JPH0543927B2 - - Google Patents

Description

[Detailed description of the invention] <Industrial application field> The present invention relates to a lubrication device for oil-burning equipment.

<Conventional technology> Conventionally, this type of lubrication device has consisted of an electric lubrication pump that delivers petroleum such as kerosene (hereinafter simply referred to as kerosene), and a lubrication pipe that is connected to the lubrication pump and inserted into the filler port of a kerosene tank. and a sensor installed at the tip of this lubrication pipe.When the kerosene level in the kerosene tank rises and comes into contact with this sensor, the sensor detects this and starts driving the electric lubrication pump. This is to finish the stop lubrication.

<Problems to be Solved by the Invention> However, since this sensor is entirely attached to the tip of the oil supply pipe, it is necessary to install wiring from the electric oil supply pump to the sensor through the oil supply pipe. Therefore, the cost of wiring materials and wiring work is high, and since the sensor is immersed in kerosene during lubrication, the entire sensor must have a strict oil-tight structure to prevent kerosene from entering. There is.

The present invention has been made in view of the above,
The object of the present invention is to provide a lubrication device for oil-burning equipment that does not require the work of installing wiring between an electric lubrication pump and a sensor, and allows the entire sensor to have a simple oil-tight structure.

<Means for Solving the Problems> In order to solve the above problems, the present invention provides a refueling cap attached to a tank to be refueled,
A holder body that fits into this fuel cap,
In this lubrication device for oil-burning equipment, the holder body is provided with a suction-side pump body connected by a lubrication cap, and the holder body and the suction-side pump body are provided with a lubrication valve and an exhaust valve in the lubrication cap. A fuel supply pipe connected to the fuel supply valve and an exhaust pipe connected to the exhaust valve are provided, a means to prevent air leakage is provided at the connecting portion between the holder body and the fuel supply cap, and the holder body is fixed to the fuel supply cap. The gist of the configuration is that a restraining means is provided for this purpose, and a sensor is provided for detecting oil flowing back into the exhaust pipe of the suction side pump body.

<Function> When the holder body is pushed into the fuel filler cap, the exhaust pipe pushes the exhaust valve open, and at the same time, the fuel filler valve is opened by the exhaust pipe and the fuel feed pipe is inserted into the fuel filler port.
The fuel filler port is closed. In this state, the lock spring engages in the lock groove, and the holder body is restrained by the fuel cap.

When the electric motor is energized, the kerosene in the storage tank is sucked up by the blades, the kerosene is supplied through the inlet and the oil supply pipe into the tank to which the fuel supply cap is attached, and the same volume of air as the supplied kerosene is sent to the exhaust pipe. through the exhaust outlet.

When the kerosene reaches the level of the fuel cap's exhaust port,
Kerosene is sucked in from the exhaust port, passes through the exhaust pipe, and returns to the storage tank from the exhaust port of the suction side pump body.

At this time, a sensor installed inside the exhaust pipe of the suction side pump body detects kerosene and issues a signal to stop the electric motor, stopping the supply of kerosene.

<Example> An example of the present invention will be described below with reference to FIGS. 1 to 5. Figure 1 shows the installation position of the sensor, and shows a cross-sectional view of the suction side pump body of the lubrication system, the lid of the storage tank, and a part of the storage tank.
Figure 2 is a diagram explaining the general structure of the sensor and the principle by which the sensor detects kerosene, Figure 3 is a cross-sectional view of the holder body on the discharge side of the oil filling device, the tank to be filled with oil, and the fuel cap. The figure shows a cross-sectional view of a state where the holder main body, tank, and oil supply cap are fitted together so that lubrication is actually possible, FIG. 5a is a partial cross-sectional view of another embodiment of the present invention, and FIG. Diagram a
AA cross-sectional views are shown respectively.

In FIG. 1, reference numeral 41 indicates a suction-side pump body which is the main body side of the lubrication device, reference numeral 23 indicates a storage tank, and reference numeral 24 indicates a lid that is press-fitted into an upper opening of the storage tank 23. The suction side pump body 41 includes a blade 20, an electric motor 19, a sensor 18, an oil feed pipe 13, and an exhaust pipe 14.

