53results about How to "Reduced risk of tripping" patented technology

The invention is suitable for an online digital state detection and monitoring technology of electric equipment, meanwhile belongs to the technical field of a million kilowatt nuclear power station, and provides a nuclear power station relay detection method. The method includes the following steps: conducting detection according to state of the nuclear power station relay, wherein the states of the relay can be a state before preparing a part, a state before usage, a state during operation, a failure state and an aging state. According to detected result, the relay is processed. The nuclear power station relay detection method conducts detection of the relay of different states, estimates reliability of the relay, lowers risks of trip and outage of a unit, and improves safety and reliability of operation of the nuclear power station.

An operating device with an operating piece, which may be positioned near the floor, includes at least one operating element for controlling a medical instrument. Operation of the medical instrument is possible by actuation of the at least one operating element by foot, such that the operator has hands free to use for further manipulation. A flexible positioning of the operating piece in a defined movement range is possible by arrangement of the operating device such as to be pivotable and / or extendable / retractable relative to the medical instrument which is good for operational manipulation. The operational device may be used during operation of a mammography device.

The invention is suitable for a power equipment online digital detection and monitoring technology, belongs to the key technical field of million-kilowatt nuclear plants, and provides a small fuse reliability detecting method for a nuclear plant. The method includes the following steps: detecting states of a fuse in the nuclear plant, wherein the states include an original state as a spare part, an original state before use, a state in operation, and a use state in fault analysis or aging analysis; and processing the fuse according to detection results. Through detection of different states of the fuse, reliability of the fuse can be assessed, the risk of reactor tripping and turbine tripping of units is reduced, and safety and reliability of operation of the nuclear plant are improved.

The invention relates to the technical field of turbines, and specifically relates to a turbine valve stroke measuring device and a turbine valve stroke monitoring system. The turbine valve stroke measuring device comprises a first LVDT (Linear Variable Differential Transformer) displacement sensor, a second LVDT displacement sensor and a third LVDT displacement sensor, wherein the first LVDT displacement sensor, the second LVDT displacement sensor and the third LVDT displacement sensor are connected with a leading-out rod of a turbine valve, the first LVDT displacement sensor is mounted at the side of an anti-rotation rod of the turbine valve, and the second LVDT displacement sensor and the third LVDT displacement sensor are mounted on a weld at the side of a LVDT connecting rod of the turbine valve in parallel. According to the turbine valve stroke measuring device disclosed by the invention, as a triple-redundancy structure of the LVDT displacement sensors is arranged, reliability of the LVDT displacement sensors of the turbine valve is improved, the problem on easiness for fracture of a LVDT displacement sensor at an adverse environment in the spot is solved, and meanwhile an out-of-control valve caused by failure of the LVDT displacement sensor is solved.

The invention provides a center hole sealing and locking apparatus for a tubing hanger of an underwater horizontal Christmas tree. The apparatus comprises an apparatus body internally provided with an apparatus body inner ring. A motivating ring is arranged in the apparatus body inner ring, a limit ring is arranged at the top potion of the apparatus body, and the limit ring can prevent the motivating ring from getting out of the apparatus body inner ring. The middle upper portion of the apparatus body is circumferentially and uniformly provided with multiple rectangular through holes, and each rectangular through hole is provided with a clamping tooth. The outer ring of the motivating ring is in contact with the inner walls of the clamping teeth in a matching manner. The motivating ring drives the clamping teeth to expand outwardly when the motivating ring moves downwardly. The motivating ring matches the clamping teeth and performs self-locking when the motivating ring downwardly moves to the bottom. The sealing and locking apparatus is simple in structure. By employing the apparatus, the difficulty of underwater operation is reduced, the time and cost for the underwater operation are saved, the time for installation and delivery operation is shortened, a replacing process for sealing members is simplified, the sealing success rate by one time is improved, and better sealing effects are achieved.

