A rotating body nozzle type reverser

Abstract

The invention provides a rotating body nozzle type reverser comprising a reverser body and a reversing rotating body which is arranged in the reverser body and can rotate relative to the reverser body. The reverser body is cylindrical in shape with one end being open; the reversing rotating body is also cylindrical in shape and coaxial with the reverser body; the inner surface of the reverser bodyand the outer surface of the reversing rotating body are in liquid seal fit; the end, extending into the reverser body, of the reversing rotating body is a seal and the end, away from the reverser body, is a liquid inflow opening; the wall surface of the reverser body is provided with a nozzle and is also provided with a first outflow opening and a second outflow opening; during rotation of the reversing rotating body, the nozzle switches between the first outflow opening and the second outflow opening. The reverser has the advantages that closed rotating body reversing plays a key role in preventing steam dispersion in hot water metering, pressure fluctuation generated during maximum flow reversing is small, the reversing time is short and the metering is accurate.

Description

technical field [0001] The invention relates to the technical field of flow standard devices, in particular to a commutator in the flow standard device. Background technique [0002] The purpose of the water flow standard device is to test the accuracy of the flow meter, and the commutator is a key part of the water flow standard device, and its quality directly affects the measurement accuracy of the flow. At present, there are mainly two types of open commutator and closed commutator used in the water flow standard device. [0003] The open commutator switches the flow direction of the liquid mostly by the back and forth movement of the device called "pants fork" to realize the reversing of the fluid. To achieve the purpose of fluid reversing, because the "trouser fork" is relatively large, the required thrust is just to hit, so it is not easy to achieve a fast push, so the time interval between the "trouser fork" moving forward and backward is large, which will bring a g...

AI Technical Summary

Problems solved by technology

However, in this way, in the process of changing the angle of the rotor, the direction of connection between the connecting channel and the liquid inlet and liquid outlet is changed, so as to realize the reversing of the liquid, which is equivalent to using the rotor to twist the flow direction of the liquid in the connecting channel. , the change of the liquid outflow direction will produce resistance to the rotor rotation process, and then generate a large torque. In actual use, the rotation of the rotor often has the problem of being stuck and vulnerable

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