JPH0230722B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION A flow path switching device using a conventionally known inverted conical stopper is used to open and close the flow path of a filter for pressurized fluid, especially mineral oil containing impurities such as fuel oil and lubricating oil. In order to maintain airtightness when switching, wire packing is filled between the top of the stopper and the stopper box, and pressure is applied using the screw cap provided on the stopper box, but if the pressure is too strong, the stopper will close. It is difficult to rotate the body, and if it is weak, the fluid will leak, and especially if foreign matter in the oil adheres to the conical surface, the stopper will become even more difficult to rotate, making it difficult to use as a switching device for pressurized mineral oil. It was hot.

In the past, various improvements have been made in an attempt to eliminate this drawback, but the devices are complicated, costly, and inconvenient to operate, which has become a bottleneck at present, when there is a particular demand for rationalization of product costs.

The present invention aims to eliminate such difficulties by significantly simplifying the retaining mechanism of the stopper, and to provide a device of this kind that has excellent features such as easy processing and extremely simple operation. Two filter tubes 1 and 2 for fuel of a marine internal combustion engine shown in the drawing.
To explain the case where it is used as a flow path switching device between
A plug body 5 made of
The stopper box 7 has a stopper housing chamber 1 consisting of a cap plate 21 and a cover plate 21.
7, a fluid passage hole (not shown) communicating with the filtration cylinder 2, a fluid inlet hole 18, and an extraction hole 19, by rotating the handle 12 fixed to the rotating shaft 8 of the plug body 5 by about 120 degrees. It is formed so that it can be switched between the filter cylinders 1 and 2. An annular groove 1 is formed above the through hole 3 of the plug body 5, and a resilient filling ring 1 such as an O-ring is inserted into the annular groove 1 above the through hole 3 of the plug body 5.
The cover plate 2 is inserted into the cover plate 2 and is made to protrude laterally to maintain the airtightness of the conical contact surfaces 4 and 6.
Structure 1 can be easily created. However, in the known structure, the wire packing maintains airtightness between the stopper and the stopper box, and at the same time prevents the inverted conical stopper from coming out due to fluid pressure applied from below. This structure prevents the plug from being pulled out and holds it in a fixed position.That is, the horizontal rod 9 to which the horizontal rod 9, which crosses the rotating shaft 8 that projects upward from the plug box 7 in a direction perpendicular to the rotating shaft 8, is attached to the rotating shaft 8. The vertical position can be adjusted by threading nuts 11, 11' through two stud bolts 10, 10' which are screwed in at appropriate distances from each other. Next, a pressing member a is interposed at the intersection of the horizontal rod 9 and the end of the rotating shaft 8. The pressing member a is formed so as to be adjustable in the vertical direction, and presses the end of the rotating shaft 8 to press the stopper 5.
The tightness between the sliding surfaces 4 and 6 of the stopper box 7 is adjusted appropriately, that is, the overhang of the O-ring 13 maintains airtightness, and at the same time, the stopper 5 is held so that it can be easily rotated. . An example of an adjustment mechanism in the vertical direction using the pressing member a having such an effect is shown in FIG.
0', and the vertical position can be adjusted by adjusting the upper and lower nuts 11, 11'.A steel ball 14 is inserted into the intersection of the rotating shaft 8 end and the horizontal rod 9, and above the steel ball 14, the horizontal rod is inserted. Screw the adjustment bolt 15 into the steel ball 1.
4 and the steel ball 1 is moved in and out by the adjusting bolt 15.
It is formed so that the pressure of step 4 can be finely adjusted. That is, in this configuration, the horizontal rod 9 has nuts 11,1
1' to adjust the opening of the sliding surfaces 4, 6 to a certain degree, and then finely adjust the bolt 15 to effectively achieve airtightness of the sliding surfaces 4, 6 by the O-ring 13. It is. The one shown in Fig. 6 shows one in which pipes 20, 20' are used except for one and a half of the nuts 11, 11', and the fourth
The figure shows a structure in which a steel ball 14 is used as the pressing member a, but in this structure, the pressing force is adjusted exclusively by vertical adjustment of the horizontal rod 9. Also the fifth
As shown in the figure, the steel ball 14 may be omitted and the adjusting bolt 15 may be provided as the pressing member a. In this configuration, the nut 1
1 and 11', the position of the horizontal rod 9 is roughly determined, and the pressing force is finally finely adjusted by moving the bolt 15 in and out.

As described above, in the present invention, the holding mechanism for the stopper 5 is provided protrudingly from the upper part of the stopper box 7, so that only the stopper 5 is accommodated in the stopper housing chamber 7, and the structure is different from that of known devices. Easy to keep clean. Pressure force adjustment can be done externally, so handling is easy.

In the present invention, the plug body 5 is prevented from pulling out by the horizontal rod 9, so the structure is simple, and the handle 12 is connected to the rotating shaft 8 by contact points with a small area such as steel balls 14 and bolts 15. Not only can it be operated easily, but it can also be controlled easily even if the horizontal rod 9 is slightly tilted.

In the present invention, since the horizontal rod 9 covers the upper part of the rotating shaft 8, there is no drawback that it will cause trouble even if it is stepped on when used for a ship.

In the present invention, the left and right stud bolts 10, 10' can be used as abutments for the handle 12, so the structure can be made simpler and the cost can be reduced accordingly, which is an invention with great practical effects.

[Brief explanation of drawings]

Fig. 1 is a sectional view showing an embodiment of the present invention; Fig. 2 is a partially cutaway front view; Fig. 3 is a plan view; Figs. 4 to 6 show main parts of other embodiments. FIG. 3...Fluid hole, 4...Truncated inverted conical surface, 5...
...Plug body, 6... Inverted conical hole, 7... Plug box, 8...
Rotating shaft, 9... Horizontal rod, 10, 10'... Stud bolt, 11, 11'... Nut, 12... Handle, 1
3...O-ring or other elastic filled ring, 14...Steel ball,
15... Adjustment bolt, A... Annular groove, B... Plug housing chamber, 21... Lid plate, a... Pressing member, 20,
20'...Pipe, 17...Fluid hole, 18...
Fluid inlet hole, 19...extraction hole.

Claims (1)

[Scope of Claims] 1. In a device that opens, closes, and switches a flow path by rotating a truncated cone-shaped plug by a required angle, the rotation axis of the plug is made to protrude from a plug box and intersect at right angles to the rotation axis. A pressurized fluid flow path switching device comprising a horizontal rod that is vertically adjustable and attached to a stopper box, and a pressing member that is formed at the intersection of the horizontal rod and the rotating shaft so as to be vertically adjustable. Retaining mechanism for the stopper. 2. The pressurized fluid flow path switching device according to claim 1, characterized in that an adjustment bolt is screwed into the horizontal rod as the pressing member, and a steel ball is interposed between the adjustment bolt and the end of the rotating shaft. Stopper retention mechanism. 3. A plug holding mechanism in a pressurized fluid flow path switching device according to claim 1, characterized in that a steel ball is interposed between the horizontal rod and the rotating shaft end as a pressing member. 4. A plug holding mechanism in the pressure fluid flow path switching device according to claim 1, characterized in that an adjustment bolt is screwed into the horizontal rod as a pressing member between the intersection of the horizontal rod and the end of the rotating shaft. .