JP2013221333A - Connection joint of meter box for water service and holder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To solve a problem that: conventionally, a primary side of a meter for water service large in nominal diameter is connected with a secondary side of a meter holder by using a dedicated joint which laps a flange abutting part of them by two arcuate outer shell bodies from the upper side and the lower side to join the flange abutting part and absorbs misalignment by an involved elastic packing, but joining and mounting work of the outer shell bodies needs skill and a time and occurrence of water leak and the like may be unavoidable when an operator is unskilled.SOLUTION: A primary side is provided with a junction structure with a fastening holder 1a of a meter holder for water service, a secondary side is provided with a fit-in recess 22 which receives a primary side flange of a meter for water service, and a fastening holder of a holder base and the primary side end of the meter for water service are connected with each other by a connection joint in which an elastic ring 4 is set on the circumference of a communication water channel opening to the meter of the fit-in recess.

Description

  The present invention relates to a connection joint for connecting a tightening holder of a holder base used when a water meter is attached to a holder base and a primary side end of the water meter.

  Both ends of the meter for water supply are engraved with external threads on the outer wall of the meter water channel, and conventionally connected with nuts by screwing. For example, as described in Reference 1, the primary side of the secondary side holder is primary. When a method for advancing and retracting the tightening holder from the side was developed, a method was adopted in which the primary side holder water channel and the water meter water channel were pressure bonded together and the water meter was attached to the holder base.

However, since the water meter having a nominal diameter of 50 or 75 is difficult to be connected by screwing, it has a joining structure of flange-type bolt fastening.

  In the case of flange-type bolted joints, a strainer supplementary pipe must be joined to the primary side of the meter. However, it is difficult to align bolting and position to eliminate misalignment. A joining method that absorbs misalignment by using a wire has come to be used.

  As for the housing type joint, for example, as described in the cited reference 2 as an example, the joint is connected to two pipes, and after the connection, the housing type joint is connected, or the circular arc as described in the cited reference 3 is used. And a flange portion extending from both ends of the arc portion and the arc portion, forming a concave groove on the inner peripheral surface of the arc portion, fitting an elastic seal ring, and matching the outer peripheral surface of the pipe connected to the peripheral edge of the arc portion by bending thereof Have been described.

  There is no literature on the connection of strainer supplementary pipes by flange-type bolted joints in water meters, but water meter A and supplemental pipes with strainers are joined with a dedicated housing-type joint as shown in FIG. Has absorbed core misalignment and movement.

Thereafter, when a method for moving the clamping holder forward and backward from the primary side with respect to the secondary side receiving holder as described in the above cited reference 1 is developed, as shown in FIG. 7, a strainer is used without using a supplementary pipe. The main body portion is configured as a connection fitting in which a flange is formed at the secondary side end portion, and abuts against the flange surface of the meter primary side end.

Furthermore, since the secondary side of the connection fitting is joined to the primary side of the meter by the housing type joint as before, this connection form requires skill to install the housing type joint at the joint. In particular, there was a problem that required time and labor.
JP 2007-85088 A JP 2009-2518 A Japanese Patent Application Laid-Open No. 2011-237011

However, in the same manner as the dedicated joint shown in FIG. 6, the above-mentioned connection fitting also has a basic configuration in which two arc-shaped outer shell bodies are superposed from above and below to mate the flange abutting portion and absorb the core misalignment by the internal elastic packing. Therefore, it takes time and skill to attach and attach the outer shell, and there is a problem that water leakage and the like are unavoidable when it is immature.

  Furthermore, since a housing-type joint dedicated to a water meter is attached, the manufacturing cost is high, the installation work takes time and skill, and further problems are left in the subsequent maintenance.

  The present invention is intended to address the above-described problems, and has a fitting structure with a fastening holder for a water meter holder on the primary side, and a fitting for receiving a flange on the primary side of the water meter on the secondary side. While providing a recessed part, the fastening base of the holder base and the primary side edge part of a water meter were connected by the connection joint which set the elastic ring in the periphery of the communicating water channel opening part to the meter of the fitting recessed part.

  Since the present invention is configured as described above, the strainer body is attached to the primary side of the connection joint and is crimped to the tightening holder of the water meter holder, and the water meter primary is inserted into the insertion recess on the secondary side. By receiving the side end flange and advancing the tightening holder, the tightening holder of the holder base and the primary end of the water meter can be pressed and connected at once.

In addition, centering positioning can be performed simply by inserting the primary flange of the water meter into the insertion recess without using a special joint such as a housing type joint, which is extremely efficient in terms of work efficiency and material cost. It is advantageous.

In addition, the strainer body can be set at the joint of the primary side pipe, and foreign matter can be prevented from flowing into the water meter, reducing the distance between the faces of the meter holder including the joint and reducing water pressure loss. There is.

