Globe (jiangsu) Co., Ltd.

Nr Electric Co., Ltd

Nr Engineering Co., Ltd

Makita Corporation

China University of Mining and Technology

Sobute New Materials Co., Ltd

Bote New Materials Taizhou Co., Ltd.

Nanjing Ruiying Runze Biopharmaeutical Technology Co., Inc.

Wuxi Aleader Intelligent Technology Co., Ltd

Xuzhiu Kerui Mining Technology Co., Ltd.

Tao Wang

Lingao Zhang

Yuexun Cao

Dongming Cao

Wei Shi

Taixun Fang

Yeyuan Xie

Wenjie Wang

Bing Yang

Bin Liu

Wei Lv

Zhencai Zhu

Gongbo Zhou

Bing Wang

Wataru Suzuki

Fan Jiang

Jiaping Liu

Qianping Ran

Jun Liu

Fei Huang

Lin Ding

Yu Li

Yan Liu

Shuai Qi

Shimin Fan

Jianfeng Ma

Xiazi Li

Xin Liu

Libing Wang

Chuansheng Zhang

Niansheng Liu

Jing Shang

Naixin Gao

Lele Li

Yinan Guo

Mingli Lei

Chuansong Wang

Duifang Gu

Shudong Wang

Lianfeng Han

Dongrun Liu

Lizheng Li

Fuxing Shi

Guohong Qin

Ting He

Liangzhong Wei

Wanglong Zhu

Zheng Han

The present disclosure discloses a time service and positioning network system for an underground chain-shaped large space in a coal mine. The system adopts a base station-level network internal time synchronization method which takes an optical fiber time service as a main part and takes a satellite time service as an auxiliary part to construct a time service and positioning network system with an unified time within the ad-hoc network base stations, based on the ad-hoc network base stations linearly arranged in the underground chain-shaped large space in the coal mine. Through the network construction, the network stabilization and the network application, the system unifies the time reference of the base station-level network and improves the positioning accuracy of the network application by utilization of the base station-level network internal time synchronization method. The system integrates the time service and positioning network system suitable for the underground coal mine and expands the network applicability based on an existing underground communication ring network.

Time service and positioning network system for underground chain-shaped large space in coal mine

The disclosure provides an electric drill comprising: a housing; a motor for driving the electric drill to work; an output assembly for outputting the power of the motor; a first brake assembly including a driving disc and a driven disc respectively arranged on the transmission shaft and the output shaft, the driving disc being meshed with the driven disc to transmit power in a non-braking state, and the driving disc and the driven disc being displaced in the axial direction to be separated from each other in a braking state to stop transmitting power; and a second brake assembly including a mass block and a micro switch connected with the motor, and in a braking state, the mass block displacing and triggering the micro switch to stop the motor.

Electric drill

A chain saw includes a housing, a motor, a chain saw bar assembly, a tensioning assembly set on the housing, and an adjustment assembly set on the side cover corresponding to the tensioning assembly. The chain saw bar assembly is detachably connected to the first housing through the combination of the tensioning assembly and the elastic components, the adjustment assembly is movably connected with the tensioning assembly, and the adjustment assembly can adjust the relative position of the tensioning assembly and the guide shaft, to tension the chain set on the circumferential direction of the guide bar and tightly lock the chain saw bar assembly between the first housing and the side cover.

Chain saw

A reciprocating saw comprises a housing, a blade assembly, a reciprocating rod assembly, a driving assembly and an operation mechanism. The blade assembly extends forward from one side of the housing, and comprises a positioning structure. The reciprocating rod assembly is detachably connected with the blade assembly and comprises a blade fixing structure and an unlocking component matched with the positioning structures. The driving assembly is accommodated in the housing, and drives the reciprocating rod assembly to drive the blade assembly to perform reciprocating motion. The operation mechanism is installed on the housing and moves between a locking position and an unlocking position and comprises an operation button, a drive cam matched with the unlocking components and an elastic reset component for resetting the operation button.

