JP6893053B2 - Duplex meter unit - Google Patents

Description

The present invention relates to a compound meter unit capable of connecting a plurality of water supply meters in parallel.

One water meter is installed per household, but the applicant has installed one water meter M for, for example, four households (four) as shown in FIG. 9, mainly for low-rise apartments such as apartments. A compound meter unit that can be mounted in parallel on one meter box main body 20 is disclosed (Patent Document 1).

That is, in the compound meter unit of Patent Document 1, necessary pipes 23 and 24 including a water stop valve 21 and a check valve 22 are assembled in advance on the primary side and the secondary side of the meter box main body 20 at the time of shipment from the factory. At the site, after the water flow test, the piping work is completed simply by installing the water meter M between the primary side piping 13 and the secondary side piping 14. In addition, by consolidating several water meter Ms into one meter box main body 20, space can be saved compared to installing one water meter M for each household, and moreover, for several households. Can be centrally read. In addition, although the quadruple type is illustrated in FIG. 9, there are also compound meter units such as a double type and a triple type.

Japanese Unexamined Patent Publication No. 2009-293282

The idea of consolidating multiple water supply meters in one base or meter box has never existed, and it was first proposed by the applicant in Patent Document 1, and although functions such as space saving and centralized meter reading are satisfied, it is strong. There was room for improvement in terms of aspects.

That is, the compound meter unit of Patent Document 1 is a unit because a plurality of sets of primary side pipes 23 and secondary side pipes 24 are fixed to the box body 10, that is, the lower basin which is divided into upper and lower parts by bolts or the like. If the detachable portion of the single unit is a crimp type, there is a risk that the branch pipe and the bolt may be deformed due to the elongation stress when connecting the water meter M. In addition, when compressive stress acts on the lower basin due to aging displacement of the ground, there is a risk that similar deformation will occur.

The present invention has been made in view of the above-mentioned problems, and an object of the present invention is to provide a compound meter unit that maintains strength even when a connection stress of a water supply meter or a stress due to ground displacement acts.

In order to achieve the above-mentioned object, in the compound meter unit according to the present invention, one inflow pipe portion on the primary side and a branch pipe having a plurality of tributary pipe portions whose secondary side pipe axes are parallel in the horizontal direction are used. , A plurality of primary side pipes configured to be connectable to the tributary pipes and provided in the same number as the plurality of tributary pipes, and the plurality of primary side pipes so as to be paired on the pipe axis with respect to each of the primary side pipes. A plurality of secondary side pipes provided in the same number as the primary side pipes, and a meter box capable of accommodating the primary side pipes and the secondary side pipes and buried in the ground are provided, and the plurality of primary side pipes are provided. Of the multiple secondary side pipes, the primary side pipe and the secondary side pipe, which are paired on the pipe axis, are united in a state where they are separated by a predetermined distance in the pipe axis direction so as to form a detachable part of the water meter between them. A single unit is formed, and a frame for fixing the unit by fixing a pair of primary side pipes and secondary side pipes on the pipe axis is provided, and the branch pipes and the plurality of units are provided. The primary side pipe and the plurality of secondary side pipes are integrated by connecting the plurality of primary side pipes to a plurality of tributary pipe portions of the branch pipe and fixing the unit alone with the frame. It is characterized by being.

Top view of a compound meter unit showing an embodiment of the present invention FIG. 1 is a cross-sectional view taken along the line AA. Same, left side view Same, right side view BB line sectional view of FIG. Same as above, overall perspective view Explanatory drawing illustrating the mode of the divided frame Side view sectional view showing another embodiment Top view showing a conventional compound meter unit

Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. 1 is a plan view of a compound meter unit showing an embodiment of a triple system, FIG. 2 is a sectional view taken along line AA, FIGS. 3 and 4 are side views on the left and right, and FIG. 5 is a B- of FIG. It is a cross-sectional view of line B. In these figures, 1 is a branch pipe, 2 is a unit unit, and 3 is a metal frame in which the branch pipe 1 and the unit unit 2 are fixed and integrated.

