JP7112777B2 - How to install a dual meter unit - Google Patents

Description

TECHNICAL FIELD The present invention relates to a construction method for a dual meter unit that allows a plurality of water meters to be connected in parallel.

One water meter is installed in one household, but the applicant mainly installs one water meter M for four households (four) as shown in FIG. A dual meter unit that can be mounted in parallel on one meter box main body 20 is disclosed (Patent Document 1).

That is, in the duplex meter unit of Patent Document 1, necessary pipes 23 and 24 including a stop cock 21 and a check valve 22 are pre-assembled to the primary and secondary sides of the meter box main body 20 at the time of shipment from the factory. At the site, the piping work is completed only by attaching the water meter M between the primary side pipe 13 and the secondary side pipe 14 after the water flow test. In addition, by consolidating several water meters M into one meter box main body 20, space can be saved more than installing one water meter M for each household. can be centrally read. Note that FIG. 9 illustrates a quadruple meter unit, but there are also double meter units such as double and triple meter units.

JP 2009-293282 A

The idea of consolidating a plurality of water meters into one base or meter box did not exist until then, and the applicant of the present application proposed it for the first time in Patent Document 1. Although it satisfies functions such as space saving and centralized meter reading, it is strong. There was room for improvement.

That is, in the duplex meter unit of Patent Document 1, a plurality of sets of primary side pipes 23 and secondary side pipes 24 are fixed to the box main body 10, i. If the detachable portion of the single unit is of the crimping type, there is a possibility that the branch pipe and the bolt may be deformed due to the extensional stress when connecting the water meter M. In addition, when compressive stress acts on the lower trough due to secular displacement of the ground, there is a risk of similar deformation occurring.

SUMMARY OF THE INVENTION The present invention has been made in view of the above problems, and its object is to provide a construction method for a dual meter unit that maintains its strength even when the connection stress of a water meter and the stress due to ground displacement act. is.

In order to achieve the above-mentioned object, in the construction method of the dual meter unit according to the present invention, there is provided a branch pipe having one inflow pipe portion on the primary side and a plurality of branch pipe portions with parallel pipe axes on the secondary side. , a plurality of primary side pipes configured to be connectable to the tributary pipe portions and provided in the same number as the plurality of tributary pipe portions; a plurality of secondary side pipes provided in the same number as the primary side pipes; and a meter box having a water meter, wherein, of the plurality of primary side pipes and the plurality of secondary side pipes, the primary side pipes and the secondary side pipes that are paired on the pipe axis are attached and detached between them. In order to form a part, a unit unit is formed in a state separated by a predetermined distance in the pipe axis direction, and the primary side pipe and the secondary side pipe that are paired on the pipe axis are fixed by fixing the A construction method for a dual meter unit provided with a frame for fixing unit units, comprising a horizontal leveling step of performing horizontal leveling using the lower measure as a reference, and after the horizontal leveling step, the plurality of unit units are installed. The single unit and the frame are accommodated in the meter box so as to be horizontally aligned.

A plan view of a dual meter unit showing an embodiment of the present invention. AA line sectional view of FIG. Same, left side view Same, right side view BB line sectional view of FIG. Overall perspective view of the same Explanatory drawing exemplifying the aspect of the divided frame Side sectional view showing another embodiment Plan view showing a conventional dual meter unit

Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. FIG. 1 is a plan view of a dual meter unit showing a triple type embodiment, FIG. 2 is a cross-sectional view along line AA, FIGS. 3 and 4 are left and right side views, and FIG. It is a B line sectional view. In these figures, 1 is a branch pipe, 2 is a single unit, and 3 is a metal frame that fixes and integrates the branch pipe 1 and the single unit 2 together.

The branch pipe 1 is composed of an inflow pipe portion 1a provided in the center of the primary side and three branch pipe portions 1b integrally provided on the secondary side so that the pipe axes are parallel to each other. It is branched into 3 systems. The inflow pipe portion 1a functions as a connecting end portion of the primary side water supply pipe.

