9results about How to "Realize online maintenance" patented technology

The invention belongs to the technical field of direct-current power supply system management, and provides an independent management method for a split type parallel direct-current power supply lithium battery of bidirectional DC / DC conversion, a direct-current power supply is of a movable structure, and the system architecture of the direct-current power supply comprises a central controller and a plurality of parallel power sub-modules, the method specifically comprises the following steps: a central controller identifies a newly added power sub-module and completes system architecture configuration based on acquired state parameters of existing power sub-modules and main bus operation state data; the central controller dynamically selects a control mode and generates an execution instruction of charging and discharging power based on the number and state parameters of the power sub-modules, and controls the charging and discharging of each power sub-module; on the premise of ensuring uninterrupted power supply of the direct-current power supply, the central controller controls the lithium battery pack in the power sub-module to perform online capacity checking or activation operation. According to the invention, plug-and-play and independent control of the power sub-modules are realized through modular design.

This utility model relates to the field of power electronics technology, specifically to a DC common bus current limiting and blocking device. It includes an energy storage converter and a DC bus terminal, with a blocking module disposed between the energy storage converter and the DC bus terminal. The blocking module includes multiple blocking units, and the energy storage converter is connected to the blocking units. The blocking units are connected in parallel to each other and connected to the DC bus terminal. This DC common bus current limiting and blocking device can achieve rapid current limiting and isolation when multiple energy storage converters are connected in parallel to the DC bus. It has high response speed and dynamic detection capability, and can effectively avoid the adverse effects of abnormal current caused by faulty equipment on other equipment.

This invention discloses a thermal energy storage system for pumping large-flow-rate high-temperature molten salt, relating to the fields of solar thermal power generation, nuclear power, and thermal power energy storage. It includes a main molten salt storage tank, a stabilizing tank, a horizontal storage tank, a main circulating molten salt pump, and a salt-reducing temperature-regulating pump. The main molten salt storage tank is connected to the stabilizing tank via multiple pipelines. The outlet of the stabilizing tank is directly connected to the suction inlet of the main circulating molten salt pump via a pipeline equipped with an isolation valve and an air cooler, stabilizing the pump suction flow and enabling large-flow-rate molten salt pumping. The arrangement of one or more pipelines between the main molten salt storage tank and the stabilizing tank reduces the height of unusable molten salt in the main molten salt storage tank, saving costs. An air cooler is installed after the stabilizing tank to ensure safe isolation during isolation valve maintenance. This invention addresses the need for pumping large-flow-rate high-temperature molten salt in solar thermal power plants or nuclear power plants of 350MW or above, while also adapting to the requirements of long-term, uninterrupted low-speed pump operation.

The present invention provides an electroplating wastewater treatment station, which comprises: a precipitation assembly, which comprises a precipitation box, a main precipitation cavity and a liquid outlet cavity are arranged in the precipitation box, and an inclined filtration module is mounted in the liquid outlet cavity; the neutralizing assembly comprises a neutralizing box, a stirring part is mounted in the neutralizing box, and an opening and closing part is mounted at the bottom of one side of the neutralizing box; the filtering mechanism comprises a filtering box, a filtering cloth shaping assembly and a defoaming assembly; an extrusion plate is horizontally and slidably mounted in the filter box, a filter cavity is formed in the inner side of the extrusion plate, a driving part is connected to the outer side of the extrusion plate, and filter cloth arranged in a V shape is mounted in the filter cavity. Through partition design, integration of filtration, clarification and impurity sedimentation is achieved, the filter cloth is arranged in a V shape, an operation area for rapidly replacing the filter cloth is adopted, meanwhile, the filter cloth is backwashed through the filter cloth shaping assembly, fine impurities in filter cloth holes are removed, online maintenance of the filter cloth is achieved, and the filter cloth does not need to be dismounted after shutdown.

