JP5208068B2 - Meter holder for water supply - Google Patents

Description

  BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water meter holder that removably supports both ends of a water meter and connects to a pipe part, and more particularly, a water meter holder that is difficult to directly work from the ground by embedding a meter in a cold region or the like. In order to prevent the inflow of foreign matter by blocking the immediate vicinity of the secondary side pipe opening when replacing the meter, preventing the return water from the secondary side, and further increasing the pressure loss and the inter-surface distance due to the addition of product functions It is related with the meter holder for water supplies which enabled it to suppress.

  Conventionally, when replacing a water meter that is difficult to work directly from the ground by embedding the meter in a cold place such as a cold region, the water-stopping packing and the backflow prevention valve are also raised to the ground together with the meter for replacement. However, at that time, the primary side is first stopped by a water stop cock, and the backflow prevention valve is removed together with the meter without giving any special treatment to the secondary side.

  To support the water meter on the meter holder, one opposing holder is used as a clamping holder, the other as a receiving holder, and the slider of the clamping holder is pushed toward the holder, and the meter end surface is pressed against the receiving surface of the holder and pressed. Thus, it has been practiced to sandwich and support a meter between the opposing holders.

  In addition, the clamping holder and the receiving holder are fixed by a holder port that is fixed integrally with the holder base as a base for supporting the water meter, and the distance between the faces as the meter insertion space is limited to the slider advance / retreat distance of the clamping holder. It is coming.

  For example, as described in Patent Document 1, the fixed structure of the meter holder as described above is configured separately from the holder base at both ends of the meter, and connected to a water pipe such as a check valve unit. It has also been proposed to provide a fluid adaptability to the overall structure of the holder base by incorporating an adjustment mechanism and mounting a pair of attachments attached to the holder.

  Furthermore, on the secondary side of the holder base, a cartridge type check valve unit is set in order to prevent a back flow from the pipe part to the meter, but the setting of the unit is, for example, as described in Patent Document 2, Fixed means have been taken, such as housing the unit in the housing space, fitting a washer and holding it with a meter piece, fitting a gasket, and fitting the fitting end of the meter.

In addition, although not used for meter holder base, there is a check valve as described in Patent Document 3, for example, in which a check valve seat and a valve body are made into a cartridge type as a unit.
JP 2003-83778 A Japanese Patent Laid-Open No. 2003-279397 JP 11-94104 A

  When the water meter is replaced, the water stop packing and the backflow prevention valve are also removed together with the meter for replacement. At that time, first, the primary side is stopped by a water stop cock, but the secondary water is stopped. Since the backflow prevention valve is removed together with the meter without any special treatment on the side, there is a problem that foreign matter flows into the backflow called secondary water from the secondary side pipe opening or the secondary side equipment.

  In particular, in the case of an embedded water meter, since the water faucet must be opened / closed and the connecting part attached / detached from the ground using a jig, the water-stopping packing and the backflow prevention valve are also raised to the ground together with the meter. In many cases, however, in the case of the buried type, the backflow from the secondary side pipe opening and the inflow of foreign matter leave a further problem in the subsequent maintenance.

  In order to prevent backflow and foreign matter inflow on the secondary side, set a check valve on the secondary joint at the meter end and set a check valve on the joint on the secondary pipe. It must be ensured that there is no backflow or inflow of foreign matter even when it is detached.To that end, the distance between the faces of the meter holder including the joint must be long, and the water pressure due to the increase in the number of valve elements There is a problem that the loss increases.

  The present invention is intended to address the above-described problems, and is provided with an advancing / retracting fastening cylinder that holds and presses the meter on the secondary side, and a water stop valve body that opens and closes a water passage opening at the tip of the fastening cylinder, and Set the valve body guide to open and close, and when the water meter is replaced, the primary side is stopped by the water stop valve and the secondary side is closed by the water stop valve body, and the reverse flow from the secondary side pipe opening And the inflow of foreign objects was prevented.