In the case of this embodiment, the single unit 2 includes three sets of units having the same structure, each of which includes a primary side pipe 4 including a stopcock 4a whose end can be watertightly fitted into the tributary pipe portion 1b of the branch pipe 1. , and the secondary pipe 5 including the check valve unit 5a are coaxially spaced apart from each other. An end portion 5b of the secondary side pipe 5 on the side opposite to the check valve unit 5a functions as a connection end portion of the secondary side water supply pipe (a lead-in pipe to the house). A detachable portion of the water meter is provided between the primary side pipe 4 and the secondary side pipe 5, and in this embodiment, a crimp joint is exemplified as the meter detachable structure. That is, when the impeller 4b of the primary pipe 4 is rotated, this crimp joint converts the rotational motion into axial sliding motion of the movable receiving portion 4c by the internal mechanism, and the amount of protrusion of the movable receiving portion 4c is adjusted. By adjusting, the distance to the fixed joint 5c provided on the secondary side pipe 5 opposite to this is adjusted, and the water meter is attached and detached.

On the other hand, the metal frame 3 is a rectangular frame in a plan view consisting of four walls, two front and rear frames 3a and 3b facing each other in the axial direction of the single unit 2 and two left and right frames 3c and 3d facing each other in the row direction of each single unit 2. It is a frame having a shape and is sized to surround the row group of the single units 2 . Of the four frames, the branch pipe 1 and the single unit 2 are fixed to the front and rear two frames 3a and 3b.

Specifically, each of the two front and rear frames 3a and 3b is provided with three mounting holes 3e and 3f coaxially with each of the three rows of unit units 2, respectively. On the other hand, the end portions of the tributary pipe portions 1b of the branch pipe 1, the fitting end portion of the primary side pipe 4 of the single unit 2, and the middle of the secondary side pipe 5 protrude outward to the left and right. Flanges 1c, 4d and 5d are provided. Then, with respect to the front frame 3a of the metal frame 3, with the tributary pipe portion 1b of the branch pipe 1 communicating with the mounting hole 3e, the branch pipe 1 is placed outside and the primary pipe 4 is placed inside. The flanges 1c and 4d are fixed with bolts 6 with the front frame 3a sandwiched therebetween. At this time, the fitting portion of the primary side pipe 4 is watertightly fitted into the tributary pipe portion 1b of the branch pipe 1, so that the two communicate with each other. Further, the secondary pipe 5 is fixed to the rear frame 3b of the metal frame 3 with bolts 7 on the flange 5d with the check valve unit 5a inserted into the mounting hole 3f from the outside. With such a fixing mode, the entire branch pipe 1 and the end portion 5b of the secondary pipe 5 protrude outside the metal frame 3, and the meter attaching/detaching portion of the single unit 2 is positioned inside thereof.

Therefore, when a water meter is attached to each unit unit 2, the connection stress acting on the primary side pipe 4 and the secondary side pipe 5 is transmitted to the two front and rear frames 3a and 3b. Since the displacement is constrained by 3d, deformation of the connection portion can be prevented.

In this embodiment, a triple system is shown in which three water meters are connected in parallel, and the metal frame 3 is divided into three correspondingly, as well shown in FIG. That is, the metal frame 3 in this embodiment has two front and rear frames 3a and 3b divided into three by each mounting hole (unit unit), and a pair of U-shaped side frames 3g and 3h in plan view. and two sets of intermediate frames 3i. A set of single units 2 is fixed to each of the side frames 3g and 3h, and a set of single units 2 is fixed between the intermediate frames 3i. The side frames 3g and 3h are connected by an intermediate frame 3i, and bolts 8 are used to fix the connecting portion. Although this configuration constitutes a triple unit, it is also possible to directly connect the side frames 3g and 3h, in which case a double unit can be constructed. Also, if intermediate frames 3i are added, it is possible to increase the number of stations to four or five. Of course, the branch pipe 1 may be provided with tributary pipe portions corresponding to the number of stations.

