JPS64588Y2 - - Google Patents

Description

[Detailed description of the invention] In addition to residential buildings, large high-rise structures such as buildings, water pipes and heating systems are installed in a wide variety of locations, such as under floors and inside walls, for example. It is customary for fluid piping, such as hot water piping for hot water supply, to be inspected for leaks due to poor connections, etc., once they have been installed and constructed roughly in accordance with the system diagram. The object of the present invention is to provide a leak test plug for fluid piping that is always easy to handle when performing the above leak test, can significantly improve overall work efficiency, and is inexpensive.

To be more specific, when testing fluid piping for leaks as described above, even if the pipes flow the same type of fluid, for example, those on the upper floor and those on the lower floor,
Alternatively, there are pipes that are constructed separately from each other, such as those of adjacent units in an apartment complex, and it is desirable from the viewpoint of work efficiency to connect these pipes and different fluid distribution pipes together. Furthermore, when looking at the fluid piping for each unit, there are many and multiple types of joints installed, and the function is to ensure that all the open ends of these joints are sealed during a leak test. It is necessary to use a plug with

In order to satisfy such requests and requirements, conventionally, multiple types of plugs corresponding to each type of joint are connected to the open end of each joint, or,
In addition to using pitch fittings for copper pipes, a bridge connection member of a completely different form than the above-mentioned plug was used to connect the pipes together, but in this case, the type of member used to connect to the open end of the pipes was Because of the large number of parts, it is easy to get confused during the actual construction on-site, and in the case of Pitsuro attachment, there are even more work steps, which requires a great deal of effort and is one of the causes of lowering the overall work efficiency. Ta.

The plug for testing leakage in fluid piping according to the present invention has been developed in view of the above-mentioned circumstances. A male threaded portion that can be threadedly connected to the female threaded portion of the plug is provided, and a female threaded portion that is formed on a blind cap separate from the plug body and a fluid piping separated from each other is provided on the other end side in the streamline direction. A male threaded portion is provided at the end of the crossover hose for communicating and connecting both fluid piping between a plurality of plug bodies threadedly connected to the female threaded portion of the threaded joint. characterized by things.

In other words, the plug of the present invention has a plug body that can be easily and securely screwed into threaded joints, which are the most commonly used joints in the fluid piping to be tested. In addition to being constructed in a form that can be connected, as mentioned above, a crossover hose for connecting fluid pipes separated from each other and a cap for closing during a leak test can be selectively and easily screwed together. It is possible to minimize the number of parts used to carry out the desired test by configuring the structure to be as simple as possible, and by using screw connections, it is also possible to eliminate the use of tools, etc., reducing the work effort. This made it possible to minimize the amount of damage, making testing easier.Also, after the test, it can be used as is to protect the open end when embedding the pipe in the wall, so special This eliminates the need to use heavy frames, and also eliminates confusion in selecting the parts to be used during on-site construction. Overall, handling of parts is extremely simple, and work efficiency is significantly improved compared to the conventional method.

The mode of implementation of the present invention will be described in detail below based on illustrative drawings. Fig. 1 is an example of a fluid piping system for two adjacent dwelling units in an apartment complex, etc., in which P ₁ and P ₁ ' are a number of elbows, and T-type threaded joint J ₁ ,
This is a water pipe constructed in an appropriately branched form using J ₁ ′, and P ₂ , P ₂ ′ are the same threaded joints J ₂ ,
A hot water pipe for heating using J ₂ ′ and arranged in an appropriately branched form to have open ends X ₂ , X ₂ ′ for mechanical connections other than welding or screws,
Of these two pipes P ₁ , P ₁ ′, P ₂ , P ₂ ′, the pipes P ₁ , P ₂ and P ₁ ′, P ₂ ′ for each dwelling unit are connected to flexible crossover hoses 5 and 5, respectively. The openings of threaded joints J ₁ , J ₁ ′, J _{2 ,} J _{2 ′} for communication and connection via Threaded fittings for connecting through
J ₁ , J ₁ ′ openings, and each pipe P ₁ , P ₁ ′, P ₂ ,
Plug A is connected to the remaining threaded joints J ₁ , J ₁ ′, J ₂ , J ₂ ′ openings at P _{2 ′} , and the opening ends X ₂ ,
_{With another plug} B _{connected to} (water), all piping P ₁ , P ₁ ′,
At the same time as air barging P ₂ and P ₂ ′,
The pressure inside the piping after the air barge is maintained at a pressure higher than the maximum pressure during actual fluid flow use for an appropriate period of time, and the pressure change is read with the meter M while the pressure is maintained. P ₁ , P ₁ ′,
P ₂ and P ₂ ′ are inspected for leakage, and the air barge and the plug A used to connect to the threaded joints J ₁ , J ₁ ′, J ₂ , and J ₂ ′ during leakage inspection are Configure as follows.

