JPS582577Y2 - Core for inner lining of irregularly shaped pipes - Google Patents

Description

[Detailed explanation of the idea] This invention relates to a core for lining the inner surface of a modified pipe.

In general, pipes used for slurry transportation are lined with a wear-resistant material or the like on the inner surface of the pipe in order to prevent wear due to the solids being transported and corrosion caused by the fluid. It is easily made by centrifugal molding.

However, in the case of irregularly shaped pipes such as curved pipes, T-shaped pipes, and single-sided pipes, centrifugal molding is not possible, so a core is placed inside the pipe and a lining material solution is injected and hardened into the gap between the inner surface of the pipe and the core. The inner surface of the tube is lined.

However, conventional cores are mold cores, and it is necessary to create a new core each time the coating thickness changes, making core production expensive.

Since the casing was made of metal, it was heavy, and the larger the diameter of the tube, the more difficult it was to handle.

This idea was devised to solve the above-mentioned drawbacks; the core material is made of plastic that has a low specific gravity and is easy to mold, and the lining thickness can be easily changed by attaching a tube to the core material. An object of the present invention is to provide a core for lining the inner surface of a deformed pipe that is light in weight, easy to handle, and inexpensive.

Hereinafter, this invention will be explained with reference to an embodiment shown in the drawings. This shows an example of a T-shaped pipe, and the core 1 is composed of a main pipe core 2 and a branch pipe core 3.

The core material of the core 1 is polyurethane foam 1a, which is easy to mold and has a low specific gravity, making it easy to handle.

The core core material is a plastic such as polyurethane foam 1a, which has small bubbles and can be molded with a relatively smooth core surface, has a relatively high heat resistance, and does not undergo heat deformation due to the lining solution described below. But it's okay.

A heat-shrinkable tube 1b made of plastic such as polyvinyl chloride resin and having a required thickness is wrapped around the outer peripheral surface of the core material, and is fixed to the core material by applying heat.

The heat-shrinkable tube 1b can be made into a core 1 by attaching multiple sheets to the core material or by changing the thickness of the heat-shrinkable tube 1b.
The outer diameter or lining thickness can be easily changed.

The T-shaped core 1 is made by drilling a hole 2a of a required depth into the main core 2 to fit the branch core 3 as shown in FIG. The end of the branch pipe core 3 is assembled into a T-shape by cutting it to match the side surface of the main pipe core 2.

In such a configuration, the main pipe core 2 and the branch pipe core 3 are respectively fitted into the T-shape 4 to assemble the core 1.

Next, plastic blind flanges 5, 5, 5 are respectively attached to the opening of the T-shape 4 to close the opening.

Further, in order to maintain a constant gap between the core 1 and the inner surface of the T-tube 4, the core 1 is attached to and supported by the blind flange 5 by appropriate means.

Next, the injection port 5a provided in the blind flange 5 on the branch pipe side
By injecting a solution of wear-resistant material 6 such as polyurethane into the tube and removing the hardened blind flanges 5, 5, 5i and core 1, the inner surface of T-tube 4 is coated with wear-resistant material 6.

Nafu...The above example shows the case of a T-shaped pipe, but the core 1 of this invention can also be applied to curved pipes and other irregularly shaped pipes.
not.

As mentioned above, according to this invention, the core material is made of lightweight plastic that is easy to shape the bottom, and the outer diameter of the core is made variable by covering it with a heat shrink tube, making it easy to handle and reducing the lining thickness. can be easily changed.

Moreover, the core manufacturing cost is also advantageous in that it is cheaper than the conventional method.

[Brief explanation of the drawing]

Figures 1 and 3 are cross-sectional views showing an example of how to assemble the T-tube core, Figures 2 and 4 are cross-sectional views of the respective assembled states, and Figure 5 is a perspective view of the core. FIG. 6 is a sectional view showing the state of use of the core. 1... Core, 1a... Polyurethane foam, 1b... Heat shrink tube, 2...
Main pipe core, 2a... Hole, 3... Branch pipe core, 4... T-shaped pipe, 5... Blind flange, 5a... ... Inlet, 6... Wear-resistant material.

Claims (1)

[Scope of utility model registration request] In a core used for the inner lining of a deformed pipe and arranged with a gap between the inner surface of the deformed pipe, the core core material is made of a plastic with a low specific gravity and a relatively high heat deformation temperature, such as polyurethane foam, A core for inner lining of a modified pipe, characterized in that an appropriate number of heat-shrinkable tubes of an appropriate thickness are attached to the outer surface of the core core material.