11results about How to "Control security" patented technology

The invention relates to a water-rich soft soil stratum deep foundation pit dewatering excavation coupling analysis method. The method comprises the steps that an SOIL module on a large-scale commercial finite element software ABAQUS calculation platform is used, a Biot consolidation control equation is adopted to describe the coupling effect of soft soil stress-pore unsteady flow under foundation pit dewatering excavation, a finite element model is established, and in combination with field monitoring experience of foundation pit excavation construction on an adjacent environment influence range, an in-pit dewatering mode is adopted to determine the soft soil stress-pore unsteady flow coupling effect under foundation pit dewatering excavation. The calculation time and the calculation precision are comprehensively considered, and step-by-step refined simulation in the foundation pit construction process is achieved. According to the method, the fluid-solid coupling effect in the dewatering excavation process of the deep foundation pit in the water-rich soft soil stratum can be accurately simulated, the influence of foundation pit excavation on the surrounding environment is effectively predicted, and the engineering safety and reliability are improved.

A soft starter with thyristor triggered abnormal protection comprises a microprocessor, a thyristor drive circuit and a fault detection circuit, wherein the input end of the thyristor drive circuit is connected to the microprocessor for receiving a trigger signal sent by the microprocessor, the output end of the thyristor drive circuit is connected to a three-phase asynchronous motor 3M for driving the three-phase asynchronous motor 3M to start, and the input end and the output end of the fault detection circuit are respectively connected to the thyristor drive circuit and the microprocessor for detecting whether the thyristor component of the thyristor drive circuit is turned on and feeding back to the microprocessor. The present invention forms a closed-loop control system with a thyristor triggered abnormal protection function by arranging a fault detection circuit with a feedback function in the soft starter, which enables the microprocessor to detect whether the thyristor component of the thyristor drive circuit is turned on according to the feedback information of the fault detection circuit, thereby protecting the safety of the circuit.

The invention relates to a system and a process for continuously preparing 3-(methylsulfonyl) propionic acid. The system comprises a feeding unit and a discharging unit, wherein the feeding unit comprises an acrylic acid continuous supply device, a sodium methyl mercaptide solution and sodium hydroxide solution mixed solution continuous supply device and an oxidizing agent continuous supply device; according to the system for continuously preparing the 3-(methylsulfonyl) propionic acid, provided by the invention, by using the continuous micro-channel reactor, rapid conversion and relatively high conversion rate of materials in addition reaction and oxidation reaction are realized; the safety of the oxidation reaction is effectively controlled, the liquid holdup is small, and the intrinsic safety of the oxidation reaction is reduced through the continuous reaction; by using the continuous extraction device, higher extraction efficiency is realized, the generation of three wastes is reduced, and higher yield is realized.

The present invention relates to the technical field of automatic unhooking devices, specifically to an automatic unhooking device based on offshore hoisting and a method thereof. It includes an upper hoisting platform, a lower hanger and a hook platform, and also includes a group of guide rods installed between the upper hoisting platform and the lower hanger, each guide rod is sleeved with a limit spring corresponding to the position between the lower hanger and the hook platform, and a rotating shaft is rotatably connected to the inner surface of the hook platform. The rotating shaft is driven by a rotation motor, and a C-shaped ring is installed on the rotating shaft. Two locking gears are installed on the rotating shaft, and locking tooth plates are installed on the lower hanger at positions corresponding to the two locking gears. The beneficial effects of the present invention are: when the device is used, on the one hand, it can use electric control and gravity control methods to improve the safety of the unhooking device in the hoisting state in a multi-effect manner, and on the other hand, it can multi-effect control the safety of the cargo when the unhooking device is unhooked.

The invention provides a one-address multi-household inspection method for a power system, and belongs to the technical field of power system analysis. Comprising the steps of obtaining user information of all high-voltage users and industrial users of a target power supply unit; formatting the power utilization addresses of all users into standard addresses according to the standard names of administrative divisions and roads in the jurisdiction of the target power supply unit; grouping all the users according to the user names, the taxpayer identification numbers and the contact phone numbers, and determining the groups with the user number greater than 1 as a first group, a second group and a third group; fusing all the first groups, all the second groups and all the third groups into a to-be-checked group list; performing clustering analysis on each group in the to-be-checked group list according to the power utilization address, and splitting the corresponding group into new groups according to a clustering result; and traversing the group with more than one user number in the to-be-checked group list, and judging whether the group has a one-address multi-user condition or not according to a one-address multi-user rule.

