Inertia impactor with adjustable impact distance and dust concentration measuring method
An inertial impact and dust concentration technology, applied in measuring devices, instruments, particle size analysis, etc., can solve the problems of increased cost of use, many parts of the dust analyzer, and inconvenient carrying, and achieve the effect of portable cost, low cost, and easy portability
Pending Publication Date: 2020-11-27
NANHUA UNIV
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Problems solved by technology
[0007] The purpose of the present invention is to overcome the deficiencies in the prior art, and provide a kind of impact distance adjustable inertial impactor and dust concentration measurement method, it solves the problem that the existing inertial impactor can only be used to measure the dust of single PM value Concentration, which in turn causes the dust analyzer to carry too many parts in actual use, resulting in inconvenience to carry and increased use costs
Method used
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Embodiment 1
[0031] Such as Figure 1-5 As shown, the inertial impactor with adjustable impact distance includes a casing 1 , an impact plate 2 , a casing 3 and a positioning block 4 .
[0032] The shell 1 is provided with an inner cavity, and the two ends of the shell 1 are respectively provided with an air inlet nozzle 11 and an air outlet hole 12 connected to the inner cavity. The outer wall of the air inlet nozzle 11 is provided with a plurality of positioning grooves A111 arranged at intervals in the axial direction and a positioning groove B112 extending in the axial direction and communicating with all the positioning grooves A111 in sequence.
[0033] The edge of the impact plate 2 is provided with vent holes 21 penetrating through its two side surfaces. The impact plate 2 is fixedly installed in the inner cavity of the shell 1, and divides the inner cavity of the shell 1 into a cavity C13 and a cavity D14. The cavity C13 and the cavity D14 are only communicated through the vent h...
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The invention discloses an inertia impactor with an adjustable impact distance and a dust concentration measuring method, and relates to the field of dust concentration measuring instruments. The inertia impactor with the adjustable impact distance comprises a shell, an impact plate and a sleeve. An inner cavity is formed in the shell, and the two ends of the shell are provided with an air inlet nozzle and an air outlet hole respectively, the sleeve is movably installed in the air inlet nozzle, the front end of the sleeve communicates with the exterior of the shell, the rear end of the sleevecommunicates with a cavity C, and the sleeve right faces the center area of the impact plate and can move along the air inlet nozzle so that the rear end can get close to or get away from the impact plate. The dust concentration measuring method is applied to the inertia impactor with the adjustable impact distance and can measure the dust concentration of different PM values. The inertia impactorand the dust concentration measuring method have the advantages that the dust concentrations with different PM values can be measured by the single device, and the sleeve is mounted at different depth positions of the air inlet nozzle, so that the distance between the rear port of the sleeve and the impact plate is changed, and the dust concentrations with different PM values can be selectively measured.
Description
technical field [0001] The invention relates to the field of dust concentration measuring instruments, in particular to an inertial impactor with adjustable impact distance and a dust concentration measuring method. Background technique [0002] Inertial impactor is a device that blocks particles of a certain particle size and above based on inertial impact. It is used in dust concentration measuring instruments, depending on the specifications of the selected inertial impactor (such as cut-off diameter 10μm, 4μm, 2.5μm, 1μm) , the dust concentration measuring instrument can measure the concentration of dust PM corresponding to the inertial impactor. [0003] The structure of the existing inertial impactor is as follows Figure 6 As shown, it includes a shell 5 and an impact plate 6; an inner cavity is provided inside the shell 5; the impact plate 6 is fixedly installed in the inner cavity of the shell 5, and the inner cavity of the shell 5 is divided into a cavity A and a c...
Claims
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IPC IPC(8): G01N15/02
CPCG01N15/0255G01N2015/0261
Inventor 彭小勇吴政江张豪陈丽园林豹
Owner NANHUA UNIV