Up and down double-expanded expansion anchor bolt used for anti-seismic support and manufacturing method

Abstract

The present invention relates to an up and down double-expanded expansion anchor used for anti-seismic supports, comprising: an anchor rod, a mitered top sleeve composed of sequentially connected upper expansion section, main section and lower expansion section, the upper end of which is provided with The small end is located on the upper side of the expansion top sleeve of the frustum-shaped head, and the flange nut; the anchor rod includes: a bolt rod with a frustum-shaped expansion head at the upper end, a screw rod whose outer diameter is larger than the diameter of the bolt rod and coaxially connected with the lower end of the bolt rod ; The mitered top sleeve is set outside the bolt rod and the inner diameter of the mitered top sleeve matches the outer diameter of the bolt; the lower end of the inner hole of the mitered top sleeve is provided with a frustum-shaped hole adapted to the frustum-shaped top; the expansion top The sleeve is set outside the screw rod and the frustum-shaped top extends into the frustum-shaped hole; the flange nut is located on the lower side of the expansion top sleeve and is screwed with the screw rod. The above-mentioned double-expanded expansion anchor bolt used for the anti-seismic support reduces the diameter of the installation hole on the building, reduces the strength of the building less, and is firmly connected with the installation hole and has better installation strength.

Description

technical field [0001] The invention relates to the technical field of support equipment, in particular to an up and down double-expanded expansion anchor used for an anti-seismic support and a manufacturing method thereof. Background technique [0002] In view of the huge destructiveness of the earthquake, the seismic performance is an important construction index that must be considered before building construction, and the laying of pipelines in the building is an important factor affecting the seismic performance; it is used to install building water supply, drainage, fire protection, heating, ventilation, air conditioning The anti-seismic support of mechanical and electrical engineering facilities such as gas, electricity, heat, and communication can limit the displacement of auxiliary mechanical and electrical engineering facilities when an earthquake occurs, control the vibration of the facilities, and transfer the load to various components or devices on the bearing s...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the shortcomings of the current expansion anchor bolts that are not conducive to the miniaturization of the expansion anchor bolts and use more materials, reduce the strength of the building more, and the connection with the installation hole is not stable enough and the installation strength is low. It is conducive to the miniaturization of expansion anchor bolts and the use of less materials, reducing the diameter of the installation hole on the building, reducing the strength of the building less, and the connection with the installation hole is stable and the installation strength is good. It is used for the expansion of the upper and lower expansion of the seismic support. Anchors and their production methods

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