Embedded type anti-loosening back bolt with flexible cladding layer and back bolt assembly of embedded type anti-loosening back bolt

Abstract

The invention belongs to the technical field of back bolt connection, and relates to an embedded type anti-loosening back bolt with a flexible cladding layer and a back bolt assembly of the embedded type anti-loosening back bolt. The embedded type anti-loosening back bolt comprises a metal body, wherein a connecting cavity which penetrates through the metal body in the axial direction of the metalbody is arranged in the metal body; inner threads which are connected to a back bolt rod are arranged in the connecting cavity; the bottom of the metal body is bulged outwards to form an inverted cone shaped expanding part; the flexible layer is covered on the outer surface of the metal body in a clinging mode; and one end, close to the expanding part, of the flexible layer is bulged outwards along the expanding part to form an inverted cone shape, and one end, with the expanding part, of the metal body is sealed to form a back cover; and the metal body is fixedly connected to the flexible layer. Compared with the prior art, the embedded type anti-loosening back bolt has the advantages of being small in temperature influence, and not liable to crack boards by expanding.

Description

[0001] technical field [0002] The invention belongs to the technical field of back bolt connection, and in particular relates to an embedded anti-loosening back bolt with a flexible outer coating and a back bolt assembly thereof. Background technique [0003] In the prior art, it is usually used to pre-drill a hole of the size required for the back bolt on the plate, and then install the back bolt into the hole to carry out the pressure diffusion and back bearing force. For prefabricated wood-based panels, there are costs for pre-drilling and installing pressure back bolts. The most important thing is that the panels of prefabricated wood-based panels are very large, and a single piece needs to be hoisted. If the pre-drilled back bolt hole process is used, The equipment required for its processing is very large, and it needs to be equipped with a crane, which is easy to damage the plate during the drilling process, and its drilling cost is very expensive. [0004] Artificia...

AI Technical Summary

Problems solved by technology

For prefabricated wood-based panels, there are costs for pre-drilling and installing pressure back bolts. The most important thing is that the panels of prefabricated wood-based panels are very large, and a single piece needs to be hoisted. If the pre-drilled back bolt hole process is used, The equipment required for its processing is very large, and it needs to be equipped with a crane, which is easy to damage the plate during the drilling process, and the drilling cost is very expensive

[0004] Artificial panels have a curing process. During the curing process, embedding metal pipes in artificial panels can greatly reduce labor and manufacturing costs. However, artificial panels are usually high-strength concrete, which is brittle and hard. The thermal expansion coefficients of the metal tubes are different. When the temperature rises, the installation holes on the wood-based panels become smaller and the metal tubes become larger, causing the metal tubes to crack and collapse the wood-based panels, and the exposure to the air after cracking will also make the panels alkaline atmosphere Corrosion and swelling stress will be generated with metal bodies, including stainless steel, because stainless steel is acid-resistant and alkali-resistant, so it hides a huge safety hazard

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