JP5777097B2 - Pressure test method for water supply vertical pipes in apartment houses - Google Patents

Description

The present invention relates to a pressure test method for a water supply standpipe of an apartment house .

A first part having a water stop valve or a water stop valve and a pressure reducing valve, a second part having a water meter support member and a check valve, and an elbow connecting the first part and the second part, Patent Document 1 discloses a water meter installation unit in which a first portion, a second portion, and an elbow are integrally connected.

JP2007-322387A

In a multi-story apartment house, water is supplied from a water supply pipe arranged in a pipe shaft to a pipe in the house through a water meter. A short branch pipe that is an outlet to the water meter is horizontally connected to the water supply pipe.
A pressure test is performed on the water supply standpipe. It is necessary to block the branch pipe during the pressure test. Conventionally, after installing a water meter installation unit, connecting the first part of the water meter installation unit and the branch pipe of the water supply standpipe, close the water stop valve of the water meter installation unit, and I was testing.
For this reason, a water meter installation unit must be installed on all floors where water is supplied from the water supply standpipe and the first part of the water meter installation unit and the branch pipe of the water supply standpipe are not connected by piping. There was a problem that the pressure test of the pipe could not be performed and the construction period of waterworks was prolonged.
In addition, for the purpose of axial alignment of the downstream end of the pipe connected to the branch pipe of the water supply vertical pipe and the upstream end of the first part of the water meter installation unit, the branch pipe of the water supply vertical pipe, There may be a need to arrange a total of three elbows, two elbows bent in the horizontal plane and one elbow bent in the vertical plane between the pipes connected to the branch pipe. The construction cost was rising.
In addition, when connecting the first part of the water meter installation unit and the branch pipe of the water supply stand with piping, the piping has been cut and processed in the field, resulting in variations in construction quality and problems such as water leakage. May occur.
This invention is made | formed in view of the said problem, and it aims at providing the pressure | voltage resistant test method of the water supply vertical pipe of an apartment house which can solve the said various problems.

In order to solve the above problems, in the present invention, a first part having a water stop valve or a water stop valve and a pressure reducing valve, a second part having a water meter support member and a check valve, and flexibility A pipe member having one end connected to the first portion and the other end connected to the second portion via a one-touch watertight joint or a cap nut type watertight joint having a detachable female coupler and a male coupler. The first portion of the water meter installation unit is connected to the water supply standpipe of the apartment house, the water stop valve of the first part is closed, and the internal space of the water supply standpipe is pressurized. Providing a pressure test method for water supply vertical pipes in apartment buildings .
In the pressure test method for the water supply standpipe according to the present invention, the pressure test of the water supply standpipe can be performed before the installation of the water meters on all the floors of the apartment house is completed. As a result, it is possible to avoid lengthening the construction period of waterworks when constructing a housing complex.
The water meter installation unit is separated into the first part, the second part, and the pipe member that is the connecting part between them, and the first part is connected to the branch pipe of the water supply stand at all floors, and the first part is stopped. If the water valve is closed, the pressure test of the water supply standpipe can be performed before the installation of the water meter installation unit is completed on all floors. Thereby, the construction period extension of waterworks can be avoided.
After connecting the first part to the branch pipe of the water supply vertical pipe and installing the second part on the floor near the water supply vertical pipe, the pipe members are connected to each other. If the length is allowed to be widened, the pipe member is appropriately bent in accordance with the positional relationship between the branch pipe of the water supply vertical pipe and the upstream end of the second portion, and the axial center of the downstream end of the pipe member is the second. It can be aligned with the axial center of the upstream end of the part, and both can be connected. As a result, it is possible to use only an elbow that bends in the vertical plane between the branch pipe of the water supply standpipe and the pipe member connected to the branch pipe, avoiding an increase in waterworks construction costs. it can.
Since the pipe member is connected to the first part and the second part via a one-touch watertight joint or a cap nut type watertight joint, the pipe member is separated from the first part and the second part, and again the first part and When connecting to the second part, it is not necessary to cut or process the pipe member. As a result, variations in construction quality can be avoided, and occurrence of problems such as water leakage can be avoided.

