JP3165658U - Adapter for water meter - Google Patents

Abstract

Provided is a water meter adapter that allows an existing first meter to be replaced with a second meter having a shorter surface-to-face dimension without having to perform piping work again. An adapter has a through-hole, and the through-hole is connected to a small-diameter portion through a small-diameter portion at one end in the axial direction of the adapter and a shoulder portion radially expanding at an inner end portion of the small-diameter portion. And a large diameter portion on the other end side. The other end is provided with a female screw which is screwed into the male screw 4 provided at the inflow port 3 or the outflow port 5 of the second meter, and the outer circumference of one end is provided with a male screw having the same diameter as the male screw of the second meter. The end of the inlet or outlet of the meter abuts the shoulder when the adapter is assembled to the meter, and the distance between the shoulder and one end of the adapter is the distance between the first meter and the second meter. The dimension is set so as to be equal to the difference between the faces of the meter. [Selection diagram] Fig. 1

Description

  The present invention relates to a water meter adapter. More specifically, the present invention relates to an adapter that is used by attaching to a newly installed meter when the face-to-face dimension of a newly installed meter is shorter than the face-to-face dimension of an existing meter when replacing a water meter.

  Currently, water meters are to be replaced every 8 years according to the law. By the way, the meters currently in use generally have a dimension between a water inlet end and an outlet end, that is, a so-called inter-surface dimension of 165 mm and 100 mm. However, depending on the water utility, for example, a meter having a surface dimension of 114 mm has been used. However, as described above, those having a face-to-face dimension of 165 mm and 100 mm are common, and therefore, it is easier to obtain from a meter having a face-to-face dimension of 114 mm. Therefore, when replacing the meter, it would be advantageous if a meter with a face-to-face dimension of 100 mm could be used instead of the meter with a face-to-face dimension of 114 mm.

However, the pipes including the stop cocks and check valves connected to both sides of the meter are naturally sized according to the meter with a face-to-face dimension of 114 mm. For example, a meter with a face-to-face dimension of 100 mm is installed. Therefore, if it is going to be replaced, the length of the piping is not sufficient as it is, and it is necessary to redo the piping work. However, the pipes on the downstream side of the meter are usually buried in the ground, and it takes a lot of time and money to start new piping work again.

  By the way, an existing meter having a face-to-face dimension of 165 mm may be replaced with a meter having a face-to-face dimension of 100 mm using a 65 mm supplementary tube. In this case, since the supplementary pipe has a sufficient length, a screw for connecting the pipe to the supplementary pipe can be formed. However, even if you try to use a 14 mm long supplemental tube to replace a meter with a face dimension of 114 mm with a meter with a face dimension of 100 mm, the length is not enough, so you can ensure a firm and secure connection with the pipe. A screw with a length of cannot be formed.

Until now, such a problem has not been a problem so much, and the applicant is unaware of a document that discloses a technique that addresses this problem.

  The present invention has been made in view of the above-mentioned conventional problems, and when replacing a water meter, even if a newly installed meter has a shorter face-to-face dimension than the meter to be replaced, piping work on the upstream and downstream sides of the meter is required. It is an object to provide an adapter for a water meter that allows its use without the need for repair, thereby enabling the use of commonly available meters of common dimensions.

In order to solve the above-mentioned problem, the present invention proposes an adapter that is used by attaching to a second meter when the installed first water meter is replaced with a second water meter having a face-to-face dimension shorter than that of the first meter. I will provide a. The adapter is a cylindrical member having a through-hole, and the through-hole is connected to the small-diameter portion via a small-diameter portion on one end side in the axial direction of the adapter and a shoulder portion that extends radially in the inner end portion of the small-diameter portion. It consists of a large diameter part on the other end side. The other end of the adapter is provided with a female screw that is screwed into a male screw provided at the inlet or outlet of the second meter, and a male screw having the same diameter as the male screw of the second meter is provided on the outer periphery of one end of the adapter. ing. When the adapter is assembled to the second meter, the end of the inlet or outlet of the second meter contacts the shoulder of the adapter. And the distance between a shoulder part and the one end side edge part is equal to the difference of the inter-surface dimension of a 1st meter and a 2nd meter.
A circumferential groove is formed in the shoulder portion of the adapter so as to surround the small diameter portion of the through hole, a seal ring is received in the circumferential groove, and the end of the inlet or outlet of the second meter is the shoulder. The seal ring is compressed by coming into contact with the portion and seals between the adapter and the second meter.
The circumferential groove formed in the shoulder is formed so that at least the wall on the outer peripheral side is inclined so that the width of the groove becomes narrower toward the opening side of the groove.

By using the adapter as described above, an existing meter with a non-common face-to-face dimension can be easily obtained without having to redo the piping work on the upstream and downstream sides of the meter. Can be replaced.
In addition, a circumferential groove is formed in the shoulder, and a seal ring is received there, which is used to seal between the meter and the adapter, so there is no need to use a custom-made union packing. Sealing can be performed at low cost.
In addition, since the circumferential groove is formed in the shape of an antagon, the seal ring once attached is not detached during the operation, and the workability is excellent.

It is a partially cutaway side view of a water meter with the adapter of the present invention attached. It is a longitudinal cross-sectional view of the adapter of the state which attached the seal ring.

  A water meter adapter according to an embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a partially cutaway front view of a water meter with an adapter according to an embodiment of the present invention attached, and FIG. 2 is a longitudinal sectional view of the adapter with a seal ring attached.

