JP2537638Y2 - Simple exchange type check valve - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a check valve connected to a ball valve or the like. The present invention relates to a simple exchange type check valve capable of maintaining good performance of a stop valve.

[0002]

2. Description of the Related Art Generally, a home water meter box is provided with an open / close valve for stopping water so that water does not blow out when replacing a faucet or the like in a room. A check valve is interposed between them.

As shown in FIGS. 4 and 5, this type of check valve has a check valve body b in a substantially cylindrical main body a and a spring c.
The stopper ring d for receiving the bias of the check valve body b is fitted to the opening end of the main body a, and a thin plate-shaped stop spring e is provided on the inner wall of the main body a. The structure is such that the stopper ring d is pressed into the groove f. In this check valve, an opening end is fitted into a connection port h of a ball valve g or the like, an elastic packing i and a split ring j made of synthetic resin are fitted outside, and a cap nut k is screwed into a threaded portion of the connection port h. The water meter connection port (not shown) is fastened and fixed with a cap nut m at the opening end on the other side. Note that n, p, q, and r in FIG.
It is a seal member such as a ring.

[0004]

In the conventional check valve, when replacing the check valve member b or its O-ring p or spring c, the thin plate-like stop spring e is moved from the concave groove f of the main body a. The stopper ring d must be removed and the stopper ring d must be removed. In particular, the thin plate-shaped stopper spring e must be forcibly removed by being hooked with a sharp tool or the like, which is troublesome. It is. Therefore,
There is a problem that the replacement work of the check valve body b and the like cannot be easily performed. In addition, the thin plate-shaped stopper spring e may be damaged or deformed by a sharp tool or the like when it is attached or detached. In some cases, the fixing of d becomes unstable, and a gap is formed between the check valve body b and the performance of the check valve.

SUMMARY OF THE INVENTION The present invention has been made to solve such a conventional problem. The present invention eliminates the use of a thin plate-shaped stopper spring, and allows easy replacement of a member such as a non-return valve body mounted therein, and a component. It is an object of the present invention to provide a simple exchange type check valve capable of maintaining good performance as a check valve even after replacement.

[0006]

As a means for technically solving this problem, the present invention is a check valve in which a ball valve is connected to one end and a water meter is connected to the other end. A concave groove is formed on the outer peripheral portion on the one end side of the substantially cylindrical body, and a ring-shaped projection is formed on the inner peripheral portion, and a check valve body is provided in the main body via a spring. A stopper ring mounted and inserted into the main body from the one end side is received by the ring-shaped projection, and the check valve body is urged by a spring to press against the stopper ring, so that the synthetic resin is pressed. A retaining ring formed in two parts and provided with a ring-shaped engagement protrusion on the back side is fitted into the groove, and is attached to the open end on the one end side. By pressing the stopper ring Attached, and further wherein the O-ring fitted to the outer periphery of the retaining ring of split, and the gist configuration of the retaining ring of the split was held in the ring fixed to the open end of the one end side.

[0007]

[Operation] When replacing parts such as the check valve attached to the inside of the check valve, the O-ring can be easily removed from the main body by removing the O-ring. The stopper ring can be easily removed. Therefore, it is possible to easily pull out the check valve body and the like mounted at the back and replace the parts. Also, since the stopper ring is securely fixed by the split retaining ring without using a thin plate-shaped retaining spring, the degree of close contact between the stopper ring and the check valve body b is improved, and the check valve is maintained even after the parts are replaced. Performance can be maintained satisfactorily.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the accompanying drawings. In FIG. 1, reference numeral 1 denotes a check valve main body formed in a substantially cylindrical shape, and a concave groove 1a for fitting is formed in an outer peripheral portion of one open end of the check valve main body. It is attached by being urged to the opening end side via the.

Reference numeral 4 denotes a stopper ring, which is fitted to the open end of the main body 1 to receive the check valve 2.
The stopper ring 4 is fixed by being received by a ring-shaped protrusion 1 b provided on the inner wall of the main body 1 and pressed by a retaining ring 5.

The retaining ring 5 is made of a synthetic resin or the like, and is provided with a ring-shaped engaging projection 5a which fits into the concave groove 1a of the main body 1 on the back side.

Reference numeral 6 denotes an O-ring fitted to the outer peripheral portion of the split retaining ring 5, and the O-ring 6 allows the retaining ring 5 to be attached and detached. That is, if the O-ring 6 is removed, the retaining ring 5 can be separated into two parts and removed from the main body 1, and if the O-ring 6 is fitted, the split retaining ring 5 is held in a ring shape and fixed to the main body 1. Can be.

