JPH07174268A - Insulating sliding support for sheath pipe-inside piping - Google Patents

Abstract

PURPOSE:To make a fastening bolt unnecessary by supporting a pipe which protects a pipeline in a road bridge and the like by forming in sheath pipe structure with a support made of ultrahigh molecular weight polyethylene, and fixing the support to the outside of a sheath pipe-inside piping with epoxy resin base mortar. CONSTITUTION:When a pipeline is installed in a road bridge and the like, in order to prevent leakage diffusion, the pipeline (piping 1) is installed as a sheath pipe-inside piping to protect the piping 1. For supporting the piping 1 on the inside of a sheath pipe 5 with a support 2, the support 2 is formed as an insulating sliding support with ultrahigh molecular weight polyethylene, and fixed to the outside of the piping 1 with epoxy resin base mortar 3. When the sliding support 2 is fixed to the piping 1, the support 2 is built in the piping 1 together with a circular steel mold frame 4 set to the support 2, and the mortar 3 is filled from a filling hole 2a formed in the support 2. After solidifying the mortar 3, the mold frame 4 is removed to finish installation.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention has a sheath pipe structure for the purpose of preventing leakage diffusion when a pipeline is installed on a road bridge or increasing cross-sectional rigidity when a pipe beam crosses a river. In case of support for supporting pipe.

[0002]

[Prior Art] When installing a pipeline on a road bridge,
In some cases, piping inside the sheath pipe may be performed as one of the measures to prevent the diffusion of leakage. In this case, the pipeline exhibits expansion and contraction behavior mainly in the bridge axis direction due to temperature changes and the effects of earthquakes,
Since the behaviors of the sheath pipe and the pipe do not always match, it is necessary for the pipe in the sheath pipe to have a sliding support that enables smooth movement. In addition, as a corrosion protection measure for the pipe, insulation is required so that the inside of the sheath pipe and the pipe itself do not touch metal.

Generally, the pipe 11 installed in the sheath pipe 15.
2, the plastic material 12 as a support divided in the circumferential direction is fixed to the pipe 11 with a tightening bolt 13 so that the pipe 11 and the support 12 do not slip when sliding. The rubber sheet 14 and the like are wound to increase the restraining force.

[0004]

The above-mentioned conventional support for winding and fixing it around the pipe has the following problems because the bolt is used for fixing to the pipe. 1) Since the support body is made of plastic, the self-confidence of the plastic causes creep deformation (permanent elongation) with respect to the long-term load of bolt tightening, and the tightening load decreases and the entire support loosens and shifts.

2) The tightening force due to the bolt tightening concentrates on the bolt portion, does not work uniformly over the entire peripheral surface of the pipe, and the restraining force on the pipe body is weak. 3) Torque control is required when tightening the bolts in order to obtain a predetermined tightening force so that the pipe and the support do not shift when sliding. .

4) When the support and the pipe are misaligned or when the bolt is dropped, the pipe may be damaged because the metal is used. The present invention has been made to solve the above-mentioned problems, and it is possible to set a support on a pipe without using a bolt, and more closely adhere to the pipe than a conventional support. A force (restraint force) is obtained, and the purpose is to fix and hold the pipe in the future without causing looseness or displacement of the support itself.

[0007]

The insulating sliding support for the pipe in the sheath pipe of the present invention comprises a support made of ultra-high molecular weight polyethylene fixed to the outside of the pipe in the sheath pipe by an epoxy resin mortar. . The surface of the mortar-filled portion on the outer periphery of the pipe in the sheath tube is roughened or a circumferential groove is formed.

[0008]

Since the support is fixed to the pipe by the epoxy resin mortar and the tightening bolt is not used as in the conventional case, the above-mentioned problems caused by using the tightening bolt can be avoided.

Further, by subjecting the resin-based mortar filled portion on the outer periphery of the pipe to surface roughening treatment or forming a groove in the circumferential direction, high adhesion and shearing force can be obtained after the mortar is hardened, and the pipe of the support can be provided. The binding force of can be increased and the durability can be improved.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is an overall configuration diagram showing an embodiment of the present invention. An insulating sliding support 2 made of ultra-high molecular weight polyethylene is fixed to the outside of the pipe 1 in the sheath pipe 5 by an epoxy resin mortar 3.

Next, the procedure for attaching the sliding support 2 to the pipe 1 installed in the sheath pipe 5 will be described. In this case, the sliding support 2 is attached to the pipe 1 before inserting the pipe 1 into the sheath pipe 5.

For example, in order to improve the adhesiveness of the resin mortar and prevent the deviation, the groove 1a is processed and the surface is roughened on the entire circumference of the mounting position of the sliding support 2 of the coated pipe 1.

A circular steel form 4 having the annular slide support 2 set thereon is attached to the place where the above-described groove processing and surface roughening have been performed. In this case, the annular sliding support 2
Is formed by connecting a plurality of support members divided in the circumferential direction in a ring shape. A dovetail groove 2c is formed on the inner surface of the sliding support 2 to prevent the shift. Further, the sliding support 2 is provided with a filling hole 2a for the resin-based mortar 3 and an air vent hole 2b.
Then, the resin mortar 3 is filled from the filling hole 2a, and after the resin mortar 3 is hardened, the steel form 4 is removed and the installation is completed.

[0014]

As described above, according to the present invention, since the epoxy resin-based mortar is used to fix the ultra-high molecular weight polyethylene sliding material to the pipe, it is possible to provide an insulating support without using any metal, There is an effect that it is possible to obtain a pipe support device that has a high restraining force on the pipe and is excellent in durability.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the overall configuration of an embodiment of the present invention.

FIG. 2 is an explanatory view of a conventional support for piping in a sheath pipe.

[Explanation of symbols]

1 ... Piping, 1a ... Circumferential groove, 2 ... Support, 3 ... Epoxy resin mortar, 5 ... Sheath pipe.

Claims (2)

[Claims] 1. An insulating sliding support for a pipe in a sheath pipe, wherein a support made of ultra high molecular weight polyethylene is fixed to the outside of the pipe in the sheath pipe with an epoxy resin mortar. 2. The insulating sliding support for the in-sheath pipe according to claim 1, wherein the mortar-filled portion on the outer periphery of the in-sheath pipe is surface-roughened or has a circumferential groove.