A shut-off system of the present invention includes a straight pipe made of a polyolefin-based material, and a knife gate, wherein: a semicircular arc-shaped first cutting blade is formed on a distal end side of the knife gate to cut open the straight pipe to form a slit-shaped opening; an arc band-shaped sealing portion is formed on a proximal end side of the knife gate to be in contact with cut surfaces of the straight pipe; the knife gate includes a pair of side edge portions that connect the first cutting blade and the sealing portion; the first cutting blade and the side edge portions bite into an inner circumference surface of the straight pipe along the inner circumference surface; the knife gate is formed in a flat plate shape having a first surface and a second surface, extending from the first cutting blade to the sealing portion and between the pair of side edge portions; the opening extends in a circumferential direction on the straight pipe; and the sealing portion extends from one end of the opening to the other end thereof, and extends from the inner circumference surface to an outermost surface, which is on an outermost side, of the straight pipe.
F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
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.
A structure including: a straight pipe made of a polyolefin-based material; a pair of ridges made of a polyolefin-based material, extending in a circumferential direction along an outer surface of the straight pipe, and spaced apart from each other in an axial direction of the straight pipe; a piping material including a plurality of metal-made separate cases, which are separated from each other in the circumferential direction of the straight pipe and enclose a portion of the straight pipe; and a pair of engagement portions formed on at least one of the separate cases and engaging respectively with the pair of ridges.
B29C 65/04 - Dielectric heating, e.g. high-frequency welding
B29C 65/00 - Joining of preformed partsApparatus therefor
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings therefor making use of attaching means embracing the pipe
A piping structure and a process, with which it is possible to form an opening in a pipe while preventing shavings produced from cutting from entering the pipe. A process for forming an opening in a pipe, including: a step of enclosing the pipe with a case divided in a circumferential direction R of the pipe; a skin formation step of cutting an outer surface of the pipe with a cutting tool arranged in the case, thereby forming a bottomed groove, which is formed as a skin, on the pipe; a suction step of sucking shavings produced from cutting, together with a gas in the case in order to remove the shavings; and breaking the skin to form the opening after performing the skin formation step and the suction step.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings therefor making use of attaching means embracing the pipe
F16L 55/105 - Closing devices introduced radially into the pipe or hose
6.
Insertion of butterfly valve without disrupting flow
A process including: an assembly step of assembling a sealed case onto an existing pipe; a cutting step of forming a first opening of a groove shape elongated in a pipe axis direction of the existing pipe; a second boring step of forming a circular second opening at a position of the existing pipe that opposes the first opening; and an insertion step of inserting, in a valve-open state, a butterfly-shaped valve element that is integral with a valve rod, which runs through the first and second openings, into the existing pipe 1 through the first opening until a tip portion of the valve rod protrudes from the second opening.
F16K 27/02 - Construction of housingsUse of materials therefor of lift valves
F16K 3/22 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with sealing faces shaped as surfaces of solids of revolution
F16K 41/08 - Spindle sealings with stuffing-box with at least one ring provided with axially-protruding peripheral closing-lip
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings 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 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 fluidsFittings 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 fluidsFittings 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
10.
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 flow-undisrupted process includes: enclosing a portion of an existing pipe with a sealing case; connecting a boring machine to the sealing case in a non-valve state in which no operation valve is interposed between a projecting pipe portion of the sealing case and the boring machine; forming a circular opening in an area of the existing pipe corresponding to the projecting pipe portion by means of a hole saw of the boring machine; rotating a tee and the boring machine in a circumferential direction of the existing pipe to a position at which the projecting pipe portion is completely past the opening; after the rotation, maintaining a sealed state in which the seal packing prevents a pressure of a fluid inside the existing pipe from being applied to the projecting pipe portion; and removing the boring machine from the projecting pipe portion in the sealed state.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings therefor making use of attaching means embracing the pipe
B23B 41/00 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor
F16L 41/08 - Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe
F16K 1/22 - Lift valves, i.e. cut-off apparatus with closure members having at least a component of their opening and closing motion perpendicular to the closing faces with pivoted closure members with pivoted discs or flaps with axis of rotation crossing the valve member, e.g. butterfly valves
The present flow-undisrupted process includes: enclosing a portion of an existing pipe with a sealing case; connecting a boring machine to the sealing case in a non-valve state in which no operation valve is interposed between a projecting pipe portion of the sealing case and the boring machine; forming a circular opening in an area of the existing pipe corresponding to the projecting pipe portion by means of a hole saw of the boring machine; rotating a tee and the boring machine in a circumferential direction of the existing pipe to a position at which the projecting pipe portion is completely past the opening; after the rotation, maintaining a sealed state in which the seal packing prevents a pressure of a fluid inside the existing pipe from being applied to the projecting pipe portion; and removing the boring machine from the projecting pipe portion in the sealed state.
