35results about How to "Improve stability and safety performance" patented technology

The invention relates to a primary frequency regulation closed loop control method for a generator set. The method comprises steps: a frequency difference signal between an actual power grid frequency and a power grid standard frequency is acquired; whether the above frequency difference signal is out of a frequency regulation dead zone is judged, if the frequency difference signal exceeds the frequency regulation dead zone, the frequency difference signal is used to obtain a theoretical frequency regulation power according to a corresponding function between the frequency difference signal and a frequency regulation load, and the theoretical frequency regulation power and an instantaneous generator set power in the case of frequency regulation action are overlapped to obtain a power target value for the frequency regulation closed loop control; and the power target value and an actual generator set generation power form a PID closed-loop circuit, and a frequency regulation load instruction is outputted. The method of the invention can accurately control the generator set primary frequency regulation contribution rate, improve the generator set primary frequency regulation qualified rate, and improve the power grid stability and safety.

The invention discloses a vibration state control device and a vibration state control method thereof. The device comprises a digital processor, an isolator, a digital controller, a vibration driver, a vibration device, an acceleration sensor and a human-machine interface; the digital processor transmits a vibration control signal to the digital controller; the digital controller generates a drive signal and phase information thereof, and transmits the drive signal to the vibration driver; the vibration driver drives the vibration device to vibrate; the isolator is used for isolating strong and weak electricity of the digital processor and the digital controller; the acceleration sensor acquires an acceleration signal of the vibration device and inputs the acceleration signal to the digital processor; the digital controller transmits the phase information of the drive signal to the digital processor in a phase synchronous signal form; the digital processor performs phase discrimination on the two paths of input signals to obtain the vibration state of the vibration device; and when the working point of the vibration device is at the position of a resonance curve, the digital processor adjusts the vibration state and the working point of the vibration device. The device and the method have the advantage of efficiently and quickly controlling the vibration state.

The invention relates to the field of transfer equipment, in particular to a fragile plate fixable transfer device and an operation method thereof. The fragile plate fixable transfer device comprisesa base. A boss arranged in the length direction is fixed to the middle portion of the upper surface of the base in the width direction. The two side faces, parallel to the length direction of the base, of the boss are symmetrically and slidably connected with clamping groove seat. The two ends of the length direction of the boss are symmetrically provided with inward sunken U-shaped grooves. Lifting tubes are rotatably connected to the interiors of the U-shaped grooves of the two ends of the boss through fixed shafts. The upper end of each lifting tube is connected with an upper pressure headthrough an adjusting mechanism. The two ends of each clamping groove seat are connected with the corresponding lifting tube through linkage mechanisms. Screw rods I are rotatably connected to the positions, under the corresponding clamping groove seats, of the interior of the base through fixed shafts. The screw rods I are connected with the bottoms of the corresponding clamping groove seats through vibration reduction mechanisms. A transmission case is fixed to the base. The fragile plate fixable transfer device improves the stability and safety of fragile plates in the transfer process. Moreover, springs and coil springs achieve the damping and buffering effects. Thus, the fragile plate fixable transfer device protects the safety of the fragile plates better.

The invention discloses a cleaning device for processing bamboo chopsticks. The cleaning device includes a work table, the work table is provided with a transmission box, a water pump and a sliding base, the transmission box is internally provided with a motor, a motor shaft of the motor is fixedly sleeved with a rotary disc in a connected manner, the rotary disc is provided with a first rotatingshaft, the rotary disc is rotatably connected with a connecting rod through a first rotating shaft, the left end of the transmission box is provided with a guide tube, a guide block is slidably sleeved with a guide groove inside the guide tube in a connected manner, a second rotating shaft is arranged on the guide block, the guide block is rotatably connected to the connecting rod through the second rotating shaft, the left end of the guide block is provided with the sliding base, a cleaning box is slidably arranged above the sliding base, and a vibration motor is mounted on the cleaning box.A plurality of bamboo chopsticks and cleaning liquid in the cleaning box are driven by a left-and-right reciprocating transverse movement and up-and-down vibration movement locus, effective overall cleaning is achieved, the cleaning efficiency of the bamboo chopsticks is improved, and the stability and safety of up-and-down guide vibration of the cleaning box is improved.

The invention discloses a double-row multi-head copper foil winding device. The double-row multi-head copper foil winding device comprises a transmission mechanism, two parallel horizontal beam bodies, a driving motor and a rack positioned between the two horizontal beam bodies. The two horizontal beam bodies are respectively and fixedly provided with a plurality of copper foil winding machines atintervals. Each copper foil winding machine comprises a paying-off unit, a wrapping unit, a traction unit and a taking-up unit, wherein the paying-off unit, the traction unit and the taking-up unit are all installed on the rack. An output shaft of the driving motor is in transmission connection with the transmission mechanism, the driving motor respectively provides working driving force for themultiple copper foil winding machines through the transmission mechanism, and core wires released by the pay-off units on the copper foil winding machines are wrapped with copper foil through the wrapping units, pulled by the traction units and then wound on the take-up units. By arranging the multiple copper foil winding machines on the two side surfaces of the rack, the structural design of a single copper foil winding machine and the whole device are effectively simplified, the size is reduced, and the whole occupied space of the device is effectively reduced on the premise of ensuring thesame working efficiency.

