scholarly journals Research on Fast Lock Anchorage Tools

2020 ◽  
Vol 9 (7) ◽  
pp. 137
Author(s):  
Fan Chen ◽  
Wendong Wan ◽  
Rong Xu ◽  
Qianye Zhang
Keyword(s):  
Cylinder Liner ◽  
Cover Plate ◽  
Assembly Process ◽  
Drive Gear ◽  
New Type

This paper deals with a new type of fast locking anchoring tool to meet the requirements of formwork fixing, which is mainly composed of electric wrench, rotary shaft, support bearing, cylinder liner, end cover plate, drive gear, gear jacket, drive rack, pin, crescent support, crescent buckle plate, shell and shell cover, etc. The process of machining and manufacture of each key component and the whole assembly process of key components are detailed, which prove that the product has good application effect.

Experimental and numerical investigation on the vertical bearing behavior of discrete connected new-type precast reinforced concrete floor system

2020 ◽  
Vol 23 (11) ◽  
pp. 2276-2291
Author(s):  
Rui Pang ◽  
Yibo Zhang ◽  
Longji Dang ◽  
Lanbo Zhang ◽  
Shuting Liang
Keyword(s):  
Reinforced Concrete ◽  
Bearing Capacity ◽  
Cover Plate ◽  
Load Bearing Capacity ◽  
Load Bearing ◽  
Concrete Floor ◽  
New Type ◽  
Vertical Bearing ◽  
Floor System ◽  
Bearing Behavior

This article proposes a new type of discrete connected precast reinforced concrete diaphragm floor system that consists of precast flat slabs and slab joint connectors. An experimental investigation of discrete connected new-type precast reinforced concrete diaphragm under a vertical distributed static load was conducted, and the effect of slab joint connectors on the load-bearing capacity was evaluated. Then, a finite element analysis of discrete connected new-type precast reinforced concrete diaphragm, precast reinforced concrete floors without slab connectors, and cast-in-situ reinforced concrete floor were performed to understand their working mechanism and determine the differences in load-bearing behavior. The results indicate that the load-bearing capacity and stiffness of discrete connected new-type precast reinforced concrete diaphragm increase considerably as the hairpin and cover plate hybrid slab joint connectors can efficiently connect adjacent precast slabs and enable them to work together under a vertical load by transmitting the shear and moment forces in the orthogonal slab laying direction. The deflection of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction is mainly caused by the opening deformation of the slab joint and the rotational deformation of the precast slabs. This flexural deformation feature can provide reference for establishing the bending stiffness analytical model of discrete connected new-type precast reinforced concrete diaphragm in orthogonal slab laying direction, which is vitally important for foundation of the vertical bearing capacity and deformation calculation method. The deflection and crack distribution patterns infer that the discrete connected new-type precast reinforced concrete diaphragm processes the deformation characteristic of two-way slab floor, which can provide a basis for the theoretical analysis of discrete connected new-type precast reinforced concrete diaphragm.

Design and Application of High-Efficiency and Energy-Saving Liner in Coal Pulverizer

2011 ◽  
Vol 308-310 ◽  
pp. 237-240
Author(s):  
Xiang Lu ◽  
Li Jun Ren
Keyword(s):  
High Efficiency ◽  
Cylinder Liner ◽  
Base Plate ◽  
Wave Crest ◽  
Material Consumption ◽  
Long Term Stability ◽  
New Type ◽  
Height Increase ◽  
Grinding Efficiency

The process of liner wear and the changing characteristics of the ability of crushing and grinding in the coal pulverizer are analyzed, a new type of cylinder liner is developed, which has a multi-step wave crest. The small balls on the liner are stuck by the steps, in this way, the wear of the liner wave crest is lightened, so it can keep a long-term stability, it also can take the balls to a reasonable height, increase the number of the balls which are taken by the wave crest and make the dropping points scattered, as result of that, it substantially increased the coal pulverizer's crushing and grinding efficiency; Also the wave crest of the liner can be dismantled from the base plate and individually replaced, so it made a great reduce in the material consumption of liner. The test shows that, with appropriate use of the balls, the liner can reduce the ball charge by 35-50%, reduce power consumption by 30-40%，it also can keep the coal pulverizer's output and improve milling fineness.