In the preferable aspect of this invention, the connection part of a pipe member and a 1st part and / or the connection part of a 2nd part have a slide joint.
In the preferable aspect of this invention, the connection part of a pipe member and a 1st part and / or the connection part of a 2nd part have a bend which can be swung.
In the preferable aspect of this invention, the connection part of a pipe member and a 1st part and / or the connection part of a 2nd part have an elbow which can be swung.
By providing a slide joint at the connection, or by providing a bend or elbow that can be swung, the variation in relative position between the branch pipe of the water supply stand and the installation position of the second part of the water meter installation unit is ensured. It becomes possible to cope with.
In a preferred embodiment of the present invention, the first portion is connected to the water supply pipe in the apartment house pipe shaft through one elbow whose one end is directed downward.
If the flexible pipe member has a sufficient length, there will be some variation in the relative position between the branch pipe of the first partial water supply vertical pipe and the installation position of the second part of the water meter installation unit. Even if it exists, a pipe member can be bent appropriately and the axis of the downstream end part of a pipe member can be matched with the axis of the upstream end of the 2nd part, and both can be connected. Therefore, the elbow disposed between the branch pipe of the water supply vertical pipe and the pipe member connected to the branch pipe can be only an elbow bent in the vertical plane.

It is a block diagram of the water meter installation unit used with the pressure | voltage resistant test method of the water supply vertical pipe of the apartment house which concerns on the Example of this invention. It is a partial structure figure of the water meter installation unit used with the pressure resistance test method of the water supply vertical pipe of the apartment house concerning the example of the present invention. It is a partial structure figure of the water meter installation unit used with the pressure resistance test method of the water supply vertical pipe of the apartment house concerning the example of the present invention.

The pressure resistance test method of the water supply vertical pipe of the apartment house which concerns on the Example of this invention is demonstrated .
As shown in FIG. 1, the water meter installation unit A includes a first part 1 having a water stop valve 1a and a pressure reducing valve 1b, a second part 2 having a water meter support member 2a and a check valve 2b, And a pipe member 3.
The water stop valve 1a of the 1st part 1 is arrange | positioned upstream from the pressure-reduction valve 1b regarding the water flow at the time of water meter operation. The first portion 1 includes a female coupler 1c and a female coupler 1d that constitute a part of the one-touch watertight joint at the upstream end and the downstream end with respect to the water flow.
The second portion 2 includes an elbow 2c and a bend 2d at the upstream end with respect to the water flow during operation of the water meter, and a connection portion 2e with an indoor pipe (not shown) at the downstream end with respect to the water flow. The downstream end of the elbow 2c is connected to the water meter support member 2a so that the second portion 2 is installed on the horizontal floor surface E of the apartment house pipe shaft B so as to be able to swing around the horizontal axis. The downstream end of the bend 2d is connected to the upstream end of the elbow 2c so as to be rotatable around the central axis of the upstream end of the elbow 2c. The bend 2d includes a female coupler 2f that forms a part of the one-touch watertight joint at the upstream end.
The pipe member 3 is a three-layer flexible aluminum three-layer pipe having a resin inner and outer layers and an aluminum intermediate layer. The pipe member 3 includes a male coupler 3a and a male coupler 3b constituting part of the one-touch watertight joint at the upstream end and the downstream end with respect to the water flow when the water meter is in operation.

