Method of and means for repairing lateral branches of sub-surface pipe lines专利检索-化学修复整治环境工程环境工程专利检索查询-专利查询网

Method of and means for repairing lateral branches of sub-surface pipe lines

阅读：799发布：2020-09-11

专利汇可以提供Method of and means for repairing lateral branches of sub-surface pipe lines专利检索，专利查询，专利分析的服务。并且This invention is directed to providing a method of and apparatus for repairing faults and breaches in lateral branches of sub-surface pipe lines into which it is impracticable or impossible to introduce sub-surface pipe line repair apparatus. In accordance with the invention such apparatus is employed in the main line with auxilary apparatus introduced into the lateral branch to provide a combination whereby a fault or breach, hereinafter generically designated fault, constituting the source of infiltration into the lateral and hence into the main can be located, and thereafter by introduction of a chemical repair substance from the main line into the lateral branch and through the fault terminate the infiltration and seal the lateral against further infiltration.，下面是Method of and means for repairing lateral branches of sub-surface pipe lines专利的具体信息内容。

权利要求

1. The method of repairing a fault in a tubular sub-surface lateral branch of a sub-surface conduit which comprises locating the branch containing the fault, intrOducing inflatable means into the branch at a point remote from the conduit, projecting said means in the branch to its junction with the conduit, inflating said means to thereby substantially inhibit flow of fluid from the branch to the conduit, retracting said means toward the point of its introduction to the branch to a point between the fault and said point of introduction, discharging into a restricted portion of the conduit communicating with said branch a grout material until said material fills the branch between said inflatable means and said junction and is extruded through the fault, then removing the inflatable means from the branch and the conduit restricting means from the conduit and discharging grout material from the branch into the conduit.

2. The method defined in claim 1 in which the branch containing the fault is identified by visual means through observation of a plurality of junctions of lateral branches with the conduit and that branch observed to conduct greater than normal quantities of liquid to the conduit is subjected to treatment by the repair steps defined in said claim.

3. The method defined in claim 1 in which the inflatable means when positioned in the branch between the fault and said point of introduction to the branch is further inflated to completely obstruct passage of liquid through the branch.

4. The method defined in claim 1 in which the restricted portion of the conduit into which grout material is discharged is defined by inflatable means disposed in the conduit in opposite directions respectively from said junction of the branch and tubular grout material conducting means communicate with said restricted portion within one of said inflatable means and with grout material supplying means disposed at the surface upwardly from said conduit adjacent an opening therein.

5. The method defined in claim 1 in which the grout material deposited in the branch between the fault and the conduit is discharged into the conduit by the force of a stream of liquid introduced into the branch at a point remote from the conduit.

6. In combination with an examination and repair unit for a sub-surface conduit adapted to enter the conduit and afford a visual image of the conduit at a remote observation point, means for supplying grouting material to said unit, inflatable means adapted for insertion in a branch of said conduit and for projection to the junction of the branch with the conduit, means connected with said inflatable means for successively inflating and deflating the same and means for retracting said inflatable means from said junction toward the point of its insertion into the branch.

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Method of and means for repairing lateral branches of sub-surface pipe lines

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