A method for controlling a position of a floor of a carriage of a railway vehicle moving on rails, relative to a platform. The carriage includes a body including the floor, at least one bogie, and at least one suspension interposed between the body and the bogie. The method includes determining a level difference between the actual position of the carriage relative to the platform and an expected position of the carriage relative to the platform, adjusting a height of the suspension for compensating the determined level difference. Determining the level difference includes capturing an image of at least one predetermined pattern comprised on the platform with a camera borne by the body, comparing the captured image with a memorized reference image of the at least one pattern of the platform, and calculating a vertical displacement from the images to determine the level difference.

A bogie for a high-speed railway vehicle includes a wheel set, an axle box, a primary spring suspension device, a frame, a secondary spring suspension device and a foundation braking device. A wheel of the wheel set has an LMA wheel tread. The foundation braking device is mounted by a three-point hitch structure. The axle box is a structure which is separatable in a vertical direction, and an off-line safety protecting device is mounted at a lower portion of the axle box. A traction rod of the secondary spring suspension device is a single traction rod. A center pin is provided with an integral hoisting device. Two anti-yaw dampers, as a group, are arranged at either side of the secondary spring suspension device, and the two anti-yaw dampers have the same damping coefficient.

A bogie for a high-speed railway vehicle includes a wheel set, an axle box, a primary spring suspension device, a frame, a secondary spring suspension device and a foundation braking device. A wheel of the wheel set has an LMA wheel tread. The foundation braking device is mounted by a three-point hitch structure. The axle box is a structure which is separatable in a vertical direction, and an off-line safety protecting device is mounted at a lower portion of the axle box. A traction rod of the secondary spring suspension device is a single traction rod. A center pin is provided with an integral hoisting device. Two anti-yaw dampers, as a group, are arranged at either side of the secondary spring suspension device, and the two anti-yaw dampers have the same damping coefficient.

A railcar includes: a carbody; a bogie constituting member including an interface plate provided at a lower portion of the carbody, an air spring, and a bogie; an automatic level controlling valve configured to maintain a height of the spring within a certain range; a first attaching portion provided on a side surface of the plate, the valve being detachably attached to the side surface of the plate by the first attaching portion; and attaching means provided at the lower portion of the carbody, the valve being detachably attached to the lower portion of the carbody by the attaching means, the bogie constituting member being separable from the carbody in a state where the valve is attached to the side surface of the plate through the first attaching portion or a state where the valve is attached to the lower portion of the carbody through the attaching means.

A railcar includes: a carbody; a bogie constituting member including an interface plate provided at a lower portion of the carbody, an air spring, and a bogie; an automatic level controlling valve configured to maintain a height of the spring within a certain range; a first attaching portion provided on a side surface of the plate, the valve being detachably attached to the side surface of the plate by the first attaching portion; and attaching means provided at the lower portion of the carbody, the valve being detachably attached to the lower portion of the carbody by the attaching means, the bogie constituting member being separable from the carbody in a state where the valve is attached to the side surface of the plate through the first attaching portion or a state where the valve is attached to the lower portion of the carbody through the attaching means.

A concrete coating composition, containing a thermally stable cement, glass bubbles, porous glass spheres or aerogel or a combination thereof, and glass fibers. Also, disclosed is a coated pipe having the concrete coating composition disclosed herein. The coated pipes disclosed herein can be thermally insulated, impact and abrasion resistant, flexible pipeline that can be used in downhole steam injection operations and for extracting hydrocarbons.

A concrete coating composition, containing a thermally stable cement, glass bubbles, porous glass spheres or aerogel or a combination thereof, and glass fibers. Also, disclosed is a coated pipe having the concrete coating composition disclosed herein. The coated pipes disclosed herein can be thermally insulated, impact and abrasion resistant, flexible pipeline that can be used in downhole steam injection operations and for extracting hydrocarbons.

Provided are an auxiliary spring, a new-belted diaphragm and an air spring. The air spring comprises an auxiliary spring and a new-belted diaphragm arranged above the auxiliary spring, the auxiliary spring comprises a rim (1), which has a reversed convex structure and has a downward support column on a bottom surface thereof; a rubber piece (2), a center of which has a concave hole for enclosing the whole support column and a top of which contacts with a concave bottom surface of the rim (1); and a base plate (3); the new-belted diaphragm comprises a top cover (41) and a diaphragm body (42) that has a hollow structure and is installed below the top cover (41); a top of the diaphragm body (42) is an annular opening and is connected with the top cover (41), and a middle vertical portion thereof is a girdle portion.

Provided are an auxiliary spring, a new-belted diaphragm and an air spring. The air spring comprises an auxiliary spring and a new-belted diaphragm arranged above the auxiliary spring, the auxiliary spring comprises a rim (1), which has a reversed convex structure and has a downward support column on a bottom surface thereof; a rubber piece (2), a center of which has a concave hole for enclosing the whole support column and a top of which contacts with a concave bottom surface of the rim (1); and a base plate (3); the new-belted diaphragm comprises a top cover (41) and a diaphragm body (42) that has a hollow structure and is installed below the top cover (41); a top of the diaphragm body (42) is an annular opening and is connected with the top cover (41), and a middle vertical portion thereof is a girdle portion.

A bellows-type air spring, more particularly a folding-bellows-type air spring having two or more bellows sections designed as folds or toroidal parts, which are separated by rings placed around the air spring bellows, more particularly metal rings, wherein the bellows-type air spring is secured between the sprung and the unsprung mass with the aid of connecting parts, more particularly designed as an air spring cap and an air spring rim or piston, and wherein the bellows project outward in the manner of a balloon between the connecting parts, or the folds or toroidal parts of the bellows project outward in the manner of a balloon between or adjacent to the rings.