Safekey Engineering Technology (Zhengzhou), Ltd.

Welead Infrastructure Engineering Technology (Zhengzhou), Ltd.

Zhengzhou Research Institute for Abrasives & Grinding Co., Ltd.

Huizhou Mingsheng Chemical Materials Co., Ltd.

Hui Liu

Peng Zhao

Hongyuan Fang

Yanhui Pan

Lei Wang

Fuming Wang

Chengchao Guo

Xianfeng Zhao

Mingrui Du

Guobin Qiao

Junyong Shao

Yanjun Zhao

Zhihui Jia

Shuai Xu

Wentao Zhou

Hongxing Pan

Xiaolei Wu

Bolun Cao

Jiong Zhao

Ning Yan

MPCVD device comprises deposition platform, substrate platform, lifting platform, microwave quartz window, upper cover plate, baseplate, pressure sensors, composite windows, thickness measuring device, visual device, temperature measuring device, plasma diagnostic device, vacuum sealing ring and microwave shielding sealing ring. Reaction cavity is formed by upper cover plate and baseplate, and inlet hole is arranged on top of upper cover plate, while exhaust hole is arranged on baseplate; microwave quartz window is annular shaped and arranged between deposition platform and baseplate, and reaction cavity is isolated from air outside by microwave quartz window; lifting platform is provided with vacuum channel and cooling channel therein; vacuum cavity, which is communicated with vacuum channel, is formed by lower surface of substrate platform and upper surface of lifting platform; and pressure sensor for monitoring gas pressure is arranged in vacuum cavity.

Large-size diamond, MPCVD device and preparation method of large-size diamond

A silicate-modified polymer grouting material for leakage plugging is provided, which belongs to the technical field of silicate modification, includes 60% by weight of silicate-modified aqueous solution component, and about 40% of structural flame-retardant isocyanate. According to the proportion of the main total amount, the main components are classified into inorganic components, so the silicate-modified polymer grouting material for leakage plugging has excellent flame retardant performance, oxygen index ≥35%, adhesion ≥1.5 mPa, maximum reaction temperature ≤95° C., odor level (80° C.) ≤3.5, fog test ≤5 mg (without physical additive flame retardants diffusion to the environment). In particular, a main component of the silicate-modified aqueous solution, endows it with good surface resistance.

Silicate-modified polymer grouting material for leakage plugging

A pressing-pulling device includes: a pressing-pulling bracket, wherein slotting oil cylinders are symmetrically and vertically mounted on the pressing-pulling bracket, and a piston rod of each of the slotting oil cylinders faces downwardly; a bottom end of the piston rod is connected to a connecting plate, and a through-hole is provided in a middle of the connecting plate; a continuous lifting mechanism is installed in a middle of the pressing-pulling bracket, and a slotting rod is vertically inserted into the continuous lifting mechanism; a lifting ring is installed at a top end of the slotting rod; a bottom end of the slotting rod extends downwardly through the through-hole to connect to a slotting cutter; a locking device is fixed on the connecting plate near the through-hole for fixing the slotting rod.

Composite slotting equipment combined static pressure and vibration of polymer anti-seepage wall and using method thereof

Growing community of inventors

Henan, China

Hui Liu