  By closing the secondary side with a water stop valve when the meter is removed as described above, it is possible to prevent backflow or inflow of foreign matter when replacing the meter without setting a check valve at the joint of the secondary side piping. Thus, the distance between the surfaces of the meter holder including the joint portion can be shortened and the loss of the water supply pressure can be avoided.

The whole front view of the water meter holder which shows the Example of this invention and made the principal part in the state which mounted | wore the water meter with the notch cross section Similarly, an overall front view of a water meter holder with a cutaway cross section of the main part with the water meter removed. Similarly, an overall plan view of the water meter holder with the water meter removed Similarly, an overall side view of a water meter holder with a water meter attached Similarly, the vertical cross-sectional view of the secondary holder port of the meter holder for waterworks showing the structure and water flow trap when the water inlet at the tip of the fastening tube is open Similarly, a longitudinal cross-sectional view of the secondary holder port of the water meter holder showing the water passage closing structure and the water-stopper when the water passage at the tip of the fastening cylinder is closed by the water stop valve body

  Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. Reference numeral 1 denotes a main body of a holder base, which is composed of a pair of a primary side holder 1a and a secondary side holder 1b facing both sides, Are provided with support rod fastening blades 21, 21, which are connected by fastening the support rods 2, 2.

  The primary holder 1a is provided with a leg portion 11 that supports the main body at the lower end portion and is self-supporting, and an inner end face is provided with a fitting portion 2a that is fitted to the end portion of the meter A, and a water faucet unit behind it. 3 is fitted, and a pipe connection structure 12 is provided at the outer end, and is connected to the water supply pipe.

  Like the holder 1a, the secondary holder 1b is provided with a leg portion 11 that supports the main body at its lower end portion and is self-supporting, and an inner end face is provided with a fitting portion 2b that is fitted to the end portion of the meter A. The portion 2b is fitted with a fastening cylinder 4 that moves forward and backward with respect to the end fitting end of the meter A, and the primary side holder 1a is received by the advancement of the fastening cylinder 4, and the secondary side holder. 1b is a clamping holder, and is crimped to both ends of the water meter A so as to support the meter A at the middle axis level of the base body 1, and a pipe connecting structure 13 is provided at the outer end to connect to the water supply branch It is supposed to be.

  Furthermore, when the fastening cylinder 4 is in an advanced state by the cam mechanism 42 that engages with the operation handle 43, the interval between the water flow port 44 of the fastening cylinder 4 and the water stop valve body 5 is set inside the fastening cylinder 4. The water passage is opened by holding, and when the fastening cylinder 4 is in the retracted state, the water stop valve body 5 is pressed against the water outlet 44 of the fastening cylinder 4 to close the water passage.

  The valve body guide 51 is a cylindrical body that forms a water passage 52. The water stop valve body 5 is attached to the tip of the valve body guide 51, and an inlet 53 to the water passage 52 opens at a position behind the attachment portion. At the same time, a fastening protrusion 54 is formed at the tail end to fasten and attach the spring 41. In addition, a bending groove 55 is formed behind the pressure-bonding portion of the water stop valve body 5, and the peripheral end is bent and completely adhered when the water stop valve body 5 is pressure-bonded to the water flow port 44. Has been.

  Supporting tongues 45 that receive and support the lower surface of the meter fitting end 14 are provided on the meter A fitting fitting portions 2a and 2b of the holders 1a and 1b, and the meter end 14 to be fitted is dropped from above. Can be joined to the bonded core.

  6a and 6b are joint attachments that are fitted to the end of the meter A. The primary side joint 6a has a packing mechanism, and the secondary side joint 6b has a built-in check valve unit. The parts 2a and 2b are fitted together via respective joint parts.

  Further, the auxiliary support structure 7 that receives the bottom and end of the water meter A fitted between the holders 1a and 1b and prevents the meter from dropping during fitting work or the like is provided with the connecting support rods 2, 2 on both sides of the holder base. To be provided.