A multi-output power supply device that can serve as a backup for each other includes: a control panel; an external communicator for communication between the control panel and the outside world; at least two power modules, all with identical circuit structures; each power module is independently connected to the control panel; each power module is connected to a first load and a second load respectively via two independent internal output contactors, thereby supplying power to the first and second loads; the control panel collects the operating status of each power module, thereby controlling all power modules to switch to either a branch output mode or a current sharing output mode. By setting up multiple completely independent DC power modules and independently controlling each DC power module, executing logical judgments and controlling the on / off state of each DC power module, automatic power supply switching to different loads is achieved, ensuring continuous power supply to the loads for extended periods and effectively preventing power interruptions.

The application discloses a railway freight car damping system replacement set, and belongs to the technical field of railway freight car damping system maintenance equipment. The set is composed of a self-locking hydraulic pick, a supporting tool, a positioning pin, a wire tightener, a portable electric hydraulic pump, a lifting protection device and a pillow spring fork, and the components are detachably connected through the positioning pin and an oil pipe. The supporting tool is symmetrically designed and is provided with a protruding block, cooperates with the self-locking device of the self-locking hydraulic pick and the wire tightener, and can avoid pick collapse during the jacking process; the lifting protection device comprises a first lifting protection device and a second lifting protection device, and provides safety protection at the highest jacking position and the lowest falling position of the bolster end head, respectively. The set can simultaneously complete pillow spring replacement and side frame column wear plate replacement, and can be used for on-line maintenance without removing the car, solves the problems of single function, narrow adaptation range, low maintenance efficiency and great safety hidden danger of the existing equipment, and is suitable for various types of railway freight car bogies.

This invention belongs to the field of flexible connection components for parabolic trough collectors and the technology of solar thermal power generation. It discloses a flexible connection planar rotary joint for high-temperature parabolic trough collectors, comprising: a shell, a first bushing, four first metal-edged wire-reinforced sealing rings, two second metal-edged wire-reinforced sealing rings, a sealing ring support, a hollow shaft, a sealing ring pressure ring, a second bushing, two anti-rotation pins, adjusting bolts, a threaded flange, injectable soft sealing filler, and three injection port sealing bolts. The shell serves as the base of the planar rotary joint, with three evenly distributed threaded injection ports on its circumference for connecting a one-way valve and a high-pressure injection gun to add injectable soft filler. After the sealing material is injected, the injection threads on the shell are plugged using the sealing bolts on the injection ports. The bushing is located at the bottom of the inner cavity of the shell, and a first set of sealing rings and a second set of sealing rings are respectively arranged on both sides of the injectable soft filler sealing cavity. The anti-rotation pins prevent the second bushing from rotating under the dry friction torque generated by the rotation of the hollow shaft.

The application discloses a semiconductor device and a process cavity maintenance method. The maintenance method comprises the following steps: providing a process cavity, a target film layer is deposited on the inner wall of the process cavity, and the target film layer is a semi-insulating oxygen-doped polysilicon film layer; a first gas is introduced into the process cavity, the target film layer is subjected to a first treatment, the target film layer is oxidized to form an oxidized target film layer, and the oxidized target film layer is cracked and peeled off under the action of stress, and the first gas is an oxidizing gas; and a second gas is introduced into the process cavity, and the process cavity is purged. The application can realize online maintenance of the process cavity, maintain the particle performance at a good level, has the advantages of simpler, more reliable, more efficient and faster maintenance, and can greatly reduce the labor cost and the material cost.

The application discloses a hot-state magnesia spinel brick surface coating and a preparation method thereof. The surface coating raw material comprises the following components in percentage by weight: aggregate system 40-70%, bonding system 28-50%, sintering aid 1-5%, and additive 1-5%; wherein the aggregate system comprises the following components in parts by weight: magnesia spinel brick regenerated powder 30-50 parts and functional fine powder 10-20 parts; and the bonding system comprises the following components in parts by weight: active alumina micro powder 10-20 parts, light-burned magnesium oxide powder 5-15 parts, and silicon micro powder 3-8 parts. The coating forms a firm chemical bonding interface, the bonding strength is significantly higher than that of a traditional normal-temperature coating, and the anti-peeling capacity is greatly improved; the waste brick is used as the raw material, the cost is reduced, the recycling economic concept is met, the brick life is prolonged, the replacement frequency is reduced, and energy and cost are saved.