JPH028704Y2 - - Google Patents

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a jig for attaching and removing a valve seat and a valve seat holder used in a rotary valve.

[Conventional technology]

As shown in FIG. 3, the rotary valve 20 includes flanges 21a and 21b on the inlet and outlet sides, a cylindrical valve body 21 with an opening at the top, a spherical or truncated conical valve body 22a, and a cylindrical valve body 21 having an opening at the top. A valve body assembly 22 consisting of a shaft 22b for rotating the valve body 22a and a rib 22c connecting the shaft 22b and the valve body 22a.
and a lid body 2 on the top of the valve box 21 to close the opening.
3, and a drive section 24 provided on the top of the lid body 23 for rotating the shaft 22b of the valve body assembly 22. A ring-shaped valve seat 26 is fixed to the inside of the outlet side flange 21b of the valve box 21 by screwing a ring-shaped valve seat holder 25, and when the valve is closed, the valve seat 26 is attached to the valve seat 26. The valve body 22a of the body assembly 22 is configured to shut off water by coming into close contact with the body assembly 22.

This valve seat 26 becomes worn due to long-term use and needs to be replaced if water leaks even when the valve is closed.

[Problem that the invention attempts to solve]

Conventionally, in order to replace the valve seat 26, a screwdriver or the like was applied to the concave or convex part provided in the valve seat holder 25, and then hit with a hammer or the like. Or there was a risk that the convex part would be deformed or damaged.

Furthermore, a cylindrical jig 27 as shown in FIG.
That is, a convex portion or a concave portion 27a that is fitted into a concave portion or a convex portion of the valve seat holder 25 is provided at one end edge, and a concave portion 27 in which the rotating handle 28 is fitted to the other end edge.
However, since this jig 27 must be operated by inserting it into the opening on the inlet side of the valve box 21, when removing the valve seat 26 and the valve seat retainer 25, the jig 27 must be rotated. Valve 20 had to be removed from the piping.

This invention was devised in view of the above points, and is a valve seat mounting/removal jig that allows the valve seat holder and valve seat to be attached and detached from the opening at the top of the valve box, eliminating the need to remove the rotary valve from the piping. Our goal is to provide the following.

[Means for solving problems]

In order to solve the above-mentioned problems, in the present invention, a ring-shaped valve seat 26 is provided inside the outlet of the valve body 21 and is screwed into a stepped portion having a larger diameter than the outlet.
Alternatively, in order to attach and detach the valve seat holder 25 from the opening in the upper part of the valve box 21, a male thread 2a of the same pitch as the above screw is carved on the outer periphery of the cylindrical part 2b, and formed on the side edge of the valve seat 26 or the valve seat holder 25. concave or convex portion 25a
The convex portion or concave portion 2c that engages with the cylindrical portion 2b
A polygonal rod 3 is provided on the flange 2d projecting from the outer periphery and transmits rotational force to the convex portion or concave portion 2c.
a main body 2 provided with a boss portion 2e that is telescopically and fixably engaged with the cylindrical portion 2b;
A guide female thread 4 is provided on a bolt 4b fixed to the outlet of the valve box 21, and a female thread 4a is formed to be screwed into the male thread 2a on the outer periphery of the cylindrical portion 2b.
It is characterized by comprising a wrench 5 which can apply rotational force to the polygonal rod 3 engaged with the boss portion 2e of the main body 2 through an opening at the top of the valve box 21.

By employing the above configuration, the valve seat or the valve seat holder can be attached and detached from the opening in the upper part of the valve box.

〔Example〕

An embodiment of the present invention will be described in detail below with reference to the drawings.

Figure 1 is a cross-sectional front view showing the state in which the valve seat attachment/removal jig of the present invention is attached to the valve seat of a rotary valve;
The figure is a side view of the valve seat attachment/removal jig.

Note that the same parts as in FIG. 3 are designated by the same reference numerals, and the description thereof will be omitted.

In FIG. 1, a stepped portion having a larger diameter than the outlet is formed inside the outlet of the valve body 21 of the rotary valve 20,
A ring-shaped valve seat 26 is fixed by threading a ring-shaped valve seat holder 25 which has a female thread cut into the stepped portion and a male thread. There are two or four symmetrical positions on the side edge of the valve seat holder 25.
A recess 25a is formed at the location.

