JP2004244865A - Joining structure of meter piping unit - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a joining structure of a meter piping unit for largely reducing labor of piping work at a job site, shortening piping work time, and reducing a labor cost. <P>SOLUTION: This meter piping unit is composed of a branch pipe unit 2 for arranging a plurality of branch pipes 21 and 22 in an inflow pipe 20 having a connecting port connected to a fluid pipe in a building and arranging a shutoff valve 1 and a pressure reducing valve V2 in the branch pipes 21 and 22; relay pipes 3 and 4 having a connecting port connected to the branch pipes 21 and 22 on one end and having a connecting port for connecting weighing meters 7 and 8 on the other end; pipes 5 and 6 with the backflow preventing function having a connecting port connected to the weighing meters 7 and 8 on one end, having a connecting port connected to the fluid pipe in the building on the other end, and provided with a check valve V3; and loading stands 11 and 12 loaded with the relay pipes 3 and 4 and the pipes 5 and 6 with the backflow preventing function. In this joining structure of the meter piping unit, the relay pipes 3 and 4 are rotatably connected to the branch pipes 21 and 22. <P>COPYRIGHT: (C)2004,JPO&NCIPI

Description

[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention relates to a combined structure of a meter piping unit that can replaceably replace a plurality of metering meters connected to a water supply piping system to each dwelling unit, for example, in an apartment house.
[0002]
[Prior art]
In general, in an apartment house, the water supply piping system in each dwelling unit branches a dedicated water supply pipe for each dwelling unit from a water supply standpipe in a common part pipe shaft, and pipes the pipe to each use point in the dwelling unit. Then, in order for the Water Bureau to measure the amount of tap water used in each dwelling unit, a water meter lent by the Water Bureau to each dedicated water supply pipe is installed in the common pipe shaft.
[0003]
In recent years, in water supply facilities in apartment houses, a water pump directly feeds water to each point of use by a water supply pump from a water receiving tank, or tap water drawn from a water main without using a water receiving tank. The mainstream is the water pressure boost system that supplies water to each point of use.
[0004]
In the case of the above-mentioned water supply equipment of the direct pumping system or the direct water supply booster system, the pressure fluctuation due to the increase or decrease of the amount of water used in the supply zone is larger than that of the high water tank system. Therefore, when the control mechanism of the pump breaks down, the supply pressure may increase abnormally. Therefore, in order not to affect the sanitary equipment that supplies water, and to eliminate temperature changes due to water supply pressure fluctuations in showers, etc., a pressure reducing valve is installed in a dedicated water supply pipe in the common pipe shaft, The supply pressure of water supplied to each dwelling unit is not to exceed a certain level.
[0005]
In an apartment house, in general, a pipe shaft is commonly used by two dwelling units, and a meter and a pipe around the meter for two dwelling units are often installed in the pipe shaft. The pipe structure around the meter in this case will be described below in order from the feed water branch pipe branch pipe.
First, a water supply horizontal branch pipe is branched from a water supply standing pipe by a branch joint. Further, the water supply horizontal branch pipe is branched into two dedicated water supply pipes by a branch joint. Then, in the dedicated water supply pipe after branching, a water stop valve (closing valve) for shutting off water supply from the water supply vertical pipe when replacing a water meter or the like and a pressure reducing valve for keeping the water supply pressure at a certain pressure or less are arranged. In this case, the water stop valve and the pressure reducing valve are in a fixed state in a fixed direction (constant direction). The pressure reducing valve has a strainer on the primary side for preventing a failure due to the inflow of foreign matter, and a water meter is connected to the secondary side of the pressure reducing valve. In order to make this water meter a replaceable mounting structure in the event of a failure, a meter connection socket having a detachable structure with a cap nut is arranged at the primary and secondary ends. The meter connection socket has a telescopic function in order to cope with a case where the replacement water meter is different in size from the existing one. The exclusive water supply pipe on the secondary side of the water meter is provided with a check valve to prevent the water remaining in the exclusive water supply pipe in the dwelling unit from flowing out when the water meter is replaced. Further, a connection socket and a short pipe are inserted and connected as needed at a portion where each valve is connected. Then, the dedicated water supply pipe after the check valve is directly piped to the inside of the dwelling unit, and branch pipes are formed in the dwelling unit according to the number of used places. When a water heater is installed in a common pipe shaft, a water pipe for a water heater is often branched from a dedicated water pipe in the common pipe shaft.
