JPH0718512B2 - How to connect piping - Google Patents

Description

TECHNICAL FIELD The present invention relates to a method for connecting pipes in hygiene, air conditioning, plants, and the like.

[Conventional technology]

There are various joint structures for connecting pipes to each other or pipes to each other. For example, as shown in FIG. 7, an independent socket joint 1 is used to connect end portions of pipes 2 to each other. What is inserted and connected in the socket joint 1,
This is called a bell mouth connection. As shown in FIG. 8, the end of one pipe 2 is expanded to form a socket joint 1, and the end of the other pipe 2 is fitted into the joint 1. As shown in FIG. 9, a flange 3 is formed at the end of the pipe 2 to form a flange, and the flange joints 3 are joined together and fixed with bolts 4, as shown in FIG. For example, the meshing portion 5 is formed by a screw structure or the like and is joined by this.

Further, the fixing means at the joint portion includes not only the mechanical connection typified by the bolt 4, but also an adhesive, a heat fusion method, or the like.

[Problems to be Solved by the Invention]

However, when connecting such pipes, it has been difficult to confirm from the outside whether or not the pipes are placed at the correct positions and angles.

Conventionally, the method of putting a mark on the insertion length of the pipe before connection and placing it, etc. were taken, but this still assumes that the technical level of the worker and the work process are surely protected. Is. Further, during construction, it is difficult to confirm whether or not all the pipe connections have been securely made after the construction, and even after the construction, it becomes impossible to confirm if the pipe connection part enters the building body.

An object of the present invention is to eliminate the disadvantages of the conventional example described above, to provide a pipe connecting method that does not require large-scale application to the pipe, can always accurately attach the pipe with a simple structure, and can be implemented at low cost. Especially.

[Means for Solving the Problems]

In order to achieve the above-mentioned object, the present invention provides an electric terminal as a detection unit that conducts with a metal pipe inserted therein when the pipes are connected by a socket joint, and the electric terminal Detecting the pipe connection state by the output, or providing a magnetic sensor as a detection unit that operates in the magnetic pipe inserted here in the socket joint, and detecting the pipe connection state by the output of the magnetic sensor, or , When pipes are connected by a flange joint, the flange joint is provided with a detecting portion by a movable piece that operates by joining the joints and moves a blocking piece that appears in and out of the bolt through hole of the flange joint, and operates the detecting portion. The gist is to enable bolting of the flange joints together.

[Action]

According to the present invention as set forth in claim 1, since the pipe is a metal pipe,
When the tube is deeply inserted into the socket joint, the tube electrically connects the electrical terminals. As a result, it is possible to know that the pipe has been correctly inserted into the socket joint and to detect the connection between the pipes. In this way, unless the ends of each pipe are correctly inserted into the socket joint, the electrical contacts will not conduct, so that the pipes will be connected correctly and the pipes should always be installed correctly. You can

According to the present invention as set forth in claim 2, at least the end portion of the pipe is a magnetic pipe, and when the end of the pipe is inserted into the socket joint, the magnetic sensor detects this.

According to the present invention as set forth in claim 3, since the detection part by the movable piece does not operate unless the flange joints are joined accurately by the operation of the detection part, the blocking piece is provided in the bolt through hole of the flange joint. As it projects, it cannot be bolted. In this way, if the ends of the pipes do not match exactly, the joints through the bolts will not be possible, so that the pipes will be connected correctly and the pipes will always be installed correctly. .

〔Example〕

 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a vertical sectional side view showing a first embodiment of a pipe connecting method of the present invention, in which a pipe 2 is connected by a socket joint 1.

In this embodiment, a part of the inner side of the socket joint 1 is made of an insulator 7.
The electrical terminals 8 were embedded in the insulator 7 so as to be exposed inside the socket joint 1 at intervals.

Since the tube 2 is a metal tube, when the tube 2 is deeply inserted into the socket joint 1, the tube 2 electrically connects the electrical terminals 8 to each other. As a result, it is possible to know that the pipe 2 is correctly inserted into the socket joint 1 and to detect the connection between the pipes 2.

