JPH0575568U - Simple exchange type check valve - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate replacement of parts such as a valve element mounted inside a check valve, and to maintain good performance as a check valve even after parts replacement. [Structure] A check valve connected to a ball valve or the like, wherein a check valve body is urged through a spring in a substantially cylindrical body, and the check valve body is provided at an opening end of the body. Fit a stopper ring for receiving. In order to press the stopper ring, a split snap ring is fitted to the open end of the main body, and an O-ring is fitted and fixed to the outer circumference of the snap ring. If you remove this O-ring, you can easily remove the retaining ring in two.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 INDUSTRIAL APPLICABILITY The present invention is a check valve connected to a ball valve, etc., in particular, parts such as a check valve body mounted inside the main body can be easily replaced, and the performance of the check valve can be improved after parts replacement. The present invention relates to a simple exchange-type check valve that can be held at the.

[0002]

[Prior Art]

 Generally, an opening / closing valve is installed in a household water meter box to stop water from spouting when replacing a water faucet in a room, and between this opening / closing valve and the water meter. A check valve is interposed.

In this type of check valve, as shown in FIGS. 4 and 5, conventionally, a check valve body b is mounted in a substantially cylindrical main body a through a spring c, and the check valve body b is attached to the check valve body b. A structure in which a stopper ring d for receiving the bias is fitted to the opening end of the main body a, and a thin plate-shaped stop spring e is further fitted in a groove f formed in the inner wall of the main body a to press the stopper ring d. I am doing it. In this check valve, the opening end is fitted into the connection port h of the ball valve g or the like, the expansion packing i and the split ring j made of synthetic resin are fitted to the outside, and the cap nut k is attached to the threaded part of the connection port h. It is attached by screwing, and the connection port (not shown) of the water meter is fixed to the open end on the other side with the cap nut m. In addition, n, p, q, and r in FIG. 4 are sealing members such as O-rings.

[0004]

[Problems to be solved by the device]

 In the conventional check valve, when replacing the check valve body b or its O-ring p, spring c, or the like, the thin plate-shaped stop spring e must be removed from the groove f of the main body a and the stopper ring d must be removed. In particular, the thin plate-shaped retaining spring e is troublesome because it has to be forcibly removed by hooking it with a sharp tool or the like, and it is troublesome to fit it into the concave groove f again after replacement. Therefore, there is a problem that the check valve body b and the like cannot be easily replaced. Further, the thin plate retaining spring e may be damaged or deformed by a sharp tool or the like at the time of attachment / detachment. Therefore, after the replacement of the components, the mounting in the concave groove f becomes incomplete and the stopper is not formed. The fixation of the ring d may become unstable, and a gap may be created between the ring d and the check valve body b to deteriorate the performance of the check valve.

The present invention has been made in order to solve the above-mentioned conventional problems, abolishes the thin plate-shaped stop spring, and can easily replace members such as a check valve body mounted inside and It is an object of the present invention to provide a simple exchange type check valve that can maintain good performance as a check valve even after product replacement.

[0006]

[Means for Solving the Problems]

 As a means for technically solving this problem, the present invention is a check valve connected to a ball valve or the like, in which a check valve body is biased via a spring in a substantially cylindrical body. A stopper ring for receiving the check valve body is fitted to the opening end of the main body, and a split snap ring is attached to the opening end of the main body to hold the stopper ring. The gist of the invention is to fit and fix an O-ring on the outer peripheral portion of the split ring.

[0007]

[Work]

 When replacing parts such as the check valve body mounted inside the check valve, you can easily remove the split ring from the main body by removing the O-ring, and it is pressed by the split ring. You can easily remove the stopper ring. Therefore, it is possible to easily replace the parts by pulling out the check valve body and the like mounted in the back. Also, the stopper ring is structured so that the stopper ring can be securely fixed with the split ring without using a thin plate-shaped stop spring, so that the close contact between the stopper ring and the check valve body b is improved, and the check valve is replaced even after the parts are replaced. It is possible to maintain excellent performance as.

[0008]

【Example】

 Hereinafter, embodiments of the present invention will be described 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 on an outer peripheral portion of one opening end of the check valve main body. It is attached by urging it toward the opening end side via.