Vacuum Packaging of MEMS by Self-Assembly

2012 ◽  
Vol 134 (2) ◽  
Author(s):  
Royi Naveh ◽  
Eyal Zussman
Keyword(s):  
Self Assembly ◽  
Mechanical Characteristics ◽  
Cover Plate ◽  
Assembly Process ◽  
Contact Lines ◽  
Shear Tests ◽  
Micro Electro Mechanical Systems ◽  
Viscous Forces ◽  
Micro Sensor ◽  
Bonding Technique

The development of a solder-based vacuum bonding technique for micro-electro mechanical systems (MEMS) applications is presented. A chip with a micro-sensor was bonded to a cover plate to form a sealed cavity. The method relies on a solder-based hybridization comprising a self-assembly process that takes advantage of the surface tension and viscous forces of the solder. A model of the assembly was developed to predict the capillary instability of the solde, and the dynamic behavior of the assembled chip. Experimental results showed that a molten bead with parallel contact lines is stable when the ratio between the solder height and solder width is less than one half. Misalignment attributed to the self-assembly process was within a few microns. Fractographic analysis and leak and shear tests confirmed the predicted sealing and mechanical characteristics of the bonding. This method is especially suitable for bonding wafers in a vacuum for MEMS and other micro-devices, at low manufacturing temperatures (∼250 °C).

Resisting Seismic Behavior Study of an Adding Cover-Plate Protocol Used For D-Type Eccentrically Braced Steel Frames

2010 ◽  
Vol 163-167 ◽  
pp. 567-575 ◽  
Author(s):  
Xiu Zhen Pan ◽  
Ji Ping Hao ◽  
Jie Gao
Keyword(s):  
Seismic Behavior ◽  
Cover Plate ◽  
Lateral Loads ◽  
Braced Frames ◽  
Eccentrically Braced Frames ◽  
Earthquake Energy ◽  
Behavior Study ◽  
Scale Ratio ◽  
New Type ◽  
Rare Earthquake

This paper suggests a new connection protocol, adding cover-plate between shear links and column, which was used to enhance moment and shear carrying capacity of beam, relax the restriction and assure the sufficiency development of plastic deformation of the link, and dissipate more earthquake energy. Considering the scale ratio of 1:3, the experimental data was achieved by a specimen under cyclic loading, which was verified by nonlinear finite element analyses. Results indicate that the new type of eccentrically braced steel frame have enough stiffness and deformation capacity, draw link away from flange of column, and dissipate more earthquake energy. The single diagonal eccentrically braced frames adopted adding cover-plate protocol will ensure sufficient lateral stiffness under ordinary circumstances, including lateral loads due to wind and moderate seismic disturbances, have preferable resisting seismic behavior under rare earthquake, and be so practical and costly that it can be easily applied in present project.

A novel hybrid self-assembly process for synthesising stratified polyethylene–organoclay films

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75640-75650 ◽  
Author(s):  
Ali Akbar Motedayen ◽  
Carole Guillaume ◽  
Emmanuelle Gastaldi ◽  
Olivier Félix ◽  
Nathalie Gontard
Keyword(s):  
Self Assembly ◽  
Multilayer Film ◽  
Assembly Process ◽  
New Type

This study reports the first effort to synthesize a new type of polyethylene–organoclay multilayer film with subsequent repeating depositions.

Design and Numerical Analysis of a Vane Shaped Receiver Hole in a Cover-Plate Preswirl System

2018 ◽  
Vol 141 (4) ◽  
Author(s):  
Yuxin Liu ◽  
Gaowen Liu ◽  
Xiaozhi Kong ◽  
Yangang Wang
Keyword(s):  
Temperature Drop ◽  
Operating Conditions ◽  
Cover Plate ◽  
Cooling Performance ◽  
Aerodynamic Loss ◽  
Low Leakage ◽  
System A ◽  
New Type ◽  
Model C ◽  
Plate System

