Shandong University

Haozhou Drilling Engineering Machinery (shandong) Co., Ltd.

Da Zhang

Jie Liu

Ke Wu

Hetao Hou

Peng Zhang

Li Tian

Fengjin Zhao

Zeying Yang

Tianmin Wang

Fan Yang

Weisong Qu

Cuiping Qu

Qianyi Yang

Yinglin Sun

Gongfeng Xin

Huiqin Zhang

Yangchun Wang

Naixuan Ma

Chuanchang Xu

Yechen Zhao

Chengliang Yan

Fengzheng Jing

Yechun Zhao

Guoliang Qin

Yeshui Zhao

Liqiang Gao

A full-hole reverse circulation cluster-type down-the-hole (DTH) hammer with multiple independent channels is provided. The DTH hammer includes a drill rod, a drill rod joint, a drill rod air pipe, a diversion chamber, at least one hammer, and an upper pressure plate, a lower pressure plate, and an upper outer hammer protection pipe for fixing the hammer, where at least one jet air pipe communicated with the diversion chamber and at least one drill cuttings discharge pipe are arranged between the hammers; lower ends of the jet air pipe and the drill cuttings discharge pipe are located close to a hammer drill bit; and the lower end of the jet air pipe is provided with jet holes for producing a negative pressure.

Full-hole reverse circulation cluster-type down-the-hole (DTH) hammer with multiple independent channels

An intelligent vehicle capturing apparatus for a high-pier bridge includes: a double-layer metal protective net; and a support unit and an actuation unit connected to the double-layer metal protective net. The double-layer metal protective net is mounted to a backside of the high-pier bridge through the support unit. The actuation unit includes a hydraulic link mechanism. The hydraulic link mechanism is connected to one end of the double-layer metal protective net. The hydraulic link mechanism is moved to unwind the double-layer metal protective net on the backside of the high-pier bridge to capture a vehicle. In this way, the apparatus stops and buffers a vehicle that is about to rush out of a high-pier bridge.

Intelligent vehicle capturing apparatus and method for high-pier bridge

The present disclosure provides a system and method for measuring energy conversion efficiency of an inertia friction welding (IFW) process in a non-contact manner. The system includes an IFW machine, a Hall sensor, a data acquisition module, a processing module and a stabilized direct current (DC) power supply. The stabilized DC power supply provides electrical energy for the Hall sensor. The Hall sensor is provided beside a flywheel of the IFW machine, so that the flywheel is within a detection range of the Hall sensor. A magnet is provided on the flywheel. The data acquisition module acquires a Hall electric potential change caused by a relative movement between the magnet and the Hall sensor during the IFW process, and transmits the Hall electric potential change to the processing module to calculate the energy conversion efficiency of the IFW machine.

System and method for measuring energy conversion efficiency of inertia friction welding machine

Growing community of inventors

Jinan, China

Da Zhang