The utility model discloses a galvanization passivator dispenser capable of adjusting dispensing quantity, which belongs to the technical field of galvanization passivator dispensing, and is characterized in that the galvanization passivator dispenser comprises a support shell, the inner side of the support shell is fixedly connected with a storage mechanism, and the top of the storage mechanism is fixedly connected with a quantifying mechanism; a liquid inlet pipe in the storage mechanism is fixed to the top of an agent storage tank, zinc plating passivating agents can be conveniently supplemented into the agent storage tank, impurities and the like can be effectively prevented from entering the tank through a top liquid inlet mode, the passivating agents in the agent storage tank can be conveniently discharged through arrangement of a liquid discharging pipe and a liquid discharging pipe, a one-way valve is used in cooperation, the liquid discharging process can be controlled to be smooth and safe, and operation is convenient. The quantitative mechanism can accurately measure the flow of the galvanization passivating agent in real time through an electromagnetic flowmeter, and can accurately control the work of the infusion pump according to set parameters in combination with a PLC (Programmable Logic Controller), so that the precise adjustment of the feeding amount of the galvanization passivating agent is realized, the consistency of the feeding amount every time is ensured, and the stability of the quality of a galvanization product is improved.

The present invention discloses a new method for reconstructing a flood discharge system in a used tailings pond. The reconstructed flood discharge system is composed of a steel blade angle caisson (1), a stilling well (4), a pile foundation (6), an annular cap (7), and a new flood discharge well (8); the stilling well (4) is dug down in layers in the steel blade angle caisson (1), and a reinforced concrete wall is cast to form a net circular section; the pile foundation (6) is arranged in a circular ring shape on the periphery of the steel blade angle caisson (1); the annular cap (7) is cast and supported on the pile foundation (6); and the new flood discharge well (8) is constructed and supported on the annular cap (7). The present invention utilizes the caisson to transform the original drainage culvert, which can effectively shorten the construction period and reduce the construction cost. It can not only meet the normal tailing discharge requirements of the tailings pond, but also ensure the need for flood discharge in the heavy rainfall season, and has good economic benefits.

The present invention provides a foundation pit support structure and a construction method thereof, wherein the foundation pit support structure comprises: a foundation pit, prefabricated support piles and steel supports. The prefabricated support piles are arranged around the side wall of the foundation pit, and a first bottom plate and a second bottom plate are arranged in the foundation pit, wherein the first bottom plate is located on the inner side of the prefabricated support piles, and the second bottom plate is located on the side of the first bottom plate away from the prefabricated support piles, and a plurality of anchor bars arranged in a horizontal direction are pre-buried in the second bottom plate, and the ends of the anchor bars extend to the top of the first bottom plate and are connected with anchor plates; a steel sleeve is pre-fabricated at the elevation corresponding to the second bottom plate on the prefabricated support piles, and a waist beam is arranged on the steel sleeve, and a steel plate is pre-buried on the side of the waist beam facing the anchor plate; the two ends of the steel support are respectively supported between the steel plate and the anchor plate. The foundation pit support structure is reasonably designed, economical and applicable, can effectively utilize the site space, increase the excavation space, and speed up the construction period, and can meet the requirements of ensuring the safety of the foundation pit project, controlling the deformation of the surrounding environment of the foundation pit, and facilitating the construction of the project during the excavation of the foundation pit.

The present invention provides a speed-torque closed-loop control system and method for a motor test system, wherein a set speed value is input into a rate limiter and a mode selector, a speed / torque signal output from the mode selector is filtered in a filter, the speed / torque is conditioned, a set speed / torque value is output from the rate limiter, the rising or falling slope of the speed / torque of the set speed / torque value is limited, the conditioned speed / torque signal obtained enters an integrator for speed / torque integration, and a reference speed / torque value of a drive motor is output, thereby effectively improving the test control accuracy, energy feedback efficiency, and system working stability requirements of a dual-motor electric closed-loop test system for a motor working control mode, thereby ensuring that the speed and torque control accuracy are improved in a transmission powertrain test, thereby ensuring the accuracy and reliability of the test results.

The present invention discloses an intelligent control system and method for the horizontal rotation angular velocity of a bridge based on a pull-rope displacement meter, comprising: a lower turntable; an upper turntable with a ball joint, a traction rope wound on the upper turntable; the pull-rope displacement meter is fixed on the lower turntable through a fixed bracket, the free end of the pull rope is fixed on the upper turntable, and the positions of the pull-rope displacement meter and the pull rope are on the same horizontal line; a pull-rope displacement meter monitoring module, which is connected to the pull-rope displacement meter and is used to collect the rotation displacement L of the upper turntable measured by the pull-rope displacement meter and convert it into a rotation angle, a rotation angular velocity, and a rotation angular acceleration; a tensioning jack, which is installed on the upper turntable and is used to tension the traction rope wound on the upper turntable, thereby driving the rotating bridge to rotate; a tensioning jack control system, which is connected to the tensioning jack; and a central control integrated system, which is connected to the pull-rope displacement meter monitoring module and the tensioning jack control system. The present invention can timely, accurately and efficiently transmit bridge rotation data.