This shutoff system is provided with a straight pipe formed from a polyolefin material, and a knife gate. Along the distal end of the knife gate, a semi-circular arcuate first cutting blade is formed for cutting open the straight pipe to create a slit-like opening. Along the proximal end of the knife gate, a sealing part, in the form of a circularly arced strip, for contacting cut surfaces of the straight pipe is formed. The knife gate has a pair of lateral rims that range between and join the first cutting blade and the sealing part. The first cutting blade and the lateral rims run along the inner peripheral surface of the straight pipe, biting into the inner peripheral surface. The knife gate is formed in a flat plate having a first face and a second face, from the first cutting blade to the sealing part and in the interval between the pair of lateral rims. The opening extends circumferentially along the straight pipe. The sealing part extends from one edge of the opening to another edge, and from the one edge to the other edge, extends from the inner peripheral surface to the outermost peripheral surface on the most-outer side of the straight pipe.
This pipe structure comprises: a straight pipe configured from a polyolefin material; a pair of protrusions configured from a polyolefin material, extending circumferentially along the outer surface of the straight pipe, and separated from each other in the axial direction of the straight pipe; a pipe material having a plurality of metal divided cases that are divided in the circumferential direction of the straight pipe and that enclose part of the straight pipe; and a pair of engaging parts that are formed on at least one of the divided cases and that respectively engage with the pair of protrusions.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
F16L 55/00 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems
This uninterrupted flow construction method comprises a perforation step for perforating an existing pipe (1) with a hole saw (H), and a plug insertion step for inserting a plug into the existing pipe (1) from a cut groove (10), wherein the construction method comprises: a step for preparing, prior to the perforation step, a T-shaped pipe (4) having a semicircular groove (20) cut in a branch pipe section (42) over half of the circumferential direction thereof; a connection step for connecting, after the perforation step, a piping material (6) to the branch pipe section (42) of the T-shaped pipe (4); and after the connection step, a step for taking out a first gate (G1) that has been inserted into the semicircular groove (20). In the plug insertion step, the first gate (G1) is inserted as the plug into the existing pipe (1) from the cut groove (10).
A construction method for forming an opening in a pipe, said method comprising: a step in which a pipe is enclosed in a case divided in the circumferential direction R of the pipe; a thin skin formation step in which the outer surface of the pipe is cut with a cutting tool arranged inside the case, thereby forming in the pipe a groove having a bottom formed of a thin skin; and a suctioning step for removing cutting debris generated by the cutting, by suctioning the debris together with a gas inside the case. After the thin skin formation step and the suctioning step have been carried out, the thin skin is broken to form an opening.
F16L 55/105 - Closing devices introduced radially into the pipe or hose
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
F16L 55/00 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems
5.
INSERTION OF BUTTERFLY VALVE DEVICE UNDER CONTINUOUS FLOW
The present invention comprises: an assembly step for attaching a sealed case in an existing pipe; a cutting step for forming a first groove-like opening extending in the pipe axis direction of the existing pipe; a second drilling step for forming a circular second opening at a location on the existing pipe facing the first opening; and an insertion step for inserting a butterfly-shaped valve body, which is in an open state and is integrated with a valve shaft passing through the first and second openings, through the first opening into the existing pipe 1 until the tip-end portion of the valve shaft protrudes from the second opening.
The present uninterrupted flow construction method: encloses a portion of an existing pipe with a sealing case; connects a boring machine to the sealing case without interposing a working valve between a protruding pipe section of the sealing case and the boring machine; forms a circular hole at a site of the existing pipe in the protruding pipe section using a hole saw of the boring machine; rotates the T-pipe and boring machine in the circumferential direction of the existing pipe to a position such that the protruding pipe section completely clears the hole; after the rotation, maintains a sealed state in which application of pressure from fluid inside the existing pipe on the protruding pipe section is prevented by seal packing; and in the sealed state, detaches the boring machine from the protruding pipe section.