The installation procedure of the water meter installation unit A will be described.
A vertically extending water supply pipe C is disposed in the pipe shaft B of the multi-layered housing complex. A short pipe C1 is inserted in a portion extending in each floor of the water supply standpipe C, and one end of a short branch pipe C2 extending horizontally is connected to the short pipe C1. The branch pipe C2 includes a female coupler C3 that forms a part of the one-touch watertight joint at the other end.
The water meter installation unit A is brought into the construction site of a multi-layer apartment house in a state where the water meter installation unit A is separated into the first part 1, the second part 2 and the pipe member 3.
On all floors of multi-story apartment buildings, one end of the elbow D having male couplers D1 forming both ends of the one-touch watertight joint is connected to the female coupler C3 of the branch pipe C2 with one touch, and the other end of the elbow D is vertically connected. Point down. The female coupler 1C of the first part 1 of the water meter installation unit A is connected to the male coupler D1 at the other end of the elbow D by one-touch connection.
After closing the water stop valve 1a of the 1st part 1 of a multi-layered apartment building all floors, the pressure test of the water supply pipe C is performed.
After confirming that the water supply pipe C is not leaking water, the second part 2 of the water meter installation unit A is placed on the horizontal floor E in the pipe shaft B near the water supply pipe on all floors of the multi-layer apartment building. Install. The elbow 2c is swung as appropriate and / or the bend 2d is swiveled as appropriate to direct the female coupler 2f of the bend 2d of the second portion 2 to the female coupler 1d of the first portion.
After the pipe member 3 is appropriately bent and plastically deformed, the male coupler 3a is connected to the female coupler 1d of the first portion 1 with one touch, and then the pipe member 3 is elastically deformed while the male coupler 3b of the pipe member 3 is deformed. The shaft core is aligned with the shaft core of the female coupler 2f of the bend 2d of the second portion 2, and the male coupler 3b is connected to the female coupler 2f with one touch while releasing the elastic deformation of the tube member 3.

As can be seen from the above description, the water meter installation unit A is separated into the first part 1, the second part 2, and the pipe member 3, which is a connecting part between them, and the first part 1 is arranged on the entire floor of the multi-layer apartment house. If it connects with the branch pipe C2 of the water supply standpipe C and the water stop valve 1a of the 1st part 1 is closed, before the installation of the water meter installation unit A to the whole floor is completed, the pressure test of the water supply standpipe C will be performed. It can be carried out. Thereby, the construction period extension of waterworks can be avoided.
The first part 1 is connected to the branch pipe C2 of the water supply standpipe C, the second part 2 is installed on the pipe shaft inner floor E near the water supply standpipe, and then both are connected by the pipe member 3. Since 3 is flexible, if the length of the pipe member 3 is allowed to be wide, the pipe member 3 is connected to the branch pipe C2 of the water supply vertical pipe C and the bend 2d which is the upstream connection port of the second portion 2. According to the relative positional relationship, it can be appropriately bent, and the axial center at the downstream end of the tube member 3 can be aligned with the axial center at the upstream end of the second portion 2 to connect them. As a result, it is possible to make only the elbow D bent in the vertical plane between the branch pipe of the water supply standpipe and the pipe member connected to the branch pipe. Can be avoided.
Since the pipe member 3 is connected to the first part 1 and the second part 2 via a one-touch watertight joint, the pipe member 3 is separated from the first part 1 and the second part 2 and again the first part 1. When connecting to the second portion 2, it is not necessary to cut or process the pipe member 3. As a result, variations in construction quality can be avoided, and occurrence of problems such as water leakage can be avoided.
Even if there is some variation in the relative positional relationship between the branch pipe C2 of the water supply standpipe C and the installation position of the second portion 2 of the water meter installation unit A for each floor, the elbow 2c is appropriately swung. The first part 1 and the second part 2 can be reliably connected by the pipe member 3 by appropriately swinging the bend 2d.
In the pressure resistance test method for the water supply standpipe C, the pressure test of the water supply standpipe C can be performed before the installation of the water meter installation unit A on all floors of the apartment is completed. As a result, it is possible to avoid lengthening the construction period of waterworks when constructing a housing complex.

