JPH0229249Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Field of Application) This invention relates to a fuel filter for vehicles, which is mainly equipped with a roll-type filter element.

(Prior Art) A fuel filter using a roll-type filter element, which is widely used at present, is shown in Fig. 3, in which a bead portion recessed inward at the center of the peripheral wall of a pot-shaped container 1 made of an iron plate is shown. 1a, and engage the peripheral edge of the porous annular end plate 2 to arrange the end plate 2 in the container 1.Meanwhile, the paper 4 folded in half around the center pipe 3 is spirally folded with the fold facing up. The adjacent parts of the lower edge are glued together to form a over-element e, which is inserted into the container 1 from above and the lower end of the center pipe 3 is fitted into the inner peripheral edge of the end plate 2 to stand up. At the open end of the container 1, there is provided a thick sheet plate 5 having a screw in the center for attaching an extraction pipe 9 and a plurality of intake holes 5a around the thick sheet plate 5, and a cover plate 6 for caulking this to the container 1. A thick threaded boss 7 is brazed to the lower surface of the opening in the center of the bottom wall of 1, and a blocker 8 is attached to the boss 7 to which a separated water level detection sensor S and a plug 8a are attached. is screwed in.

A filter with this purpose was developed in 1983.
This is shown in Publication No. 114873.

(Problem to be solved by the invention) The conventional fuel filter is a disposable type in which the filtration element e is disposed in the container 1 so as not to be replaced, and the filtration element e is of the so-called type as described above. Since it is a roll type, the following problems arise. That is, in the roll type filtration element e, fluid flows from one end to the other end, so a large fluid pressure acts on the outflow end. Therefore, a large fluid pressure acts on the outflow side end. Therefore, the filter element e tends to move toward the downstream side. On the other hand, the filtration element e needs to have its inner and outer peripheries liquid-tightly sealed with the outer periphery of the center pipe 13 and the inner periphery of the container 1, but if such movement occurs, the sealing performance will deteriorate. . Moreover, in a disposable type, the state of the filter element e cannot be controlled from the outside, so it is extremely difficult to maintain the filter element e in a predetermined state within the container for a long period of time.

In the case shown in FIG. 3, the filtration element e is simply held by the bead portion 1a provided on the container 1, so it is difficult to prevent the filtration element e from moving and obtain a reliable sealing effect.

(Means for solving the problem) A fuel in which a roll-type filtration element is arranged in a pot-shaped container having an open end, a sheet plate and a cover plate are applied to the open end, and the cover plate is caulked to the container. In the filter,
A small diameter cylindrical part is provided in the bottom wall opening provided in the bottom wall of the container, and in this small diameter cylindrical part, a thick boss part and a leg cylinder part of the required height with a plurality of elongated holes around the periphery, and a leg cylinder part of the required height at the upper end thereof. The support is erected on the bottom of the container by fitting the boss part of the support, which is integrally formed with a porous annular end plate that spreads horizontally, and a roll-type filtration element is placed on the end plate of the support. In addition, a blocker equipped with a water level detection sensor was attached to the boss.

(Function) When fuel flows into the container from above, it flows downward through the fuel filtration element, is filtered, and flows to the bottom of the container, then passes through the long hole of the support, ascends the center pipe, and exits the take-out pipe. The water that is separated from the fuel during this process collects at the bottom of the container, and when it reaches a certain level, a water level detection sensor is activated and the driver is notified.

Fluid pressure is applied to the filtration element in the direction of fuel flow, but the filtration element is supported by the end plate of the support body fitted into the small-diameter cylindrical portion of the bottom wall opening of the container, thereby preventing deformation.

