Combined air exhaust passage and impact resistance detection method

Abstract

The invention discloses a combined air exhaust passage.An air exhaust passage with a closed cross section is jointly enclosed by a prefabricated thin plate and a wall body,the prefabricated thin plateand the wall body are connected and fixed by a connecting assembly, and a lateral support plate in the connecting assembly can improve the lateral force state of the air exhaust passage,and the lateral impact resistance and deformation performance of the combined air exhaust passage can be greatly improved. The invention further discloses an impact resistance detection method.Ato-be-measured surface and an impact point are determined according to the form of the cross section of a to-be-measured member, the positions of a top support point and a bottom support point are determined, and the to-be-measured surface is supported on a support device with a support block and in a horizontal or vertical state, an impact object perpendicularly impacts on the impact point,and the impact resistanceperformance is evaluated according to the state after the impact;the application of force is reasonable, the specification is comprehensive, and the impact resistance detection method is suitable forthe combined air exhaust passage with different crosssection sizes and reinforcing rib forms.

Description

technical field [0001] The invention belongs to an exhaust duct used in residential kitchens or toilets, in particular to a combined exhaust duct with a prefabricated thin-walled component as a cylinder body and high impact resistance. [0002] The invention also relates to a method for detecting the impact resistance of the combined exhaust duct, which can be used to detect and evaluate the impact resistance of the combined exhaust duct. Background technique [0003] Exhaust ducts are an essential building feature in kitchens and bathrooms in residential buildings. In the current product standard "Smoke (gas) duct products for residential kitchens and bathrooms" JG / T194-2018, the form of the exhaust duct is an integral cylinder with a closed cross-section composed of prefabricated steel mesh cement boards, and the cross-section is generally rectangle. Since the exhaust ducts are installed close to the wall in the residence, the gap between the exhaust duct and the wall su...

AI Technical Summary

Problems solved by technology

Although some L-shaped combined exhaust ducts have added reinforcing ribs at the edges of the two wings to improve deformation and damage during transportation and installation, but in terms of resistance to lateral (that is, perpendicular to the longitudinal axis of the exhaust duct) impact and In terms of deformation ability, compared with the traditional integral exhaust duct, it is equivalent to a cantilever member supported at only one end compared with a simply supported member supported at both ends. The investment in molding, demoulding and quality control has increased significantly, which has severely restricted the popularization and application of combined exhaust ducts (exhaust ducts composed of prefabricated thin plates with open cross-sections and walls)

[0005] In other existing technologies, although some combined exhaust ducts adopt measures such as setting special-shaped reinforcing ribs, increasing the bonding area between the reinforcing ribs and the wall, and pasting mesh cloth at the joints, the lateral resistance of the exhaust ducts can be improved. Impact and deformation capabilities, but cannot fundamentally change the stress state of the combined exhaust duct, high cost and poor effect

[0006] On the other hand, although the combined exhaust duct has been popularized and applied in more and more projects, there is no corresponding testing method for its impact resistance, which makes it difficult to accurately evaluate the quality of its products. The characteristics of the combined exhaust port Development and development of applicable impact resistance performance testing methods

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