JP3099815U - Jig for leak test of drain pipe - Google Patents

Abstract

An object of the present invention is to provide a drain pipe leakage test jig excellent in workability, which can perform work only on a floor to be tested.
A hollow cylindrical main body (2), which is fitted to a vertical pipe receiving port (21a) of a collecting pipe, has a lower part opened and an upper part closed by a closing part (3), and is formed on the outer periphery of the closing part (3), A flange portion 4 engaging with the upper end of the pipe receiving port 21a, a joint tube 8 having a valve 7 mounted on the closing portion 3 for supplying pressurized air into the main body 2, and a fitting portion 8 mounted on the closing portion 3 , And a pressure gauge 9 for measuring the pressure inside the main body 2.
[Selection] Figure 2

Description

The present invention relates to a jig for a leak test of a drain pipe, and more specifically, is used during a construction of a multi-story building and used for a leak test for inspecting a drain pipe for leaks on each floor. About jig to do.

満 As a method for inspecting the leakage of drainage pipes in a multi-story building, a fullness test has been generally performed. In this water filling test, a part of the vertical pipe is sealed with a water filling joint, a closing plug is attached to the branch pipe branched from the collecting pipe on the floor to be tested, and the pipe is sealed, and water is injected from the upper part of the vertical pipe. This is a method to check for water leakage.

満 However, in this water filling test, it is necessary to install a water filling joint that is used only for the test on each floor, which is a factor of increasing construction costs. Further, it takes a lot of time and effort to make the water full. For this reason, a method has been proposed in which pressurized air is injected into a pipe in a closed section instead of a water-full test, and the presence or absence of leakage is inspected based on a change in the pressure (see Patent Document 1). However, since this conventional method employs a method of sealing a part (two places in total) of the vertical pipes on the upper and lower floors connected via the collecting pipe, there are the following problems.

That is, in the method disclosed in Patent Literature 1, two obturators for sealing the vertical pipe are connected by a string, and these two obturators are suspended from the upper floor of the floor to be tested into the vertical pipe. . Each of these two closures expands by supplying a pressurized fluid to seal the vertical pipe, and the fluid source is also installed on the upper floor. For this reason, work must be performed while coordinating between the floor to be tested and the upper floor, and workability is extremely poor.
JP-A-2-221733

This invention has been made based on the technical background as described above, and achieves the following objects.
An object of the present invention is to provide a drain pipe leak test jig excellent in workability, which can perform work only on a floor to be tested.

This invention employs the following means to achieve the above object.
That is, the present invention is a jig for leak test of a drain pipe having a pipe structure in which vertical pipes on upper and lower floors are connected by collecting pipes installed on each floor, and a branch pipe branches from the collecting pipe on each floor. hand,
A hollow cylindrical main body fitted to the vertical pipe receiving port of the collecting pipe, the lower part being open and the upper part being closed by a closing part,
A flange portion formed on the outer periphery of the closing portion and engaging with an upper end of the vertical pipe receiving port,
A fitting pipe having a valve, which is mounted on the closing part and supplies pressurized air to the inside of the main body,
And a pressure gauge for measuring a pressure inside the main body, the jig being provided in the closing portion, for leak test of a drain pipe.

More specifically, the main body and the closing portion are made of a transparent synthetic resin material so that the inside can be seen. Further, a hook for hooking a rope is provided on the lower surface of the closing portion. Here, the rope is a safety rope that suspends an inflatable plug for closing the inside of the vertical pipe below the collecting pipe.

が あ る There is a type in which packing is provided on the inner circumference of the receiving port of the collecting pipe in order to achieve close contact with the vertical pipe fitted into the receiving pipe. At the time of a leak test, the packing can be used to make the jig body and the collecting pipe adhere to each other. In the case of a collecting pipe without packing, packing is provided on the outer periphery of the jig body.

Since the jig according to this invention is used by being fitted to the inlet of the collecting pipe that connects the vertical pipes of the upper and lower floors to seal the inside of the pipe, work is performed only on the floor that is the target of the leak test. Therefore, the workability is improved, the construction time can be shortened, and the construction cost can be reduced. Further, since the jig is provided with a joint pipe and a pressure gauge for connecting to a supply source of the pressurized air, the supply of the pressurized air can be performed smoothly while checking the internal pressure.

FIG. 1 is a perspective view showing an embodiment of the present invention, and FIG. 2 is a vertical sectional view of the embodiment. The jig 1 has a hollow cylindrical main body 2. The main body 2 is open at the lower part and closed at the upper part by the closing part 3. A flange portion 4 is formed on the outer periphery of the closing portion 3. The main body 2 and the closing portion 3 constituting the jig 1 are made of a transparent synthetic resin, for example, a vinyl chloride resin so that the inside can be visually checked.

Two screw holes 5 and 6 are provided through the closing portion 3. A joint pipe 8 having a valve 7 and a pressure gauge 9 are provided on the upper surface side of the closing portion 3, and the joint pipe 8 is mounted in one screw hole 5. A mounting pipe 10 for a pressure gauge 9 is mounted in the other screw hole 6. Further, on the lower surface of the closing portion 3, an eggplant 11 is provided, which is a hook for hooking safety ropes described later.

