A pipe connecting seat has a sleeve and two positioning members. The positioning members are disposed on the sleeve at a spaced interval. Each one of the two positioning members has a positioning arm and a positioning pin. The positioning arm is openably, positionably, and pivotally disposed on the sleeve, and has at least one reinforcing protrusion for increasing strength of the positioning arm. The positioning pin is disposed on the positioning arm and is located out of the positioning arm for positioning the positioning arm and limiting a pivoting opening range of the positioning arm. When the pipe connecting seat is connected to two pipes, the two positioning members are always located on the sleeve and are not prone to loss. The operating convenience of the pipe connecting seat is increased.

An electrolysis facility having a sealed coupling between at least two pipes may be mountable on one another. The sealed coupling may be formed on at least one overlapping pipe pair by lateral surfaces abutting one another. The pipes may be mounted/mountable one inside the other in a floating manner relative to one another in an axial direction. A deformation point may be formed at a circumferential position having an axial length on a free end of the outer pipe in the overlap region. The deformation point may define a region for deformation of the outer pipe. A lateral surface of an inner lateral surface of the outer pipe and an outer lateral surface of the inner pipe may define a sealing surface that overlaps the deformation point in the axial direction. In addition to high operational reliability, this also enables a simplification of the installation procedure.

An electrolysis facility having a sealed coupling between at least two pipes may be mountable on one another. The sealed coupling may be formed on at least one overlapping pipe pair by lateral surfaces abutting one another. The pipes may be mounted/mountable one inside the other in a floating manner relative to one another in an axial direction. A deformation point may be formed at a circumferential position having an axial length on a free end of the outer pipe in the overlap region. The deformation point may define a region for deformation of the outer pipe. A lateral surface of an inner lateral surface of the outer pipe and an outer lateral surface of the inner pipe may define a sealing surface that overlaps the deformation point in the axial direction. In addition to high operational reliability, this also enables a simplification of the installation procedure.

A hose connector repairing device includes two hose members, a vehicle part having two connecting segments, two hose connector repairing element each having one section and having a chamber for engaging with the connecting segment of the vehicle part, and the hose connector repairing elements each include another section for engaging with the hose members, and a tubular member is engaged into the other section of the hose connector repairing element for reinforcing the other section of the hose connector repairing elements and for allowing the hose connector repairing elements to be solidly and stably secured in the hose members and for preventing the hose connector repairing elements and the hose members from being squeezed and collapsed.

A hose connector repairing device includes two hose members, a vehicle part having two connecting segments, two hose connector repairing element each having one section and having a chamber for engaging with the connecting segment of the vehicle part, and the hose connector repairing elements each include another section for engaging with the hose members, and a tubular member is engaged into the other section of the hose connector repairing element for reinforcing the other section of the hose connector repairing elements and for allowing the hose connector repairing elements to be solidly and stably secured in the hose members and for preventing the hose connector repairing elements and the hose members from being squeezed and collapsed.

A connector system (1) for coupling one fluid conduit to another fluid conduit comprises a first connector element (2) having a mating surface extending around an insertion axis of the connector element. The mating surface incorporates first and second resilient peripheral seals (7, 9) extending around the mating surface, the first and second peripheral seals (7, 9) having different diameters and being separated along the insertion axis. The first connector element (2) bearing the peripheral seals (7, 9) can be the female connector (2), such as shown, or can be the male connector (3).

A connector system (1) for coupling one fluid conduit to another fluid conduit comprises a first connector element (2) having a mating surface extending around an insertion axis of the connector element. The mating surface incorporates first and second resilient peripheral seals (7, 9) extending around the mating surface, the first and second peripheral seals (7, 9) having different diameters and being separated along the insertion axis. The first connector element (2) bearing the peripheral seals (7, 9) can be the female connector (2), such as shown, or can be the male connector (3).

A pipe connecting structure for joining a first pipe having a limiting groove includes a second pipe and a limiting member. The second pipe is provided with a second connecting portion. The second connecting portion is provided with a receiving hole for receiving the first pipe. The limiting member is sleeved on the second connecting portion and is provided with a limiting protrusion. The limiting protrusion is inserted through the second connecting portion to be connected to the first pipe. The pipe connecting structure has a simple structure, is convenient for disassembly and assembly, reduces the production cost and improves the assembly efficiency.

A pipe connecting structure for joining a first pipe having a limiting groove includes a second pipe and a limiting member. The second pipe is provided with a second connecting portion. The second connecting portion is provided with a receiving hole for receiving the first pipe. The limiting member is sleeved on the second connecting portion and is provided with a limiting protrusion. The limiting protrusion is inserted through the second connecting portion to be connected to the first pipe. The pipe connecting structure has a simple structure, is convenient for disassembly and assembly, reduces the production cost and improves the assembly efficiency.

A tube end form, including a first section including a first radially outward facing surface, a second section including a second radially outward facing surface, and a shoulder axially arranged between the first and second sections, the shoulder including a first frusto-conical surface arranged at a first angle relative to the first radially outward facing surface, and a second frusto-conical surface arranged at a second angle relative to the first radially outward facing surface.