摘要:
A manhole assembly (10; 10') comprises a frame (11; 11') and at least a pair of cover plates (12, 13; 12', 13') that are receivable in and disengageable from -the frame to permit selective closing and opening of an aperture the periphery of which is defined by the frame, the cover plates (12, 13; 12', 13') substantially occupying the aperture when received in the frame; a first cover plate (12; 12') of a said pair being smaller than a second cover plate (13; 13') of the pair; the first cover plate being hingeable relative to the second cover plate, while the latter is received in the frame (11', 11'), from a closed position received in the frame to an open position in which a first part of the aperture is open; and the second cover plate being removable from the frame, when the first cover plate is disengaged from the frame, to open a second part of the aperture.
摘要:
The inventive composite gland sealing for the interlocking coupling of a housing end piece (8) comprising an anchoring groove (82), a plastic ring (14) and several locking inserts (20). Each locking insert (20) comprises a radially external head (30) provided with a first front projection (50, 52) applicable against the annular front surface (90) of the anchoring groove (82). The head (30) comprises a second frontal projection (52, 50) radially shifted from the first front projection (50, 52). Said invention is used for cast-iron pipe joint.
摘要:
Ce regard de chaussée comprend un cadre (4) délimitant une ouverture (6) et muni d'une collerette interne (8) s'étendant radialement vers l'intérieur, un tampon (10) comprenant un voile d'obturation (12) et une jupe cylindrique (14) complémentaire de la collerette interne (8), le voile d'obturation et la jupe définissant un coin concave (16), et un joint principal (18) disposé sur la collerette interne (8) et interposé à l'état fermé entre le tampon (10) et le cadre (4). Le regard de chaussée (2) comprend un joint auxiliaire (20) qui est en contact, au moins à l'état fermé, avec le coin concave (16).
摘要:
The method for covering an object to be coated (40) with a meltable covering comprises the following steps: establishment of a flame (44), the direction of the flame (F) thereof being oriented towards the object to be coated and introduction of an amount of meltable covering material into the flame. The temperature of the flame is sufficiently high in order to result in the at least partial melting of the meltable material. The speed of the flame is chosen in such a way that the meltable covering material thus melted is projected onto the object to be coated. At least one part of the amount of meltable coating material is in a melted stated when it impacts upon the object to be coated. The amount of meltable covering material includes powder. The invention can be used for coating cast iron pipes. .
摘要:
The invention relates to a stop wedge for a stop valve, which is designed to be moved in translation along a displacement axis (T-T). The wedge consists of a sealing panel comprising a distal end (60) which is intended to be applied against a sealing seat (22) and two lateral guide elements (82, 84). The stop wedge (6) also comprises a stopping surface (A) which comes into contact with the pressurised liquid and which is projected onto the displacement plane (C-C) when the stop wedge (6) is in the closed position. The distal ends (98, 100) of the aforementioned guide elements (82, 84) are separated from the distal end (60) of the stop wedge (6) by a distance dp which is measured along the displacement axis (T-T). The stopping surface (A) has a height H along the displacement axis (T-T), while the dp/H ratio is less than 0.34.
摘要:
The method for covering an object to be coated (40) with a meltable covering comprises the following steps: establishment of a flame (44), the direction of the flame (F) thereof being oriented towards the object to be coated and introduction of an amount of meltable covering material into the flame. The temperature of the flame is sufficiently high in order to result in the at least partial melting of the meltable material. The speed of the flame is chosen in such a way that the meltable covering material thus melted is projected onto the object to be coated. At least one part of the amount of meltable coating material is in a melted stated when it impacts upon the object to be coated. The amount of meltable covering material includes powder. The invention can be used for coating cast iron pipes. .
摘要:
The invention relates to a stop wedge for a stop valve, which is designed to be moved in translation along a displacement axis (T-T). The wedge consists of a sealing panel comprising a distal end (60) which is intended to be applied against a sealing seat (22) and two lateral guide elements (82, 84). The stop wedge (6) also comprises a stopping surface (A) which comes into contact with the pressurised liquid and which is projected onto the displacement plane (C-C) when the stop wedge (6) is in the closed position. The distal ends (98, 100) of the aforementioned guide elements (82, 84) are separated from the distal end (60) of the stop wedge (6) by a distance dp which is measured along the displacement axis (T-T). The stopping surface (A) has a height H along the displacement axis (T-T), while the dp/H ratio is less than 0.34.