The invention discloses an anchoring split arch bridge type protection slope structure used for protecting and reinforcing a natural slope or an artificial slope and a method for constructing and paving the same. The split arch bridge type protection slope structure is pressed into the slope surface, the downslide force of the slope surface is counteracted by the counterforce of an arch frame, and the protection slope structure is fixed to the slope in the form of setting an anchor rod at the same time, so that the anti-skid force of the slope is increased, the geologic hazards such as slope instability, debris flow and the like caused by shallow slope weathering, creeping, gradual slope deformation or washing of rainwater to slope flow are avoided, and the stability and the safety of the slope are improved; the overall structure comprises three parts, namely an arch bridge-shaped supporting body with double lugs, a supporting seat and an expansion anchor rod; the advantages of anchor rod reinforcement and grille slope protection are combined; the protection slope structure can be paved on the surface of the seriously weathered exposed slope or the new excavated and filled artificial slope so as to protect the slope surface, increase the anti-skid safety coefficient, lower the risk of geologic hazard and improve the integrity and the durability of the protection slope at the same time; and the protection slope structure is simple to pave and mount, light in weight, easy and convenient to operate and high in efficiency.

The invention relates to the technical field of advertisement mobile intelligent terminals, in particular to an LCD (liquid crystal display) advertisement mobile intelligent terminal with a safety storage component. The main body assembly comprises a walking base, a main body support, a first mounting frame, a second mounting frame, a splicing frame, an embedded clamping plate, a first rotating shaft, a controller, a distance reducing connecting rod and a follow-up rod, the main body support is fixed to the middle side of the upper end of the walking base through screws, and the first mounting frame is located on one side of one end of the main body support; wherein the second mounting frame is located on one side of the other end of the main body support, through the arrangement of the storage device fixing device, the position of the storage device can be limited under the action of the attaching pressing plate and the built-in plate, in this way, the storage device can be rapidly and stably fixed, and then the stability and safety of the storage device can be improved; and the storage device is effectively prevented from being damaged.

The invention discloses an automatic laying and fixed mounting device for a construction cable. The device comprises a machine body, wherein a working cavity with a forward opening is formed in the machine body; walking wheels are arranged at the bottom end of the working cavity; a fixed box is fixedly mounted on the inner wall of the top side of the working cavity; a fixed plate is fixedly mounted on the inner wall of the bottom side of the working cavity; a laying assembly for laying a cable is arranged in the working cavity; and the laying assembly comprises a displacement plate which is installed in the working cavity in a left-right sliding mode. When the device works, a cable on the winding shaft can be stabilized through the stable protection assembly, and the baffle is opened, thewinding shaft can be rotated through the laying assembly to lay a cable, the cable laid outside can be mounted on a wall through the mounting assembly, the workload of constructors is reduced, the stability and safety are improved, and the laying efficiency is improved.

The invention relates to the technical field of filters, in particular to a filter fixing connecting assembly with a self-locking structure. The assembly comprises a filter body, a mounting cover being arranged in the filter body, fixing columns being fixedly connected to the surface of the mounting cover, a top plate being fixedly connected to the top ends of the fixing columns, the fixing columns being in two groups, a lifting rod being inserted into the surface of the top plate, and a fixing ring being fixedly connected to the bottom end of the mounting cover; a magnetic suction cylinder, mounted on the inner bottom wall of the filter body, and a mounting bottom ring being arranged at the bottom end of the magnetic suction cylinder. According to the invention, when the two groups of magnetic suction rods are adsorbed into the magnetic suction cylinders. The device can realize a certain self-locking function, the problem that an existing connecting assembly cannot realize the self-locking function is solved, the stability of the filter during use is ensured, the mounting cover is automatically mounted on the surface of the filter body through the cooperation between the assemblies, and the connection stability is greatly improved.

The invention discloses an asphalt mixing station. The asphalt mixing station comprises a main building framework, wherein the main building framework comprises a closed cavity and particles loaded in the cavity, when the main building framework vibrates, friction or collision among the particles and between the particles and the cavity consumes the energy so as to attenuate the vibration of the main building framework. When the main building framework of the asphalt mixing station vibrates, the particles loaded in the cavity are driven to move, and the friction or collision among the particles and between the particles and the cavity consumes the vibration energy of the main building framework, so that the vibration energy of the main building framework is effectively released, and the stability and safety of the main building framework can be improved.

The invention discloses a big data type power grid control device comprising a box body; an inner chamber is fixed in the box body; side blocks are symmetrically fixed up-down on the right end wall ofthe inner chamber; a transfer chamber is fixed in the side block; a drive motor is fixed in the right end wall of the transfer chamber; a meshing gear is fixed on the left end face of the output shaft of the drive motor; a meshing gear is engaged above said meshing gear; a through rotating shaft is fixed in the meshing gear, and rotatably matched and connected with the right end wall of the transfer chamber; an open chamber located within the slide block is arranged on the left side of the transfer chamber; the through rotating shaft rotatably penetrates the transfer chamber and extends intothe open chamber. The big data type power grid control device is simple in structure, easy to use, and employs a machinery type control circuit system on/off mode to fast connect/disconnect two paths,thus providing very strong safety, and greatly improving the power system stability.

The invention discloses a pesticide sprayer with stably interconnected hanger brackets. The pesticide sprayer comprises a hanger bracket part and a balancing part arranged on the pesticide sprayer, wherein the hanger bracket part is divided into a hanger bracket main body and a hydraulic cylinder on a wheel; the balancing part comprises a whole lifting device and a left and right balancing device; the whole lifting device is semi-actively controlled to lift as a whole; the left and right balancing device is actively controlled left and right balancing device. According to the pesticide sprayer, hydraulic hanger brackets are interconnected, and the interconnected hanger brackets are controlled by using a balance sensor, so that an excavator can be always kept in an automatic balance state for operation on any rough terrain. The interconnected hanger brackets have the function of passively crosswise lifting for torsion elimination to adapt to the rough terrain, so that the condition that the excavator can quickly run on the rough terrain, does not bump too much, and does not incline all around is ensured; furthermore, when all wheels are prohibited or run on the rough terrain, the grounding force on the ground is always uniform, so that the work efficiency and the stability and the security performance of the excavator are greatly improved.