9results about How to "Simple on-site operation" patented technology

This utility model provides a cable fixing structure for the handover test of a photovoltaic power station transformer substation, belonging to the technical field of cable fixing structures. The cable fixing structure includes: a wedge-shaped metal ring assembly divided into at least three circumferential segments, each segment having a spiral groove on its outer surface; a high-friction flexible pad tightly fitted to the inner circumferential surface of each segment; and an integral elastic steel ring surrounding the outer side of the metal ring assembly, the inner circumferential surface of which has a protruding ridge that engages with the spiral groove. When the elastic steel ring rotates relative to the metal ring assembly, the protruding ridge slides along the spiral groove, driving each wedge-shaped metal ring segment to synchronously contract radially and synchronously generate axial displacement, thus forming a self-tensioning clamp. This solves the problem of loose cable joints and uneven stress during the handover test caused by the inability of traditional fixing structures to adaptively clamp according to changes in cable tension.

The utility model discloses a mining child-mother type pipe joint which comprises a first pipe fitting and a second pipe fitting, one end of the first pipe fitting is fixedly connected with a male joint, one end of the second pipe fitting is fixedly connected with a female joint, the outer side of the female joint is fixedly sleeved with an inner pipe, the outer side of the inner pipe is provided with an outer pipe, and the outer pipe is fixedly connected with the male joint. A plurality of fixing pieces are fixedly connected between the inner pipe and the outer pipe, a plurality of supporting blocks are fixedly connected to the outer side wall of the female connector, grooves are formed in the supporting blocks, traction plates are arranged in the grooves, and the traction plates are rotationally connected with the inner walls of the grooves through torsional spring rotating shafts. According to the utility model, the male joint and the female joint are convenient to assemble and fix by adopting clamping and fixing, the on-site operation is simple, and the connecting device is suitable for popularization and application.

This utility model discloses a feeding device for NdFeB smelting raw materials, comprising a thin-walled barrel, a reinforcing frame, and a lifting clamp. The reinforcing frame is fixedly fitted onto the outer wall of the thin-walled barrel. At least two lifting holes are evenly distributed above the thin-walled barrel, and through holes corresponding to the lifting holes are formed on the reinforcing frame. The hook of the lifting clamp is movably engaged within the corresponding lifting holes and through holes. Beneficial effects: This utility model has a simple structure and is easy to implement, ensuring that the alloy raw materials fall stably and reliably into the smelting crucible, avoiding material waste, reducing production costs, and ensuring product quality.

This utility model discloses a new energy mobile air compressor, comprising a separate air compressor unit and a mobile battery unit. The air compressor unit mainly includes a mobile chassis, a screw air compressor, a drive motor, a motor controller, and various cooling systems. The air compressor unit is connected to the mobile battery unit via a pluggable integrated composite power supply cable. This cable integrates both high-voltage power supply cables and low-voltage control cables, enabling the transmission of high-voltage DC power and information communication and control between the devices. The mobile battery unit can be a dedicated mobile energy storage box or a new energy vehicle with external discharge capabilities. This design separates the power source from the main unit, improving the flexibility and convenience of equipment use.

The invention belongs to the technical field of capping beam construction, and particularly discloses a large-span door type capping beam construction technology which is used for a capping beam with the span larger than 50 m and comprises the steps that a vertical foundation support is assembled on an existing structure; a support is erected on the periphery of the existing structure, a supporting mechanism is arranged at the bottom of the support and forms a stress face, and when the supporting mechanism is stressed to rotate, bending moment force generated by concentrated stress in the supporting mechanism is released; integrally hoisting the pre-assembled steel truss to a preset bent cap; and layered pouring is conducted on the steel truss hoisted to the preset bent cap, so that bent cap construction is completed. The vertical support is directly arranged on the existing structure, so that the reliable transmission of the load of the upper structure is realized; through the arrangement of the supporting mechanism, flexible adjustment of the elevation of the support is achieved, and the construction efficiency is remarkably improved; through the free rotation effect of the stress surface, the bending moment is prevented from being transmitted to the foundation, the stress performance of the support is effectively improved, and the overall design of the steel support is further optimized.

The utility model discloses a mining hydraulic support withdrawing monitoring system. The mining hydraulic support withdrawing monitoring system comprises a first monitoring system and a second monitoring system, wherein the first monitoring system is arranged on a hydraulic support and used for monitoring the state of the hydraulic support in the withdrawing process of the hydraulic support; the second monitoring system is arranged on a worker and used for monitoring the state of the worker in the withdrawing process of the hydraulic support; the first monitoring system is connected with the second monitoring system and used for monitoring the operation state of the first monitoring system and the operation state of the second monitoring system; and the third monitoring system is used for monitoring the working area in the withdrawing process of the hydraulic support. According to the mining hydraulic support withdrawing monitoring system provided by the utility model, each withdrawing controller reports the state information of each support to the monitoring host by adopting a layered network topology structure, and the monitoring host performs remote centralized control on the premise of mastering various state data on site, so that the safety is improved.

This invention relates to the field of scour detection simulation of offshore wind turbine monopile foundations, specifically to a method for detecting the scour depth of offshore wind turbine monopile foundations based on a semi-analytical model. The method includes: establishing a pile-water-soil interaction model to obtain the dynamic control equations of the pile, water, and soil; analyzing the model boundary conditions; using Laplace transform to solve the control equations in the frequency domain to obtain solutions for pile displacement, seawater, and seabed potential functions containing unknowns; solving for the unknowns using the boundary conditions; obtaining the natural frequencies and mode shapes of the pile foundation at different scour depths; applying external excitation at the pile top in the field, then measuring the acceleration time history curves at different scour depths using pile acceleration sensors and vibration signal acquisition instruments, and then obtaining the natural frequencies of the pile-water-soil system through FFT transformation, which are then compared with the natural frequencies of the detection model to obtain the scour depth in the field.

The utility model relates to a connection change device for transformer. A connection change device for transformer comprises: a plurality of connection points, each connection point is connected with different coil tap in a plurality of coil taps of the high voltage side winding of transformer;A plurality of voltage equalizing balls, each voltage equalizing ball is configured to accommodate one of a plurality of connection nodes and is electrically connected with the corresponding connection point, so that the electric field around the corresponding connection point is homogenized;One or more connecting lines, each connecting line is configured to connect two connection points in a plurality of connection points via a corresponding voltage equalizing ball in a plurality of voltage equalizing balls, wherein the voltage that can be borne on the high voltage side winding of transformer is changed by changing the connection mode of one or more connecting lines and a plurality of connection points;And insulating oil is configured to immerse each connecting line and a plurality of voltage equalizing balls to insulate each connecting line and a plurality of voltage equalizing balls. Thus, the cost of connection change of transformer is significantly reduced.

The invention relates to a coaxial connector and a replaceable assembly thereof. The replaceable assembly comprises a cable, a second inner conductor and a middle connecting sleeve. The cable includes a first inner conductor and a first outer conductor. The first outer conductor is sleeved outside the first inner conductor and is insulated from the first inner conductor. And the second inner conductor is welded with the first inner conductor. The middle connecting sleeve is sleeved outside the first outer conductor and is electrically connected with the first outer conductor, and the middle connecting sleeve is detachably sleeved inside and fixed on the connector main body and is electrically connected with the connector main body. According to the coaxial connector and the replaceable assembly thereof, when maintenance is needed, the replaceable assembly is directly replaced, the connector main body is reserved and reused, and resource waste is reduced. The replaceable assembly is a standardized component, and in the field maintenance process, the replaceable assembly can be replaced, so that expensive field service time, travel cost and potential loss caused by improper maintenance can be saved.