Reference numeral 7 denotes a telescopic packing fitted to the outer periphery of the opening end of the main body 1. A split ring 8 is fitted in contact with the telescopic packing 7, and a cap nut 9 for mounting is further fitted. .

Reference numeral 10 denotes a cap nut fitted on the outer periphery of the other open end of the main body 1, with a sealing ring 11 interposed therebetween.

In the check valve R constructed as described above, the open end of the main body 1 (the side with the retaining ring 5) is fitted into the adapter 12a of the ball valve 12, and the outer periphery of the adapter 12a, as in the prior art. The cap nut 9 is screwed and fastened to a screw portion 12b provided in the ball valve 12 so as to be connectable to the ball valve 12. On the other hand, a water meter 13 is attached to the other end of the check valve R by the cap nut 10 as shown by a virtual line.

After connecting the check valve R, the ball valve 12
When the opening / closing lever 12c is rotated to open the flow path, the water that has passed through the ball valve 12d pushes the check valve body 2 to flow into the main body 1, and further flows from the check valve R to the meter 13. Is formed.

When replacing parts such as the check valve body 2 mounted inside the check valve R, first, the ball valve 12
The ball valve 12d is rotated by the opening / closing lever 12c to stop water, the cap nuts 9 and 10 are removed, and the check valve R is separated from the ball valve 12 and the meter 13 and taken out.

Next, if the O-ring 6 that fixes the split retaining ring 5 is removed, the retaining ring 5 is inserted into the concave groove 1a of the main body 1.
Since the stopper ring 4 can be pulled out by removing the retaining ring 5, parts such as the check valve body 2 at the back thereof can also be pulled out.

After exchanging parts such as the check valve element 2 or its O-ring 2a or the spring 3, these parts are put back into the main body 1 and the stopper ring 4 is fitted into the main body 1 to contact the projection 1b. Then, the engaging projections 5a of the split retaining ring 5 are fitted into the concave grooves 1a of the main body 1 and pressed by hand, and the O-ring 6 is fitted on the outer peripheral portion thereof, thereby fixing the split retaining ring 5 in a ring shape. Thus, the replacement of the components such as the check valve 2 is completed.

The check valve R whose parts have been replaced in this way is
Is connected to the ball valve 12 and the meter 13 via the cap nuts 9 and 10, respectively, and then the ball valve 12d is rotated by the open / close lever 12c to open the flow path again. A communication path leading to the meter 13 through the valve R is formed, and can be returned to the original state.

[0020]

[Effects of the Invention] As described above, according to the present invention,
A split retaining ring is fitted to the open end of the check valve and an O-ring is fitted around its outer periphery so that the split retaining ring can be fixed, so removing the O-ring makes it easy to split the retaining ring. Can be removed. Therefore, if the retaining ring is removed, the stopper ring comes off, and the components such as the check valve body mounted inside can be easily replaced.In addition, since the conventional thin plate-shaped retaining spring is not used, the stopper ring is reversed. It has excellent effects such as improving the degree of close contact with the stop valve body and maintaining good performance as a check valve even after replacing parts.

[Brief description of the drawings]

FIG. 1 is a sectional view of a main part showing an embodiment of the present invention.

FIG. 2 is a plan view of a ball valve portion.

FIG. 3 is a perspective view of a split retaining ring.

FIG. 4 is a sectional view of a main part showing a conventional example.

FIG. 5 is an exploded perspective view of a part thereof.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body 1a ... Depressed groove 1b ... Protrusion part 2 ... Check valve element 2a ... O-ring 3 ... Spring 4 ... Stopper ring 5 ... Split retaining ring 5a ... Engagement protrusion 6 ... O-ring 7 ... Telescopic packing 8 ... Split Ring 9, 10 ... Cap nut 11 ... Ring for sealing 12 ... Ball valve 12a ... Adapter
12b: Screw portion 12c: Open / close lever 12d:
Ball valve

Claims (1)

(57) [Scope of request for utility model registration] 1. A ball valve at one end and a water valve at the other end.
Valves are connected to each other.
A concave groove is formed in the outer peripheral portion on the one end side of the main body formed in
In addition, a ring-shaped projection is formed on the inner periphery,
A check valve body is attached to the body via a spring,
Insert the stopper ring inserted into the main body from the end
To the stopper ring.
So that the stop valve is urged by the spring
And formed into two pieces with synthetic resin, etc.
The retaining rings provided with the respective engagement projections are connected to the ring-shaped engagement ring.
Mating projections are respectively fitted in the concave grooves, and the opening on the one end side is opened.
Hold down the stopper ring by attaching to the end
O-ring is attached to the outer circumference of the split snap ring.
Fitting, holding the split retaining ring in a ring shape,
A simple exchange-type check valve characterized in that it is fixed to an open end of the valve.