  As shown in FIG. 1, in this embodiment, the adapter 11 is attached to the inlet 3 of the meter 1. However, the adapter 11 can be attached to the outlet 5 for use. The meter 1 is a meter after replacement. The dimension between the end portion on the inlet 3 side and the end portion on the outlet 5 side, the inter-surface dimension L1 is the distance between the surfaces of the meter (not shown) installed before the replacement. It is shorter than the dimension L2. That is, the meter installed before the replacement is not a very general meter having a face-to-face dimension of, for example, 114 mm, and the meter 1 after replacement is a general one having a face-to-face dimension of 100 mm and is easily available. It is. An upstream pipe including a stop cock (not shown) is provided on the upstream side (left side in FIG. 1) of the meter 1, and a downstream pipe including a check valve is provided on the downstream side. Yes.

  The adapter 11 includes a through-hole 13, and the through-hole 13 is one end side in the axial direction of the adapter 11, that is, the small-diameter portion 15 that is upstream when attached to the meter 1, and the other end side, that is, the downstream side. The large-diameter portion 17 is larger in diameter than the small-diameter portion 15. A boundary portion between the small diameter portion 15 and the large diameter portion 17 is a shoulder portion 19 that extends in the radial direction. The outer diameter of the adapter 11 is also smaller at one end than at the other end.

A male screw 21 having the same diameter as the male screw of the inlet 3 or the outlet 5 of the meter 1 is formed on the outer periphery of the adapter 11 at one end in the axial direction. On the other hand, a female screw 18 that is screwed into the male screw 4 formed on the outer periphery of the inlet 3 of the meter 1 is formed in the large diameter portion 17 of the through hole 13 on the other end side. The male threads formed at the inlet 3 and the outlet 5 of the meter have the same dimensions, and the dimensions are determined according to the nominal diameter of the meter.

A groove 23 extending in the circumferential direction is formed in the shoulder portion 19 in the through hole 13 so as to surround the small diameter portion 15 of the through hole 13. The circumferential groove 23 is inclined so that the width of the groove 23 becomes smaller as the outer peripheral wall faces the outlet of the groove 23, and the groove 23 is formed in a so-called “Arimizo” shape. In the circumferential groove 23, a seal ring 25 constituted by an O-ring is received in the present embodiment. Since the circumferential groove 23 is shaped like an arbor, the seal ring received in the one-end groove 23 is difficult to come off.

As shown in FIG. 1, the length from the shoulder portion 19 of the adapter 11 to the end portion on one end side is the distance L2 between the faces of the meter installed before replacement and the distance L1 between the faces of the meter 1 after replacement. Is equal to the difference. Accordingly, with the seal ring 25 attached, the female screw 18 of the adapter 11 is screwed into the male screw 4 of the inlet 3 of the meter 1 as shown in FIG. 1, and the end of the inlet 3 of the meter 1 passes through the adapter 11. When tightened until it abuts against the shoulder 19 in the hole 13, the length from the outlet 5 side end of the meter 1 to the end on the one end side of the adapter 11 matches the face-to-face dimension of the meter before replacement. Become. At this time, the seal ring 25 is compressed, and sufficient sealing is performed. Therefore, even if a meter with a long face-to-face dimension is replaced with a meter with a short face-to-face dimension, there is no need to rework the pipes on both sides of the meter and no additional piping work is required. The meter can be easily replaced.

  In this embodiment, in order to perform sealing between the adapter 11 and the meter 1, a circumferential groove is formed in the shoulder portion 19 of the adapter 11, and an O-ring 25 as a seal ring is disposed there. It was set as the structure which presses against the inlet_port | entrance 3 side surface of the meter 1 and compresses to this. Normally, a union packing is disposed between the end face of the pipe and the inlet or outlet end face of the meter, and this is compressed to seal the contact portion between the meter and the pipe. In that case, the dimensions of the union packing are determined by the standard depending on the nominal diameter of the meter. However, when using an adapter as in the present invention, standard union packing cannot be used, and a custom-made product must be used, resulting in an increase in cost. However, in this embodiment, the circumferential groove is formed in the shoulder portion as described above, and the O-ring received therein is compressed and sealed. Many O-rings of various sizes are commercially available, and can be easily obtained without increasing the cost.

Claims (3)

  An adapter that is used by being attached to a second meter when the installed first water meter is replaced with a second water meter having a face-to-face dimension shorter than the first meter. The adapter has a cylindrical shape having a through hole. The through-hole is a small-diameter portion on one end side in the axial direction of the adapter and a large-diameter portion on the other end side connected to the small-diameter portion via a shoulder portion that extends radially in the inner end portion of the small-diameter portion. And having the same diameter as the male screw of the second meter on the outer periphery of the one end side, the female screw provided on the inlet or outlet of the second meter on the other end side. The end of the inlet or outlet of the second meter abuts the shoulder when the adapter is assembled to the second meter, and the shoulder and the one end side end The distance between the first meter and the second meter Characterized in that equal to the difference between the inter-plane dimensions of the chromatography data, adapter water meters.   2. The water meter adapter according to claim 1, wherein a circumferential groove is formed in the shoulder portion so as to surround the small diameter portion of the through hole, and a seal ring is received in the circumferential groove. The water meter is characterized in that the seal ring is compressed by the end of the inlet or outlet of the meter coming into contact with the shoulder to seal between the adapter and the second meter. Adapter. 3. The water meter adapter according to claim 2, wherein the circumferential groove is formed so as to be inclined so that the width of the groove becomes narrower as the wall on the outer peripheral side moves toward the opening side of the groove. Yes, an adapter for water meters.

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