Provided is a pipe detachment preventing device, for a union nut pipe fitting, which can omit an inner core and which can prevent detachment of a pipe from a pipe fitting even when a large pulling force which stretches the pipe acts. Connection holding means (7) includes an inclination mechanism (8) configured to incline a retaining ring (4A) in a pipe axis direction (X) with respect to a reference plane (P) orthogonal to a central axis (C) of a retaining ring body (40), such that one of a circumferential center portion (40y) and a circumferential end portion (40x) of a retaining ring body (40A) is caused to be closer to a fitting body (2) and the other is moved away from the fitting body (2), when first protruding portions (41) and first facing portions (55) come into contact with each other and a pipe pulling force which stretches a joint pipe (100) is applied to the joint pipe (100).

There is described a pipe connector for connecting first and second pipes slidably engageable one into the other, the pipe connector comprising: a side wall extending between a first end and a second end along a longitudinal axis and defining an interior space, the side wall being adapted to be inserted into a floor hole made into a floor; a floor flange extending laterally and outwardly from the first end of the side wall, the floor flange being adapted to rest on a floor surface when the side wall is inserted into the floor hole; and a guiding assembly secured to the side wall and comprising at least one resilient retaining finger for receiving the first pipe therebetween, the at least one resilient retaining finger being securable to the first pipe when the second pipe is engaged into the first pipe.

A tubular structure includes at least one exterior tube and at least one interior tube, at least a portion of the interior tube is disposed within the exterior tube. The tubular structure further includes at least one expansion joint provided between the exterior tube and the interior tube and the expansion joint allows lateral expansion or contraction of the exterior tube and the interior tube and maintains a pressure within the exterior and the interior tubes.

A tubular structure includes at least one exterior tube and at least one interior tube, at least a portion of the interior tube is disposed within the exterior tube. The tubular structure further includes at least one expansion joint provided between the exterior tube and the interior tube and the expansion joint allows lateral expansion or contraction of the exterior tube and the interior tube and maintains a pressure within the exterior and the interior tubes.

A telescoping fluid coupling (10,110) is provided for use with a fluid flow device (12) and includes a coupling body (14,114) having a fluid port (16,116) extending along a longitudinal axis (18,118). A retainer (20,120) is fixed to the body (14,114) and includes a retaining shoulder (26,126). A flange (22,122) is mounted to the fluid port (16,116) and includes a radially inwardly facing guide surface (36,136) that surrounds a mount surface (24,124) and extends longitudinally along the axis (18,118) to provide guided, sliding translation of the guide surface (36,136) relative to the mount surface (24,124) along the axis (18,118). The flange (22,122) further includes a stop shoulder (38,138) to engage the retaining shoulder (26,126) to limit the translation of the flange (22,122) along the axis (18,128).

A fracturing system is provided. In one embodiment, the fracturing system includes a fracturing manifold for routing fracturing fluid to multiple wells. The fracturing manifold can be coupled via fluid conduits to fracturing trees installed at the wells. In some cases, each fracturing tree that is coupled to the fracturing manifold is coupled by at least one rigid fluid conduit. The fracturing manifold can include a trunk line that provides fracturing fluid to multiple outlet branches, which can include valves for controlling flow of fracturing fluid to wells downstream of the valves. Additional systems, devices, and methods are also disclosed.

An apparatus (1) for supporting an explosive device (13) including a base member (3), one or more support members (11) and a fluid aperture (19). The base member (3) includes a base member aperture (5) to provide a passage (7) to a base chamber (9) of the base member (3). The one or more support members (11) are telescopically receivable through the base member aperture (5) and into the base chamber (9), wherein the one or more support members (11) support the explosive device (13). The fluid aperture (19) allows pressurised fluid into the base chamber (9) to force the one or more support members (11) towards an extended configuration (23) such that at least part of the one or more support members (11) are telescopically extended out of the base chamber (9).

Disclosed is a robot cleaner comprising: a cleaner main body to which a dust collecting device is mounted; a cleaning module which is configured to be movable relative to the cleaner main body and performs the function of cleaning a floor; a connection unit which is connected to each of the cleaner main body and the cleaning module and is configured to have a variable length; and a driving unit configured to change the length of the connection unit.

Disclosed is a robot cleaner comprising: a cleaner main body to which a dust collecting device is mounted; a cleaning module which is configured to be movable relative to the cleaner main body and performs the function of cleaning a floor; a connection unit which is connected to each of the cleaner main body and the cleaning module and is configured to have a variable length; and a driving unit configured to change the length of the connection unit.

Provided is a pipe detachment preventing device, for a union nut pipe fitting, which can omit an inner core and which can prevent detachment of a pipe from a pipe fitting even when a large pulling force which stretches the pipe acts. Connection holding means (7) includes an inclination mechanism (8) configured to incline a retaining ring (4A) in a pipe axis direction (X) with respect to a reference plane (P) orthogonal to a central axis (C) of a retaining ring body (40), such that one of a circumferential center portion (40y) and a circumferential end portion (40x) of a retaining ring body (40A) is caused to be closer to a fitting body (2) and the other is moved away from the fitting body (2), when first protruding portions (41) and first facing portions (55) come into contact with each other and a pipe pulling force which stretches a joint pipe (100) is applied to the joint pipe (100).