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.
An apparatus including: a sealing case having a branch hole formed in a first separate case and extending in the radial direction of an existing pipe; and a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the first separate case has a flange for attachment and removal of a boring machine; the sealing case reciprocates in a pipe axis direction; the rubber packing forms; a first sealed area surrounding a portion of the sealing case for shutting the branch hole; a second sealed area being adjacent to, sealed against, displaced from the first sealed area in the pipe axis direction, and sized so as to be able to shut the opening bored by a cutter; and a tolerance space, into which a second seal ring escapes, is formed between a packing attachment groove and the second seal ring.
F16L 55/18 - Appliances for use in repairing pipes
F16L 55/10 - Means for stopping flow in pipes or hoses
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings therefor making use of attaching means embracing the pipe
F16L 41/16 - Joining pipes to walls or pipes, the joined pipe axis being perpendicular to the plane of a wall or to the axis of another pipe the branch pipe comprising fluid cut-off means
F16K 3/02 - Gate valves or sliding valves, i.e. cut-off apparatus with closing members having a sliding movement along the seat for opening and closing with flat sealing facesPackings therefor
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 meansDevices 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 or valves, in the pipe systems
16.
DEVICE FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW, AND METHOD FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW
An apparatus including: a sealing case having a branch hole formed in a first separate case and extending in the radial direction of an existing pipe; and a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the first separate case has a flange for attachment and removal of a boring machine; the sealing case reciprocates in a pipe axis direction; the rubber packing forms: a first sealed area surrounding a portion of the sealing case for shutting the branch hole; a second sealed area being adjacent to, sealed against, displaced from the first sealed area in the pipe axis direction, and sized so as to be able to shut the opening bored by a cutter; and a tolerance space, into which a second seal ring escapes, is formed between a packing attachment groove and the second seal ring.
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.
An apparatus including: a sealing case including separate cases and enclosing a portion of an existing pipe, and a valve cover portion attached to a branch pipe portion protruding upwardly from the existing pipe; a gate valve body accommodated by the valve cover portion and the branch pipe portion to be intruded into the existing pipe to stop the flow of the fluid through the existing pipe; an operation valve body having an arc-shaped lateral cross section for opening/closing a branch hole formed in the branch pipe portion by rotating in the circumferential direction of the existing pipe; and a rotation mechanism for rotating the operation valve body, the rotation mechanism including: an operation portion; a driving gear unit which rotates; and a driven gear for rotating the operation valve body in the circumferential direction of the existing pipe following the rotation of the driving gear unit.
B23B 41/08 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring, drilling, or tapping holes in tubes under fluid or gas pressure
F16L 55/10 - Means for stopping flow in pipes or hoses
B23B 41/08 - Boring or drilling machines or devices specially adapted for particular workAccessories specially adapted therefor for boring, drilling, or tapping holes in tubes under fluid or gas pressure
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
22.
DEVICE FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW, AND METHOD FOR WORK IMPLEMENTATION WITHOUT STOPPING FLOW
An apparatus including: a sealing case having a branch-shaped branch hole formed in a first separate case and extending in the radial direction of an existing pipe; and a rubber packing for sealing a gap between the sealing case and the existing pipe, wherein: the first separate case is provided with a flange for allowing for attachment and removal of a boring machine; the sealing case is capable of reciprocating in the pipe axis direction; and the rubber packing forms: a first sealed area surrounding a portion of the sealing case where the branch hole is provided for shutting the branch hole; and a second sealed area being adjacent to the first sealed area, sealed against the first sealed area, displaced from the first sealed area in the pipe axis direction, and sized so as to be able to shut the opening bored by a cutter.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings 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
23.