The branch pipe 1 is integrally provided with three tributary pipes 1b on the secondary side so that the pipe axes are parallel to each other with respect to the inflow pipe 1a provided in the center of the primary side, and a flow path is provided. It is branched into three systems. The inflow pipe portion 1a functions as a connection end portion of the primary side water supply pipe.

In the case of this embodiment, the unit unit 2 includes three sets having the same structure, and each includes a primary side pipe 4 including a water stop valve 4a whose end can be fitted into the tributary pipe portion 1b of the branch pipe 1 in a watertight manner. , The secondary side pipe 5 including the check valve unit 5a is provided coaxially at regular intervals. The end portion 5b of the secondary side pipe 5 opposite to the check valve unit 5a functions as a connection end portion of the secondary side water supply pipe (a lead-in pipe into the house). Further, the space between the primary side pipe 4 and the secondary side pipe 5 is a detachable portion of the water supply meter, and in this embodiment, a crimp joint is exemplified as the meter detachable structure. That is, in this crimp joint, when the impeller 4b of the primary side pipe 4 is turned, the rotational movement is converted into the axial sliding movement of the movable receiving portion 4c by the internal mechanism, and the protruding amount of the movable receiving portion 4c is reduced. By adjusting, the distance from the fixed joint 5c provided on the secondary side pipe 5 facing the same is adjusted, and the water meter is attached and detached.

On the other hand, the metal frame 3 is composed of four walls of the front and rear two frames 3a and 3b facing the axial direction of the unit unit 2 and the left and right two frames 3c and 3d facing the row direction of the unit unit 2 as well. It is a frame of shape and has a size that surrounds the row group of the unit unit 2. Then, of the four frames, the branch pipe 1 and the unit unit 2 are fixed to the front and rear two frames 3a and 3b.

Specifically, three mounting holes 3e and 3f are provided coaxially with each of the three rows of unit units 2 in each of the front and rear two frames 3a and 3b. On the other hand, the ends of the tributary pipes 1b of the branch pipe 1, the fitting ends of the primary side pipe 4 of the unit unit 2, and the middle of the secondary side pipe 5 are pushed outward to the left and right. Flange 1c, 4d, and 5d are provided. Then, with the tributary pipe portion 1b of the branch pipe 1 communicating with the mounting hole 3e with respect to the front frame 3a of the metal frame 3, both so that the branch pipe 1 is on the outside and the primary side pipe 4 is on the inside. The flanges 1c and 4d are fixed with bolts 6 with the front frame 3a sandwiched between them. At this time, it goes without saying that 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 can communicate with each other. Further, the secondary side pipe 5 has the check valve unit 5a inserted into the mounting hole 3f from the outside with respect to the rear frame 3b of the metal frame 3, and the flange 5d thereof is fixed with bolts 7. According to such a fixing mode, the entire branch pipe 1 and the end portion 5b of the secondary side pipe 5 project to the outside of the metal frame 3, and the meter attachment / detachment portion of the unit unit 2 is located inside the metal frame 3.

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

In this embodiment, a triple system in which three water supply meters are connected in parallel is shown, and as is well shown in FIG. 6, the metal frame 3 is divided into three correspondingly. That is, in the metal frame 3 in this embodiment, the front and rear two frames 3a and 3b are divided into three in units of mounting holes (units), and a pair of U-shaped side frames 3g and 3h in a plan view are linear in a plan view. It is equipped with two sets of intermediate frames 3i. One set of unit units 2 is fixed to each of the side frames 3g and 3h, and one set of unit units 2 is fixed between the intermediate frames 3i. Then, the side frames 3g and 3h are connected by the intermediate frame 3i, and the connecting portion is fixed by the bolt 8. Although the triple unit is configured by this configuration, it is also possible to directly connect the side frames 3g and 3h to each other, and in this case, the dual unit can be configured. Further, by adding the intermediate frame 3i, it is possible to increase the number of stations such as 4-series and 5-series. It goes without saying that the branch pipe 1 is provided with a tributary pipe portion according to the number of stations.