Since the metal frame 3 is divided into the side frames 3g and 3h and the intermediate frame 3i in this way, by increasing or decreasing the number of the intermediate frames 3i with the side frames 3g and 3h as the basic frame, it is possible to increase or decrease the number of stations such as two or three. can correspond to

It is convenient to form one end of the connecting portion of each divided frame into an L shape, overlap the other end on the step, and fix the connecting portion with bolts. FIG. 7 illustrates three variations. In FIG. 7(a), one side frame 3g has an untreated end, and the other side frame 3h has an L-shaped connecting portion 9 at both ends. forming Further, the intermediate frame 3i has an L-shaped connecting portion 9 only at one end. According to this example, the side frames 3g and 3h can be directly connected to form two series, or the intermediate frame 3i can be added to form three or more series.

On the other hand, in the example of FIG. 7(b), by adopting a side frame that is formed into a connecting portion 9 by bending only one end into an L shape, the left and right side frames 3h and 3g have completely the same shape. A double unit can be constructed by directly connecting the connecting part 9 in a state of front-rear inversion, and a triple or more unit can be constructed by adding an intermediate frame 3i having the same shape as in (a). . That is, while the example of (a) is a three-part system consisting of a pair of odd-shaped side frames and an intermediate frame, the example of (b) is a two-part system because the side frames are of the same shape. The number of types of parts can be reduced, and parts management becomes easier.

In the example of FIG. 7(c), the side frames 3h and 3g have untreated ends, while the intermediate frame 3i has L-shaped connecting portions 9 at both ends. In this example, since the side frames 3h and 3g have the same shape in the case of three series, a two-part system is constructed. However, since the side frames 3h and 3g have the same shape, it is essential to use the intermediate frame 3i to form three or more.

In this respect, when two or more intermediate frames 3i in the example of (c) are used, as shown in FIG. It is also possible to However, the side frame can be the same shape if it is 3 (odd number of 3 or more), but if it is 4 (even number of 4 or more) it will be a different shape. It's okay to think about it.

Since the duplex meter unit of the present invention is integrated by the metal frame 3 , it can be used alone. It is preferable to store in a meter box having a two -part structure consisting of an upper box 12 to be fitted therewith. In this case, the entire unit is simply placed on the lower sill 1-1 , and there is no need to fix it with bolts.

Further, in the dual meter unit, the upstream is branched to provide a plurality of rows of primary side pipes, and the same number of rows of secondary side pipes are provided coaxially with each of the primary side pipes to connect the primary side pipes and the secondary side pipes. Assuming that the meter attachment/detachment unit is a dual meter unit in which a plurality of water meters are connected in parallel, it is possible to employ a configuration in which the unit is integrated by fixing it to a frame body having an open top and bottom surface.

That is, in place of the conventional lower trough fixing, the dual meter unit uses a hoop-shaped metal frame as the unit base. Prepare.

The metal frame is fixed to each of the two front and rear frames so that the primary side pipe and the secondary side pipe are communicated with the mounting hole, and the displacement of the primary side pipe and the secondary side pipe is integrated with the two front and rear frames. Constrain with two frames, left and right. If the front, rear, left, and right frames are made of steel, it is convenient to use a plate-like shape, but it is also possible to use a tubular shape or a deformed pipe, etc., depending on the type of metal, the number of water meter stations, and the cost. It is also possible to make the front, back, left, and right have different shapes.

In the above means, the connection stress of the water meter acts perpendicularly on the front and rear frames, but since the displacement of the front and rear frames is constrained by the left and right frames, axial deformation and twist due to the stress can be prevented.

According to this duplex meter unit, since the branch pipes and a plurality of unit units are fixed to the metal frame, the connection stress of the water meter acting on the unit unit is constrained by the left and right frames of the metal frame, increasing the strength.

By the way, since the duplex meter unit is a unit in which two or more water meters are connected in parallel, it is necessary to match the size of the metal frame (the length in the row direction) according to the number of rows. Therefore, it is possible to adopt an integrated metal frame such as a double-station exclusive or a triple-station exclusive.

