JPS6143760Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to an improvement in an oil supply device that can prevent pulsation pressure.

Vane pumps are generally used in oil supply systems, but these vane pumps have a circularly machined pump cam ring (vane sliding part) so that they can be produced at low cost, so there is no pulse on the discharge side. Pressure is becoming more likely to occur. However, when this pulsating pressure occurs, it has an adverse effect on the flow meter connected to the discharge side, and in the case of a suspended oil supply system, piping vibration increases, causing large noise. Piping vibration also causes vibration and noise in the filling station building.

Therefore, it is possible to install a shock absorber to prevent pulsation pressure in the middle of the discharge pipe, but it is necessary to manage the replacement period in consideration of the lifespan of this shock absorber, which makes management and handling troublesome. becomes.

The present invention was developed in view of the above-mentioned problems, and by installing a buffer for preventing pulsation pressure inside the oil spill pipe installed in the filter, which is replaced within a certain period of use, it increases the number of management items in the gas station. The present invention is characterized in that the generation of pulsating pressure on the discharge side of the pump can be prevented without causing any problems, thereby preventing various adverse effects caused by pulsating pressure.

The illustrated embodiments will be described in detail below.

Fig. 1 shows a suspended type oil supply system, in which a pump (for example, a vane pump) 2 is installed inside the main body 1 of the system.
A motor 3 for driving the pump 2 is installed, and the suction side of the pump 2 is connected to an underground tank (not shown) via a pipe 4, and an oil liquid (for example, gasoline) is stored in the underground tank. . pump 2
A filter container 6 is attached to the discharge side of the filter via piping 5, a flow meter 8 is attached to the outlet side of the filter container 6 via piping 7, and piping 9 is connected to the outlet side of the flow meter 8. This pipe 9 is connected to a refueling hose 11 within a hose lifting device 10 installed at a high location of the refueling station (e.g., a ceiling, a canopy, a beam, etc.). A refueling nozzle 12 is attached to the refueling hose 11.

An air separator 14 is connected to the filter container 6 via a pipe 13, and a pipe 15A for returning only the oil liquid to the suction side of the pump 2 is connected to the bottom of the separator 14. A relief pipe 15B for air relief is attached to the upper part of the container 14.

As shown in FIG. 2, a lid 16 that closes the opening of the filter chamber 6A is screwed to the filter container 6, and a filter 17 is accommodated in the filter chamber 6A so as to be removable. The filter 17 has an oil outflow pipe 18 connected to the outflow port 6B of the filter container 6, and a over-element 19 attached to the outer periphery of the oil outflow pipe 18. The over-element 19 is made of folded paper or cloth material as shown in FIG.
1 is fixed. A plurality of oil inflow holes 18A are formed in the wall of the oil outflow pipe 18.

A rubber bag 22 as a shock absorber for preventing pulsation pressure is accommodated in the oil outflow pipe 18 . Air is sealed inside the rubber bag 22.

In the above embodiment, when the pump 2 is activated to start refueling, the oil in the underground tank is sucked in from the suction side of the pump 2, and is discharged with pulse pressure from the discharge side of the pump 2 into the filter chamber 6A. be done.
In the filter chamber 6A, the oil liquid flows through the over-element 19.
After passing through, the oil enters the oil outflow pipe 18 through the oil inflow hole 18A. Since the rubber bag 22 is housed in the oil outflow pipe 18, the pulsation pressure of the oil is absorbed and alleviated by the change in the volume of the rubber bag 22. The oil whose pulse pressure has been absorbed and relaxed in this way is sent from the oil outflow pipe 18 through the outlet 6B of the filter container 6 to the flow meter 8, and further from the flow meter 8 through the piping 9 and hose 11 to the oil supply nozzle. It is discharged from 12. Therefore, damage to the flow meter 8 and vibration of the piping 9 due to pulse pressure are prevented.

The filter 17 is replaced within a certain period of use considering its lifespan. In this case, the lid 16 of the filter container 6 is removed, the filter 17 is taken out, and a new filter 17 is placed in the filter chamber 6A. Along with replacing this filter 17, the filter 1
Since the rubber bag 22 in the rubber bag 7 is also replaced periodically, there is no need to independently manage the replacement timing of the rubber bag 22. As described above, since the rubber bag 22 can be replaced together with the filter 17, it is economical to set the lifespan of the rubber bag 22 to match the lifespan of the filter 17.

Although one embodiment has been described above, the present invention is not limited to the above embodiment, and includes, for example, the following modifications.

The pump may be a pump other than a vane pump.

The filter chamber may be formed within the casing of the pump.

The filter material may be of a known form other than the above embodiments.

The oil spill pipe may be a tubular body made of wire mesh.

If the shock absorber for preventing pulse pressure is a rubber bag, it will be very inexpensive, but the shock absorber for pulse pressure prevention may be in any form other than a rubber bag as long as it can absorb pulse pressure.

A stopper member may be provided in the oil outflow pipe to prevent the pulsation pressure prevention buffer from being pushed upward. As the stopper member, for example, an annular ring, a wire mesh partition plate, etc. can be used.

The refueling device is not limited to a suspended refueling device, and may be a fixed (ground-mounted) refueling device.

As is clear from the above description, the present invention allows a filter having an oil liquid outflow pipe and a super-element attached to the outer periphery of the oil liquid outflow pipe to be inserted into and taken out of the filter chamber provided on the discharge side of the pump. accommodated in
Since the pulsation pressure prevention buffer is provided in the oil fluid outflow pipe, various adverse effects caused by the pulsation pressure of the discharged oil can be prevented, and the pulsation pressure prevention buffer can be replaced together with the filter. If the filter replacement timing is managed, the pulsation pressure prevention buffer will also be replaced automatically on a regular basis, making it possible to prevent an increase in the number of management items within the gas service station.

[Brief explanation of the drawing]

FIG. 1 is a schematic longitudinal cross-sectional view of a suspended oil supply device showing an embodiment of the present invention. FIG. 2 is a longitudinal sectional view of the filter container in the oil supply device of FIG. 1. FIG. 3 is a sectional view taken along line A-A in FIG. 2. 2...Pump, 6A...Filter chamber, 17...
Filter, 18... Oil outflow pipe, 19... Over-element, 22 Rubber bag (buffer for preventing pulse pressure).

Claims (1)

[Scope of utility model registration request] A filter having an oil liquid outflow pipe having an oil liquid inflow hole formed in the peripheral wall and a super-element attached to the outer periphery of the oil liquid outflow pipe is removably housed in a filter chamber provided on the discharge side of the pump. . An oil supply device comprising a pulsation pressure prevention buffer provided in the oil liquid outflow pipe.