JPS6023509Y2 - Fuel pipe drain device - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a drain device for a substantially U-shaped fuel pipe that connects a fuel tank, a carburetor, a fuel pump, etc. in a small general-purpose engine, etc.

Conventionally, fuel filters with a settling tank have been widely used, but the air in the filter cannot escape to the fuel tank or carburetor, which may cause paper lock.As a countermeasure to this problem, as shown in Figure 1, A system is beginning to be adopted in which the joint 2 of the fuel tank 1 and the joint 4 of the carburetor 3 or fuel pump are connected by a fuel pipe 5 that is piped in a substantially U-shape, thereby eliminating the conventional fuel filter.

If dirt or water accumulates at the bottom of the U-shaped fuel pipe 5, to drain it, either pull the fuel pipe 5 out of the fitting 2.4, or if the fuel fitting itself is removable as shown in Figure 2. removes it and drains it.

In FIG. 2, 6 is a pipe joint, and 7 is a joint bolt.

However, when the methods shown in FIGS. 1 and 2 are adopted, it takes time and effort to attach and detach the fuel pipe 5 to the joints 2 and 4.

Further, a tool is required to attach and detach the joint port 7 shown in FIG. 2, which is also time-consuming.

The present invention solves the above-mentioned conventional problems and also strengthens the weakest bottom part, which is most likely to bend when the fuel pipe is arranged in a U-shape. The upper ends of the transparent fuel pipes are connected in a U-shape, and the lowest part of the fuel pipe is equipped with an arc-shaped connecting pipe that opens upwards to prevent the fuel pipe from bending.The central lower part of the waist connecting pipe can be opened and closed from the atmosphere. The fuel cock is equipped with a fuel cock, and an embodiment thereof is shown in FIG. 3 and below.

Figure 3 shows a case where a manual cock or stopper is installed near the bottom of the 0-shaped pipe, and the fuel pipe 9, which is piped in a U-shape, is made of a transparent material (for example, vinyl).
The bottom part is cut off and fitted and fixed to both ends of the resin or metal connecting pipe 10.

A discharge pipe 11 branches downward from the middle of the connecting pipe 10, and there is a cock 12 at the lower end of the discharge pipe 11 that can be opened and closed without a tool.
Alternatively, a stopper using screws can be attached.

The illustrated fuel pipe 9 is made of a transparent vinyl pipe, so if dirt or water accumulates at the bottom of the pipe 9 while the engine is running, this can be confirmed at a glance.
In that case, stop the engine, place a suitable container under the cock 12, open the cock 12, and discharge the dirt and water accumulated at the bottom of the 0-shaped pipe downward from the cock 12 along with some of the fuel. After confirming that the garbage and water are gone, the cock 12 is closed.

Due to the position of the joint at the top of the 0-shaped piping, the width L1 of the 0-shaped piping
If sufficient strength cannot be secured, the bottom of the zero-shaped piping becomes the weakest part that is likely to bend due to the action of gravity on the fuel pipe and the fuel inside, but the connecting pipe 10 plays the role of reinforcing the weakest bottom of the zero-shaped piping. , it is possible to prevent bending of the fuel pipe.

If the bottom of the connecting pipe 10 is shaped in advance into an arc shape with a small radius of curvature R, as shown at 10' in Fig. 4, even if the width of the U-shape is narrow, the radius of curvature of the fuel pipe near the connecting pipe can be adjusted. This allows the fuel pipe to be kept large, and bending of the fuel pipe can be more reliably prevented.

As explained above, in the present invention, the upper end of the transparent fuel pipe 9, which is piped in a substantially U-shape, is connected to the downward joint 2 of the fuel tank 1 and the downward joint 4 of the fuel system device such as a carburetor, fuel pump, etc. An upward-opening arc-shaped connecting pipe 10' for preventing bending of the fuel pipe is interposed at the lowest part of the fuel pipe 9, and a fuel cock 12 which can be opened and closed to the atmosphere is provided at the lower center of the connecting pipe 10'. The following special effects can be obtained.

In other words, when the width L1 of the 0-shaped pipe cannot be sufficiently secured due to the position of the joint 1°4 at the upper end of the 0-shaped pipe, the bottom of the 0-shaped fuel pipe 5 is the weakest part that is likely to bend due to the action of gravity of the fuel inside. However, since the connecting pipe 10' serves to reinforce the weakest bottom part of the zero-shaped pipe, bending of the fuel pipe can be prevented.

In particular, since the connecting pipe 10' is formed in advance into an upwardly opening arc shape with a small radius of curvature as shown in Fig. 4, even if the width L1 of the U-shape is narrow, the radius of curvature of the fuel pipe near the connecting pipe can be adjusted. This allows the fuel pipe to be kept large, and bending of the fuel pipe can be more reliably prevented.

Further, since the fuel cock 12 is attached to the lower center of the connecting pipe 10', it can be easily operated by hand while freely adjusting the opening degree, and opening and closing can be performed reliably.

In other words, when it is confirmed that dirt or water has accumulated in the fuel pipe, stop the engine, place a suitable container under the cock 12, open the cock 12, and remove the dirt or water that has accumulated at the bottom of the zero-shaped pipe. The water may be discharged downward from the cock 12 along with some of the fuel, and the cock 12 may be closed after confirming that there is no dirt or water.

Moreover, since the cock 12 is located at the lowest point, the amount of fuel discharged together with dirt and water can be minimized, thereby preventing fuel waste.

Further, as mentioned above, the ejection operation can be easily performed without any tools, so it does not take much time.

[Brief explanation of drawings]

Fig. 1 is a front view showing an example of conventional zero-shaped piping, Fig. 2 is a sectional view showing an example of a joint structure that can be attached and detached using a tool, and Fig. 3 is a sectional view of the main part of the drain device according to the present invention. FIG. 4 is a front view of a single connecting tube that can be used in place of the connecting tube in FIG. 3. 9.15...Fuel pipe, 12,14...
...cock and hole (fuel outlet).

Claims (1)

[Scope of utility model registration request] The upper end of a transparent fuel pipe 9 piped in a substantially U-shape is connected to the downward joint 2 of the fuel tank 1 and the downward joint 4 of the fuel system device, and the upper end of the transparent fuel pipe 9 is connected to the lowest part of the fuel pipe 9 to prevent the fuel pipe from bending. A fuel pipe drain device characterized in that a fuel cock 12 which can be opened and closed to the atmosphere is provided at the lower center of the arc-shaped connecting pipe 10'.