Abstract: A split T-shaped pipe serving as a housing device and comprising: an annular case body that has a split part in at least one location in the circumferential direction, and that surrounds the outer circumferential surface of a water pipe in a sealed state with a seal material therebetween; and fasteners for tightening the split part, thereby joining a plurality of split pieces constituting the case body. Joining surfaces are provided at the circumferential end portions of the split pieces, and protrusions protruding along the circumferential direction are formed on the joining surfaces but only at both end portions of the case body in the pipe axis direction of the water pipe.

Abstract: Provided are a highly durable and compact gate valve and a method of installing the gate valve. The gate valve includes a valve cage 12 accommodating a valve body and a sealing band 13 covering between a pair of fluid pipes W and the valve cage 12 under a sealed state. The valve cage 12 includes a pair of protruding tubular portion 12B protruding in a pipe axis direction X from a valve cage body. The sealing band 13 includes a pair of main body portions B1 covering the respective fluid pipes W1, W2 and the protruding tubular portions 12B under a sealed state and a connecting portion B3 connecting the pair of main body portions B1 and formed unitarily therewith and is constituted of a plurality of split members Ba split in a circumferential direction of the fluid pipes W.

Abstract: A pipe joint is configured such that an inserting pipe portion is inserted along a pipe axis direction to a receiving pipe portion having a flange portion to be connected thereto. The pipe joint includes a protruding portion having an integral construction, the protruding portion being fixed to an outer circumferential face of the inserting pipe portion and protruding radially outwards therefrom, a stopper member having an annular integral construction, the stopper member coming into contact with a first lateral face of the protruding portion to restrict displacement of the inserting pipe portion in a direction away from the receiving pipe portion, a fastening member configured to fasten the flange portion to the stopper member.

Abstract: A hermetically sealing device has a sealing main-body and a rubber seal adhered to the sealing main-body. The rubber seal includes an inner lip, a slit and an outer lip. The inner lip extends along a periphery of the bored opening, and includes an outer-circumference surface that extends forward and inclines toward an inner-circumference side. The slit is formed on an outer-circumference side relative to the inner lip. An outer-surface-side edge of the bored opening enters the slit. The outer lip is formed on an outer-circumference side relative to the slit that is formed on an outer-circumference side relative to the inner lip, and transforms in such a manner that the outer lip extends toward an outer-circumference side to be hermetically in contact with an outer surface of the periphery of the bored opening.

Abstract: A gate valve includes a valve body for insertion through a through-hole formed in the fluid pipe, and a movement mechanism for moving the valve body along the diameter direction, and the valve body includes a valve main body and a seal member that is capable of undergoing elastic deformation and is provided on a holding portion of the valve main body. A core member formed from a material harder than the seal member is embedded between an outer face of the seal member, which is on the lower side in the movement direction, and a leading end face on the protruding side of the holding portion.

Abstract: A valve device has an outer valve casing externally fitted to an existing fluid pipe, an inner valve casing housed in the outer valve casing and an inner packing for sealing a gap between them. The inner packing includes an annular portion mounted along a periphery of an upper side surface of the inner valve casing and a plurality of U-shaped portions extending downward from the annular portion and to be mounted over an entire length from a side surface to a bottom surface of the inner valve casing. An enclosed space sandwiched between an inner surface of the outer valve casing and an outer surface of the inner valve casing is formed between the U-shaped portions that are adjacent to each other. The inner packing is provided with a connecting portion for connecting the plurality of U-shaped portions to one another.

Abstract: An apparatus includes a telescopic double tubular member accommodated in an outer case that is mounted so as to surround an outer circumferential surface of a water pipe, and placed between a pair of cut faces. The double tubular member includes an anti-corrosion member that faces the pair of cut faces and a core member, and is configured such that the anti-corrosion member is radially expanded by the core member, so as to be pressed against the pair of cut faces. The anti-corrosion member has a through hole that communicates with the water pipe, and a flange positioned above the through hole and extending radially outward. The flange has an abutment surface that abuts an outer circumferential surface of the water pipe, and this abutment surface is curved along the outer circumferential surface of the water pipe.