Next, a leak test method using the jig 1 will be described. FIG. 3 is a schematic explanatory view showing an example of the leak test method. As shown in FIG. 3, in a multi-story building, collecting pipes 21 are installed through floor slabs 20 of each floor, and vertical pipes of the upper and lower floors (the vertical pipes of lower floors are denoted by reference numerals through the collecting pipes 21). 22) is connected. Further, a branch pipe 23 branches from the collecting pipe 21, and a plurality of horizontal branch pipes that lead to a toilet, a kitchen, a washroom, and the like (not shown) further branch from the branch pipe 23.

In performing the leak test, as shown in FIG. 3A, the inflatable plug 26 connected to the air hose 24 and the safety rope 25 is suspended from the vertical pipe receiving port 21a of the collecting pipe 21 into the vertical pipe on the lower floor. take down. Then, as shown in FIG. 3B, when the plug 26 reaches a predetermined position, an air pump 27 (a stepping type is shown in the drawing) is connected to the air hose 24 to inflate the plug 26. Then, it is closely attached and fixed to the pipe wall of the vertical pipe 22.

Next, as shown in FIG. 3 (c), the extra length of the air hose 24 and the safety rope 25 is stored in the vertical pipe, and the tip of the safety rope 25 is hooked on the eggplant 11 of the jig 1. Then, in this state, the main body 2 of the jig 1 is fitted to the vertical pipe port 21a of the collecting pipe. As shown in FIG. 2, a packing 30 is provided in the vertical pipe receiving port 21a of the collecting pipe shown in this embodiment in order to secure a sealing property with the vertical pipe on the upper floor. In the case of the jig 1 according to this embodiment, the packing 30 allows the jig 1 to be in close contact with the vertical pipe receiving port 21a.

(3) Next, as shown in FIG. 3D, the jig 1 is completely fixed to the collecting pipe 21 by the clamp device 31 so that the jig 1 does not come out of the collecting pipe 21 during the test. Although not shown, a plug for blocking is attached to each lateral branch pipe branched from the branch pipe 23.

When the section to be tested is sealed as described above, the hose 32 of the air pump 27 is connected to the joint pipe 8 as shown in FIG. Pressurized air is injected and pressurized until the pressure becomes constant (about 0.035 MPa in gauge pressure). Then, the valve 7 is closed and the pressurized state is maintained for a certain period of time. In order to identify the leak location, as described in Patent Document 1, a soap solution may be applied to the outer periphery of the pipe, or smoke or odor may be mixed with pressurized air.

The above embodiment is a jig that utilizes a collecting pipe 21 of a type in which the packing 30 is provided in the vertical pipe receiving port 21a. FIG. 4 shows another embodiment of the jig. This embodiment uses a collecting pipe 21 having no packing in the vertical pipe receiving port 21a. In this case, the outer periphery of the main body 2 of the jig 1 is used. Is provided with a packing 33. The collecting pipe of this type has a joining flange 35 formed by a bolt and a nut 34 at the tip of the receiving port 21a, and the jig 1 is fixed to the collecting pipe using this mechanism. For this reason, bolt holes 36 are provided in the flange portion 4 of the jig 1.

The above test method is merely an example, and other embodiments can be adopted. That is, in the above example, the jig is fitted to the collecting pipe of the floor to be tested, but the test may be performed by fitting the jig to the collecting pipe of a floor higher than the floor to be tested. It is possible.

It is a perspective view which shows embodiment of this invention. It is a vertical sectional view of the embodiment. It is a schematic explanatory view showing an example of a leak test method. It is a vertical sectional view showing another embodiment.

Explanation of reference numerals

DESCRIPTION OF SYMBOLS 1 Leak test jig 2 Main body 3 Closure part 4 Flange part 5, 6 Screw hole 7 Valve 8 Joint pipe 9 Pressure gauge 10 Mounting pipe 11 Naskan 20 Floor slab 21 Collecting pipe 21a Vertical pipe socket 23 Branch pipe 26 Inflatable plug 27 air pump 30 packing 31 clamp device

Claims (4)

A drain pipe leakage test jig having a pipe structure in which vertical pipes on the upper and lower floors are connected by collecting pipes installed on each floor, and a branch pipe branches from the collecting pipe on each floor,
A hollow cylindrical main body fitted to the vertical pipe receiving port of the collecting pipe, the lower part being open and the upper part being closed by a closing part,
A flange portion formed on the outer periphery of the closing portion and engaging with an upper end of the vertical pipe receiving port,
A fitting pipe having a valve, which is mounted on the closing part and supplies pressurized air to the inside of the main body,
A jig for a drainage pipe leak test, comprising: a pressure gauge mounted on the closing portion and measuring a pressure inside the main body. The jig according to claim 1, wherein the main body and the closing portion are made of a transparent synthetic resin material. The jig for a drainage pipe leakage test according to claim 1, wherein a hook for hooking a rope is provided on a lower surface of the closing portion. (4) The jig for leakage test of a drain pipe according to any one of claims 1, 2 and 3, wherein a packing is provided on an outer periphery of the main body.

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