  In the holder base 1 configured as described above, first, the operation handle 43 is rotated to engage the cam mechanism 42 with the engagement protrusion 4b of the fastening cylinder 4 to be in the retracted state, and between the holders 1a and 1b. The meter A is fitted, and the cam mechanism 42 is engaged with the engagement protrusion 4 a of the fastening cylinder 4 by the turning operation of the cam mechanism 42 to advance the fastening cylinder 4, and the meter is applied by the urging force of the spring 41. If the end of A is pressed against the fitting part 2a side of the holder 1a, the water meter A is fastened and fixed between the holders 1a and 1b.

  At the same time, the water passage 44 and the water stop valve body 5 are spaced apart from each other by the amount of advancement of the fastening cylinder 4 to open the water passage, and water from the water meter A is passed through the inlet 53 of the valve body guide 51. It flows into the water passage 52 and flows to the secondary side. Accordingly, when the primary stop cock 3 is opened, the water flow passes through the meter A from the flow path of the holder 1a and flows through the flow path of the holder 1b, and the flow rate and the like are measured.

  For removing the water meter A, when the operation handle 43 is turned in the opposite direction, the cam mechanism 42 is engaged with the engagement protrusion 4b of the fastening cylinder 4 to forcibly retract the fastening cylinder 4. The fastening of the water meter A is released. At the same time, the water stop valve body 5 is in pressure contact with the water flow port 44 of the fastening cylinder 4 and the secondary side pipe opening is closed to prevent backflow or foreign matter from flowing in from the secondary side pipe opening.

  Since the present invention is configured as described above, even in a deep buried type water meter, by rotating the operation handle 43 using a jig, the secondary side water flow opening is closed and backflow is performed. After taking preventive measures, the meter and backflow prevention valve could be removed, and the distance between the faces of the meter holder including the joint part was shortened to avoid loss of water supply pressure. .

  The meter holder for water supply according to the present invention can easily open and close the water passage opening on the secondary side as a meter holder, so that in addition to a normal water meter on the ground, it is buried deep as described above. It has a high utility value in the water supply industry in various forms such as maintenance of a water meter of a type and repair and replacement of members.

DESCRIPTION OF SYMBOLS 1 Holder base main body 1a Primary side holder 1b Secondary side holder 11 Main body support leg part 12 Primary side pipe | tube connection structure part 13 Secondary side pipe | tube connection structure part 14 Meter fitting end 2 Support rod 21 Support rod Fastening blade 2a Primary meter end fitting portion 2b Secondary meter end fitting portion 3 Stop cock unit 4 Fastening tube 4a Fastening cam engagement projection 4b of fastening tube Reversing cam engagement projection 41 of fastening tube Force spring 42 Fastening cylinder advancing and retreating cam mechanism 43 Operation handle 44 Water flow opening 45 of fastening cylinder Metering end support tongue piece 5 Water stop valve body 51 Valve body guide 52 Valve body guide water passage 53 Valve body guide water passage Inlet 54 to the valve body guide spring fixing projection 55 Deflection groove 6a of the water stop valve body Primary side meter end joint part 6b Secondary side meter end joint part 7 Holder base meter auxiliary support structure A For water supply Meter

Claims (1)

In a water meter meter holder that supports a meter end face sandwiched between a pair of opposed primary side holder and secondary side holder, a fastening cylinder that advances and retreats by rotating operation to the secondary side holder and holds the meter end face in a pressure-bonded manner. A water passage that passes at least the inflow port and the inflowing water flow to the secondary side, and a water passage opening between the front end of the water passage and the front end of the fastening tube. A valve body guide provided with a water stop valve body for opening and closing is set, and the fastening cylinder can be engaged with a cam mechanism that allows the fastening cylinder to be advanced and retracted by the turning operation. A meter holder for water supply provided with a mating projection and capable of opening and closing a water passage opening between the water stop valve body and the tip of the fastening cylinder by advancing and retracting the fastening cylinder

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