[0006]
In recent years, in order to save labor and shorten construction time for on-site construction, reduce labor costs associated with these and reduce the length of piping, unitization of meter piping from water stop valve to check valve has been implemented. It has already begun to be implemented, and it has produced a certain effect.
However, the meter piping unit in this case is a unit for one dwelling unit, and in order to further reduce the on-site work, shorten construction time, and reduce cost, unitize the entire meter piping for two dwelling units. It is originally most desirable.
[0007]
In the hot water supply facilities for middle- and high-rise buildings, hot water from hot water storage tanks and boilers installed in machine rooms and other facilities is circulated throughout the building using circulation pumps and circulation pipes (hot water supply pipes and hot water return pipes). There is a central hot water supply system that branches off inside and supplies hot water to the point of use. In a multiple dwelling house using this method, the hot water supply side pipe (outgoing pipe side) branches off the hot water supply horizontal branch pipe inside the shared pipe shaft, and further branches into the dedicated hot water supply pipe of each dwelling unit, and each dedicated hot water supply pipe In some cases, a water stop valve, a pressure reducing valve, and a meter for measuring the amount of hot water used are installed.
This prior art is a technique generally known to those skilled in the art, and does not relate to the invention disclosed in the literature.
[0008]
[Problems to be solved by the invention]
In recent years, in order to meet the needs of the purchaser, the number of types of housing separation plans within one building has increased in recent years. Accordingly, the types of common pipe shaft shapes have been increasing. When viewed from the inspection door, the common pipe shaft has a shape such as a vertically long shape and a horizontally long shape, and the dimensions are often different even if the shape is the same. In addition, the common pipe shaft of an apartment house has a small area, and there is not enough room for installing piping around the meter. Even if one attempts to produce a meter piping unit for two dwelling units in a factory, one type of unit cannot cope with the shape of each common pipe shaft. Eventually, it is necessary to design for each shape of the common pipe shaft, and there is a problem that the total cost is rather increased as compared with the conventional construction method.
Furthermore, there is a problem in the apartment house used for the central hot water supply system for the same reason as in the case of the water supply system.
[0009]
SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and a piping structure of a meter piping unit can greatly reduce labor required for on-site piping work, thereby shortening the piping work time and reducing labor costs. The purpose is to provide.
[0010]
Another object of the present invention is to provide a connection structure of a meter piping unit that can make the piping length more compact than the conventional on-site piping work and can cope with a narrow pipe shaft space.
[0011]
Furthermore, the present invention improves the degree of freedom in the connection direction of the dedicated water supply pipe to each dwelling unit, and requires a separate branch joint even when branching and supplying water or hot water after the secondary side of the pipe around the metering meter. It is an object of the present invention to provide a connection structure of a meter piping unit that does not require a connection.
[0012]
[Means for Solving the Problems]
A connection structure of a meter piping unit according to the present invention is configured by providing a plurality of branch pipes in an inflow pipe having a connection port connected to a fluid pipe in a building, and disposing a closing valve and a pressure reducing valve in the branch pipe. A branch pipe unit, a relay pipe having a connection port connected to the branch pipe at one end and a connection port connected to a weighing meter at the other end, and a connection port connected to the weighing meter at one end; A piping unit having a connection port for connecting to a fluid pipe in a building and a check valve provided with a check valve, and a loading stand for mounting the relay pipe and the check valve. Wherein the relay pipe is rotatably connected to the branch pipe.
[0013]
In the connection structure of the meter piping unit according to the present invention, the piping with the backflow prevention function has a plurality of connection ports connected to the fluid piping in the building.
[0014]
BEST MODE FOR CARRYING OUT THE INVENTION
Hereinafter, an embodiment of the present invention will be described.
Embodiment 1 FIG.