2 and 3 show a second embodiment and a third embodiment of the present invention, in which a magnetic sensor 11 such as a magnet switch is embedded in the socket joint 1. In the case of FIG. 2, the magnetic sensor 11 is longitudinally arranged in the inner flange 1a for stopping the pipe of the socket joint 1, and in the case of FIG. 3, along the pipe body of the socket joint 1 and of the pipe 2. It is located and placed in the final insert.

In this embodiment, at least the end portion of the pipe 2 is magnetic pipe, and when the end of the pipe 2 is inserted into the socket joint 1, the magnetic sensor 11 detects it.

4 to 6 show a fourth embodiment of the present invention in which the pipe 2 is a flange joint having a flange 3.

The flange 3 of one of the pipes 2 is provided with a movable piece 12 protruding and retracting toward the joint surface thereof with a spring 13 biased in the direction of protrusion, and a blocking piece protruding and retracting in the bolt through hole 3a of the flange 3 on the movable piece 12. 14 was rotatably connected.

In the state before joining, the movable piece 12 is pushed by the spring 13 and protrudes, and accordingly, the blocking piece 14 also protrudes into the bolt through hole 3a. Therefore, the bolt does not pass through the bolt through hole 3a.

When the flanges 3 are joined together by connecting the pipes 2 to each other, the movable piece 12 at the other flange 3 resists the spring 13 and the flange 3
It is pushed inside. As a result, the blocking piece 14 is also dragged,
Since the bolt 4 is retracted from the bolt through hole 3a, the bolt 4 can be inserted into the bolt through hole 3a.

〔The invention's effect〕

As described above, the pipe connecting method of the present invention can easily confirm whether the pipe is attached at an accurate position or angle during construction, so that the pipe can always be attached accurately. is there.

In addition, since the pipes can be surely connected at the same time when the construction is completed, it is possible to minimize the inspection after the construction.

Further, it does not require large-scale application to the pipe, has a simple structure, and can be implemented at low cost.

[Brief description of drawings]

FIG. 1 is a vertical sectional side view showing a first embodiment of a pipe connecting method of the invention, FIG. 2 is a vertical sectional side view showing the same second embodiment, and FIG. 3 is a vertical sectional side view showing the same third embodiment. FIG. 4 is a vertical side view showing the same as the fourth embodiment, FIG. 5 and FIG. 6 are vertical front views showing the operation of the fourth embodiment, and FIGS.
The figure is a vertical sectional side view showing an example of connection of piping. 1 ... Socket joint, 1a ... Partition inner flange 2 ... Pipe, 3 ... Flange 3a ... Bolt through hole, 4 ... Bolt 5 ... Mating part, 6 ... Electrical contact 7 ... Insulator , 8 ... Electrical terminal 9 ... Flexible part, 9a ... Swelling part 10 ... Transparent, 11 ... Magnetic sensor 12 ... Movable piece, 13 ... Spring 14 ... Blocking piece

 ─────────────────────────────────────────────────── --Continued from the front page (56) References JP-A-61-206183 (JP, A) JP-A-54-6119 (JP, A) JP-B-56-669 (JP, B2)

Claims (3)

[Claims] 1. When the pipes are connected by a socket joint, an electric terminal is provided in the socket joint as a detection unit that conducts with a metal pipe inserted therein, and a pipe connection state is provided by the output of the electric terminal. A method for connecting pipes, which is characterized by detecting 2. When the pipes are connected by a socket joint, a magnetic sensor as a detection unit that operates by a magnetic pipe inserted therein is provided in the socket joint, and the pipe connection state is detected by the output of the magnetic sensor. A method for connecting pipes, characterized in that 3. When the pipes are connected by a flange joint, the flange joint operates by joining the joints together,
A method for connecting pipes, wherein a detecting portion is provided by a movable piece that moves a blocking piece that appears in a bolt through hole of a flange joint, and the flange joints can be bolted together by the operation of the detecting portion.