[New patent introduction] A full jacket type vortex flowmeter

Today, I will introduce a national invention authorized patent-a full jacket type vortex flowmeter. The patent was applied for by Jiangsu Weiyi Electronics Co., Ltd., and the authorization was announced on May 31, 2017.

Content description

The invention relates to the field of vortex flowmeters.

Background of the invention

In the chemical and petrochemical fields, there are many fluids that are prone to phase change during use, such as gaseous sulfur in acid gas, urea in urea solution, caprolactam and other fluids. In the process of fluid transportation, due to the continuous drop in temperature, it is easy to change in the middle. The components undergoing phase change appear to condense or crystallize, change from gas to liquid, or from liquid to solid, or even directly from gas to solid, and condense on the liquid surface of the flowmeter, destroying the topological shape of the liquid contact part of the vortex flowmeter. As a result, the vortex flowmeter cannot generate a normal Karman vortex street, resulting in measurement failure.

Traditional jacket structure: Only the outer jacket is used to heat only the outer surface of the flow pipe. Due to the poor heat transfer of stainless steel, the heat transferred to the vortex generator through the jacket is insufficient. In addition, the vortex generator is in the area with the highest flow rate, and the fluid has a strong heat dissipation effect on it, resulting in a higher temperature on the inner surface of the circulation pipe. The body temperature is low, and in extreme cases, a temperature difference of up to 300 degrees may occur. Even if the inner wall of the pipeline is not adhered, condensation or crystallization on the surface of the vortex generator cannot be avoided, which also results in the failure of the Karman vortex street, which ultimately leads to measurement failure.

Summary of the invention

In view of the shortcomings of the prior art, the present invention provides a method for directly injecting steam into the generator body in addition to the pipe interlayer, and installs a flow distribution valve at the outer end, and adjusts the opening of the flow distribution valve according to the actual situation of the site. The flow rate ratio of the heating medium flowing through the jacket and the generator body makes the temperature of the inner wall and the generator body equal, and the contact temperature of all parts is much higher than the condensation temperature or crystallization temperature of the medium, which prevents the occurrence of condensation/crystallization of the full-jacketed vortex Street flow meter.

In order to achieve the objective of the present invention, the following technical solutions are provided: a full-jacketed vortex flowmeter, including a fluid pipeline, a vortex generator in the fluid pipeline, a sensor on the back side of the vortex generator, and a side wall of the fluid pipeline The sensor housing, the sensor housing connected with the polished rod, and the meter head connected with the polished rod, are characterized in that the fluid pipe jacket is provided with a jacket, the gap between the jacket and the outer wall of the fluid pipe constitutes a heating channel, and the jacket and the fluid pipe are provided There are partitions to divide the heating channel into two upper and lower chambers. The center of the vortex generator is provided with a through hole, which connects the upper and lower chambers. One side of the upper chamber is provided with a steam inlet pipe, and the other side is provided The steam connecting pipe is connected to the same side of the lower chamber, a steam outlet pipe is arranged on the same side of the lower chamber and the steam inlet pipe, and a flow distribution valve is arranged on the steam connecting pipe.

Preferably, a heat sink is provided on the polished rod. The baffle is arranged in the center of the fluid pipeline, and divides the upper and lower chambers into equal parts.

The invention has beneficial effects: it is suitable for petrochemical and other enterprises that are prone to condensate and crystallization, avoids maintenance, reduces errors, reduces trade disputes, and is safe to use. Compared with ordinary jackets, the temperature of the wetted parts is uniform, which completely eliminates condensate.

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