JPH0135996Y2 - - Google Patents

Description

[Detailed description of the invention] [Field of industrial application] The invention is applicable to piping equipment for gas, water, etc.
This relates to a piping device with a rust-proof structure that prevents the inside of a pipe or joint from rusting or corroding due to water.

[Conventional technology]

Conventional piping for gas, water, etc. uses iron pipes, and these iron pipes are also connected using iron joints.

Since the inside of this iron pipe and the inside of the iron joint are constantly in contact with water, over a long period of time, rust (red rust) will develop inside, making it unhygienic, and if the rust progresses and corrodes, it can cause gas and water leaks. Summer. (Rust and corrosion are particularly strong in the joint part.) [Problems that the invention aims to solve] This invention solves these drawbacks, and eliminates rust and corrosion inside the pipe and joint. A technical challenge is to provide a piping device that can be used safely for a long period of time.

[Means for solving problems]

Plastic pipes 3, 4 are inserted into iron pipes 1, 2 to form double pipes a, b, and double pipes a,
The plastic pipes 3 and 4 on the joining side of b protrude from the end faces of the iron pipes 1 and 2, and these pipe protrusions 3a and 4a
Butt the tubes together and attach 2 to the outer periphery of the tube protrusions 3a and 4a.
The plastic pipe 5 of the heavy pipe joint c is fitted, and the outer periphery of the plastic pipe 5 and the iron pipes 1 and 2 are connected.
The iron pipe 6 of the double pipe joint c is fitted on the outer periphery of the joint side end of the iron pipe 6, and both ends of the iron pipe 6 are connected to the iron pipe 1,
The double pipe joint c connects the double pipes a and b.

[Effect]

Pipe protrusion 3 of double pipes a and b to be joined
A plastic pipe 5 with a double pipe joint c is fitted on the outer periphery of the pipe protrusions 3a and 4a, and a double pipe joint c is fitted on the outer periphery of the pipe protrusions 3a and 4a and the plastic pipes 3 and 4.
, and both ends of the iron pipe 6 are fixed to the ends of the plastic pipes 3 and 4, and the double pipes a and b are connected via a double pipe joint c.

〔Example〕

The plastic pipes 3 and 4 of these double pipes a and b are preferably hard vinyl chloride pipes, and may be inserted into the steel pipes 1 and 2 in advance, or they may be inserted into the steel pipes 1 and 2 at the piping site. It's okay.

The plastic pipe 5 of the double pipe joint c is also preferably made of hard vinyl chloride.
The tube protrusions 3a, 4a of the plastic tubes 3, 4
It is best to fit the outer periphery with a resin adhesive.

This iron tube 6 may be glued, but it is preferable to form screws at both ends and screw it to the ends of the iron tubes 1 and 2 using an adhesive.

[Effect of idea]

Since the present invention is configured as described above, it has the following features.

1 The inside of the pipe and the joint are covered with plastic pipe, that is, they are coated with a plastic layer, so there is no cause for rust, so even if used for a long time. This will result in piping that does not rust or corrode, providing gas, water, etc. piping that can be used with peace of mind.

2 On the other hand, even if corrosion starts from the outside, plastic pipes are safe because they will not rust or corrode.

3. Since the double pipes a and b and the double pipe joint c have a double structure, they are stronger than the conventional single-ply structure, and also have a heat-insulating structure, which prevents freezing.

4 Furthermore, during construction, the plastic pipes are simply inserted and fitted into the existing iron pipes, so it is not that troublesome, does not impede construction efficiency, and is cheaper than using plastic pipes. It's not that expensive because you just have to do it.

[Brief explanation of the drawing]

FIG. 1 is an exploded perspective view of the device, FIG. 2 is a front sectional view of the device, and FIG. 3 is a side sectional view taken along line A-A. a, b...double pipe, c...double pipe joint,
1, 2...Iron pipe, 3, 4...Plastic pipe, 3a, 4a...Pipe protrusion, 5...Plastic pipe, 6...Iron pipe.

Claims (1)

[Scope of utility model registration request] A plastic pipe is inserted into a steel pipe to form a double pipe, and the plastic pipe on the joining side of the double pipe protrudes from the end face of the iron pipe, the protruding parts of the pipe are butted, and a double pipe is formed on the outer periphery of the protruding part of the pipe. A plastic pipe of a pipe joint is fitted, a steel pipe of a double pipe joint is fitted on the outer periphery of the plastic pipe and the outer periphery of the joining side end of the iron pipe, and both ends of the iron pipe are fitted with a joint of the iron pipe. A piping device characterized by being fixed to the outer periphery of the mating side end and connecting double pipes through the double pipe joint.