That is, as shown in FIGS. 2 and 3, it has a flow path 1 passing through it in the axial direction, and the outer periphery of one end is designed so that sufficient tightening torque can be obtained even with fingers. The plug body 2 is integrally molded from a hard synthetic resin such as hard vinyl chloride or hard polyethylene, and has a hexagonal head 9 that is knurled to prevent hand slippage. At one end in the linear direction, a male threaded portion 3 is protruded and connected to the female threaded portion formed on the inner peripheral surface of the threaded joints J ₁ , J ₁ ′, J ₂ , and J _{2 ′} in the fluid piping. In addition, on the other end side in the streamline direction of the through flow path 1, there is a female threaded portion 4a formed in a blind cap 4 made of hard synthetic resin, which is separate from the plug body 2 and has a knurled outer peripheral surface. and a female screw portion 5 formed in the wing nut-shaped metal fittings 5b, which are rotatably supported externally on both ends of the aforementioned crossover hose 5;
It has a protruding male threaded part 6 that can be screwed into the threaded joints of each piping P ₁ , P ₁ ′, P ₂ , P ₂ ′ during the air barge and leakage test described above. Air barge is performed by supplying water to J ₁ , J ₁ ′, J ₂ , and J ₂ ′ with the plug bodies 2 manually screwed together via the male threads 3, and Of these, the above-mentioned crossover hoses 5 are connected to appropriate ones, and the caps 4 are connected to the remaining ones to perform a leakage test. Incidentally, sealing rubber gaskets 8 and 9 are fitted and held at the root ends of the male threaded portions 3 and 6 at both ends of the plug body 2, respectively. In addition, as the separate plug B, generally the fourth
As shown in the figure, a rubber seal member 11 expands and deforms in the radial direction as the screw nut 10 is tightened while being inserted into the tube end openings X _{2 and} A cylindrical member 13 with an axial through hole 13a and a ring-shaped member 12 that acts to prevent removal against test pressure by biting into it in an inclined position against A detachable blind cap 14 is used.

In addition, if the entire plug is integrally molded from hard synthetic resin, it can be manufactured easily and inexpensively, and
It is also advantageous in terms of durability as it does not oxidize or corrode.

[Brief explanation of drawings]

The drawings illustrate an embodiment of the plug for leak testing of fluid piping according to the present invention, and FIG. 1 is a schematic piping system diagram showing the test situation, FIG. 2 is an enlarged partially cutaway perspective view of the main part, and FIG. FIG. 3 is an enlarged vertical cross-sectional view of the main part, and FIG. 4 is an enlarged vertical cross-sectional view of another plug used in conjunction with the test. 1... Through flow path, 2... Plug body, 3, 6...
... Male thread part, 4 ... Blind cap, 5 ... Crossing hose.

Claims (1)

[Claims for Utility Model Registration] A plug body 2 having a through-flow path 1 is capable of being screwed onto one end side in the streamline direction of the through-flow path 1 to a female thread formed in a threaded joint in a fluid piping. A male threaded portion 3 is provided, and the female threaded portion 4a is formed on a blind cap 4 separate from the plug body 2 on the other end side in the streamline direction, and is screwed into a female threaded portion of a threaded joint of a fluid piping separated from each other. A crossover hose 5 for communicating and connecting both fluid pipes between the plurality of connected plug bodies 2, 2.
A plug for leakage testing of fluid piping, characterized in that a male threaded part 6 is provided at the end to which a female threaded part 5a can be screwed. The plug body 2 has the male threaded portions 3 at both ends,
6. The plug for leakage testing of fluid piping as set forth in claim 6, which is integrally molded from a hard synthetic resin.