In a cover-plate system, rotating receiver hole is an important component, because its structure and characteristics directly influence the aerodynamic loss and cooling performance in the preswirl system. A new type of vane shaped (VS) receiver hole was designed and presented in this paper. Numerical simulations were carried out to compare the performances among high-radius direct transfer system (model-A), low-radius cover-plate system with simple drilled (SD) receiver holes (model-B), and low-radius cover-plate system with VS receiver holes (model-C). Results indicate that for the operating conditions simulated here, temperature drop effectiveness of the high-radius preswirl system is much better compared to the low-radius system with SD receiver hole. With VS receiver hole, the aerodynamic loss in model-C is the lowest. The nondimensional static pressure at preswirl nozzle exit is only 0.93, around 10% lower than model-B. Moreover, it has a more remarkable cooling performance. The temperature drop effectiveness of model-C can be as high as 0.52, around 67.7% higher compared to model-A. The system with VS receiver hole could not only realize the advantage of low leakage flow as a low-radius system, but also could achieve higher temperature drop compared to high-radius system.

The Microstructure of Shock-Synthesized Diamond

1967 ◽  
Vol 25 ◽  
pp. 324-325
Author(s):  
Lucien F. Trueb
Keyword(s):  
Single Crystals ◽  
Preferred Orientation ◽  
High Magnification ◽  
Texture Pattern ◽  
Shock Process ◽  
New Type ◽  
Diffraction Diagram

A new type of synthetic industrial diamond formed by an explosive shock process has been recently developed by the Du Pont Company. This material consists of a mixture of two basically different forms, as shown in Figure 1: relatively flat and compact aggregates of acicular crystallites, and single crystals in the form of irregular polyhedra with straight edges.Figure 2 is a high magnification micrograph typical for the fibrous aggregates; it shows that they are composed of bundles of crystallites 0.05-0.3 μ long and 0.02 μ. wide. The selected area diffraction diagram (insert in Figure 2) consists of a weak polycrystalline ring pattern and a strong texture pattern with arc reflections. The latter results from crystals having preferred orientation, which shows that in a given particle most fibrils have a similar orientation.

New type electron gun with electrostatic and electromagnetic lenses

1978 ◽  
Vol 36 (1) ◽  
pp. 62-63
Author(s):  
T. Ichinokawa ◽  
H. Maeda
Keyword(s):  
Electron Microscopy ◽  
Electron Beam ◽  
Optimum Condition ◽  
Bias Voltage ◽  
Electron Gun ◽  
Charge Effect ◽  
Micro Fabrication ◽  
Maximum Brightness ◽  
New Type ◽  
The Ideal

I. IntroductionThermionic electron gun with the Wehnelt grid is popularly used in the electron microscopy and electron beam micro-fabrication. It is well known that this gun could get the ideal brightness caluculated from the Lengumier and Richardson equations under the optimum condition. However, the design and ajustment to the optimum condition is not so easy. The gun has following properties with respect to the Wehnelt bias; (1) The maximum brightness is got only in the optimum bias. (2) In the larger bias than the optimum, the brightness decreases with increasing the bias voltage on account of the space charge effect. (3) In the smaller bias than the optimum, the brightness decreases with bias voltage on account of spreading of the cross over spot due to the aberrations of the electrostatic immersion lens.In the present experiment, a new type electron gun with the electrostatic and electromagnetic lens is designed, and its properties are examined experimentally.

A new type of defect structure in 124-superconducting oxide revealed by HREM

1991 ◽  
Vol 49 ◽  
pp. 1092-1093
Author(s):  
R. Sharma ◽  
B.L. Ramakrishna ◽  
N.N. Thadhani ◽  
D. Hianes ◽  
Z. Iqbal
Keyword(s):  
Shock Wave ◽  
Defect Structure ◽  
Neutron Radiation ◽  
Weak Links ◽  
Defect Structures ◽  
New Materials ◽  
New Type ◽  
Current Densities ◽  
Processing Techniques ◽  
Microstructural Studies

After materials with superconducting temperatures higher than liquid nitrogen have been prepared, more emphasis has been on increasing the current densities (Jc) of high Tc superconductors than finding new materials with higher transition temperatures. Different processing techniques i.e thin films, shock wave processing, neutron radiation etc. have been applied in order to increase Jc. Microstructural studies of compounds thus prepared have shown either a decrease in gram boundaries that act as weak-links or increase in defect structure that act as flux-pinning centers. We have studied shock wave synthesized Tl-Ba-Cu-O and shock wave processed Y-123 superconductors with somewhat different properties compared to those prepared by solid-state reaction. Here we report the defect structures observed in the shock-processed Y-124 superconductors.

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