The Example of this invention shows the Example, The whole side view of the water meter holder which made the principal part in the state which wears the water meter using the connection coupling by this invention made the notch cross section Similarly, the enlarged longitudinal sectional view of the fitting recess of the connection joint showing the state where the primary side end of the water meter is press-fitted in a watertight manner into the fitting recess of the connection joint secondary side. Similarly, an enlarged side view of a joint of a tightening holder, a connecting joint, and a water meter with a cut-out cross section showing the main part of an embodiment in which a flange to be received in a fitting recess is locked with a bolt Similarly, an enlarged longitudinal sectional view of the insertion recess in a state where the flange is inserted, showing an embodiment in which the flange received in the insertion recess is locked by the split ring. FIG. 4 is a cross-sectional view taken along the line BB in FIG. 4 showing a setting state of the split ring in the embodiment in which the flange received in the fitting recess is locked with the split ring. Overall side view of a water meter holder showing a structure in which a water meter and a supplementary pipe with strainer are joined by a special housing type joint. Similarly, an overall side view of a water meter holder with a cut-out cross section showing the structure of joining a conventional water meter and a dedicated connection fitting with a dedicated housing-type joint.

  Hereinafter, an embodiment of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a holder base body, which is composed of a pair of a primary tightening holder 1a and a secondary receiving holder 1b facing both sides, In the meantime, the water meter A is sandwiched and supported through the connecting joint according to the present invention.

Reference numeral 2 is a connection joint, the primary side is a joint portion 21 with a strainer mechanism 3 that contacts the fitting surface 11 of the tightening holder 1a, and the secondary side is fitted to receive the flange H of the primary end of the water meter. A recess 22 is formed. When the flange H is inserted into the insertion recess 22 and the water meter A is interposed, the tightening holder 1a is pushed toward the receiving holder 1b by turning the handle 12, and both ends of the water meter A are pressed against each other. Connect and connect.

  An elastic ring 4 such as an O-ring or packing is buried in the contact surface 23 of the insertion recess 22 with the end of the water meter flange H, the flange of the water meter is inserted, and the end surface of the flange H is inserted into the contact surface 23. When pressed, the elastic ring 4 is crushed and the watertightness of the connecting portion is maintained.

  As described above, in the connection joint according to the present invention, if the flange on the primary side end of the water meter is inserted into the insertion recess 22, the insertion side wall surface of the insertion recess guides the peripheral wall of the flange H in the core direction. There is no need to center the water meter primary side as in the case of using the

If the bolt hole is set in the peripheral wall of the insertion recess as the locking means, the flange H is inserted into the insertion recess 22, and then the flange H is locked by the bolt tightening 5, the connection joint 2 is connected to the water meter primary side end. The connection joint that is locked and inserted into the flange H is prevented from coming off from the water meter, and the work of bringing the joint portion 21 with the strainer mechanism 3 into contact with the fitting surface 11 of the tightening holder 1a is facilitated. .

If the diameter of the insertion recess is in close insertion with the diameter of the flange H, the fitting is stable without bolting, and the fitting work to the fastening holder 1a can be performed as it is. For that, it is better to bolt.

In the second embodiment, as shown in FIG. 4, a groove 61 is formed in the inner peripheral wall of the insertion recess 22 to set the split ring 6. When the flange H is inserted into the insertion recess 22, the split ring 6 Is pressed by the peripheral surface of the flange H and retracts into the deep space of the concave groove 61 to pass the flange H. When the flange H passes, the diameter decreases and the inner periphery of the ring protrudes from the concave groove 61 to The end is locked, and the flange H is prevented from being detached from the insertion recess 22.

By comprising in this way, if the flange H is inserted in the insertion recessed part 22, the flange H will be automatically latched by the insertion recessed part 22 as it is, and the water meter A can be handled safely.

  The connection joint between the water meter and the holder according to the present invention can easily connect the water meter primary side and the meter holder secondary side, which has required a great deal of time and labor, so far. Therefore, it has a high utility value in the water supply industry in various forms such as normal maintenance of water meters on the ground and repair and replacement of parts.

DESCRIPTION OF SYMBOLS 1 Holder base main body 1a Primary side clamping holder 1b Secondary side holder 11 Tightening holder connection joint fitting surface 12 Tightening holder propulsion rotation handle 13 Tightening holder connection joint fitting surface embedded O-ring 2 Connection joint 21 Connection Joint tightening holder joint 22 Flange insertion recess 23 of connection joint Flange contact surface 3 of the insertion recess 3 Strainer mechanism 4 Elastic ring 5 Bolt tightening 6 Split ring 61 Split ring setting recess of insertion recess A Water meter a Conventional example Groove H of housing type joint packing Flange at the primary end of water meter

Claims (3)

The primary side has a fitting structure with the fastening holder of the water meter holder, and the secondary side has a fitting recess that accepts the flange on the primary side of the water meter, and the communication channel opening to the meter of the fitting recess Connection joint for water meter and holder, characterized in that elastic ring is set on the periphery The joint for connecting a water meter and a holder according to claim 1, wherein a locking means for the water meter flange is set on the peripheral wall of the fitting recess for receiving the flange on the primary side end of the water meter. 3. A joint for connecting a water meter and a holder according to claim 2, wherein the engaging means set on the peripheral wall of the insertion recess for receiving the water meter flange is constituted by a projecting piece that is urged in the protruding direction and protrudes freely into and out of the inner wall of the insertion recess.

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