Abstract: There is provided a coated expandable-contractible flexible pipe capable of properly securing the anti-corrosive performance without damaging a coating even in the case where the coated expandable-contractible flexible pipe coated with the coating oscillates or expands/contracts. The coated expandable-contractible flexible pipe includes: an expandable-contractible flexible pipe having a pair of joints to be connected to a fluid pipe and a connecting pipe for connecting the joints to each other, the pair of joints being mutually oscillatable and expandable/contractible; and a resin or rubber coating that coats the expandable-contractible flexible pipe. The coating includes a joint coating portion in close contact with the joint, a pipe coating portion in close contact with the connecting pipe 3, and a looseness portion formed between the joint coating portion and the pipe coating portion so as to allow the oscillation or expansion of the expandable-contractible flexible pipe.

Abstract: Extending/contracting flexible pipe that has weather resistance, a structure in which a tie rod can properly exhibit its function, and easy assembly. The pipe including: a pair of joint sections (1) configured to be oscillatable and extendable/contractile with respect to each other; an attachment section (10) formed at the outer periphery of each of the pair of joint sections; a tie rod (5) inserted into rod holes (11) formed at the attachment sections and bridged across both of the attachment sections; and a washer (6) and nut (7) for fixing the tie rod to the attachment sections. An annular spacer (8) made of an elastic member is fixed to the tie rod. The washer is located at a position at which the rod hole is closed in the state in which the spacer is disposed inside of the rod hole, so that the washer shields the spacer from the outside.

Abstract: An extendable and contractible flexible joint having a pair of flexible joint portions, which are bendable and fitted and connected to a connection sleeve, in a direction of a pipe axial line. An extending motion limiting portion includes a fluid chamber into which a portion of a pressure fluid in a flow path diverges and flows, and is configured to apply a fluid pressure applied to pressure receiving surfaces of the fluid chamber. An inner joint body of each of both the flexible joint portions is configured to be attachable and detachable to and from the connection sleeve, and an outer joint body and the inner joint body of each of both the flexible joint portions are configured to be attachable and detachable to and from each other.

Abstract: A pipe joint is provided with a pressing ring, a pipe or a pipe joint body having a containing section, a tightening element, and a packing ring compressed by being pressed by the pressing ring moved by the operation of the tightening element. The packing ring includes a base section fitted and mounted in the containing section at a rear thereof, a seal section contained within the containing section at a front thereof, and a connection section which connects the base section and the seal section and has a cutout groove. When the packing ring positioned by fitting and mounting the base section in the containing section at the rear thereof is subjected to pressing by the pressing ring, the seal section is bent into the cutout groove and is deformed, and compression caused by the deformation creates a sealed state.

Abstract: An insertion guide tube that is inserted into a sealing case and that houses a blockage bag in a reduced-size state can be moved inside the sealing case and inside a branch pipe portion along an axis of the branch pipe portion until the insertion guide tube is brought into an abutting position in which at least a part of a leading end portion of the insertion guide tube abuts against an outer surface-side peripheral edge portion of a branch port on an outer circumferential surface of a fluid pipe. In a state in which the blockage bag is located at a predetermined internal flow passage blocking position, an axis adjustment portion that can make sliding contact with an inner surface of the insertion guide tube is located in a portion corresponding to branch port in a radial direction of the fluid pipe.

Abstract: There is provided an extending/contracting flexible pipe that certainly has not only weather resistance but also a structure in which a tie rod can properly exhibit its function and assembly is easy. The pipe including: a pair of joint sections 1 configured to be oscillatable and extendable/contractile with respect to each other; an attachment section 10 formed at the outer periphery of each of the pair of joint sections 1; a tie rod 5 that is inserted into rod holes 11 formed at the attachment sections 10 and is bridged across both of the attachment sections 10; and a washer 6 and a nut 7 for fixing the tie rod 5 to the attachment sections 10. An annular spacer 8 made of an elastic member is fixed to the tie rod 5. The washer 6 is located at a position at which the rod hole 11 is closed in the state in which the spacer 8 is disposed inside of the rod hole 11, so that the washer 6 shields the spacer 8 from the outside.