A Profiled rail system (1) serves for bridging expansion joints, cavities and as an edging of floor coverings(3). Said profiled rail system (1) has at least one web (9) aligned substantially parallel to said floor covering (3), which web (9) engages displaceably in a pocket (10). Said pocket (10) is formed by a cover plate (13) overlapping said web (9) and a base plate (14) underlapping said web (9). Said pocket (10) being configured in at least two parts (11, 12). A first part (11) forming said cover plate (13) and a second part (12) forming said base plate(14). Said first (11) and second part (12) are held together by holding means (18, 20). In a first embodiment said holding means (18, 20) contain at least one undercut web (20) for achieving a click connection. In a second embodiment said holding means (18, 20) contain at least one screw (18).

A base for a temporary barrier has a spigot or socket to receive a fencing pole or to cooperate with a plastics fencing panel. The base has a support portion of plastics material on which is provided the spigot or socket. A pair of stabilizing members of plastics material of low profile extending in opposite directions from the support portion. A stiffening member is connected to each stabilizing member and extends horizontally from adjacent the remote end of one stabilizing member to adjacent the remote end of the other stabilizing member. In one form a pair of metal tubes extend upwardly and are connected to a hollow metal portion through which the stiffening member passes. In another form, a plastics portion projects upwardly and defines a socket.

Disclosed is a four-foot walking stick capable of lowering stumbling risks of an old person. Four supporting feet extend out from four corners of a column foot plate outwards and include three fixed supporting feet and a movable supporting foot, and the movable supporting foot rotating around a vertical shaft on the column foot plate is arranged at the corner closest to the foot of the person and usually stops at a position butting against a retaining column under the action of a rotary spring. When the walking stick falls to the ground, because of geotropic gravity, the movable supporting foot can only move horizontally, and the walking stick can bear force from top to bottom; when the old person carries the walking stick to go forward, the foot of the old person with the body most instable kicks the movable supporting foot, at the moment, the movable supporting foot is free of ground friction, and accordingly, horizontal resistance of the movable supporting foot is insufficient to stumble the old person. Since a roller can be arranged at a grounding position of the movable supporting foot, except for time nodes when the old person is easy to stumble, when the four-foot walking stick is placed flat downwards and the old person kicks the movable supporting foot, friction force between the movable supporting foot and the ground can be decreased under the action of the roller, kicking resistance is also decreased, and further, the stumbling risks of the old person can be minimized maximally.

The invention relates to the technical field of power plant boiler system protection, in particular to a boiler critical flame protection maloperation prevention regulation and control system. The boiler critical flame protection maloperation prevention regulation and control system is characterized that the regulation and control system detects and obtains the number of flame signals of a main coal mill; the regulation and control system obtains operation data of adjacent coal mills of the main coal mill; the regulation and control system analyzes loss data of the flame signals of the main coal mill, and combines and analyzes the operation data of the adjacent coal mills of the main coal mill; and the regulation and control system performs analysis according to the data in the S3, judges the flame combustion condition in the main coal mill, and sends out an operation execution or tripping protection instruction according to the judged combustion condition. The system has the advantages that the shielding protection is performed before the flame of the coal mill loses protection, so that the judgment accuracy of the loss condition of flame signals of the main coal mill is further improved, and the condition of protection misoperation caused by transient loss of hearth flame due to coke falling can be shielded. Therefore, the unnecessary tripping risk is reduced, and the restarting consumption is reduced.

The invention relates to a method for operating a vehicle charging apparatus (22) for charging a vehicle battery (24). A particular line (VL1; VL2; VL3) on the decoupling point side is initially assigned to the first line (FL1; FL2; FL3) on the charging apparatus side by changing the charging current of a particular line (FL1; FL2; FL3) on the charging apparatus side and evaluating the line (VL1;VL2; VL3) on the decoupling point side in which a change can likewise be determined. This process is repeated for at least one second line (FL1; FL2; FL3) on the charging apparatus side.