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

The retaining ring 5 is made of a synthetic resin or the like in half, and on the back side thereof, ring-shaped engaging projections 5 a that fit into the concave grooves 1 a of the main body 1 are provided.

Reference numeral 6 denotes an O-ring fitted to the outer peripheral portion of the split ring 5 and the O-ring 6 allows the snap 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 can be held in a ring shape on the main body 1. Can be fixed.

Reference numeral 7 denotes an expandable 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 expandable packing 7, and a cap nut 9 for mounting is further fitted. is there.

Reference numeral 10 is a cap nut fitted to the outer circumference of the other opening end of the main body 1, and a seal ring 11 is interposed therebetween.

In the check valve R configured in this way, the open end (the one with the retaining ring 5) of the main body 1 is fitted into the adapter 12a of the ball valve 12 as in the conventional case, and the outer circumference of the adapter 12a is fitted. The cap nut 9 can be connected to the ball valve 12 by screwing and fastening the cap nut 9 on the threaded portion 12b provided on the. 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 an imaginary line.

After the check valve R is connected, when the opening / closing lever 12c of the ball valve 12 is rotated to open the flow path, the water passing through the ball valve 12d pushes the check valve body 2 and flows into the main body 1. Further, a communication passage is formed which flows into the meter 13 from the check valve R.

When replacing parts such as the check valve body 2 mounted inside the check valve R, first, the ball valve 12d is rotated by the opening / closing lever 12c of the ball valve 12 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 ring 5 is removed, this snap ring 5 can be easily removed from the concave groove 1 a of the main body 1, and if the snap ring 5 is removed, the stopper ring 5 can be removed. Since the valve 4 can be pulled out, parts such as the check valve body 2 behind it can also be pulled out.

After replacing the check valve body 2 or its O-ring 2a, spring 3 or other parts, these are housed in the main body 1 again, and the stopper ring 4 is fitted into the main body 1 so that the protruding portion 1b is inserted into the protruding portion 1b. When they are brought into contact with each other, the engaging projections 5a of the split snap ring 5 are fitted into the concave grooves 1a of the main body 1 and pressed by hand, and the snap ring 5 is split into two by fitting an O-ring 6 on the outer periphery thereof. It can be fixed in a ring shape, which completes the work of replacing parts such as the check valve body 2.

The check valve R, whose parts have been replaced in this way, is connected to the ball valve 12 and the meter 13 via the mounting cap nuts 9 and 10, respectively, and then the ball valve 12d is opened by the opening / closing lever 12c. By rotating and opening the flow path again, a communication path from the ball valve 12 to the meter 13 through the check valve R is formed, and the original state can be restored.

[0020]

[Effect of the device]

 As described above, according to the present invention, the split snap ring can be fixed by fitting the split snap ring to the open end of the check valve and fitting the O-ring on the outer periphery thereof. , If you remove the O-ring, you can easily remove the retaining ring in two. Therefore, if the retaining ring is removed, the stopper ring will come off and the parts such as the check valve body mounted inside can be easily replaced.Because the conventional thin plate retaining spring is not used, It has excellent effects such as improving the tightness with the stop valve and maintaining good performance as a check valve even after parts replacement.

[Brief description of drawings]

FIG. 1 is a sectional view of an essential 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 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 ... Recessed groove 1b ... Projection part 2 ... Check valve body 2a ... O ring 3 ... Spring 4 ... Stopper ring 5 ... Dividing snap ring 5a ... Engaging projection 6 ... O ring 7 ... Expansion packing 8 ... Split Rings 9, 10 ... Cap nuts 11 ... Sealing rings 12 ... Ball valves 12a ... Adapters
12b ... screw part 12c ... opening / closing lever 12d ...
Ball valve

Claims (1)

[Scope of utility model registration request] 1. A check valve connected to a ball valve or the like, wherein a check valve body is urged via a spring in a substantially cylindrical body, and the check valve body is provided at an opening end of the body. Fit a stopper ring for receiving the check valve body,
A simple exchange type check valve characterized in that a split ring is fitted into the opening end of the main body to hold down the stopper ring, and an O-ring is fitted and fixed to the outer periphery of the split ring. .