Abstract: An operation for securing and coupling a coupling flange and a fluid device mounted through the interior of a valve case of a sluice valve for operations can be performed with good efficiency from the exterior while sufficiently ensuring the external mounting depth of the coupling tube part on the coupling flange and while facilitating the attachment of pulling and securing means and ensuring the attachment strength.

Abstract: A separation prevention device for a pipe joint has disengagement prevention members and a press member. The disengagement prevention members are disposed at a plurality of locations in a circumferential direction of the pipe, on an inner peripheral surface of an engaging tool or of a receiving opening itself and which are formed with claws. The press member presses the disengagement prevention member radially inward of the pipe and which engages the claw with the outer peripheral surface of an inserting opening. The claw of the disengagement prevention member and the claw of the disengagement prevention member which is adjacent to the former disengagement prevention member in the circumferential direction of the pipe are arranged so as to overlap on each other in the axial direction of the pipe in a state where the claws are engaged with the outer peripheral surface of the inserting opening.

Abstract: A pipe joint is provided with a pressing ring, a pipe or a pipe joint body which having a containing section, a tightening element, and a packing ring compressed by being pressed by the pressing ring moved by the operation of the tightening element. The packing ring includes a base section fitted and mounted in the containing section at a rear thereof, a seal section contained within the containing section at a front thereof, and a connection section which connects the base section and the seal section and has a cutout groove. When the packing ring positioned by fitting and mounting the base section in the containing section at the rear thereof is subjected to pressing by the pressing ring, the seal section is bent into the cutout groove and is deformed, and compression caused by the deformation creates a sealed state.

Abstract: A separation prevention device for a pipe joint has disengagement prevention members and a press member. The disengagement prevention members are disposed at a plurality of locations in a circumferential direction of the pipe, on an inner peripheral surface of an engaging tool or of a receiving opening itself and which are formed with claws. The press member presses the disengagement prevention member radially inward of the pipe and which engages the claw with the outer peripheral surface of an inserting opening. The claw of the disengagement prevention member and the claw of the disengagement prevention member which is adjacent to the former disengagement prevention member in the circumferential direction of the pipe are arranged so as to overlap on each other in the axial direction of the pipe in a state where the claws are engaged with the outer peripheral surface of the inserting opening.

Abstract: A separation prevention device for a pipe joint has disengagement prevention members and a press member. The disengagement prevention members are disposed at a plurality of locations in a circumferential direction of the pipe, on an inner peripheral surface of an engaging tool or of a receiving opening itself and which are formed with claws. The press member presses the disengagement prevention member radially inward of the pipe and which engages the claw with the outer peripheral surface of an inserting opening. The claw of the disengagement prevention member and the claw of the disengagement prevention member which is adjacent to the former disengagement prevention member in the circumferential direction of the pipe are arranged so as to overlap on each other in the axial direction of the pipe in a state where the claws are engaged with the outer peripheral surface of the inserting opening.

Abstract: An operation for securing and coupling a coupling flange and a fluid device mounted through the interior of a valve case of a sluice valve for operations can be performed with good efficiency from the exterior while sufficiently ensuring the external mounting depth of the coupling tube part on the coupling flange and while facilitating the attachment of pulling and securing means and ensuring the attachment strength.

Abstract: To enable efficient and easy attachment of a shutoff operation cover at a proper attaching position relative to two joining flange portions and also to restrict deformation in a leading end portion of a gate plate valve. A shutoff operation cover B is attached to two pipe portions 2, 3 jointed and fastened together with a fastener 5. The shutoff operation cover B is capable of surrounding outer peripheries of the two joining flange portions 2A, 3A under a sealed condition, and there is provided a gate plate valve 10 in the form of a thin plate, the valve being insertable and withdrawable for shutting off conduits of the two pipe portions 2, 3. As the gate plate valve 10 is inserted to a conduit shutting position through a gap S formed between the two joining flange portions 2A, 3A in association with a loosening operation of the fastener 5, the conduit is shut off between the two joining flange portions 2A, 3A.