The pressure reducing valve 1b may be removed from the first portion 1.
As shown in FIG. 2, an elbow 2d ′ capable of swinging rotation may be provided instead of the bend 2d capable of swinging rotation. The degree of freedom of the position of the connection part between the second part 2 and the pipe member 3 is increased.
The bend 2d may be removed from the second portion 2. In this case, the upstream end of the elbow 2c needs to be provided with a female coupler. The elbow 2c may not be rotatable. In this case, the upstream end of the elbow 2c needs to be directed upward.
A bend capable of swinging around the vertical axis is disposed at the downstream end of the first portion 1, or a combination of an elbow capable of swinging and a bend capable of swinging is disposed, or can be swung. A combination of an elbow and an elbow capable of swinging may be provided. In this case, the downstream end of the most downstream bend or elbow needs to be provided with a female coupler.
The pipe member 3 is not limited to an aluminum three-layer pipe. Any material having flexibility may be used. Accordingly, a resin pipe may be used. The aluminum three-layer tube has an advantage that it can be plastically deformed to maintain the deformed shape.
As a fixing means of the one-touch watertight joint, any conventionally used means such as a U pin and a fastener may be used.
Instead of the one-touch watertight joint, a cap nut type watertight joint may be used.
As shown in FIG. 3 (a), the female coupler 2f, and tubular 2f ₁ among which is fixed in the longitudinal direction, an outer cylinder 2f ₂ to relatively move longitudinally with respect to the inner cylinder 2f _1, the outer cylinder 2f ₂ May be a slide-type coupler having a screw 2f ₃ for fixing to the inner cylinder 2f ₁ , and a connecting portion between the tube member 3 and the second portion 2 may be a slide joint.
Even when the connecting portion between the pipe member 3 and the second portion 2 is a cap nut type watertight joint, as shown in FIG. 3B, the female coupler 2f ′ of the cap nut type watertight joint is fixed in the longitudinal direction. An inner cylinder 2f ₁ ′, an outer cylinder 2f ₂ ′ that moves relative to the inner cylinder 2f ₁ ′ in the longitudinal direction, and a screw 2f ₃ ′ that fixes the outer cylinder 2f ₂ ′ to the inner cylinder 2f ₁ ′. The connecting portion between the pipe member 3 and the second portion 2 may be a slide joint.
A connecting portion between the pipe member 3 and the first portion 1 may be a slide joint.
The slide joint may include an outer cylinder fixed in the longitudinal direction, an inner cylinder that moves relative to the outer cylinder in the longitudinal direction, and a screw that fixes the inner cylinder to the outer cylinder.
Even if there is some variation in the relative positional relationship between the branch pipe C2 of the water supply standpipe C and the installation position of the second part 2 of the water meter installation unit A, the first part 1 can be obtained by using a slide joint. And the second portion 2 can be reliably connected by the pipe member 3.
The female couplers C3, 1c, 1d, and 2f may be male couplers, and the male couplers D1, 3a, and 3b may be female couplers.

INDUSTRIAL APPLICABILITY The present invention can be widely used in a pressure test method for water supply vertical pipes of apartment houses .

A Water meter installation unit 1 1st part 1a Water stop valve 1b Pressure reducing valve 1c, 1d Female coupler 2 2nd part 2a Water meter support member 2b Check valve 2c Elbow 2d Bend 2d 'Elbow 2e Connection part 2f, 2f' Female coupler 3 Pipe member 3a, 3b Male coupler B Pipe shaft C Water supply vertical pipe C1 Short pipe C2 Branch pipe C3 Female coupler D Elbow D1 Male coupler

Claims (5)

A first part having a water stop valve or a water stop valve and a pressure reducing valve; a second part having a water meter support member and a check valve; and a flexible pipe member, one end of the pipe member being The first part of the water meter installation unit is characterized in that the other end is connected to the first part via a one-touch watertight joint or a cap nut type watertight joint having a detachable female coupler and a male coupler . A pressure resistance test method for a water supply stand pipe of an apartment house, wherein one part is connected to the water supply stand pipe of the apartment house, the water stop valve of the first part is closed, and the internal space of the water supply stand pipe is pressurized. The pressure resistance test method for a water supply standpipe of an apartment house according to claim 1, wherein the connection part between the pipe member and the first part and / or the connection part between the second part has a slide joint. The pressure resistance of the water supply standpipe for an apartment house according to claim 1 or 2, wherein the connection part between the pipe member and the first part and / or the connection part with the second part has a bend capable of swinging rotation. Test method. The connection part of a pipe member and a 1st part and / or the connection part of a 2nd part have an elbow which can be swung, The apartment house of any one of Claim 1 thru | or 3 characterized by the above-mentioned . Pressure resistance test method for water supply vertical pipes. Set of one end according to any one of claims 1 to 4, characterized in that the first portion via one of the elbow which is directed downward is connected to the water supply standing pipe in apartment house pipe shaft Pressure test method for residential water supply pipes.

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