A valve regeneration method is provided with: a replacing step of replacing an old bolt (55) and nut (56) attaching a valve cover (54) to a valve box (53) of a valve (50) with a new bolt (2B) and nut (5N); an enclosing step of enclosing, after the replacement, an upper structure (59) including the valve cover (54) above the valve box (53) of the valve (50) with a tank (T) having a work valve (V); a step of removing the new bolt (2B) or nut (5N) by operating from outside the tank (T); an extracting step of extracting the upper structure (59) and a valve body (5V) inside the valve cover (54) by opening and closing the work valve (V); and an attaching step of attaching the upper structure (59) or the new valve cover (54) and the new valve body (5V) to the valve box (53).
F16K 43/00 - Auxiliary closure means in valves, which in case of repair, e.g. rewashering, of the valve, can take over the function of the normal closure means; Devices for temporary replacement of parts of valves for the same purpose
E03B 7/07 - Arrangement of devices, e.g. filters, flow controls, measuring devices, siphons, valves, in the pipe systems
8.
UNINTERRUPTED FLOW DEVICE AND UNINTERRUPTED FLOW CONSTRUCTION METHOD
The present invention is provided with: a sealed case having a branched opening extending in the radial direction of an existing tube and formed in a first split case; and a rubber gasket sealing between the sealed case and the existing tube. A flange for attaching/removing a piercing machine is provided to the first split case. The sealed case can move reciprocally in the axial direction of the tube. The rubber gasket is formed with: a first sealing region that encircles the position of the sealed case to which the branched opening is provided and that occludes the branched opening; and a second sealing region that is adjacent to the first sealing section and is sealed from the first seal region, is offset from the first sealing region in the axial direction of the tube, and has a size able to occlude the opening pierced by a cutter. An allowance space that is clearance for a second sealing ring is formed between a gasket device groove and the second sealing ring.
The present invention provides a pipe joint configured so that when a lock body (20) is no longer being pressed by a press bolt (30), the lock body (20) slips off the outer periphery of a second pipe (120) into which a claw (21) had been engaged and so that loss of the lock body (20) is prevented during transport or the like; and when an external force acts in the direction in which the second pipe (120) slips out of a first pipe (110), a sufficient tilting range can be obtained. The pipe joint is provided with an annular press ring (10) attached at the exterior of the insertion end (121) of the second pipe (120), the lock body (20) having the claw (21) that bites into the outer periphery of the second pipe (120), the press bolt (30) for causing the lock body (20) to project from the inner periphery of the press ring (10), and an elastic member (40) for holding the lock body (20). The press ring (10) is provided with a pressing part (11) and an acting part (13) that has a space (13d). The elastic member (40) is stretchable and is configured so as to pull the lock body (20) along the inclined surface (13f) of the space (13d), retract the claw (21) of the lock body (20) into the space (13d), and cause the claw (21) to project from the inside of the space (13d).
F16L 21/08 - Joints with sleeve or socket with additional locking means
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
Provided is a pipe joint configured in such a manner that a claw section (21) which bites into the outer peripheral surface of a second pipe (120) comes out of the outer peripheral surface when an engagement body (20) is no longer pressed by a pressing bolt (30), that the engagement body (20) is not lost during conveyance, etc., and that the tilt range of the pipe joint when an external force acting in the direction in which the second pipe (120) comes out of the first pipe (110) is applied is sufficient. The pipe joint is provided with: an annular pressing ring (10) fitted over the insertion end (121) of the second pipe (120); the engagement body (20) having the claw section (21) biting into the outer peripheral surface of the second pipe (120); a pressing bolt (30) for causing the engagement body (20) to protrude from the inner peripheral surface of the pressing ring (10); and an elastic member (40) for holding the engagement body (20). The pressing ring (10) comprises a pressing section (11) and an action section (13) which is provided with a space section (13d). The elastic member (40) is stretchable and is adapted to pull in the engagement body (20) along the sloped surface (13f) of the space section (13d), retract the claw section (21) of the engagement body (20) into the space section (13d), and cause the claw section (21) to protrude from the inside of the space section (13d).
F16L 21/04 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings in which sealing rings are compressed by axially-movable members
F16L 21/08 - Joints with sleeve or socket with additional locking means
11.
