47results about How to "Meet the needs of actual working conditions" patented technology

The invention discloses a non-invasive load identification method and device. The method comprises the steps of finding out a transient stage of a time sequence according to an obtained time sequenceat a power supply inlet, wherein the time sequence comprises an active power time sequence, a reactive power time sequence and a current time sequence; extracting load identification characteristic quantities at the transient stage according to the electric energy data at the power supply inlet, wherein the electric energy data include voltage, current and power, and the load identification characteristic quantities include steady-state power increment, active power characteristics, harmonic current increment and load time characteristics; and determining a load type according to the load identification characteristic quantities and a preset load library, wherein the preset load library has a corresponding relationship between the load identification characteristic quantities and the loadtype. According to the invention, the technical problems of limited steady-state characteristics and relatively low identification accuracy under the condition of complex actual working conditions ofexisting non-intrusive load identification are solved.

The invention discloses a step-like belt conveyor. The step-like belt conveyor comprises a support, conveying rollers and a belt; the conveying rollers are arranged on the support; the belt is laid on the conveying rollers; the support comprises a flat plate and supporting feet; the flat plate comprises a horizontal segment and an inclined segment; a gap is formed between the horizontal segment and the inclined segment; the two ends of the gap are connected through connection shaft bases; the horizontal centers of the connection shaft bases and the horizontal center of the flat plate are kept at the same height; bearings are arranged in the connection shaft bases in a sleeved manner; a connection shaft is arranged at the two ends of each conveying roller; the connection shafts are arranged in the bearings in a sleeved manner; a pressing roller base and a pressing roller are arranged at the head end of the inclined segment; and the pressing roller is connected to the pressing roller base in a rotating manner. Due to the adoption of the above device, the requirement of conveying of an inclined channel is met, the structure is simple, design is reasonable, and the work efficiency is improved.

The invention relates to a vacuum pump providing vacuum assisting power for an automobile braking master pump and aims to provide a horizontally-opposite diaphragm type electric vacuum pump which is small in size, large in exhaust amount and convenient to machine. The horizontally-opposite diaphragm type electric vacuum pump comprises a fixed support, a motor and a pump body. Two eccentric cranks which are horizontally arranged in the left and right direction are installed on a motor shaft in the pump body and connected with connecting rods. The other ends of the connecting rods are connected with diaphragm assemblies which are wrapped in diaphragms. The edges of the diaphragms are fixed to the pump body. End covers are installed at the two ends of the pump body. A sealed work cavity is formed between each diaphragm and the corresponding end cover. Two sets of installing holes are machined in the inner side of each end cover, and each upper installing hole and each lower installing hole are provided with an air inflow valve and an air outflow valve respectively. Each air inflow valve and the corresponding air outflow valve are communicated with an air inflow channel and an air outflow channel respectively. Each air inflow channel is connected with an air outflow pipeline. The air outflow channels are communicated with the interior of the pump body. An exhaust port is formed in the upper portion of the pump body.

The invention belongs to the technical field of composite material preparation, and discloses a preparation method of an extrusion roller. The preparation method comprises the steps of adding ceramicparticles and metal powder with the volume ratio being 3:1-5 into powder mixing equipment to be sufficiently mixed; adding an adhesive into the mixed powder according to the mass ratio being 3%-8%, stirring the mixture to be uniform and adding the mixture into a stud preform forming die, and obtaining a formed stud ceramic preform through heating and curing; fixing the obtained stud ceramic preform into a die-casting die, performing preheating, casting high-temperature molten metal, setting certain pressure and the certain die-casting speed, maintaining pressure, and performing pressure casting to obtain a composite material stud; fixing the obtained composite material stud into a centrifuge die, performing preheating, starting a centrifuge, injecting molten metal into a die cavity, and after cooling, falling sand to obtain the composite material stud extrusion roller. The pressure casting infiltration technology and the centrifugal casting technology are combined to prepare the ceramic reinforced metal matrix composite material stud extrusion roller.

