JPH0415284Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to an improvement in an assembly device for a strainer that is assembled on the water supply port side of a valve box of a pressure reducing valve in combination with a valve body of a check valve mechanism installed there. .

As shown in FIG. 1, the strainer S in the pressure reducing valve is provided on the primary side of the check valve mechanism a installed on the water supply inlet 10 side of the valve box 1.
The purpose is to remove garbage from the tap water supplied from the system and eliminate the obstruction caused by the garbage flowing into the check valve mechanism a and the pressure reducing valve mechanism b,
Since the garbage accumulated during use gradually becomes clogged in the mesh, it is necessary to perform an inspection about once a month and clean and remove the accumulated garbage.

In addition, when assembling the check valve into the valve box 1 in a removable manner to facilitate inspection and cleaning work, as shown in FIG. The valve rod 30 of the valve body 3 of mechanism a is assembled and held, and a valve seat 31 facing the valve body 3 is installed on the upper end surface of the strainer holding frame 2, so that the check valve mechanism a is integrally assembled. In addition, in the valve box 1, a mounting hole 32 is formed in a partition wall that partitions the primary side and the secondary side to fit into the fitting part 20 provided on the outer periphery of the upper end of the strainer holding frame 2. A charging port 11 is provided in the bottom wall 1a of the valve box 1 at a portion facing the mounting hole 32, and the strainer holding frame 2 with the check valve mechanism a assembled is inserted through the charging port 11. A method of mounting is proposed by inserting the strainer, fitting the fitting part 20 on the upper end side into the mounting hole 32, and pressing the bottom of the strainer holding frame 2 with the blind lid 4 screwed into the charging port 11. has been done.

However, with this means, when the blind cover 4 is removed to take out the strainer S from inside the valve housing 1 for inspection and cleaning, the fitting part 20 at the upper end of the strainer holding frame 2 is inserted into the valve housing 1. By fitting into the provided mounting hole 32, the strainer holding frame 2 and the check valve mechanism a assembled thereto remain in the warped valve box 1, and can be removed from the charging port 11. There is a problem that the operation of extracting it to the outside becomes troublesome.

From this, the bottom of the strainer holding frame 2, which supports the strainer S and is assembled with the check valve mechanism a, is attached to the bottom wall 1a of the valve box 1, as shown in FIG.
Blind lid 4 screwed onto charging port 11 opened in
This is assembled integrally into the valve housing 1, and then inserted through the charging port 11 of the valve box 1. By screwing the blind cover 4 into the charging port 11, it is attached to the valve box 1 as shown in Fig. 4. Means have been developed to enforce this. However, with this method, when the blind cover 4 is removed, the strainer holding frame 2 that is integrally connected to the strainer holding frame 2 comes out together with the charging port 11, making it easier to take out the strainer S. Both the upper opening and the lower opening of the cylindrical strainer S are closed by the valve body 3 and blind lid 4 of the check valve mechanism a assembled to the strainer holding frame 2. Now, when cleaning the strainer S with washing water, it is started from the outside side where the dirt is attached, and the dirt is forced into the mesh of the strainer S, causing clogging. Therefore, there is a problem in that efficient cleaning cannot be performed by passing cleaning water from the inner surface of the strainer S to wash away dirt adhering to the outer surface.

The present invention was devised to solve the above-mentioned problems occurring in the strainer of a pressure reducing valve, and it is designed to facilitate the assembly of the strainer into the valve box and to take it out of the valve box. To provide a new means for easily cleaning a strainer without causing clogging.

In the present invention, as a means to achieve this purpose, a cylindrical strainer is held so as to form the circumferential wall of the body, a check valve mechanism is held on the upper surface side, and a check valve mechanism is held on the outer periphery of the upper end side inside the valve box. At the lower end of the strainer holding frame, which is equipped with a fitting part that fits into the mounting hole of A snap plate made of a spring plate is inserted into and pulled out freely into a recess formed on the top side of the blind lid that is screwed into the charging port formed on the bottom wall of the box, and is inserted into an annular groove formed on the inner wall of the recess. An apparatus for assembling a strainer in a pressure reducing valve is proposed, in which the distal end side of the sleeve plate of the stopper is positioned and fitted above the upper surface of the flange of the strainer holding frame.

Next, embodiments will be described in detail with reference to the drawings. Note that the same reference numerals in the drawings as in the previous means are used for constituent members having the same effect.

FIG. 5 is a longitudinal sectional front view of a pressure reducing valve A in which the present invention can be implemented, in which 1 is a valve box, a is a check valve mechanism provided in the valve box 1, S is a strainer, 2 is a strainer holding frame, 3 is the valve body of the check valve mechanism a, 4 is the blind lid,
b indicates a pressure reducing valve mechanism.

