Baffle differential pressure type fluid flow measuring device

Abstract

A baffle differential pressure type fluid flow measuring device comprises a plurality of sampling units connected into a whole, and each sampling unit comprises a positive pressure sampling end and a negative pressure sampling end. The positive pressure sampling end comprises a pressure gathering cylinder, a baffle connected to the bottom of the pressure gathering cylinder, a positive pressure sampling pipe inserted into the pressure gathering cylinder, and a first ash removal rod hung in the positive pressure sampling pipe; wherein the negative pressure sampling end comprises a negative pressure sampling pipe connected to the outer wall of the pressure gathering cylinder, and a second ash removal rod is hung in the negative pressure sampling pipe; the end parts of the plurality of positive pressure sampling pipes are communicated to converge into a positive pressure sampling port, and the end parts of the plurality of negative pressure sampling pipes are communicated to converge into a negative pressure sampling port; according to the baffle differential pressure type fluid flow measuring device, through the structural design of the pressure gathering cylinder and the pressure gathering plate, the positive pressure difference and the negative pressure difference can be increased, so that the measuring precision is improved, and blockage caused by flying dust and other impurities can be avoided through the ash removal rod at the sampling pipe.

Description

【Technical field】 [0001] The invention relates to the technical field of fluid flow measurement, in particular to a baffle plate differential pressure type fluid flow measurement device. 【Background technique】 [0002] At present, there are many types of fluid flow measurement devices in China, mainly including: airfoil type, Venturi type, flute type, Annubar type, Verabar type, orifice type, nozzle type, plug-in Venturi type and plug-in type Orifice plate type, etc., but in the flow measurement of dusty gas and dirty liquid, the use effect of each measuring device is not ideal. The main problems are: [0003] 1. In the measurement of dusty gas, due to the dust, the primary element of the measuring device is easily blocked. Similarly, for the flow measurement of impurity liquid, there is also the problem of blockage. It cannot be used reliably for a long time. All of the flow measuring devices described above do not address the clogging prevention problem well. [0004] 2...

AI Technical Summary

Problems solved by technology

[0002] At present, there are many types of fluid flow measurement devices in China, mainly including: airfoil type, Venturi type, flute type, Annubar type, Verabar type, orifice type, nozzle type, plug-in Venturi type and plug-in type Orifice plate type, etc., but in the flow measurement of dusty gas and dirty liquid, the use effect of each measuring device is not ideal. The main problems are:

[0003] 1. In the measurement of dusty gas, due to the dust, the primary element of the measuring device is easy to block. Similarly, for the flow measurement of impurity liquid, there is also the problem of blockage

not reliable for long term use

None of the above flow measurement devices solve the clogging problem very well

[0004] 2. If the airfoil type, Venturi type, orifice type and other flow measurement devices are used for the entire pipeline, the pressure loss will be large, and the power consumption of the fan will increase in long-term operation, and the energy saving effect will be poor;

[0005] 3. Many flow measurement devices have high installation requirements, and the required straight pipe sections before and after are long, which cannot be met in many occasions;

[0006] 4. Due to the large section of the pipeline and the uneven flow field, the average air volume in the pipeline cannot be accurately measured by the plug-in single-point measurement device;

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