Reciprocating saw

Embodiments of the invention relate to concrete admixtures, provide a phosphonato block polymer, a preparation method and an application. The method includes: the phosphonato block polymer prepared by copolycondensating an ether-type segment A, a phosphonato segment B, and a third part of aldehyde C. The ether-type segment A is obtained by polycondensating a polyether monomer and a first part of aldehyde C. The phosphonato segment B is obtained by polycondensating a monomer b containing phosphonato, a monomer c, and a second part of aldehyde C in an aprotic weak polar solvent E. By preparing a block polymer using arylalkane as a main chain and using a phosphonic acid or phosphinic acid functional group as an adsorption group, the invention improves the resistance of the block polymer to sulfate and clay interference, and can achieve initial high dispersion of concrete with a low water-cement ratio and decreasing of the system viscosity.

Phosphonato block polymer, preparation method therefor and application thereof

Portable electric circular saw body

The present invention provides a chain saw, which includes a housing, a driving assembly mounted on the housing, a guide plate extending outward from the housing, a chain arranged on the guide plate and driven by the driving assembly, and a tension assembly for tightening the chain. The tension assembly includes an operating member and a driving member driven by the operating member, the driving member cooperates with the guide plate, and when a driving force is applied to the operating member, the driving member is driven and the guide plate is moved to tension the chain, and after the chain is tensioned, if the driving force is continuously applied to the operating member, the operating member disengages with the driving member, and the operating member continues to move to compress the guide plate.

A bridge-type circuit comprises a H-bridge switch module and a buffering and reclosing module. The H-bridge switch module comprises four power semiconductor switch devices. Every two of the four power semiconductor switch devices are connected in series in the same direction to form a bridge arm, and the two bridge arms are further connected in parallel. Middle points of the two bridge arms respectively serve as an input terminal and an output terminal. The buffering and reclosing module is connected in parallel with the two bridge arms of the full bridge module. Also provided are a direct current breaking device formed by connecting the above bridge-type circuits in cascade and a control method thereof. The direct current breaking device is provided with the buffering and reclosing module, such that line voltage fluctuation generated during a reclosing operation is small.

Bridge-type circuit, and direct current breaking device and control method thereof

A direct current switch-off device comprises an on-state current branch circuit and a current commutating and breaking unit which are connected in parallel. The on-state current branch circuit has a mechanical switch (S) and a current transfer module which are connected in series. The current commutating and breaking unit comprises a bridge-type branch circuit and a current-breaking branch circuit. The current-breaking branch circuit and two bridge arms of the bridge-type branch circuit are connected in parallel. The current-breaking branch circuit comprises a nonlinear resistor (RI) and a valve group consisting of fully-controlled devices connected in series. The nonlinear resistor (RI) and the valve group are connected in parallel. Two ends of each fully-controlled device in the valve group are connected in parallel with a buffering and reclosing circuit.

Direct current switch-off device and control method thereof

Disclosed are a compound pharmaceutical composition containingBoiss et Hout as a lipid-lowering active ingredient and the use of the composition for preparing a drug for treating or preventing lipid metabolism disorders, wherein the composition comprises a pharmaceutically active ingredient and a pharmaceutically acceptable carrier, wherein the pharmaceutically active ingredient consists of quercetin-3-O-&#x3b2;-D-glucuronoside, isoquercitrin and quercetin at a molar ratio of 1.1-2.4:1.3-3.3:1.2-3.1.

Compatible composition containing chinese medicine cichorium glandulosum boiss et hout as lipid-lowering active ingredient

A combined leg structure of a micro bridge unit of a focal plane array adopts a conductive polymer film or a doped conductive polymer film to serve as an extraction electrode in the micro bridge unit of the focal plane array, which contacts a vanadium oxide thermosensitive film or a doped vanadium oxide thermosensitive film of a bridge surface layer, so as to electrically connect the thermosensitive film of the micro bridge unit with a read-out circuit. The combined leg structure includes three layers: respectively an upper SiNx film layer, a lower SiNx film layer and a middle layer of the conductive polymer film or the doped conductive polymer film. The present invention adopts the conductive polymer film or the doped conductive polymer film having a low thermal conductivity to serve as an electrode material. A bridge leg absorption structure is arranged in the combined leg structure.

Combined leg structure of micro bridge unit of focal plane array

Growing community of inventors

Jiangsu, China

Tao Wang