Valve seat installation/removal jig 1 according to an embodiment of the present invention
In this case, a male thread 2a having the same pitch as the thread formed on the step part of the valve body 21 and the valve seat retainer 25 is attached to the cylindrical part 2b.
A convex portion 2 made of a bolt is carved on the outer periphery and engages with a concave portion 25a formed on the side edge of the valve seat holder 25.
c is provided on the flange 2d projecting from the outer periphery of the cylindrical portion, and the polygonal rod 3 transmits rotational force to the convex portion 2c.
The main body 2 is provided with a boss portion 2e that is extendable and retractable around the cylindrical portion 2b and that is fixedly engaged with the bolt 3a.
and a male thread 2a on the outer periphery of the cylindrical portion 2b of the main body 2.
A female thread 4a is formed to be screwed into the valve box 21.
It consists of a female guide screw 4 provided with a bolt 4b fixed to the inner surface of the outlet of the valve body 2, and a ratchet spanner 5 that applies rotational force to the polygonal rod 3 engaged with the boss portion 2e of the main body 2 from an opening at the top of the valve body 21. has been done.

With this configuration, the guide female screw 4 is fixed to the inner surface of the outlet of the valve box 21 with the bolt 4b, and the main body 2
The protrusion 2c provided on the flange 2d of the valve seat holder 25
By inserting the ratchet spanner 5 into the recess 25a and rotating the ratchet spanner 5 in the tightening direction, the threads formed on the valve seat retainer 25 and the stepped portion of the valve case 21, and the threads formed on the jig main body 2 and the female guide thread are tightened. Since the pitch is the same, the valve seat holder 25 can be easily attached because it moves the same distance per revolution. Further, the valve seat retainer 25 can be removed easily in the same way by reversing the direction of rotation of the ratchet spanner 5.

The valve seat mounting/removal jig of the present invention has a length determined by the jig body 2, the polygonal rod 3, and the stroke of the screw, so it can be made relatively short, and it can be made shorter than the opening at the top of the valve box 21. Ratchet spanner 5
The valve seat and valve seat holder can be attached and detached using the .

In this example, the case where the valve seat mounting/removal jig is used for a rotary valve has been explained, but it is of course applicable to any valve in which the valve seat or valve seat holder is screwed into the valve body. It is.

[Effect of idea]

As explained above, according to the valve seat installation/removal jig of the present invention, the valve seat or valve seat holder can be installed and removed from the opening at the top of the valve box using a ratchet spanner, and serviceability is improved and maintenance is maintained. It has excellent effects in this respect.

[Brief explanation of the drawing]

Figure 1 is a cross-sectional front view showing the state in which the valve seat attachment/removal jig of the present invention is attached to the valve seat of a rotary valve;
The figure is a side view of a valve seat attachment/removal jig, FIG. 3 is a partially cutaway perspective view of a rotary valve, and FIG. 4 is a perspective view of a conventional valve seat attachment/removal jig. 1...Valve seat installation/removal jig, 2...Main body, 2
a...male thread, 2b...cylindrical part, 2c...convex part,
2d...Trim part, 2e...Boss part, 3...Polygonal bar,
3a... Bolt, 4... Guide female thread, 4a...
Female thread, 4b...bolt, 5...ratchet spanner, 20...rotary valve, 21...valve box, 25...valve seat holder, 25a...recess, 26...valve seat.

Claims (1)

[Scope of utility model registration request] A ring-shaped valve seat 26 or a valve seat holder 25 screwed into a stepped portion with a larger diameter than the outlet inside the outlet of the valve body 21 is attached to and removed from the opening at the upper part of the valve body 21. Male screws 2a of the same pitch are carved on the outer periphery of the cylindrical portion 2b, and a convex portion or concave portion 2c that engages with a concave portion or convex portion 25a formed on the side edge of the valve seat 26 or the valve seat retainer 25 is attached to the cylindrical portion. The main body is provided with a boss part 2e provided on a collar part 2d protruding from the outer circumference of 2b, and with which a polygonal bar 3 for transmitting rotational force to the convex part or concave part 2c is telescopically and fixably engaged around the cylindrical part 2b. 2, a guide female thread 4 having a female thread 4a that is screwed into the male thread 2a on the outer periphery of the cylindrical portion 2b of the main body 2, and a bolt 4b that is fixed to the outlet of the valve box 21; The valve box 21 is attached to the polygonal rod 3 that is engaged with the boss portion 2e of 2.
A valve seat mounting/removal jig characterized by comprising a wrench 5 to which rotational force can be applied through an opening at the top.