Can be spliced ​​isodynamic sampling head, non-linear splicing plate and isokinetic sampling head group

Abstract

The invention belongs to the field of dynamic sampling heads and provides a splicable isodynamic sampling head, a non-linear splicing plate and an isodynamic sampling head group. The non-linear splicing plate splices the splicable isodynamic sampling heads to form an isodynamic sampling head group. The splicable and other power sampling head includes a sampling head unit and a sampling head interface, the sampling head interface is detachably arranged on the upper end of the sampling head unit, and the left and right side baffles of the sampling head unit can be detachably arranged on the On both sides of the main body, the splicing lengths of the left folded plate and the right folded plate are equal, and the sampling area of ​​each sampling head is still equal after splicing, which ensures the equal dynamic characteristics and improves the accuracy of the high-efficiency filter leak detection test The deflector group is fixed between the front baffle and the rear baffle, which not only ensures the uniform cross-sectional wind speed during sampling, but also overcomes the stress and deformation during splicing and installation. It can be used alone or spliced ​​together. Improved efficiency of HEPA filter leak testing.

Description

technical field [0001] The invention belongs to the field of dynamic sampling heads, and in particular relates to a splicable isodynamic sampling head, a non-linear splicing plate and a group of isodynamic sampling heads. Background technique [0002] High-efficiency filters are mainly used to capture particulate matter and various suspended solids in the air, and are often used in the terminal filtration of clean air conditioning systems. Particle counting method and photometer method are very important methods for leak detection of HEPA filters. Isokinetic sampling is required whether particle counting or photometric counting is used. Isokinetic sampling is a sampling method for collecting particles and various suspended solids in the air. When collecting suspended particles in the airflow, in order to make the collected samples representative, the airflow velocity entering the sampler must be the same as the airflow velocity near the sampling point. Only in this way ca...

AI Technical Summary

Problems solved by technology

However, the conventional sampling head is integrated, the surrounding surfaces are fixed and cannot be disassembled, and the shape of the sampling port is rectangular. When splicing is required, multiple conventional sampling heads are directly spliced ​​together, and the splicing seam is a straight line. In this way, there will be more obvious seams at the splicing of the two connected sampling heads

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