The invention relates to a cable placement frame comprising a placement frame body and a placement box arranged on the placement frame body. The placement frame body is composed of two wooden bars arranged in parallel. The wooden bars are each provided with at least four first threaded holes, and the inner sides of the wooden bars are provided with square through holes. The placement box is composed of a fixed sleeve and fixed brackets which are fixedly connected to the upper and lower ends of the fixed sleeve. Fixed bumps extend from the two ends of each fixed bracket respectively, and each fixed bump is provided with a second threaded hole. The fixed sleeve is internally provided with at least six cable holes which are circular, wherein the centers of five cable holes are on the same circumference, and the other cable hole is arranged in the middle of the five cable holes. The cable placement frame has a simple structure and a beautiful shape. With the cable placement frame, cables can be placed properly and gathered together to save space. Moreover, the cable placement frame is of lower friction, and has a longer service life.

The invention relates to an acousto-optic bird repelling device and an application method. Common acousto-optic bird repellent devices installed on collecting power lines in a wind farm are found obvious deficiencies in applications, including the fact that a glass reflector can not rotate in absence of wind, resulting in failure to effectively repel birds only by an acoustic bird repelling device. The acousto-optic bird repelling device of the present invention is composed of a base (7), a supporting rod (8) fixed above the base, a connecting sleeve (10) sleeved in the middle of the supporting rod, a sound generator device (5) connected to one side of the connecting sleeve through a connecting rod, a mirror bracket body (3) fixed above the supporting rod, a permanent magnet motor (4) connected above the mirror bracket body through bolts, an inner ring of a bearing is mounted on the output shaft of the permanent magnet motor, and a reflector device (1) connected to an outer ring of thebearing. The sound generator device is of a box structure, and internally provided with a sound generator, a control system and a storage battery (11) in sequence. A solar panel is installed on the front end surface of the box structure. The invention is used for the acousto-optic bird repelling device.

The invention provides a control method for a counter-rotating movable blade adjustable axial flow fan which comprises a first fan unit and a second fan unit. The control method comprises the following steps: acquiring a first function between optimization target performance of a fan and working state parameters of the fan; acquiring a second function between comprehensive performance of the fan and comprehensive state parameters of the fan; obtaining an actual comprehensive state of the fan under a working condition according to the actual working state parameters of the fan under the working condition and the second function; judging whether the actual comprehensive state of the fan meets actual requirements or not, and adjusting the actual working state parameters of the fan until the comprehensive working state of the fan meets the actual requirements if the actual comprehensive state of the fan does not meet the actual requirements; obtaining actual performance of the fan according to the final actual working state parameters of the fan and the first function; judging whether the actual performance of the fan meets the optimal performance state of the fan or not, and adjusting the actual working state parameters of the fan until the actual performance of the fan meets the optimal performance state of the fan if the actual performance of the fan does not meet the optimal performance state of the fan.

The present invention relates to a reciprocating speed adaptive pulse injection device, and belongs to dust removal devices. A hole plate has a plurality of holes, each hole is connected to a filter bag, both left and right guide rails are steel I-beams and fixed on two sides of the hole plate; the left and right rails each has a corresponding mobile platform, the left and right mobile platforms are connected by a horizontal injection tube; an outlet end of the horizontal injection tube is perpendicular to the mouth of the filter bag; an inlet end of the horizontal injection tube is connected to the outlet end of an electromagnetic pulse valve; the inlet end of the electromagnetic pulse valve is connected to a high pressure gas tank by a high-temperature resistant high-pressure gas pipeline; the high pressure gas tank is connected to the front end of the hole plate; an electric induction front panel is connected to the front end of the hole plate, an electric induction back panel is connected to the back end of the hole plate, an electric induction side panel is connected to the side edge of the hole plate, and all the three induction panels are used to reflect the location information of the horizontal injection tube; and a control device is connected to the left mobile platform. The present pulse injection device has advantages of simple structure and high reliability.