FIG. 1 is a plan view showing a joint structure of a meter piping unit according to a first embodiment of the present invention, FIG. 2 is a side view in which a part of FIG. 1 is sectioned, FIG. The figure is a cross-sectional view taken along the line AA in FIG. 1, and FIG. 5 is a side view showing the connection structure of the meter piping unit before the installation of the metering meter.
In the figure, 1 is a meter piping unit. The meter piping unit 1 is composed of a branch pipe unit 2, relay pipes 3, 4 and pipes 5, 6 with backflow prevention functions, and loading platforms 11, 12 for loading them. This will be described below.
[0015]
First, the branch pipe unit 2 includes an inflow pipe 20 having a connection port 20a that connects to a fluid pipe in the building (for example, a water supply horizontal branch pipe branched from a water supply vertical pipe installed in a common pipe shaft of an apartment house). A plurality of (two in the figure) branch pipes 21 and 22 integrally formed with the inflow pipe 20, and a shutoff valve (water shutoff valve) V1 and a pressure reducing valve V2 disposed in each of the branch pipes 21 and 22. The main part is composed of. In addition, a strainer 23 is provided in the inflow pipe 20 to prevent foreign matter from flowing into the branch pipes 21 and 22 to prevent failure of the shutoff valve V1 and the pressure reducing valve V2.
[0016]
In the branch pipes 21 and 22, a pressure reducing valve V2 is disposed downstream of the shutoff valve V1, and pin holes 21a and 22a for inserting a U-shaped fixing pin P1 from outside are provided in the mounting portion of the pressure reducing valve V2. (Only one pin hole 21a is shown in the figure), and a pressure reducing valve V2 is fixedly mounted by a U-shaped stopper pin P1 inserted and removed from these pin holes 21a and 22a. The pressure reducing valve V2 can be removed by pulling out the retaining pin P1. Therefore, maintenance and replacement of the pressure reducing valve V2 can be easily performed.
[0017]
Further, the branch pipes 21 and 22 have downward pipe connection ports 21b and 22b. The primary connection ports of the relay pipes 3 and 4 made of elbows are respectively connected to the pipe connection ports 21b and 22b. It is movably connected. More specifically, as shown in FIG. 3, a seal ring groove 31 is provided on the outer peripheral surface of the primary connection port of the relay pipe 3. The primary connection port of the pipe 3 and the pipe connection port 21b of the branch pipe 21 are kept watertight.
[0018]
A pin hole (not shown) for inserting a U-shaped fixing pin P2 from the outside is provided at a connection portion between one of the pipe connection ports 21b of the branch pipe unit 2 and the relay pipe 3. A U-shaped stopper pin groove 33 is provided on the primary outer peripheral surface. The U-shaped stopper pin P2 is driven into the U-shaped stopper pin groove 33 from the pin hole to prevent the relay pipe 3 from falling off. I'm trying.
[0019]
Further, a rubber seal ring 34, a metal ring-shaped pin P3, and a cap nut N1 are provided at the secondary pipe end of the relay pipe 3, and the meter 7 or the substitute pipe 9 is provided by the cap nut N1. The primary side (see FIG. 5) is detachably connected to the secondary side of the relay pipe 3.
[0020]
The above is the connection structure of the one pipe connection port 21b of the branch pipe unit 2, the one relay pipe 3, and the one metering meter 7 or the substitute pipe 9, but the other pipe connection port 22b of the branch pipe unit 2 The connecting structure between the other relay pipe 4 and the other metering meter 8 or the substitute pipe 10 is also the same as the one connecting structure.
[0021]
On the loading frames 11 and 12, pipes 5 and 6 with backflow prevention functions are mounted at positions spaced apart from the relay pipes 3 and 4 with respect to the secondary connection ports. The detailed structure will be described below.
The pipes 5 and 6 having the backflow prevention function have substitute pipes 9 and 10 or metering meters 7 and 8 at one end and fluid pipes in the building at the other end (water supplied from the metering meters 7 and 8 is supplied to the dwelling unit). Since the pipes 5 and 6 with the backflow prevention function have the same structure, only the detailed structure of one of the pipes 5 with the backflow prevention function will be described. I do.