The invention discloses a hinge quick disassembly lock-off adjusting device. The hinge quick disassembly lock-off adjusting device comprises a fixing base assembly and a base assembly, wherein an eccentric nut used for adjusting the left-right X horizontal position of a door sheet connecting plate is arranged at the bottom of a door plate connecting plate, the base assembly comprises a connectingrod shell and a middle adjusting block, the middle adjusting block is arranged on the connecting rod shell in a sleeve mode, an involute adjusting block used for adjusting the horizontal front-back Yposition of the middle adjusting block is arranged on the connecting face of the connecting rod shell and the middle adjusting block, an adjusting bolt is arranged on the connecting face of the connecting rod shell and the middle adjusting block in a penetrating mode and used for adjusting the up-down Z direction of the door sheet, the matching position of the involute adjusting block and the connecting rod shell is designed to be spherical, spherical matching carried out between the involute adjusting block and the connecting rod shell, three convex points are designed at the matching position of the middle adjusting block and the involute adjusting block to matches with an involute of the involute adjusting block, and the matching position is in plane contact. According to the hinge quick disassembly lock-off adjusting device, during adjustment in the X, Y and Z directions, parts do not deform forcibly, adjustment is smooth, a separation locking structure is more reliable, and the tripping risk is reduced.

The invention discloses a prefabricated office partition and an installation method thereof, which relate to the technical field of office decoration. The key points of the technical solution include an installation mechanism, a sliding mechanism, a support part and an upper frame, and the installation mechanism is installed indoors along its length direction. On the roof, the locking part is fixedly connected to the top of the installation mechanism, the sliding mechanism is slidably arranged on the installation mechanism, and the sliding mechanism can move along the extension direction of the installation mechanism, and the upper frame is arranged on the installation mechanism Below, two wallboards are arranged on the top of the support part, and the tops of the wallboards are arranged inside the upper frame. The invention is convenient for the position adjustment of the partition wall, does not need to be provided with ground slide rails, and can be fixed at any time. In addition, no screws are provided on the splicing surface of the boards, and the effect of subsequent spraying or coating is better.

The arm type water pump comprises a water pump body, a connecting end is fixedly connected to the outer surface of the left side of the water pump body, a through opening is formed in the right side of the connecting end, and a separate pumping mechanism is arranged on the outer surface of the left side of the connecting end; the separate pumping mechanism comprises a first connector, a second connector, an arc-shaped groove, a closing plate, a fixing piece, a fixed groove and a movable groove, the device can clean a through pipe under the condition of no shutdown by utilizing the separate pumping mechanism, the water pumping efficiency can be improved, the working time is shortened, the working efficiency is greatly improved, and the device is suitable for popularization and application. A user can conveniently adjust the length by utilizing the telescopic mechanism, so that the device can be suitable for water pits with different depths and is convenient to carry, the situation that the only ground is occupied due to the fact that the through pipe is long is avoided, the user can conveniently carry out other operation work beside the water pits, the risk that the user is stumbled is reduced, and the safety is improved.

A method and an elevator control unit (1000) for controlling a doorstep gap (11) at a landing floor of an elevator (100) and an elevator (100) are presented. The elevator (100) comprising an electriclinear motor (125) coupled to an elevator car (110), wherein the method comprises moving (72) the elevator car relative to a stator beam (130) of the electric linear motor at the landing floor for controlling the doorstep gap (11) at the landing floor.

The invention relates to the technical field of natural gas transportation, in particular to a natural gas field station gas transmission method, which is suitable for gas transmission control of gas supply branches in the filter area and metering area of ​​the field station. The low automation level of existing natural gas stations cannot guarantee the gas safety of downstream users, especially the faulty gas supply branch in the filtering area and the metering area cannot respond quickly to switch the branch and cause the gas supply branch to be shut down. The present invention proposes a A natural gas station gas transmission method, the method is based on self-diagnosis to improve the reliability of natural gas station gas transmission, specifically through real-time diagnosis of the health of the interlocking gas supply branch, based on the status of valves and transmitters on the gas supply branch. Judging whether to switch the gas supply branch can effectively shorten the reaction time required for the branch switching action after the gas supply branch is shut down and fails, thereby improving the redundancy level of the filtering and metering branch of the natural gas station, and improving the safety of the natural gas pipeline network operation sex and reliability.