An exhaust pipe 14 is provided inside the oil supply chamber 13, and the oil supply pipe 13 and the exhaust pipe 14 are connected to an oil supply pipe 50.
are connected to an oil feed pipe 13 and an exhaust pipe 14 inside the holder main body 3 on the discharge side, respectively. The space between the oil feed pipe 13 and the exhaust pipe 14 is the oil feed path 4.
Also, the space within the exhaust pipe 14 forms an exhaust path 5. An electric motor 19 is coupled to the vane 20 and is powered by a motor lead 22 . A kerosene suction port 25 is formed at the lower end of the suction side pump body 41. A sensor 18 connected to a sensor lead wire 21 is provided in the exhaust pipe 5, and a storage tank 23 is provided at the lower end of the exhaust pipe 14.
An exhaust outlet 32 opening inward is formed.

In FIG. 2, the sensor 18 includes a light emitting section GL,
It includes a light receiving section PT and a prism 18a.
18b is the opposite slope of the prism 18a.

In FIG. 3, reference numeral 2 denotes a cartridge tank (hereinafter simply referred to as a tank) of an oil-burning device, and a fuel cap 1 is attached to one end of the tank 2 at an appropriate position via an airtight packing 51 and screw parts 52 and 53. , detachably attached. 3 is a holder main body on the discharge side of the lubricating device. Since the oil supply cap 1 and the holder body 3 are each provided with oil supply means and exhaust means, the oil supply cap 1 has a double valve structure, and the holder body 3 has a corresponding double pipe structure.

That is, the holder main body 3 is provided with an oil pipe 13 and an exhaust pipe 14 inside the oil pipe 13.
3 and the exhaust pipe 14 forms an oil feed path 4, and the space inside the exhaust pipe 14 forms an exhaust path 5. Furthermore, the holder body 3 is provided with a lock spring 8 that engages in a spring groove 29 provided on its inner peripheral surface, and an airtight packing 9 provided above the lock spring 8. Discharge pipe 14
An O-ring 10a is attached to the lower surface of the collar 28 formed near the lower end.

Further, the fuel cap 2 is provided with a coupling valve 6 and an exhaust valve 7 inside thereof via an O-ring 10c, and a fuel fill port 16 is provided on the top surface of the fuel cap 2, and a lock is provided on the outer peripheral surface. Grooves 40 are respectively formed. The fuel supply cap 1 also has an exhaust valve 7.
An exhaust valve spring 26 that urges the upper surface of the fuel supply valve 6 toward the inner surface of the fuel supply valve 6 and a fuel supply valve spring 27 that biases the upper surface of the fuel supply valve 6 toward the lower surface of the fuel supply port 16 are provided. A shot circuit prevention plate 15 is formed at the lower part of the fuel supply valve 6, and the center portion thereof includes:
An exhaust inlet 33 is formed, and this exhaust inlet 3
3 communicates with the space between the refueling valve 6 and the exhaust valve 7. An O-ring 10b is provided on the upper surface of the oil supply valve 6 to make the space between the oil supply valve 6 and the oil supply port 16 airtight.

Next, the operation of this embodiment will be explained.

Now, as shown in FIG. 4, when the holder main body 3 is pushed into the fuel cap 1, the exhaust pipe 14 first pushes the exhaust valve 7 open, and then the exhaust port 17 opens.
The ring 10a provides an airtight seal. At the same time, the oil supply valve 6 is opened by the collar 28 of the exhaust pipe 14, the oil supply pipe 13 is fitted into the oil supply port 16, the airtight packing 9 comes into contact with the top surface of the fuel supply cap 1, and the oil supply port 16 is sealed. In this state, the lock spring 8 engages in the lock groove 40, and the holder main body 3 is restrained by the oil supply cap 1.

Next, when the electric motor 19 is energized, the kerosene in the storage tank 23 is sucked up by the blades 20, passes through the suction port 25, and is supplied into the tank 2 through the oil feed path 4. At this time, the fuel filler port 16
is completely sealed by the airtight gasket 9, so the same volume of air as the supplied kerosene flows into the exhaust path 5.
The air passes through the air and exits from the exhaust outlet 32.

As the supply of kerosene to the tank 2 further progresses and the kerosene reaches the height of the exhaust inlet 33 of the fuel supply cap 1, the kerosene is sucked from the exhaust inlet 33, passes through the inside of the exhaust passage 5, and reaches the pump body on the suction side. 41 returns into the storage tank 23 through the exhaust outlet 32.

