JPH0996395A - Pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To carry out a repairing work while maintaining the airtightness and watertightness, and without cutting off the fluid, when a crazing or a crack is generated to the pipe main body, by providing a protective member made of an elastic material using a rubber, a synthetic resin, and the like, to the inner peripheral surface of a pipe main body under the close contact condition. SOLUTION: A protective member 2 made of an elastic material such as a rubber or synthetic resin is given an outer diameter same as or a little larger than the inner diameter of the pipe main body 1, and it is inserted in the pipe main body 1 by applying a tension in the axial direction to reduce the diameter, when it is set, and a close contact condition to the inner peripheral surface of the pipe main body 1 not to be adhered or not to be fixed is obtained. To a branch part, the protective member 2 at the connecting part is superposed by the protective member 2 longer than the branch part duct, and a pressure connection or a thermal fusion is applied to joint them. When a crazing or a crack is generated to the pipe main body 1 by the operation of an external force, the protective member 2 never receives the influence of the damage of the pipe main body 1, because it is in a close contact condition not adhered or fixed, and the airtightness and the watertightness can be maintained, and the repairing work can be carried out without cutting of the fluid feeding.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pipe used for piping a fluid such as gas or water whose inner peripheral surface is covered with a protective material.

[0002]

2. Description of the Related Art Pipes for fluids such as gas and water are generally rigid bodies made of iron or concrete, and pipes for flowing special liquids or gases in chemical plants etc. are made of resin having high chemical resistance and have an inner peripheral surface. Has been lined.

[0003]

When the pipe is rigid as described above, cracks or cracks are generated when an external force such as an earthquake acts, and fluid in the pipe leaks or foreign matter from the outside enters the pipe. It will flow in. Further, even when the inner peripheral surface of the pipe is provided with a lining, since this lining is for preventing chemical change on the inner peripheral surface of the pipe, it is adhered or fixed to the inner peripheral surface. Since the lining is damaged along with the damage of the pipe, there is a problem similar to the above.

[0004]

Therefore, the present invention is characterized in that a protective member made of an elastic material made of rubber, synthetic resin or the like is arranged in close contact with the inner peripheral surface of the pipe body. According to this structure, when external force acts on the pipe and the pipe body is cracked or cracked, the protective material is in a tight contact state that does not adhere or stick to the inner peripheral surface of the pipe body, and thus the pipe body is damaged. The airtightness and the watertightness are maintained without being affected by the above, and the repair work can be performed without interrupting the supply of the fluid.

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. 1 is a sectional view, FIG. 2 is a sectional view showing a broken state, FIG. 3 is a sectional view showing a repaired state, and FIG. 4 is a sectional view at a branch portion. In the figure, reference numeral 1 denotes a pipe body, which is made of a rigid body such as iron or concrete.

Reference numeral 2 denotes a protective member made of an elastic material such as rubber or synthetic resin, which is disposed in close contact with the inner peripheral surface of the pipe body 1 and generally has an inner diameter of the pipe body 1. Has an outer diameter that is the same as or slightly larger than that, and when it is placed, it is passed through the tube body 1 by applying axial tension to reduce the diameter.
By releasing the tension, it is possible to obtain a close contact state without adhesion or fixation to the inner peripheral surface of the tube body 1. Further, even if an outer diameter smaller than the inner diameter of the pipe main body 1 is used, a close contact state can be obtained as long as pressure can be obtained in the pipe by a fluid such as a water pipe.

At the branching portion, as shown in FIG. 4, a protective material 2 which is made longer than the conduit of the branching portion is prepared in advance,
The protective materials 2 at the connection points are overlapped with each other, and the overlapped portions are bonded by adhesion or heat fusion. Further, at a portion where the pipe diameter changes, a protective material 2 having a different pipe diameter is prepared, and the protective materials 2 at the end portions of the pipes are overlapped with each other in the same manner as described above, and the overlapping portions thereof are joined by adhesion or heat fusion. Good.

The above-mentioned protective material is made of an elastic material using rubber, synthetic resin or the like.
In order to increase the strength, as shown in FIG. 5, it may be a protective material having a composite structure in which a reinforcing material 3 of woven cloth or non-woven cloth made of natural fiber, synthetic fiber, metal or the like is integrally embedded. According to the tube having such a structure, an external force acts on the tube and the tube body 1
When cracks or cracks occur in the tube, the protective material is in a tightly adhered state that does not adhere or adhere to the inner peripheral surface of the tube body 1, so that the tube body 1 is not affected by damage and maintains airtightness and watertightness. However, repair work can be performed without interrupting the supply of fluid.

Further, the repair work only needs to restore the rigidity of the damaged portion. For that purpose, for example, in the case of an iron pipe main body, the iron material 4 is welded to the portion and the concrete fume pipe is used for repair. The net or cloth so that the mortar or the synthetic resin does not drop may be placed on the portion and fixed with the mortar or the synthetic resin for repair.

[0010]

According to the present invention described in detail above, since the protective material made of an elastic material made of rubber, synthetic resin or the like is arranged in close contact with the inner peripheral surface of the pipe body, the protective material is Since the inner peripheral surface of the pipe body is not adhered or fixed, the protective material is not affected by damage such as cracks or cracks in the pipe body, maintains airtightness and watertightness, and shuts off the fluid supply. It has the effect of never happening.

Further, it is not always necessary to replace a damaged pipe, and by repairing the damaged portion of the pipe main body, it is possible to use the pipe continuously.

[Brief description of drawings]

FIG. 1 is a sectional view showing an embodiment.

FIG. 2 is a sectional view showing a damaged state.

FIG. 3 is a sectional view showing a repaired state.

FIG. 4 is a sectional view of a branch portion.

FIG. 5 is a sectional view of a protective material in which a reinforcing material is embedded.

[Explanation of symbols]

 1 Pipe body 2 Protective material 3 Reinforcement material

Claims (2)

[Claims] 1. A pipe characterized in that a protective member made of an elastic material made of rubber, synthetic resin or the like is arranged in close contact with the inner peripheral surface of the pipe main body. 2. The pipe according to claim 1, wherein a reinforcing material is integrally embedded in the protective material.