On the other hand, the front and rear frames are divided by the mounting hole unit, and the U-shaped side frame and the linear intermediate frame in plan view that can be connected to each other (these are sometimes collectively referred to as divided frames). , it is possible to deal with various numbers of columns depending on the combination. That is, only a pair of side frames can constitute a double unit, and if an intermediate frame is added between the side frames, a triple or quadruple unit can be constructed. By adopting such a divided frame, a pair of side frames can be used as a basic frame, and the divided frame can be shared, and versatility can be provided.

Since the metal frame is divided into the side frame and the intermediate frame in this way, the versatility is higher and the parts management is easier than when an integrated metal frame is prepared for each row of water meters.

The structure for connecting the divided frames is arbitrary, but if one end is formed in an L shape, the other end can be superimposed on the step and connected.

In addition, it is optional to fix the primary pipe and secondary pipe to the front and rear frames of the metal frame, but it is more reliable to provide an outward flange and fix this flange around the mounting hole with bolts. and simple. Moreover, it is preferable that the primary side pipe is provided with a stopcock and the secondary side pipe is provided with a check valve, and these stopcock and check valve are fixed so as to be positioned inside the metal frame.

Furthermore, a branch pipe having a plurality of tributary pipe portions is provided upstream of the primary pipe, and this branch pipe is also provided with an outward flange for each of the tributary pipe portions, and the flanges of the primary pipe are separated from each other by the front frame. If bolts are fixed in a sandwiched state, the branch pipe and the primary side pipe can be fixed to the metal frame at the same time.

By further providing a meter box having a two-part structure consisting of a lower and an upper box, and placing and accommodating the entire unit in the lower box, it is possible to construct an underground double meter box. Since the entire unit is already integrated with the metal frame, it is only necessary to place it on the lower masu. Therefore, horizontal leveling can be easily carried out with an empty bottom measure. In addition, since the entire unit and the lower mound are not connected and the edge is cut off, even if the stress due to the ground displacement acts on the lower mast, it is difficult to transmit it to the whole unit, and the strength of the whole unit is maintained.

In this way, since it is only placed on the lower box of the meter box without being fixed, even if the lower box is displaced by the stress of the ground over time, the effect on the entire unit can be reduced and the strength is maintained. be able to.

On the other hand, as the specific configuration of the meter attachment/detachment part in a single unit, a screw type and a crimp type are conceivable. It is preferable because it is easy to attach and detach the water meter. The connection stress of the water meter generated at this time is suppressed by the metal frame.

1 branch pipe 1b tributary pipe 2 single unit 3 metal frame 3g, 3h side frame 3i intermediate frame 4 primary side pipe for single unit 5 secondary side pipe for single unit

Claims (1)

A branch pipe having one inflow pipe portion on the primary side and a plurality of branch pipe portions having parallel pipe axes on the secondary side, and a branch pipe configured to be connectable to the branch pipe portions, the same number as the plurality of branch pipe portions. a plurality of primary side pipes provided; a plurality of secondary side pipes provided in the same number as the plurality of primary side pipes so as to form pairs on the pipe axis with respect to each of the primary side pipes; a meter box configured to accommodate the pipe and the secondary side pipe so as to be embedded in the ground, and having a lower measure and an upper measure fitted to the lower measure;
Among the plurality of primary side pipes and the plurality of secondary side pipes, the primary side pipes and the secondary side pipes that are paired on the pipe axis are arranged in the pipe axis direction so as to form a detachable portion of the water meter therebetween. It forms a single unit unitized in a state separated by a predetermined distance,
A method for constructing a dual meter unit comprising a frame for fixing the single unit by fixing the primary side pipe and the secondary side pipe that are paired on the pipe axis,
including a horizontal leveling step of performing horizontal leveling based on the lower measure;
After the horizontal leveling step, the multiple meter unit installation method accommodates the unit units and the frame in the meter box so that the plurality of unit units are horizontally aligned.

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