Horizontal Pneumatic Sand Conveying Device for Rail Sanding
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Solution Overview
Problem
Existing sanding systems on rail vehicles face challenges in achieving a compact design for the sand conveying device, which affects the size of the sand storage container and the distance between the sand inlet and outlet, impacting the efficiency and reliability of sand application.
Innovation Solution
A horizontally arranged pneumatic sand conveying device with a hurdle device, mixing device, and outlet device, integrated within a common housing, minimizing the height difference between the sand inlet and outlet, and incorporating features like labyrinth units and Laval nozzles to enhance sand flow and prevent leakage.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the sand conveying device is arranged vertically, then the height difference between sand inlet and outlet is larger, but the device complexity is reduced
Solution Approach 1:
The patent transitions from a vertical arrangement to a horizontal arrangement of the sand conveying device components. The hurdle device, mixing device, and outlet device are positioned sequentially along the horizontal plane rather than stacked vertically, thereby reducing the height difference between sand inlet and outlet while maintaining functional complexity
2Volume of stationary object
If the distance between sand inlet and outlet is reduced, then the sand storage container volume can be increased, but the device layout becomes more constrained
Solution Approach 1:
By arranging the hurdle device, mixing device, and outlet device in a horizontal sequence rather than vertically stacked, the patent reduces the vertical space required, allowing the sand storage container to be positioned optimally and maximizing its volume while maintaining functional separation between components
3Length of stationary object
If the sand conveying device is made compact, then the height difference is minimized, but the sand flow reliability may be compromised
Solution Approach 1:
The patent introduces a mixing device that uses compressed air to convey sand horizontally through the compact device. This pneumatic conveying mechanism ensures reliable sand flow through the compact horizontal arrangement by providing sufficient conveying force to move sand through the reduced distance between inlet and outlet
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The compact design allows for a larger sand storage container and optimal sand application, ensuring efficient sand distribution with minimal height difference and preventing clogging, while maintaining a compact form factor.
Implementation Method 1
the mixing device (110) for receiving and conveying sand from the hurdle device (105) by means of compressed air
Implementation Method 2
In the mixing device, the sand can mix with the air from the nozzle and be accelerated toward the sand outlet
Data Source
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AI summary
A pneumatic sand conveying device (100) for a sanding system (500) of a rail vehicle comprises an obstacle device (105) which is fluidically coupled to a sand input (200) for receiving sand from a sand storage container (505), the obstacle device (105) being shaped to form an obstacle between the sand input (200) and a mixing device (110) fluidically coupled to the obstacle device (105). In addition, the sand conveying device (100) has the mixing device (110) for receiving and forwarding sand from the obstacle device (105) by means of compressed air and a discharge device (115) fluidically coupled to the mixing device (110) to dispense the sand from the sand conveying device (100) through a sand outlet (203). The obstacle device (105), the mixing device (110) and the discharge device (115) are arranged in a horizontal plane when the sand conveying device (100) is in a state (140) ready for operation.