4results about How to "Guarantee controllability" patented technology

This invention provides a residual-temperature assisted multi-heat-source synergistic modulation welding device and method, relating to the fields of laser welding and friction stir welding, aiming to solve the problems of easy forming defects and performance degradation in welding aluminum-lithium alloys. The device outputs a composite heat source through a laser-arc composite heat source system to melt the welding wire and stabilize the molten pool with deep penetration on the front side of the workpiece; a motion system controls the movement of the friction stir heating system; a residual-temperature-airflow synergistic auxiliary temperature control system dynamically adjusts the temperature of the solid phase region of the molten pool; a monitoring and sensing system collects physical field modal data in real time and uploads it to the control system; a flexible tooling system is used to clamp the workpiece with variable curvature; the friction stir heating system applies dynamic shearing and mechanical upsetting forces in the residual high-temperature region on the back side, effectively improving defects such as back-side collapse and burn-through in the weld of the workpiece with variable curvature. The residual-temperature assisted multi-heat-source synergistic modulation welding method is applied to the residual-temperature assisted multi-heat-source synergistic modulation welding device.

The application discloses an anti-vibration buffer flow guide structure of a capacitance diaphragm vacuum gauge, and belongs to the technical field of vacuum measurement. The anti-vibration buffer flow guide structure comprises an outer shell, an anti-vibration isolation structure arranged between a diaphragm and the outer shell, and a buffer layer composed of an elastic material. A buffer type gas flow guide structure is arranged on a gas flow path between a gas inlet and the diaphragm, and the buffer type gas flow guide structure comprises multiple layers of flow guide plates arranged in sequence along a gas flow direction, and each layer of flow guide plate is arranged at an inclined angle with the gas flow direction. The buffer layer composed of the elastic material cuts off a rigid transmission path of vibration from the outer shell to the diaphragm, and effectively filters wideband mechanical noise. Meanwhile, multiple layers of flow guide plates with different inclined angles are arranged on the flow path between the gas inlet and the diaphragm. Under the joint action, false deformation signals caused by environmental vibration and gas pulsation are greatly reduced, so that the reading of the vacuum gauge under real working conditions is closer to the static pressure true value in the cavity.

This invention relates to the field of power transmission tower maintenance safety technology, and discloses a high-altitude fall protection device for power transmission towers, comprising: a fall protection load-bearing component and an inclined self-locking component. The fall protection load-bearing component includes a load-bearing base, two movable load-bearing members, and an elastic buffer. The load-bearing base has sliding engagement parts at both ends, and the two movable load-bearing members slide with the load-bearing base, allowing them to move closer or further apart. These two components are used to connect the fall protection suit to the power transmission tower. The elastic buffer is installed between the two movable load-bearing members and applies opposing driving forces. The inclined self-locking component includes a load-bearing part, multiple first inclined structures, second inclined structures, and an elastic pre-tightening member. The load-bearing part slides synchronously with the movable load-bearing members. The first inclined structures are located on the load-bearing part, and the second inclined structures have forward and reverse installation parts for alternating forward and reverse installation. The elastic pre-tightening member applies a pre-tightening force; the forward-installed second inclined structures can wedge tightly with the first inclined structures for self-locking, while the reverse-installed ones cannot form a self-locking mechanism. This improves the controllability of the fall braking distance.

The application relates to the technical field of waste heat recovery of pneumatic ash conveying systems, and discloses an energy-saving control device for a power plant pneumatic ash conveying system. In the application, the device housing is provided with a motor bin on the upper surface, a bottom fixing ring is fixedly installed on the upper surface of the device housing, a gas conveying pipe is arranged in the bottom fixing ring, a circular baffle is rotatably arranged in the bottom fixing ring, a rotating rod is welded to one end of the circular baffle, and a motor is fixedly connected to the rear end of the rotating rod. In the power plant pneumatic ash conveying system, the intermittent airflow of the gas conveying pipe, i.e. periodic start-stop or airflow adjustment, can optimize the system performance and bring multiple economic benefits and technical advantages, effectively reduce local wear and tear, avoid long-term high-pressure impact on the pipeline, reduce the probability of weld cracking, avoid pipeline blockage or imbalance of ash-gas ratio caused by overload, reduce invalid airflow emission through intermittent conveying, reduce the load of the end dust removal equipment, and thus reduce the risk of dust escape.