The present disclosure discloses a valve with dual ball valves, including two ball valves arranged side by side and clamped with each other, wherein each ball valve includes a valve body, a ball body, a valve rod and a handle, clamping structures are respectively and correspondingly arranged on one surfaces of the two valve bodies abutting against each other, and each ball valve further includes a limiting seat, a first anti-misoperation device and a second anti-misoperation device. The first anti-misoperation devices ensure that the handles can be rotated freely only when the two ball valves are in a clamped state. The second anti-misoperation devices ensure that the handles can only be rotated when external force is applied to the handles. Misoperation on the valve is prevented through triple protection.

The first connector includes a main body, a first connecting surface, a rotating ring, and a restricting pin for prohibiting the rotation of the rotating ring relative to the first connecting surface, the rotating ring, when taking a predetermined rotational phase with respect to the second connector, the second connector to the abutting position, can be drawn in the axial direction, further, the second connector is engaged with a portion of the second connector by rotating relative to the first connecting surface in a state of being retracted to the abutting position to maintain a connection state, the restricting pin, when the second connector is retracted to the abutting position, the rotation of the rotating ring from the restricting position to allow the rotation of the allowable position.

The first connector includes a main body, a first connecting surface, a rotating ring, and a restricting pin for prohibiting the rotation of the rotating ring relative to the first connecting surface, the rotating ring, when taking a predetermined rotational phase with respect to the second connector, the second connector to the abutting position, can be drawn in the axial direction, further, the second connector is engaged with a portion of the second connector by rotating relative to the first connecting surface in a state of being retracted to the abutting position to maintain a connection state, the restricting pin, when the second connector is retracted to the abutting position, the rotation of the rotating ring from the restricting position to allow the rotation of the allowable position.

A pipe joint includes a first tubular body inserted into a second tubular body to be detachably connected to each other. The joint includes: a first valve including a first valve body that opens and closes a flow path in the first tubular body and a first rotating lever provided outside of the first tubular body and connected to and rotates the first valve body; a second valve configured to open and close a flow path in the second tubular body; and a sleeve movably provided on an outer peripheral surface of the second tubular body and configured to move toward the first tubular body to connect the tubular bodies to each other in an inserted state. The first rotating lever restricts the sleeve from moving when the flow path in the first tubular body is open, and the sleeve is allowed to move the flow path is closed.

A pipe joint includes a first tubular body inserted into a second tubular body to be detachably connected to each other. The joint includes: a first valve including a first valve body that opens and closes a flow path in the first tubular body and a first rotating lever provided outside of the first tubular body and connected to and rotates the first valve body; a second valve configured to open and close a flow path in the second tubular body; and a sleeve movably provided on an outer peripheral surface of the second tubular body and configured to move toward the first tubular body to connect the tubular bodies to each other in an inserted state. The first rotating lever restricts the sleeve from moving when the flow path in the first tubular body is open, and the sleeve is allowed to move the flow path is closed.

A high-pressure gas filling and unloading system has a high-pressure gas pipeline for connecting to a gas filling station, a displacement gas pipeline for gas displacement, a plurality of double-channel rotating joints provided in said high-pressure gas pipeline and configured to be rotatable under pressure, and a filling and unloading joint provided at a free end of said high-pressure gas pipeline and comprising a control mechanism. The filling and unloading joint is configured to form a displacement working channel or a filling and unloading working channel therein through the control mechanism. The control mechanism is configured to alternately open the displacement working channel and the filling and unloading working channel, so that the displacement working channel is in communication with the displacement gas pipeline for gas displacement, or the filling and unloading working channel is in communication with the high-pressure gas pipeline for filling and unloading of high-pressure gas.

Fluid coupling devices can be configured for use in fluid systems for purposes of providing a single-use, aseptic disconnection functionality that can substantially limit fluid spillage when being disconnected. In some embodiments, the coupling portions cannot be functionally reconnected to each other after being disconnected from each other. The coupling portions can be identical to each other in some embodiments. A retainer component of the fluid coupling devices can be removably engaged with the coupling portions while the coupling portions are abutted against each other in an operative arrangement.

A fluid connector includes a second pin accommodated in a first pin. Prior to mating of the fluid connector and a complementary connector, a front end of the first pin protrudes forward out of the pin hole, the second pin is located within the pin hole, and a front end of the second pin is accommodated in the accommodating slot. When the fluid connector is mated with the complementary connector, the complementary connector abuts against the first pin, such that the first pin moves backward within the pin hole, and the front end of the second pin moves forward until it is accommodated in the complementary connector. The first pin and the second pin share the same pin hole, and the second pin occupies at least a portion of the inner space of the first pin, thereby facilitating saving the space of the shell.

A fluid connector includes a second pin accommodated in a first pin. Prior to mating of the fluid connector and a complementary connector, a front end of the first pin protrudes forward out of the pin hole, the second pin is located within the pin hole, and a front end of the second pin is accommodated in the accommodating slot. When the fluid connector is mated with the complementary connector, the complementary connector abuts against the first pin, such that the first pin moves backward within the pin hole, and the front end of the second pin moves forward until it is accommodated in the complementary connector. The first pin and the second pin share the same pin hole, and the second pin occupies at least a portion of the inner space of the first pin, thereby facilitating saving the space of the shell.

A fluid connector includes a shell having a fluid channel, a ball valve accommodated in the shell and having a through hole, a control element arranged outside the shell for controlling the ball valve to rotate, and a pin member. A front end of the shell for engaging a matching connector has an engagement hole. The control element controls the ball valve between a closed position and an open position. The through hole is in fluid communication with the fluid channel when the ball valve is at the open position. A front face of the shell has an accommodating hole for accommodating the pin member. A resilient member is arranged in the accommodating hole for supporting the pin member. The pin member is adapted to be guided by a guide structure and compress the resilient member to separate from the engagement hole of the matching connector.