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 fluidsFittings 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
24.
Branching unit for boring without stopping passage of fluid
a) 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.
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 fluidsFittings therefor making use of attaching means embracing the pipe
26.
Branching unit for boring without stopping passage of fluid
A branching unit for boring without stopping passage of fluid, which is suitable for forming an opening 11 at a pipe wall 12 by boring a part of the pipe wall 12 of an existing pipe 1 using a drill machine 3 having a hole saw 4 to connect a branch pipe to the existing pipe, comprising: a sealing case 20 having plurality of separate casing 21, 22 separated in a circumferential direction R and a branch pipe portion 27 protruding and branching off in the radial direction C; a valve body 5 rotating between an inner circumferential surface 29 of the separate casing 21, 22 and an outer circumferential surface 13 of the existing pipe 1 to open and close a branch hole 28; and a rotation mechanism 50 rotating the valve body 5.
A branching unit for boring without stopping passage of fluid, which is suitable for forming an opening 11 at a pipe wall 12 by boring a part of the pipe wall 12 of an existing pipe 1 using a drill machine 3 having a hole saw 4 to connect a branch pipe to the existing pipe 1, comprising: a sealing case 20 having plurality of separate casing 21, 22 separated in a circumferential direction R and, a branch pipe portion 27 formed integrally with a first separate casing 21 of the casings 21, 22 , protruding and branching off in the radial direction C; a valve body 5, which is arc shaped or circular shape, rotating between an inner circumferential surface 29 of the sealing case 20 and an outer circumferential surface 13 of the existing pipe 1 to open and close a branch hole 28 of the branch pipe portion 27; and a rotation mechanism 50 rotating the valve body 5.
F16L 41/06 - Tapping pipe walls, i.e. making connections through the walls of pipes while they are carrying fluidsFittings 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 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 fluidsFittings 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
29.
NON-BOLT JOINT STRUCTURE AND METHOD FOR PRODUCING NON-BOLT JOINT STRUCTURE
A non-bolt joint structure comprising; a packing ring 3 sealing between a receiving opening section 1a and an insertion opening section 2a; an engaging means 11 provided with an inner circumference 26 of the receiving opening section 1a preventing a polyethylene pipe 2 from disengaging from the receiving opening section 1a by engaging with an outer circumferential surface 25 of the polyethylene pipe 2; and a tubular metallic inner core 4 fitting an inner circumference 26 of the insertion opening section 2a of the polyethylene pipe 2, wherein the inner core 4 is plastically deformed to include a first bulge portion 40 that its cross-sectional shape bulges toward an outward radial direction, a second bulge portion 20 is formed so that the insertion opening section 2a of the polyethylene pipe 2 bulges toward the outward radial direction along the first bulge portion 40 of the inner core 4, and the polyethylene pipe 2 is prevented from disengaging by the engaging means 11 engaging with the outer circumferential surface of the second bulge portion 20.
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
30.
Non-bolt joint structure and method for producing non-bolt joint structure
A non-bolt joint structure comprising; a packing ring sealing between a receiving opening section and an insertion opening section; an engaging means provided with an inner circumference of the receiving opening section preventing a polyethylene pipe from disengaging from the receiving opening section by engaging with an outer circumferential surface of the polyethylene pipe; and a tubular metallic inner core fitting an inner circumference of the insertion opening section of the polyethylene pipe, wherein the inner core is plastically deformed to include a first bulge portion that its cross-sectional shape bulges toward an outward radial direction, a second bulge portion is formed so that the insertion opening section of the polyethylene pipe bulges toward the outward radial direction along the first bulge portion of the inner core, and the polyethylene pipe is prevented from disengaging by the engaging means engaging with the outer circumferential surface of the second bulge portion.
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