A water supply inlet 10 is installed on one side of the left and right sides of the valve box 1, and a water supply outlet 12 is installed on the other side. Further, the pressure reducing valve mechanism b is installed inside, the check valve mechanism a is installed on the primary side of the pressure reducing valve mechanism b, and the strainer is further installed on the water supply inlet 10 side of the check valve mechanism a. It is equipped with S.

The check valve mechanism a is mounted on the upper surface side of a cylindrical strainer holding frame 2 to which a cylindrical strainer S is attached.
A valve seat 31 is formed as shown in FIG. is supported by the strainer holding frame 2 so as to be able to move up and down freely, and is integrally assembled to the strainer holding frame 2 by being biased by a spring 33 to be drawn downward. Then, by fitting the fitting part 20 formed on the outer circumferential side of the upper end of the strainer holding frame 2 into the mounting hole 32 installed in the valve box 1 in a watertight manner,
When assembled into the valve box 1 and the pressure on the water supply inlet 10 side in the valve box 1 is higher than the pressure on the water supply outlet 12 side,
The valve body 3 is pushed up against the bias of the spring 33 and moves away from the valve seat 31, causing water on the primary side to flow to the secondary side, and the pressure on the water supply outlet 12 side becomes higher than that on the water supply inlet 10 side. When the valve body 3 comes into contact with the valve seat 31 due to the bias of the spring 33 and the pressure on the secondary side, the water on the secondary side is prevented from flowing back to the primary side.

The strainer holding frame 2 that holds the strainer S and is integrally combined with the check valve mechanism a is inserted through the charging port 11 that is opened in the bottom wall 1a of the valve box 1 so as to face the mounting hole 32. Insert and also
However, as shown in FIG. 7, the lower end of the strainer holding frame 2 is loosely inserted into the upper surface of the blind lid 4 that covers the charging port 11, as shown in FIG. A recessed portion 40 is formed, and a slit-shaped annular groove 41 is formed on the inner circumferential wall 40a of the recessed portion 40 at a position closer to the upper side.
A strainer S is attached to the lower end of the strainer holding frame 2.
A flange 21 is formed which protrudes in a shallow shelf shape in the outer circumferential direction from the outer circumferential surface of the strainer, and as shown in FIG. The sleeve plate 5 is bent into a substantially U-shape and extends outward from the lower edge of the opposing free end.
0,50 is formed, and when the lower end of the strainer holding frame 2 is inserted into the recess 40 of the blind lid 4, the snap stop 5 is attached to the strainer holding frame. 2, and the tips of the sleeve plates 50, 50 at the free ends are fitted into the annular grooves 41 formed in the inner wall surface 40a of the recess 40, and the strainer holding frame is attached to the sleeve plates 50, 50. The engagement of the upper surfaces of the two flanges 21 serves as a connection to prevent the strainer holding frame 2 from escaping from the recess 40.

That is, first, the lower end of the strainer holding frame 2 is inserted into the recess 40 of the blind lid 4, and from this state, the snap stopper 5 is pressed in the direction of closing the opposing free ends. At the same time, sleeve plates 50, 50, which are fitted onto the outside of the body of the strainer holding frame 2 and protrude outside the lower edge of each free end thereof, are attached to the upper surface of the flange 21 at the lower end of the strainer holding frame 2. When the snap stopper 5 is positioned above the
Push the lower edge side of the free end into the recess 40 of the blind lid 4, and insert the protruding ends of the sleeve plates 50, 50 of each free end into the recess 4.
By fitting into the annular groove 41 formed near the upper part of the inner wall surface 40a of 0, the state shown in FIG. 9 is obtained.
When the strainer holding frame 2 moves upward relative to the recess 40 of the blind lid 4, the sleeve plates 50, 50 of this snap stop 5 press the upper surface of the flange 21 of the strainer holding frame 2, and the strainer holding frame 2 is the recess 4 of the blind lid 4
It is connected so that it will not escape from 0.

The embodiment device constructed in this manner operates as follows.

When the strainer holding frame 2 with the strainer S attached is inserted into the valve box 1 and assembled, the lower end of the strainer holding frame 2 is covered with a blind lid 4 that covers the charging port 11.
Insert it into the recess 40 and prevent it from escaping with the snap stopper 5. In this state, insert it from the upper end side where the check valve mechanism a is assembled through the charging port 11, and The fitting part 20 of the mounting hole 32
The mounting is completed by fitting the blind cover 4 into the charging port 11.