Since the metal frame 3 is divided into a side frame 3g / 3h and an intermediate frame 3i in this way, the number of intermediate frames 3i can be increased or decreased with the side frame 3g / 3h as the basic frame to increase or decrease the number of intermediate frames 3i. Can be dealt with.

It is convenient to form one end of the connecting portion of each divided frame in an L shape, superimpose the other end on the step, and fix the bolt. FIG. 7 illustrates three variations, and in FIG. 7A, the end portion of one side frame 3g is untreated, and the L-shaped connecting portion 9 is formed at both ends of the other side frame 3h. Is forming. Further, with respect to the intermediate frame 3i, an L-shaped connecting portion 9 is formed only at one end. According to this example, the side frames 3g and 3h can be directly connected to each other to form two stations, or the intermediate frame 3i can be added to form three or more stations.

On the other hand, in the example of FIG. 7B, by adopting the side frame in which only one end is bent into an L shape to form the connecting portion 9, the left and right side frames 3h and 3g are completely the same shape. , A double unit can be configured by directly connecting the connecting portion 9 in a front-rear inverted state, and a triple or more unit can be configured by adding an intermediate frame 3i having the same shape as (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, in the example of (b), since the side frames have the same shape, it becomes a two-part system, which is a necessary split frame. The number of types can be reduced, and parts management becomes easier.

In the example of FIG. 7C, both the side frames 3h and 3g are untreated at the ends, while L-shaped connecting portions 9 are formed at both ends of the intermediate frame 3i. In this example, in the case of a triplet, the side frames 3h and 3g have the same shape, so that a two-part system is configured. However, since the side frames 3h and 3g have the same shape, it is indispensable to use the intermediate frame 3i to make three or more frames.

In this regard, when two or more intermediate frames 3i in the example of (c) are used, as shown in FIG. It is also possible to do. However, if it is 3 stations (odd number of 3 or more), the side frame can be the same shape, but if it is 4 stations (even number of 4 or more), it will be a variant, so it is practically the same as the example of (a) with a 3-part system. You can think about it.

Since the compound meter unit of the present invention is integrated by the metal frame 3, it can be used alone, but when it is buried in the ground, as shown in FIG. 8, the lower box 10 and this are used. It is preferable to house the meter box in a two-divided structure composed of an upper box 11 to be fitted into the meter box. In this case, since the entire unit is only placed on the lower basin 10 and does not need to be fixed with bolts, it is easy to install the unit, and the horizontal leveling can be performed based on the empty lower basin 10.

Further, in the compound meter unit, the upstream is branched and a plurality of rows of primary side pipes are provided, and the same number of rows of secondary side pipes are provided coaxially with each of the primary side pipes to provide a space between the primary side pipes and the secondary side pipes. Assuming that the meter unit is a compound meter unit in which a plurality of water supply meters are connected in parallel as a meter attachment / detachment portion, a configuration can be adopted in which the unit is fixed to a frame having open upper and lower surfaces.

That is, instead of the conventional fixing of the lower basin, in the compound meter unit, as a unit base, a hoop-shaped metal frame having the same number of mounting holes as the number of rows is provided in the front and rear two frames facing each other on the primary side and the secondary side. Be prepared.

In the metal frame, the primary side pipe and the secondary side pipe are fixed to the front and rear two frames so as to communicate with the mounting hole, and the displacement of the primary side pipe and the secondary side pipe is integrated with the front and rear two frames. Restrain with two frames on the left and right. If the front, rear, left and right frames are made of steel, it is convenient to make them plate-shaped, but depending on the type of metal, the number of water meter stations, the cost, etc., it is also possible to make them tubular or deformed pipes. Yes, it is possible to have different shapes for the front, back, left and right.

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

According to this compound meter unit, since the branch pipe and a plurality of unit units are fixed to the metal frame, the connection stress of the water supply meter acting on the unit unit is constrained by the left and right two frames of the metal frame to increase the strength.

