JPH0237038Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention relates to a clamp cover for covering a branch part of a gas pipe or the like buried underground that may become wet, together with a clamp attached to the branch part for the purpose of reinforcement.

Under the current situation, city gas and other pipes buried underground are constantly exposed to electrolytic corrosion caused by moisture in the ground, so straight pipe sections are made of polyethylene-lined steel pipes with a polyethylene outer lining. Therefore, there is no problem with this part, but
There is a problem in terms of electrolytic corrosion with respect to the branch portions of gas piping, etc., which are incidental to such piping and are numerous. In other words, if such a branch part is left as it is, there will be exposed metal parts, and this part will be a major factor in forming an electrical circuit along the gas pipe, and in severe cases, a through hole will be drilled in the gas pipe. Electrolytic corrosion occurs. Moreover, since such branch parts are subject to force due to earthquakes and other vibrations, in reality, clamps made of cast metal or the like are usually attached to these parts as reinforcing members through bolts and nuts, which complicates the structure. . A diagram showing this situation is shown in FIG. 1, where 1 is a clamp and 2 is a gas pipe, and since the branching portion is complicated in this way, it is not easy to take measures to prevent electrolytic corrosion.

The present invention provides a clamp cover that completely electrically insulates the exposed branch part of the complicated metal part to which the clamp is attached with a small number of man-hours, as shown in Fig. 2. ~
Explaining according to FIG. 4, the clamp cover of the present invention has a laminate layer consisting of a room-temperature plastic layer 3, a foamed plastic layer 4, and a soft plastic layer 5, with the room-temperature plastic layer 3 as an inner layer, and a soft plastic layer. The plastic layer 5 is used as an outer layer to form a cover body 9 consisting of a right side body 7 and a left side body 8 which are integrated through a hinge portion 6.

The thickness of the room temperature plastic layer 3 is 10 to 30% of the total thickness.
The preferable material for this layer is a synthetic resin that is water resistant at room temperature and exhibits clay-like plasticity.For example, the main material is mastic, which is plastic at room temperature, and other materials such as fillers, softening agents, and aging materials. Use a material containing preventive material, carbon black, etc. The room-temperature plastic layer 3 is preferably provided with a setback portion 13 at the edge. The thickness of the foamed plastic layer 4 is about 50-70%, preferably about 66% of the total thickness, and the preferred material used for this layer is, for example, polyethylene foam. The thickness of the soft plastic layer 5 is around 5-15% of the total thickness, preferably about 12%, and the preferred material for this layer is polyethylene sheet.

The clamp cover of the present invention will finally be able to, for example,
For example, it is preferable to provide, for example, a raised portion 10 in advance so that as little as possible remains in the branch portion formed as shown in FIG. 3 and as shown in FIG. During shipping, the right side body 7 and the left side body 8 are transported in a closed state with a release paper placed between them.

The clamp cover 9 of the present invention, as illustrated in FIG.
Fold the hinge part 6 together with the figure) to make the right body 7 and left body 8
Clamp 1 by pressing firmly from the outside of the right body 7 and left body 8 with your hands or a protruding object.
The gas pipe 2 and the clamp cover 9 should be installed so that as little space as possible is left between them, and at this time, it is important to press the joint between the right side body 7 and the left side body 8 particularly carefully.

As described above, the room temperature plastic body 3 deforms plastically to adapt to the shape of the clamp, etc., and comes into close contact with the branch section including the clamp 1, and the right body 7
The joints of the left side body 8 are also tightly bonded, and no moisture or moisture can enter, and the electrolytic corrosion prevention treatment is completed. More preferably, the reliability can be improved by using the wire bundle band 11 through the through hole 12 as shown in FIGS. 3 and 4.

In the clamp cover of the present invention, the room-temperature plastic layer 3 has adhesiveness and plastic deformation, and
The foamed plastic layer 4 adjacent to this layer 3 also has flexibility or flexibility that allows it to be appropriately deformed, and also has resilience, and the outermost soft plastic layer 5 is protected against physical damage from the outside. It has the robustness to protect from force.

Since the present invention is constructed as described above, it is possible to completely protect the branch parts of gas pipes, water pipes, etc. buried underground from electrolytic corrosion by significantly reducing labor and man-hours. This has the remarkable effect of significantly extending the life of the gas pipe.

[Brief explanation of the drawing]

Fig. 1 is a perspective view showing a gas pipe branch with a clamp attached, Fig. 2 is a cross-sectional view of the material of the clamp cover as an example of the present invention, and Fig. 3 is a perspective view of an example of the clamp cover of the present invention. FIG. 4 is a perspective view showing an example of an assembled state of the clamp cover of the present invention. In the diagram, 1... Clamp, 2... Gas pipe, 3...
Room temperature plastic layer, 4... Foamed plastic layer, 5...
...Soft plastic, 7...Right side body, 8...Left side body.

Claims (1)

[Scope of utility model registration request] In a cover that waterproofly covers a branch part of a gas pipe or the like buried underground, together with a clamp attached to the branch part, a laminate consisting of a room temperature plastic layer, a foamed plastic layer, and a soft plastic layer is used. What is claimed is: 1. A clamp cover, characterized in that it is formed into a cover body consisting of a right side body and a left side body, which are made of a soft plastic layer as an inner layer and a soft plastic layer as an outer layer and are integrated through a hinge part.