(Embodiment) An embodiment of this invention will be described with reference to FIGS. 1 and 2. Reference numeral 11 is a pot-shaped container made of iron plate, and the peripheral wall is flat without a bead in the middle. A small-diameter cylindrical portion 11a having a required height and having a horizontal inward flange 11b at the lower end is integrally formed in the bottom wall opening and protrudes downward. The lower end boss portion 12a of the body 12 is tightly fitted, and the support body 12 is erected within the lower half of the container 11. As shown in FIG. 2A, this support body 12 has a thick boss portion 12 at the lower end, which has an outer diameter slightly larger than the inner diameter of the small diameter cylindrical portion 11a of the container 11 and has a female thread on the inside.
a, a leg cylinder part 12b that stands up from the inside to almost the center of the container 11 and has a plurality of wide elongated holes 12d around it; almost coincides with the inner peripheral part 12e
is integrally formed with an annular porous end plate 12c that projects slightly conically, and on top of the end plate 12c, a piece of paper 14 folded in half around the center pipe 13 as described above is placed with the fold side facing up. The over-element e, which has been spirally wound and whose lower edges are glued together, is placed with the lower end of the center pipe 13 fitting into the inner circumferential part 12e of the end plate, and the opening of the container 11 is placed so that it can be taken out at the center. A thick sheet plate 15 having a thread into which a pipe 19 is to be screwed and a plurality of intake holes 15a around the thick sheet plate 15, and a container 1.
1 is provided with a cover plate 16 which is caulked.

On the other hand, the boss 12a of the support 12 is equipped with a water level detection sensor S of a required height (the illustrated one is based on a reed switch and a float, but it may also be based on an electrode, etc.) and a blockage 18a. The body 18 is screwed.

When using the container 11, the center pipe 19 is screwed onto the center screw of the seat plate 15.
is attached to the engine bracket, and the through hole in the bracket and the small intake hole 5a of the seat plate 15 are
When fuel (light oil) is allowed to flow into the container 11 through the filter element e, the fuel is purified while descending within the filter element e and exits to the bottom side, and passes through the long hole 12d of the support leg cylinder portion 12b into the center pipe. Rise within 13,
It is supplied to the engine via the take-out pipe 19.

Meanwhile, the water separated from the fuel accumulates at the bottom of the container, and when it reaches a certain level, the water level detection sensor S is activated and the driver is notified. is discharged.

Note that the inner circumferential portion 1 of the porous end plate 12c of the support body 12
If 2e is extended upward by a required length as shown in FIG. 2B and used also as the center pipe of the over-element e, the interior parts can be integrated into one, which is even more convenient.

(Effect of the invention) As described above, in the present invention, the filtration element is supported by the end plate of the support fitted to the small-diameter cylindrical part of the opening of the bottom wall of the container. Even if it is a disposable type, it can provide good sealing performance.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of an embodiment of this invention. FIG. 2A is a sectional view of the support portion. Figure B is a sectional view of a modified example of the support. Figure 3 is a cross-sectional view of the conventional product. In the figure, 11...container, 11a...small diameter cylinder part, 11b
...Inward flange, 12... Support body, 12a... Boss portion, 12b... Leg tube portion, 12c... End plate, 12d... Long hole, 13... Center pipe, 14... Paper, 15...
Seat plate, 16...Cover plate, 18...
Obstruction body, 18a...Kotuku.

Claims (1)

[Scope of utility model registration request] A fuel filter in which a roll-type filtration element is disposed in a pot-shaped container having an open end, a sheet plate and a cover plate are applied to the open end, and the cover plate is caulked to the container,
A small diameter cylindrical part is provided in the bottom wall opening provided in the bottom wall of the container, and in this small diameter cylindrical part, a thick boss part and a leg cylinder part of the required height with a plurality of elongated holes around the periphery, and a leg cylinder part of the required height at the upper end thereof. The support is erected on the bottom of the container by fitting the boss part of the support, which is integrally formed with a porous annular end plate that spreads horizontally, and a roll-type filtration element is placed on the end plate of the support. The fuel filter is equipped with a blocker equipped with a water level detection sensor on the boss.