Abstract

To provide a blocking device and method capable of safely blocking a fluid tube. A blocking device (1) that introduces a bag (50) into a fluid tube (1), and expands the bag (50) by pressure of fluid to block the inside of the fluid tube (50), the blocking device (1) including a cylinder (20) connectable to the fluid tube (1); a guide pipe (30) provided to be movable forward and backward in an axial direction of the cylinder (20) in the cylinder (20) and formed with a notch (32) for passing the bag (50) at a tip end; and a slide tube (40) inserted into the guide pipe (30) and provided to be movable forward and backward in the axial direction, and having a tip end portion connected to the bag (50) and a basal end portion connected to a fluid source (60) for expanding the bag (50); where the bag (50) is expanded in a state in which the guide pipe (30) is withdrawn from the fluid tube (1).

IPC Classes  ?

• F16L 55/124 - Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose

Abstract

Provided are blocking device and method which can safely block a fluid tube. A blocking device (1) according to the present invention introduces a bag (50) into a fluid tube (1) and blocks the inside of the fluid tube (50) by expanding the bag (50) with the pressure of a fluid, said blocking device (1) comprising: a cylinder (20) which is connectable to the fluid tube (1); a guide pipe (30) which is provided in the cylinder (20) so as to be movable forward and backward in the axis direction of the cylinder (20) and at the tip of which is formed a notch (32) for passing the bag (50) therethrough; and a slide tube (40) which is inserted into the guide pipe (30) so as to be movable forward and backward in the axis direction, which has a tip end portion that is connected to the bag (50), and which has a base end portion that is connected to a fluid source (60) for expanding the bag (50), wherein the bag (50) is expanded in a state in which the guide pipe (30) is withdrawn from the fluid tube (1).

IPC Classes  ?

• F16L 55/124 - Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced radially into the pipe or hose

Abstract

The present invention prevents damage to an internal bag in an insertion path into a water pipe. An inflatable internal bag (2) is enclosed by an external bag (3). A vent (2a) of the internal bag (2) into which a cap (4) is inserted and attached and a hose (5) connected to the cap (4) are externally fitted and crimped by a caulking ring (6) via a mouth (3a) of the external bag (3). The cap (4) has a cylindrical barrel (4a) inserted and fitted into the vent (2a). An outward opening (4d) of the barrel (4a) is provided so as to project outward from the vent (2a), and is inserted and fitted into a tip-end opening (5a) of the hose (5). A rope (10) with a smaller diameter than the outward opening (4d) is passed through the hose (5), the rope (10) having, at a base end thereof, a stopper (9) that can be engaged with an end surface of a base end opening (5b). The rope (10) has, at a tip-end thereof, a stopper (11) with a diameter slightly smaller than the inside diameter of the barrel (4a). The stopper (11) is placed in the barrel (4a) so that a front surface of the stopper (11) becomes substantially flush with an inward opening end surface (4c) of the barrel (4a) by adjusting the length of the rope (10) when the internal bag (2) is in a deflated state.

IPC Classes  ?

• F16L 55/128 - Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose
• F16L 55/134 - Means for stopping flow in pipes or hoses by introducing into the pipe a member expandable in situ introduced axially into the pipe or hose the closure device being a plug fixed by radially deforming the packing by means of an inflatable packing

Goods & Services

Metals and their alloys; Ores; Metal materials for building or construction; Manhole covers; Metal groove lids; Water-pipes; Metal junctions for pipes; Metal flanges; Metal hardware; Metal stoppers; Metal molds; Pipe stopping apparatus made of metal; Metal valves for water pipe; Metal valves (not including machine parts). Metalworking machines and tools. Tap water faucets; Valves for water-pipes; Valves for gas-pipes; Attachment device for safety of gas-pipe, gas appliances, water supply pipes or water supply appliances. Parts and fittings for automobiles. Gaskets; Junctions for pipes [not of metal]; Packings. Construction; Construction consultancy; Water utility construction; Plumbing; Plumbing consultancy; Check, repair or maintenance of gas-pipes; Check, repair or maintenance of water-pipes; Various plumbing which is done without stopping the flow of fluid in the existing pipes. Surveying; Designing for pipe arrangement; Geological surveys or research; Consultancy and providing information for geological surveys or research.

Goods & Services

Metals and their alloys; Ores; Metal materials for building or construction; Manhole covers; Metal groove lids; Water-pipes; Metal junctions for pipes; Metal flanges; Metal hardware; Metal stoppers; Metal molds; Pipe stopping apparatus made of metal; Metal valves for water pipe; Metal valves (not including machine parts). Metalworking machines and tools. Tap water faucets; Valves for water-pipes; Valves for gas-pipes; Attachment device for safety of gas-pipe, gas appliances, water supply pipes or water supply appliances. Parts and fittings for automobiles. Gaskets; Junctions for pipes [not of metal]; Packings. Construction; Construction consultancy; Water utility construction; Plumbing; Plumbing consultancy; Check, repair or maintenance of gas-pipes; Check, repair or maintenance of water-pipes; Various plumbing which is done without stopping the flow of fluid in the existing pipes. Surveying; Designing for pipe arrangement; Geological surveys or research; Consultancy and providing information for geological surveys or research.