Pneumatic sand conveying device for a sanding system of a rail vehicle, sanding system, and method for operating a pneumatic sand conveying device

A pneumatic sand conveying device for a sanding system of a rail vehicle, wherein the sand conveying device comprises:

• an obstacle device fluidically coupled to a sand inlet for receiving sand from a sand storage container, wherein the obstacle device is configured to form an obstacle between the sand inlet and a mixing device fluidically coupled to the obstacle device;
• a mixing device for receiving and forwarding sand from the obstacle device by compressed air the obstacle device preventing the sand from entering the mixing device independent of the compressed air;
• and
• an outlet device, fluidically coupled to the mixing device, for dispensing the sand from the sand conveying device through a sand outlet, wherein the obstacle device, the mixing device and the outlet device are arranged in a horizontal plane when the sand conveying device is in a state of readiness for operation.