above, the hook 17.
When the handles 17e and 18e of the cap 18 are held together and the stoppers 17d and 18d are slightly pressed, the main body 12 is pushed down a little and the fixing claws 17c and 18c elastically open on both sides to connect with the curled part 4c of the cap 4. The relationship will now be cancelled. In this state, if the entire syringe 11 is pulled up, the pipe portion 19 will separate upward from the valve hole 4a of the cap 4, and the removal of the syringe 11 will be completed. Then, the valve body 7 is urged upward by the spring force of the compression coil spring 8, and automatically closes the valve hole 4a.

By the way, when the syringe 11 is attached to the cap 4 of the cartridge tank 1 and petroleum is being supplied into the cartridge tank 1 from the fuel pump as shown in FIGS. 1 and 5, for example, the liquid level sensor 21 If C4 is out of order, the electric motor M will not be stopped even if the oil level in the cartridge tank 1 reaches the liquid level sensor 21 portion, and the oil supply pump will continue to operate. Therefore, the cartridge tank 1 is oversupplied with oil and the oil level continues to rise, and the oil is poured into the gap between the valve hole 4a and the pipe section 19, the space sealed by the shielding member 23, and the air. It flows into the valve chamber 24 via the passage 24a. When a predetermined amount of oil flows into the valve chamber 24, the float 26 floats upward and its tip comes into pressure contact with the backings 2 and 5, closing the air outlet 24b. Therefore, after that, even if the oil supply pump is operating, oil is not replenished into the cartridge tank 1.

The above is a case in which the liquid level sensor 21 fails, but the same applies even if, for example, the control section of the oil supply pump shown in FIG. 8 fails and the γ motor cannot be stopped.

Furthermore, if the cartridge tank 1 is tilted or fallen for some reason while oil is being refilled into the cartridge tank 1 by the oil supply pump as described above, the injector 11 will also be tilted at an angle of 30 to 50 degrees. Since it is tilted from the vertical line, the tilt switch 27
is immediately turned off and the electric motor M is stopped.

According to this embodiment, the following effects can be obtained. That is, when the main body 12 is attached to the cap 4 of the cartridge tank l, the pipe part 19 presses the valve body 7 to open the valve hole 4a, and the oil from the oil supply pump is transferred to the flow path 20 of the pipe part 19 and the flow port 19a. Since oil is refilled into the cartridge tank 1 through the cartridge tank 1, there is no need to remove the cap 4 from the eye body 3 when refilling the cartridge tank 1, unlike in the past. When the main body 12 is pulled up, the pressing force of the valve body 7 by the pipe portion 19 is released, and the valve body 7 is urged upward by the compression coil spring 8 and automatically closes the valve hole 4a.
Unlike in the past, there is no need to reattach the cap 4, and therefore the cartridge tank 1 can be easily refilled with oil, and the user's hands and fingers are not soiled with oil. Moreover, since there is no need to reattach the cap 4, the cartridge tank 1 does not need to be meticulously sealed. Furthermore, even if the petroleum is replenished to the specified level when replenishing the oil into the cartridge tank 1, if the electric motor M is not stopped due to a failure of the liquid level sensor 21 or the control unit and is not in an oversupply state, the oil Since the oil flows into the valve chamber 24 of the main body 12 and causes the float 26 to float, the float 26 closes the air outlet 24b, so even if the oil supply pump is operated thereafter, oil is not replenished. Therefore, oil will not overflow from the air outlet 24b of the main body 12 and continue to flow away.

When the injector 11 is tilted by 30 to 50 degrees or more from the vertical line, the tilt switch 27 is turned off and the electric motor M is stopped. This does not continue, and in this case, oil does not continue to flow out from the air outlet 24b.

In the above embodiment, the cap 4 is removably provided on the eye 3 of the cartridge tank 1, but they may be formed integrally.

Further, in the embodiment described in 1, the discharge hose 10 of an electric fuel pump is connected to the main body 12, but the discharge hose of a pneumatic fuel pump may be connected instead. The surface sensor 2] and the tilt switch 27 may be provided as necessary.

[Effects of the Invention] As explained above, the cartridge tank liquid supply mechanism of the present invention has the following features when replenishing liquid to the cartridge tank:
Unlike conventional methods, there is no need to remove and reattach the cap, making it easier to refill the liquid. Also, the user's hands and fingers are not soiled with liquid, and the cartridge tank is carefully sealed after refilling the liquid. without the need for
Furthermore, even if an excessive amount of liquid is replenished into the cartridge tank, it is possible to prevent the liquid from continuing to flow out to the outside.

[Brief explanation of the drawing]

The drawings show one embodiment of the present invention, and FIG. 1 is different from FIG. 5.
A vertical cross-sectional view at a position different from 0 degrees, Figure 2 is a vertical cross-sectional view of the bottom part with the cartridge tank turned upside down,
Fig. 3 is a longitudinal sectional view of the syringe, Fig. 4 is a longitudinal sectional view of the syringe in the middle of being installed in the cartridge tank, Fig. 5 is a longitudinal sectional view of the syringe in the cartridge tank, and Fig. The drawings are a cross-sectional view taken along the line ■--■ in FIG. 5, FIG. 7 is a cross-sectional view of the valve chamber portion, and FIG. 8 is an electric circuit diagram of the control section of the oil supply pump. In the drawing, 1 is a cartridge tank, 2 is a bottom, 3 is an eye, 4 is a cap (eye), 4a is a valve hole, 6 is a guide cylinder,
7 is a valve body, 10 is a discharge hose, 11 is an injector, 12 is a main body, 13 is a flow path, 17 and 18 are hooks, 19 is a pipe section, 19a is an outlet, 20 is a flow path, and 21 is a liquid level sensor ,
23 is a shielding member, 24 is a valve chamber, 24a is an air passage, 24
b indicates an air outlet, 26 a float (valve member), and 27 a tilt switch.

Claims (1)

[Claims] 1. A device for replenishing liquid to a cartridge tank equipped with a mouth body having a valve body that is normally biased to close the valve hole, and is attached to the tip of a discharge hose in a liquid supply pump. A main body having a flow path communicating with the discharge hose and detachably attached to the spout, a flow path provided in the main body communicating with the flow path of the main body, and a flow port communicating the flow path to the outside. When the main body is attached to the mouth body, the valve body is inserted into the valve hole while pressing the valve body so as to leave a gap therebetween, and the flow port is positioned within the cartridge tank. a pipe section that allows
a shielding member provided on the main body and press-contacted to the surrounding area of the valve hole in the mouth body to form an airtight seal when the main body is attached to the mouth body; and a shielding member provided on the main body and opening inside the shielding member. A cartridge comprising: a valve chamber having an air passageway and an air outlet communicating with the outside; and a valve member disposed within the valve chamber and closing the air outlet when liquid enters the valve chamber. Tank liquid supply mechanism.