JPS627364Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present application relates to a fuel filter equipped with a water level detection means and a separated water discharge means.

A fuel filter is a filter element disposed within a casing and is used to filter fuel from an internal combustion engine. Such a fuel filter is provided with means for separating and discharging moisture contained in the fuel. Water separation is performed by a water repellent material or an inertial separation structure, and drainage is performed by a drain plug provided at the bottom of the casing. Further, the fuel filter is provided with water level detection means for detecting the water level of the separated water and means for notifying the state that the water level has reached a predetermined level.

A conventional fuel filter is known in which a water level detection means is provided at the center bottom of the casing, and drainage means such as a drain plug is separately provided at the bottom around the water level detection means. Furthermore, a simpler structure was developed in 1975, by integrating the water level detection means and the discharge means.
- Shown in Publication No. 102916. however,
A filter having such a structure has the following drawbacks. That is, when draining water by manually operating a drainage means such as a drain plug, the drained water that flows out will stain the operator's hands. Furthermore, when the drainage means is rotated to drain water, the water level detection means also rotates at the same time, which impedes smooth drainage work.

In view of the above, the present application provides a fuel filter having a structure in which a water level detecting means and a draining means are integrated, and which enables a draining operation without overflowing the drained water to the outside.

To describe an embodiment, FIG. 1 shows a fuel filter 10 of the present invention, which is composed of a filter body 1 and a drainage means 2. As shown in FIG. The filter body 1 includes a filter element 4 inside a cup-shaped metal casing 3.
The upper end of the casing 3 is closed with a lid 5. The lid body 5 consists of a reinforcing plate 8 having a screw hole 6 in the center and a plurality of openings 7 around the reinforcing plate 8, and a shroud plate 9 in contact with the reinforcing plate 8.
It is caulked to the outer edge of the upper end. The drainage means 2 consists of a water level detection section 11 and a drainage section 12, as shown in FIG. The water level detection unit 11 includes a cylindrical base 1 made of resin.
It has a pillar 14 standing upright in the center of one side of 3, and has an opening groove 15 in the center of the other side. Inside the column 14,
A metal detection body 16 is buried, and its upper end is exposed above the column 14. A cord 18 having a contact 17 at its tip is written in the center of the opening groove 15 of the base 13, and a connecting body 19 connecting the contact 17 of the cord 18 and the sensing body 16 is provided on the outer peripheral surface of the cord 18. provided. Furthermore, a protector 20 is disposed around the outer periphery of the connecting body 19. The cord 18, the connector 19 and the protector 20 are made of a filling material 2 such as epoxy resin.
1 is integrally fixed. 22 is a thread groove. The drainage part 12 has a cylindrical part 2 having a central opening 23.
4 and a communication pipe 25 connected to the cylindrical portion, and the inside of the communication pipe communicates with the central opening 23. Inside the communication pipe 25, there is a large diameter portion 27 provided with a thread groove 26 and an inclined portion 2.
It has a small diameter portion 29 that is connected via a diameter 8. Also,
A drain pipe 30 is provided on the lower outer surface of the communication pipe 25, one end of which opens near the inclined portion 28 within the communication pipe 25, and the other end opens to the atmosphere. Communication pipe 2
A valve body 31 is inserted into the interior of the valve body 5 . The valve body 31 has a large diameter portion 33 having a thread groove 32 in the center.
It consists of a rod with small diameter parts 34 on both sides,
The large diameter portion 33 is screwed into the large diameter portion 27 within the communication tube 25, and the small diameter portion 34 at the tip is inserted into the small diameter portion 29 within the communication tube 25. Small diameter portion 34 of valve body 31
An “O” ring 35 is disposed between the small diameter portion 29 of the communication pipe 25 and the small diameter portion 29 of the communication pipe 25. 36 is a handle of the valve body 31. The columnar body 14 of the water level detection unit 11 is
It is inserted into the central opening 23 of the drainage part 12 and the two are integrated. 37 and 38 are "O" rings.

The drainage means 2 as described above is screwed into a screw hole provided at the bottom of the casing 3 of the filter body 1.
The inside of the casing 3 and the central opening 23 of the drainage section 2 are as follows:
The communication holes 39 communicate with each other. A drain hose (not shown) is connected to the drain pipe 30 and extends to, for example, outside the engine room. The fuel filter 10 is used with a predetermined voltage applied between the detection body 16 of the water level detection section 11 and the casing 3. Fuel flows into the casing 3 through the opening 7 of the lid 5, flows through the filter element 4, and flows out from the screw hole 6 of the lid 5. Water droplets dispersed in the fuel are separated by inertia or by a water repellent provided on the filter element 4 when the flow path is reversed, and are separated and deposited on the bottom of the casing 3. As the separation progresses and the water level of the separated water rises and reaches the upper end of the water level detection unit 11, the casing 3 and the detection body 16
electrically conducts through the water, activating an alarm (not shown). In this state, when the handle part 36 is operated to rotate the valve body 31 and move the valve body 31 to the right, the drain pipe 30 and the inside of the casing 3 are communicated through the central opening 23, and the separated water is transferred to the drain pipe 3.
0 and is discharged outside the engine room. When the water level inside the casing 3 falls, the valve body 31
Move to the left to block the waterway. When the filter element 4 reaches a predetermined clogging state, the drainage means 2
is removed from the filter body 1, and the filter body 1 is removed from the filter body 1.
will be discarded only.

As described above, the fuel filter of the present invention has a draining means that integrates a water level detection means and a draining means, and the draining means is equipped with a drain pipe equipped with a valve body. To prevent water from overflowing outside the drainage means and staining the operator's hands. Furthermore, since the valve body and the water level detection means do not rotate together when the valve body is rotated, the fear that the water level detection means will come off the filter during drainage operation is eliminated.

[Brief explanation of the drawing]

FIG. 1 is a sectional view of the fuel filter of the present invention, and FIG. 2 is a sectional view of the drainage means. 1... Filter body, 2... Drainage means, 11...
...Water level detection section, 12...Drainage section.

Claims (1)

[Scope of utility model registration request] A column is erected at the center of one side of a resin cylindrical base, and a water level detection section is formed by embedding a detection body with the upper end exposed in the column, and a communication pipe is attached to the side of the tube having a central opening. A drain pipe is provided at the bottom of the communication pipe, a valve body is inserted into the communication pipe, and the valve body opens and closes between the center opening and the drain pipe. A fuel filter in which a drainage means inserted into the fuel filter is screwed onto the bottom of a casing of a filter body in which a filter element is disposed within a metal casing, thereby communicating the inside of the casing with the central opening.