[0022]
That is, as shown in FIG. 1 to FIG. 4, the pipe 5 with the backflow prevention function includes a primary connection pipe part 51 connected to the secondary side of the metering meter 7 and a secondary side of the metering meter 7 used in a dwelling unit. It has a plurality of (four in the figure) connection ports 52 to 55 for connecting the fluid pipes to the point. Inside the pipe 5 with the backflow prevention function, a check valve V3 is disposed in the primary connection pipe 51, and the primary connection pipe 51 in the pipe 5 with the backflow prevention function is provided with a secondary valve. The secondary tube 9 or the secondary side of the metering meter 7 is detachably connected to the substitute tube 9 or the metering meter 7 through the side meter connection tube (straight tube) 13 by the cap nut N2.
[0023]
Here, the secondary-side meter connection pipe 13 is capable of expanding and contracting with respect to the primary-side connection port pipe part 51 of the pipe 5 with the backflow prevention function. The length can be adjusted. The secondary meter connection pipe 13 has a rubber seal ring 16 and a metal ring pin P4 on the primary side, and a seal ring groove 14 provided on the secondary side. Has a seal ring 15 attached thereto.
[0024]
As shown in FIG. 5, the meter piping unit 1 configured as described above is connected to the secondary side of the relay pipes 3 and 4 and the primary side of the secondary connection pipe section 13 of the pipes 5 and 6 with the backflow prevention function. After connecting the substitute pipes 9 and 10 between them, the right and left pipe units of the relay pipes 3 and 4 and the pipes 5 and 6 with the backflow prevention function and the substitute pipes 9 and 10 and the loading frames 11 and 12 are connected to the relay pipes. By rotating around the connection between the primary side of the pipes 3 and 4 with the pipe connection sections 21b and 22b, the left and right pipe units are delivered to the site in a state of being folded in a parallel direction as shown in FIG. You.
[0025]
At the site, after installing the meter pipe unit 1 in a folded state at a predetermined position in the pipe shaft, the left and right pipe units of the meter pipe unit 1 are opened as shown in FIG. Fixed to the floor. In this state, the connection port 20a of the inflow pipe 20 of the branch pipe unit 2 is connected to the fluid pipe in the building with a cap nut (not shown), and the secondary connection ports of the pipes 5 and 6 with backflow prevention function. At least one of the connection ports 52 to 55 is connected to a pipe reaching a use point in the dwelling unit. In addition, among the secondary connection ports 52 to 55, those not connected to a pipe are stopped by a plug or the like. After the hydraulic pressure test and the flushing (cleaning) of the inside of the pipes are completed, the substitute pipes 9 and 10 are removed, and the secondary side of the relay pipes 3 and 4 and the secondary side meter connection pipes 13 of the pipes 5 and 6 with the backflow prevention function are provided. The weighing meters 7 and 8 are connected to the primary side by the cap nuts N1 and N2, and the piping is completed.
[0026]
In the above, the meter piping unit 1 is installed at a predetermined position in the pipe shaft in a state where the left and right piping units are folded in the parallel direction as shown in FIGS. 7 and 8, and the metering meters 7, 8 are connected in this state. It is also possible. Further, the meter piping unit 1 adjusts the opening angle of the left and right piping units (measuring meters 7 and 8) in accordance with the condition of the piping to the place of use in the dwelling unit and connects the piping to the place of use in the dwelling unit. It is also possible.
[0027]
【The invention's effect】
As described above, according to the present invention, a plurality of branch pipes are provided in an inflow pipe having a connection port connected to a fluid pipe in a building, and a closing valve and a pressure reducing valve are provided in the branch pipe. A pipe unit, a connection pipe connected to the branch pipe at one end, a relay pipe having a connection port connected to the weighing meter at the other end, a connection port connected to the weighing meter at one end, and a connection port at the other end. Having a connection port connected to a fluid pipe in the building, and a pipe with a backflow prevention function in which a check valve is disposed, and a meter pipe unit configured by a loading stand for loading the relay pipe and the pipe with a backflow prevention function; In the present invention, the inflow pipe, branch joint, branch pipe, pressure reducing valve, shutoff valve, etc., which had to be individually constructed on site at the site, are unitized in the present invention because the meter piping unit consists of Can this Because, the site can be labor-saving greatly installing the piping in, there is an effect that can be reduced in the short-term reduction and labor costs of construction time. Further, the unitization has an effect that the piping length can be made smaller than in the conventional on-site piping work, and it is possible to cope with a narrower pipe shaft space than before.