At this time, the kerosene is in the prism 1 of the sensor 18.
8a comes into contact with the reflective surface 18c. When kerosene is not in contact with this reflective surface 18b, the light emitted from the light emitting part GL is reflected on the reflective surface 18, as shown in FIG. 2a.
b and is captured by the light receiving section PT, and the sensor 18 is configured not to emit a signal to the outside. However, when the kerosene comes into contact with the reflective surface 18b, the light emitted from the light emitting part 18 is reflected by the reflective surface 18c.
Since the reflected light travels into the kerosene without being reflected, the reflected light no longer reaches the light receiving part PT. Therefore, the sensor 18 detects this and issues a signal to stop the electric motor 19, so the supply of kerosene is stopped. Next, the holder main body 3 is removed from the oil supply cap 1 to complete the oil supply.

Therefore, according to this embodiment, not only can the wiring that runs through the oil pipe 50 to the sensor be eliminated, but also the sensor can be submerged in kerosene.
This is an extremely short period of time between when kerosene flows back from tank 2 and the electric motor stops.
This has the advantage that there is no need to make the oil-tight structure of the entire sensor as strict as in the past.

FIG. 5 shows another embodiment of the present invention, in which, for example, FIG.
As shown in FIG.
3 in common, and an exhaust pipe 14 is installed inside the oil pipe 13.
The sensor 18 is mounted such that only the reflecting surface 18b of the sensor 18 is exposed inside the exhaust pipe 14. In this case, the reflective surface 18b
Since only the sensor 18 needs to have an oil-tight structure, there is an advantage that the structure of the sensor 18 can be made simpler than that of the embodiment shown in FIG.

<Effects of the Invention> As explained above, according to the present invention, a sensor for detecting the backflow of kerosene is attached to the exhaust passage of the suction side pump body, so that the suction side pump body and the end of the oil supply pipe, which were conventionally required, are installed. Not only can you eliminate the work of installing wiring between the sensors in the parts, but the sensors can also be submerged in kerosene in the tank 2.
Since the time period between kerosene flowing backwards and the electric motor stopping is extremely short, there is an advantage that the oil-tight structure of the entire sensor can be made simpler than before.

[Brief explanation of the drawing]

FIGS. 1 to 5 show an embodiment of the present invention,
Figure 1 shows the mounting position of the sensor.
Figure 2 is a cross-sectional view of the suction side pump body, storage tank lid, and part of the storage tank of the lubrication system. Figure 2 is a diagram explaining the general structure of the sensor and the principle of how the sensor detects kerosene. Figure 3 is a diagram showing the lubrication side. Figure 4 is a cross-sectional view of the holder body on the discharge side of the device, the tank to be lubricated, and the refueling cap, Figure 4 is a cross-sectional view of the holder body, tank, and refueling cap in a state in which they are fitted and can actually be lubricated. FIG. 5a shows a partial sectional view of another embodiment of the present invention, and FIG. 5b shows a sectional view taken along the line AA in FIG. 5a. 1... Fuel supply cap, 2... Tank, 3... Holder body, 4... Oil feed path, 5... Exhaust path, 6...
...Refueling valve, 7...Exhaust valve, 8...Lock spring, 9...Airtight packing, 13...Oil pipe, 14
... Exhaust pipe, 18 ... Sensor, 23 ... Storage tank, 29 ... Spring groove, 40 ... Lock groove, 41 ... Suction side pump body, 51 ... Airtight packing.

Claims (1)

[Claims] 1 Oil-burning equipment equipped with a refueling cap attached to a tank to be refueled, a holder body fitted to the refueling cap, and a suction side pump body connected to the holder body via a lubricating pipe. In the oil supply device, the oil supply cap is provided with a fuel supply valve and an exhaust valve, the holder body and the suction side pump body are provided with an oil supply pipe connected to the oil supply valve and an exhaust pipe connected to the exhaust valve, and the holder body A means for preventing air leakage is provided at the connecting portion between the holder body and the oil supply cap, a restraint means is provided for fixing the holder body to the oil supply cap, and a sensor detects oil flowing back into the exhaust pipe of the suction side pump body. A lubrication device for oil-burning equipment, characterized by being provided with.