The invention relates to a method for DPF regeneration heat protection, comprising the steps of: collecting intake air flow signal, differential pressure signal, DPF inlet temperature signal, SCR inlet temperature signal, neutral switch signal, handbrake signal, throttle signal, brake signal; detecting whether the DPF In the regeneration state, if it is in the regeneration state, check whether the regeneration heat protection is passed; if it passes, stop DPF regeneration, and then enter the regeneration heat protection mode; detect whether the regeneration heat protection exit judgment is passed, if passed, exit the regeneration heat protection model. The invention provides corresponding judgment conditions for the entry and exit of regenerative heat protection under different working conditions, which is more suitable for actual working conditions; the regenerative heat protection modes are classified, and the automatic switch between different types of modes is designed conditions, and can flexibly respond to changes in working conditions.

The invention relates to an air release valve with a detachable valve body and a manufacturing method thereof. The air release valve with the detachable valve body comprises the valve body; end flanges are arranged at inlet and outlet ends of the valve body and used for connecting with a pipeline; the top of the valve body is provided with a middle flange; the valve body is composed of two symmetrical half-valve bodies that are butted and fixed; a sealing gasket is arranged between the two half-valve bodies; the shape of the sealing gasket is matched with the shape of the contact faces of thetwo half-valve bodies; the two half-valve bodies are fixed by hoops at the two end flanges and a hoop at the middle flange; positioning plates are welded to the bottoms of the two half-valve bodies; and the two positioning plates are in screw connection. The air release valve with the detachable valve body is convenient to disassemble, so that washing condition is easy to observe, and under the working condition, the washing condition of other valves in actual working is evaluated; parts can be replaced in time; when slag is accumulated in the valve body of the valve, the valve body can be disassembled for cleaning; when a fluid experiment is carried out, the experiment condition of the structure can be observed more visually so that the experiment cost is greatly reduced; the experiment can be repeatedly carried out; and the wall thickness data can be collected during the subsequent flush experiment.

The invention belongs to the technical field of composite material preparation, and discloses a preparation method of an extrusion roller, which comprises: adding ceramic particles and metal powder to a powder mixing device at a volume ratio of 3:1-5 and fully mixing them; Add adhesive to the body according to the mass ratio of 3%-8%, stir evenly and add it to the stud preform forming mold, and obtain the shaped stud ceramic preform by heating and curing; fix the obtained stud ceramic preform to the die-casting Preheat in the mold, cast high-temperature molten metal, set a certain pressure and die-casting speed and keep the pressure, pressure cast and infiltrate to get composite studs; fix the obtained composite studs into the centrifuge mold and preheat, open The centrifuge injects the molten metal into the cavity of the mold, and after cooling, sand falls to obtain a composite stud extrusion roller. The invention combines the pressure casting infiltration technology and the centrifugal casting technology to prepare a ceramic reinforced metal matrix composite stud extrusion roller.

This application relates to the field of injection molds, in particular to a three-color push and turn automatic molding mechanism. The main points of its technical solution are: including plate A, plate B, top core rotating assembly and rotating insert; plate A and plate B are opposite to each other, and there are first molding parts, second molding parts and The third molding part; the rotating insert is located between plate A and plate B, the rotating insert is provided with a fixed glue position insert, the first molding part and the fixed glue position insert are spliced ​​to form the first cavity, and the second The splicing of the molded part and the fixed glue position insert forms the second cavity, and the splicing of the third molded part and the fixed glue position insert forms the third cavity; the rotating insert is connected with the top core rotation assembly, and the top core rotation assembly It is used to drive the rotary insert closer to or farther away from the B plate, and the top core rotary assembly is used to drive the rotary insert to rotate. This application has the effect of improving the defect of long production cycle in the production process of three-color parts.