[0028]
In particular, according to the present invention, since the branch pipe and the relay pipe are configured to be rotatably connected, an effect that the degree of freedom in the installation position of each meter pipe unit on the plane of the shared pipe shaft is improved. is there. As a result, there is an effect that it is possible to cope with various types of pipe shaft shapes with a meter pipe unit coupling structure having the same specification. As described above, since it is possible to cope with various types of pipe shaft shapes, it is possible to greatly reduce the number of types of specifications of the meter piping unit connection structure manufactured at the factory, and it is possible to reduce the manufacturing cost. Furthermore, since the branch pipe and the relay pipe have a rotatable connection structure, inventory storage and transport to the site can be easily performed in a state where the meter piping unit is compactly folded. This also has the effect of making maintenance easier.
[0029]
Further, according to the present invention, since a plurality of connection ports to which a plurality of fluid pipes can be connected are provided on the secondary side of the pipe with the backflow prevention function, the degree of freedom in the connection direction of the dedicated water supply pipe is improved. effective. In addition, there is an effect that it is not necessary to separately prepare a branch joint even when water is branched into a plurality of portions after the secondary side of the pipe with the backflow prevention function.
[Brief description of the drawings]
FIG. 1 is a plan view showing a connection structure of a meter piping unit according to Embodiment 1 of the present invention.
FIG. 2 is a side view in which a part of FIG. 1 is sectioned.
FIG. 3 is an enlarged sectional view of a main part of FIG. 2;
FIG. 4 is a sectional view taken along line AA of FIG. 1;
FIG. 5 is a side view showing the meter piping unit before the installation of a weighing meter.
FIG. 6 is a plan view showing a state where the meter piping unit of FIG. 5 is folded.
FIG. 7 is a plan view showing a state in which the meter piping unit of FIG. 1 is folded after the meter is installed.
FIG. 8 is a front view of FIG. 7;
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Meter piping unit 2 Branch pipe unit 3 and 4 Relay piping 5 and 6 Piping with backflow prevention function 7 and 8 Metering meter 9 and 10 Substitute pipes 11 and 12 Mounting rack 13 Secondary meter connection pipe 14 Seal ring groove 15 16 Seal ring 20 Inflow pipe 20a Connection ports 21, 22 Branch pipes 21a, 22a Pin holes 21b, 22b Pipe connection port 23 Strainer 31 Seal ring groove 32 Seal ring 33 U-shaped stop pin groove 34 Seal ring 51 Primary connection pipe Portions 52 to 55 Secondary connection ports N1, N2 Cap nuts P1, P2 U-shaped stop pins P3, P4 Ring-shaped pin V1 Shut-off valve V2 Pressure reducing valve V3 Check valve

Claims (2)

A branch pipe unit including a plurality of branch pipes provided in an inflow pipe having a connection port connected to a fluid pipe in a building, and a shutoff valve and a pressure reducing valve arranged in the branch pipe; and a connection connected to the branch pipe. A relay pipe having a port at one end and a connection port connected to a weighing meter at the other end, a connection port connected to the weighing meter at one end, and a connection port connected to a fluid pipe in the building at the other end. In a joint structure of a meter piping unit comprising a piping with a backflow prevention function having a backflow prevention valve, and a meter piping unit configured by a loading stand for loading the relay piping and the piping with a backflow prevention function, A connection structure of a meter piping unit, wherein the relay piping is rotatably connected to the branch pipe. The connection structure for a meter piping unit according to claim 1, wherein the piping with a backflow prevention function has a plurality of connection ports that connect to fluid piping in the building.

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