In this state, the force pushing up the strainer holding frame 2 due to the water pressure applied to the check valve mechanism a from the primary side is applied to the annular groove 41 of the blind lid 4 screwed into the charging port 11 of the bottom wall 1a of the valve box 1. The sleeve plates 50, 50 of the fitted snap stopper 5 receive and support the flange 21.

Next, when inspecting or cleaning the strainer S, remove the blind lid 4 and pull it out, and the strainer holding frame 2 connected to the blind lid 4 via the snap stopper 5 will be successively pulled out from the charging port 11. come. Then, when it is pulled out, pinch the snap stopper 5 and compress its free end toward the outer peripheral surface of the strainer holding frame 2 to release the fitting between the tips of the sleeve plates 50, 50 and the annular groove 41. For example, since the strainer holding frame 2 comes to come out from the blind lid 4 upwardly, the opening on the lower side of the strainer holding frame 2 is opened, and the inner peripheral surface of the strainer S is opened from there. Cleaning can be performed by passing the cleaning water through.

As explained above, the strainer assembly device for the pressure reducing valve according to the present invention holds the cylindrical strainer S so as to form the circumferential wall of the body, holds the check valve mechanism a on the upper surface side, and holds the strainer S on the outer periphery of the upper end side. At the lower end of the strainer holding frame 2, which is equipped with a fitting part 20 that fits into a fitting hole 32 in the valve box 1, a flange part 21 that protrudes outward from the outer periphery of the trunk wall in a shelf-like manner is provided.
The lower end of the strainer holding frame 2 is freely inserted into and removed from a recess 40 formed on the upper surface side of the blind lid 4 which is screwed into the charging port 11 provided in the bottom wall 1a of the valve box 1. The tip sides of the sleeve plates 50, 50 of the snap stop 5 made of spring plates are arranged in the annular groove 41 formed in the inner wall surface 40a of the strainer holding frame 2 above the upper surface of the flange 21 of the strainer holding frame 2. Since the strainer is constructed by fitting together, it is easy to assemble the strainer into the valve case and take it out from the valve case, and the strainer can be easily cleaned without causing clogging. become.

[Brief explanation of the drawing]

Fig. 1 is a longitudinal sectional front view of the conventional means, Fig. 2 is a longitudinal sectional front view of the same strainer holding frame as above, Fig. 3 is an explanatory view of the main parts of another conventional means, and Fig. 4 is the same as the above assembled state. 5 is a longitudinal sectional front view of a pressure reducing valve that can implement the present invention, FIG. 6 is a longitudinal sectional view of the strainer holding frame shown above, FIG. 7 is a longitudinal sectional view of the blind lid shown above, and FIG.
The figure is a perspective view of the above-mentioned snap stopper, and FIG. 9 is a longitudinal sectional front view of the above-mentioned strainer holding frame in an assembled state. Explanation of drawing symbols, A...Pressure reducing valve, S...Strainer, a...Check valve mechanism, b...Pressure reducing valve mechanism, 1
... Valve box, 1a ... Bottom wall, 10 ... Water supply inlet, 1
DESCRIPTION OF SYMBOLS 1... Charging port, 12... Water supply outlet, 2... Strainer holding frame, 20... Fitting part, 21... Flange part, 3
... Valve body, 30 ... Valve rod, 31 ... Valve seat, 32 ...
...Mounting hole, 33...Spring, 4...Blind cover, 40...
Recessed portion, 40a... Inner peripheral wall, 41... Annular groove, 5...
...Snap stopper, 50...Sleeve plate.

Claims (1)

[Scope of utility model registration request] A cylindrical strainer S is held so as to form a body peripheral wall, a check valve mechanism a is held on the upper surface side, and a fitting part 20 that fits into the mounting hole 32 in the valve box 1 is installed on the outer periphery of the upper end side. A flange 21 that protrudes outward from the outer surface of the trunk wall in a shelf-like manner is provided at the lower end of the strainer holding frame 2 provided, and the lower end of the strainer holding frame 2 is opened in the bottom wall 1a of the valve box 1. Charging port 1
A recess 40 formed on the upper surface side of the blind lid 4 that is screwed into the lid 1
The end side of the sleeve plates 50, 50 of the snap stopper 5 made of a spring plate is inserted into the annular groove 41 formed in the inner wall surface 40a of the recess 40 so as to be inserted into and removed from the strainer holding frame 2. A device for assembling a strainer in a pressure reducing valve, which is arranged above the upper surface of the flange portion 21 and fitted.