5results about How to "Strong security and reliability" patented technology

The application discloses an automatic tool changing device, which comprises a fixed frame body, a guide rail arranged on the fixed frame body, a sliding beam in sliding cooperation with the guide rail, an extension mechanism for driving the sliding beam to slide on the guide rail, a pair of clamping pieces arranged symmetrically on the sliding beam and used for automatically clamping a hob, and a locking mechanism arranged between the sliding beam and the clamping pieces and used for locking the clamping pieces; the clamping pieces on the sliding beam can be driven to extend into a hob box and automatically clamp the hob through the extension mechanism, the clamping pieces are locked through the locking mechanism, the clamping pieces stably clamp the hob, the hob is finally pulled out through the extension mechanism, the old hob is removed, and the new hob can be loaded in reversely, so that the manual tool changing is replaced, time and labor are saved, and the safety and reliability are high.

The application discloses a mechanical self-locking type concrete precast pile joint structure and a construction method, which comprises an upper end plate, a lower end plate and a connecting structure composed of an upper sleeve, a lower sleeve, two groups of wedge pieces, two groups of positioning rings and two connecting steel bars; the connecting structure has multiple groups and is arranged between longitudinal steel bars in an upper precast pile and a lower precast pile respectively, and is used for connecting the upper precast pile and the lower precast pile. The longitudinal steel bars in adjacent concrete precast piles are mechanically connected one by one by the sleeve, the connecting steel bar, the positioning ring and the wedge piece; the force transmission of the longitudinal steel bars in the precast piles is direct and reliable; after the piles are connected, the longitudinal steel bars in the upper and lower pile bodies are mechanically self-locked; the longitudinal steel bars after connection cannot be pulled apart; the safe and reliable, convenient construction and low-cost goal of the concrete precast pile joint is achieved; and meanwhile, the construction method can also be used for connecting concrete components such as concrete precast columns and concrete precast shear walls.

The invention belongs to the technical field of bridge construction equipment, and particularly relates to a shoal steel trestle steel pipe pile foundation guide hole operation platform and a construction method.The shoal steel trestle steel pipe pile foundation guide hole operation platform comprises a platform body, four supporting legs and an automatic leveling system, the four supporting legs are located at the four corners of the bottom face of the platform body respectively and connected with the platform body, and the automatic leveling system is in linkage fit with the platform body and the supporting legs; the automatic leveling system can cope with platform inclination caused by natural factors such as tidal water scouring and stormy waves in real time, and can resist the influence of three-level stormy waves; meanwhile, due to the design of an anti-skid cover plate, a cable storage groove and the like of the platform, potential safety hazards in the construction process are further eliminated, and the safety of constructors and equipment is comprehensively guaranteed; the platform main body is designed by adopting high-strength steel, so that the bearing capacity is high, and various drilling machines can be adapted; a reserved hoisting interface and a reserved cable storage groove facilitate installation and arrangement of equipment, and construction convenience is improved; the whole platform is simple in structure, convenient to operate and easy to maintain, and has good application and popularization value.

The invention relates to the field of electric leakage detection and electric power safety, and discloses an electric leakage backflow accurate metering and inversion boost grid-connected harmonic active counteracting system fused with an AI multi-feature fusion algorithm, and the system comprises a data collection module which is used for synchronously collecting an electric leakage voltage signal and an electric leakage current signal; the intelligent identification module is used for operating a fusion intelligent identification model fusing variational mode decomposition, hyper-parameter optimization, a gating circulation unit and an attention mechanism so as to carry out processing and feature analysis on the electric leakage related signals, and outputting an electric leakage type identification result and a corresponding classification confidence coefficient; the metering management module is used for carrying out adaptive gain adjustment on the collected signals according to the classification confidence coefficient, and metering electric leakage backflow electric energy parameters based on the adjusted signals; and the energy conversion and treatment module is used for converting and boosting electric leakage backflow energy and synchronously executing harmonic active offset control and grid-connected inversion control. Accurate identification of electric leakage types is realized, and essential fault electric leakage and normal leakage current are distinguished.

This invention discloses a method for coring ultra-deep cutoff walls. First, a mud pump is activated to deliver special plant-based adhesive mud. A large-diameter double-tube drill bit equipped with a diamond drill bit is used to drill and extract the core at low pressure and slow rotation. After drilling to the predetermined depth, the mud pump is shut off, and a cable winch is used to lift the drill bit. A continuous steel borehole pipe of equal diameter is installed at the bottom. The drill bit is then replaced with a small-diameter double-tube drill bit equipped with a diamond drill bit, and the mud pump is activated again. A segmented drilling and coring cycle process is employed. During drilling and coring, borehole inclination is monitored based on a preset inclination measurement frequency. If deviation occurs, a new drill bit and an extended drill bit are used to repeatedly sweep the borehole at low pressure and slow rotation, inject cement grout, or use a deviation correction device for dynamic correction. By optimizing the drill bit combination and coring parameters, the core recovery rate is ensured to be no less than the preset value. This invention effectively solves the technical problems of easy deviation, low drilling efficiency, low core recovery rate, and poor integrity in ultra-deep cutoff wall drilling, providing reliable technical support for the quality assessment of ultra-deep cutoff walls.