A pneumatic sand conveying device for a sanding system of a rail vehicle includes an obstacle device which is fluidically coupled to a sand input for receiving sand from a sand storage container, the obstacle device being shaped to form an obstacle between the sand input and a mixing device fluidically coupled to the obstacle device. In addition, the sand conveying device has the mixing device for receiving and forwarding sand from the obstacle device by compressed air and a discharge device fluidically coupled to the mixing device to dispense the sand from the sand conveying device through a sand outlet. The obstacle device, the mixing device and the discharge device are arranged in a horizontal plane when the sand conveying device is in a state ready for operation.

A sand stairway for a sand-spreading system of a rail vehicle has a stairway housing with a sand compartment for providing sliding spreading sand. A blow-out duct discharges spreading sand from the stairway housing. First and second nozzle inserts are releasably inserted into first and second receiving holes of a nozzle flange of the stairway housing above the sand compartment. The nozzle inserts are produced separately from the stairway housing. The first nozzle insert produces an air jet directed into the sand compartment and swirls up spreading sand. The second nozzle insert produces an air jet directed into the blow-out duct and swirls up spreading sand. A sand-spreading system for a rail vehicle has a sand stairway for the compressed-air-controlled metering of the discharged spreading sand. The novel sand stairway has increased flexibility and can be set up without great effort for using different types of spreading sand.

A metering device is configured for fitting into a sand-spreading system of a rail vehicle. The metering device has a housing block, in which a sand path extends from a sand-feeding funnel into a vertical sand blow-out channel via a sand-mixing channel, which rises at an inclination from a sand-holding space to a sand deflection space. A pushing air tube is provided for producing an air flow that conveys spreading sand. The pushing air tube protrudes into the sand-mixing channel coaxially from the bottom. A nozzle insert is detachable inserted into an inflow channel, which leads into the sand deflection space from above. The nozzle insert is provided for producing an air jet directed downward into the sand blow-out channel. The amount of scattering sand that is discharged can be metered more precisely and the susceptibility of the metering device to wear is improved.

A method for controlling a device for metering granular material and a metering device for metering granular material comprises a feed for the granular material from a container into a metering chamber. A metering piston can be actuated by a control device such that a gap between the feed and the metering chamber is opened by a predefined first distance and a second distance which is greater than the first distance. At least one sensor is arranged in a delivery line leading away from the metering chamber and is connected to the control device so that the metering piston can be actuated for a predefined duration such that the gap between the feed for the granular material and the metering chamber can be opened by the second distance if a blockage of the granular material is detected by the at least one sensor, so that the blockage is dispersed.

A device for spreading granulate, particularly for spreading sand into the gap between a rail and a wheel of a rail vehicle, includes a housing, at least one inlet for the granulate and at least one outlet for the granulate, an axially movable metering piston and a compressed air connection, which leads into a pressure chamber and serves for actuating the metering piston by compressed air to meter the granulate. At least one bore is provided in the metering piston. To create a device which is of particularly simple and compact construction, a conveying air chamber separated from the pressure chamber and has a compressed air connection is provided, and at least one bore in the metering piston connects the conveying air chamber to the at least one outlet for the granulate, such that granulate can be conveyed to the at least one outlet by compressed air independently of the metering process.

A metering device is configured for fitting into a sand-spreading system of a rail vehicle. The metering device has a housing block, in which a sand path extends from a sand-feeding funnel into a vertical sand blow-out channel via a sand-mixing channel, which rises at an inclination from a sand-holding space to a sand deflection space. A pushing air tube is provided for producing an air flow that conveys spreading sand. The pushing air tube protrudes into the sand-mixing channel coaxially from the bottom. A nozzle insert is detachable inserted into an inflow channel, which leads into the sand deflection space from above. The nozzle insert is provided for producing an air jet directed downward into the sand blow-out channel. The amount of scattering sand that is discharged can be metered more precisely and the susceptibility of the metering device to wear is improved.

A locomotive sanding system is described for conveying sand from a sand tower to a sand box mounted on a locomotive. The invention is designed to prevent personnel from being subjected to sand and sand dust during the sand box being filled with sand from the sand tower. The system includes a universal sealing nozzle which may be used with the locomotive sanding system or other devices. The universal sealing nozzle includes an expansion seal extending therearound which may be moved from a retracted position to an expanded position. When the nozzle is inserted into the fill pipe of the sand box, the expansion seal is expanded to sealably engage the inside surface of the fill pipe.

A locomotive sanding system is described for conveying sand from a sand tower to a sand box mounted on a locomotive. The invention is designed to prevent personnel from being subjected to sand and sand dust during the sand box being filled with sand from the sand tower. The system includes a universal sealing nozzle which may be used with the locomotive sanding system or other devices. The universal sealing nozzle includes an expansion seal extending therearound which may be moved from a retracted position to an expanded position. When the nozzle is inserted into the fill pipe of the sand box, the expansion seal is expanded to sealably engage the inside surface of the fill pipe.

An adjustment device for a track conditioning unit has a measuring unit for determining a lateral offset of a rail, travelled on by a rail vehicle, relative to an effective range of a track conditioning unit or a measuring unit for determining the relative position of a bogie with respect to the rail car body. The adjustment device contains a determining unit for determining an actuation command for an actuation unit in accordance with the determined lateral offset between the effective range of the track conditioning unit and the rail. Part of the adjustment device for the track conditioning unit is also an actuation unit for actuating an actuator unit of the track-conditioning unit with an adjustment command which is generated on the basis of the actuation command. The actuator unit adjusts an effective range of the track conditioning unit on the basis of the adjustment command.

An adjustment device for a track conditioning unit has a measuring unit for determining a lateral offset of a rail, travelled on by a rail vehicle, relative to an effective range of a track conditioning unit or a measuring unit for determining the relative position of a bogie with respect to the rail car body. The adjustment device contains a determining unit for determining an actuation command for an actuation unit in accordance with the determined lateral offset between the effective range of the track conditioning unit and the rail. Part of the adjustment device for the track conditioning unit is also an actuation unit for actuating an actuator unit of the track-conditioning unit with an adjustment command which is generated on the basis of the actuation command. The actuator unit adjusts an effective range of the track conditioning unit on the basis of the adjustment command.