DEVICE FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW, AND METHOD FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW
A device for work implementation without stopping flow is provided with a sealed case (20) having a bifurcation-like branch hole (23) which is formed in a first divided case (21) and extends in a radial direction (C) of an existing pipe (1), and a rubber gasket (30) which seals the gap between the sealed case (20) and the existing pipe (1). A flange (28) for mounting and removing a boring machine (3) is provided in the first divided case (21). The sealed case (20) is capable of reciprocating in the pipe axial direction (L). The rubber gasket (30) forms a first sealed region (S1) which surrounds that area of the sealed case (20) where the branch hole (23) is provided, thereby covering up the branch hole (23); and a second sealed region (S2) which is adjacent to the first sealed region (S1) and is sealed with respect to the first sealed region (S1), which is located away from the first sealed region (S1) in the pipe axial direction (L), and which has a size large enough to be capable of covering up a hole bored by a cutter (3a).
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
F16L 55/00 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems
A gear case part (70), which has an upper aperture that opens upward and which forms a recess that houses a portion of a drive gear device (63) and for which the drive gear device (63) can be inserted from the upper aperture and assembled, is provided integrally on the upper part of a first or second divided case (21, 22); a cover (66) that blocks the upper aperture of the gear case part (70) is fastened to the gear case part (70); an operating part (67) protrudes upward from a through-hole (66a) that vertically penetrates the cover (66); and by removing the cover (66) from the gear case part (70), the drive gear device (63) can be extracted from the gear case part (70) through the upper aperture.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
A branch device for noninterruptive flow boring suitable for connecting branch piping with an existing pipe (1) by partially boring the pipe wall (12) of the existing pipe (1) using a boring machine (3) equipped with a hole saw (4) and forming an opening (11) in the pipe wall (12) comprises a plurality of cases (21, 22) split in the circumferential direction R of the existing pipe (1), an enclosed case (20) formed integrally with the first split case (21) out of the plurality of split cases (21, 22) and having a pipe portion (27) projecting in the radial direction C of the existing pipe (1) and branching, a valve element (5) having an arcuate or circular cross-section and opening/closing the opening (28) of the branch pipe portion (27) by rotating along the circumferential direction R of the existing pipe (1) between the inner circumferential surface (29) of the split case (20) and the outer circumferential surface (13) of the existing pipe (1), and a mechanism (50) for rotating the valve element (5).
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluids; Fittings therefor making use of attaching means embracing the pipe
F16L 55/00 - Devices or appurtenances for use in, or in connection with, pipes or pipe systems
14.
NON-BOLT JOINT STRUCTURE AND METHOD FOR FORMING NON-BOLT JOINT STRUCTURE
A non-bolt joint structure comprising a seal ring (3) for sealing between the receiving end (1a) and the inserting end (2a), a means (11) provided on the inner circumference of the receiving end (1a) and engaging with the outer circumferential surface (25) of a polyethylene pipe (2) to prevent separation of the polyethylene pipe (2) from the receiving end (1a), and a tubular metallic inner core (4) fitted to the inner circumference (26) at the inserting end (2a) of the polyethylene pipe (2) characterized in that the inner core (4) is deformed plastically and includes a first portion (40) having a longitudinal section swelling radially outward, a second portion (20) is formed along the first portion (40) of the inner core (4) such that the inserting end (2a) of the polyethylene pipe (2) swells radially outward, and the engaging means (11) engages with the outer circumferential surface (25) of the second swelling portion (20) to prevent separation of the polyethylene pipe (2).
F16L 13/14 - Non-disconnectable pipe joints, e.g. soldered, adhesive, or caulked joints made by plastically deforming the material of the pipe, e.g. by flanging, rolling
F16L 17/02 - Joints with packing adapted to sealing by fluid pressure with sealing rings arranged between outer surface of pipe and inner surface of sleeve or socket
F16L 21/02 - Joints with sleeve or socket with elastic sealing rings between pipe and sleeve or between pipe and socket, e.g. with rolling or other prefabricated profiled rings
F16L 21/08 - Joints with sleeve or socket with additional locking means
patents