By the way, since the compound meter unit is a unit in which two or more water supply meters are connected in parallel, it is necessary to adjust the size (length in the row direction) of the metal frame according to the number of rows. Therefore, an integrated metal frame such as a dedicated metal frame for 2 stations or 3 stations can be adopted.

On the other hand, the front and rear two frames are divided into mounting holes, and a U-shaped side frame in a plan view and an intermediate frame in a straight line in a plan view that can be connected to each other (these are sometimes collectively referred to as a divided frame). If it is composed of and, it is possible to correspond to various numbers of columns depending on the combination. That is, a dual unit can be configured with only one pair of side frames, and a triple or quadruple unit can be configured by adding an intermediate frame between the side frames. If such a divided frame is adopted, the divided frame can be shared by using a pair of side frames as a basic frame, and versatility can be obtained.

Since the metal frame is divided into a side frame and an intermediate frame in this way, it is more versatile and easier to manage parts than preparing an integrated metal frame for each number of rows of water supply meters.

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

In addition, the configuration in which the primary side pipe and the secondary side pipe are fixed to the front and rear two frames of the metal frame is also optional, but it is certain to provide an outward flange and fix this flange with bolts around the mounting hole. And it is simple. Further, it is preferable that the primary side pipe is provided with a water stop valve and the secondary side pipe is provided with a check valve, and these water stop valve and the check valve are fixed so as to be located inside the metal frame.

Further, a branch pipe having a plurality of tributary pipes is provided upstream of the primary side pipe, and also for this branch pipe, an outward flange is provided for each tributary pipe part, and the flanges with the primary side pipe are connected to each other with a front frame. If the branch pipe and the primary side pipe are fixed to the metal frame at the same time by fixing the pipes in the sandwiched state.

If a meter box having a two-divided structure of a lower basin and an upper basin is further provided, and the entire unit is placed and housed in the lower basin, an underground-buried compound meter box can be configured. Here, the entire unit is already integrated by a metal frame, so it is only necessary to place it on the lower basin. Therefore, horizontal leveling can be easily performed by the empty lower basin. Further, since the entire unit and the lower basin are cut off in a non-bonded state, even if stress due to ground displacement acts on the lower basin, it is difficult to be transmitted to the entire unit and the strength of the entire unit is maintained.

In this way, since the lower basin is not fixed to the lower basin of the meter box and is only placed, the influence on the entire unit can be reduced even if the lower basin is displaced by the aging stress of the ground, and the strength is maintained. be able to.

On the other hand, a screw type and a crimping type can be considered as a specific configuration of the meter attachment / detachment part in the unit alone, but a crimping joint in which a movable part movable in the axial direction is provided on either the primary side pipe or the secondary side pipe of the latter 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 piping 1b Tributary pipe 2 Unit unit 3 Metal frame 3g / 3h Side frame 3i Intermediate frame 4 Unit primary side piping 5 Unit unit secondary side piping

Claims (1)

A branch pipe having one inflow pipe portion on the primary side and a plurality of tributary pipe portions whose secondary side pipe axes are parallel in the horizontal direction, and the plurality of tributary pipes configured to be connectable to the tributary pipe portion. A plurality of primary side pipes provided in the same number as the portions, and a plurality of secondary side pipes provided in the same number as the plurality of primary side pipes so as to be paired with each of the primary side pipes on the pipe axis. A meter box that can accommodate the primary side pipe and the secondary side pipe and is buried in the ground is provided.
Of the plurality of primary side pipes and the plurality of secondary side pipes, the primary side pipe and the secondary side pipe paired on the pipe shaft are in the pipe axis direction so as to form a attachment / detachment portion of the water meter between them. It forms a unit unit that is separated by a predetermined distance.
A frame for fixing the unit alone by fixing a pair of primary side pipes and secondary side pipes on the pipe shaft is provided.
In the branch pipe, the plurality of primary side pipes, and the plurality of secondary side pipes, the plurality of primary side pipes are connected to a plurality of tributary pipes of the branch pipe, and the unit alone is fixed by the frame. A compound meter unit that is integrated by doing so.

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