93results about How to "Easy to maintain on site" patented technology

The invention discloses a fixed-value adaptive voltage and current time type on-site feeder automation method, which is characterized in that a transformer substation outlet circuit breaker is configured with delayed quick disconnection protection and one-shot reclosing functions, and a switch along a feeder adopts a circuit breaker. According to the method disclosed by the invention, fault positioning and isolation of a multi-branch multi-linked power distribution network through a mode of outlet one-short reclosing, overcurrent delay tripping, closing overcurrent quick breaking and short-time power recovery tripping and by being combined with an interphase short circuit/single-phase grounding transient characteristic fault detection technology and matched with one-shot reclosing of the transformer substation outlet circuit breaker.

The invention discloses a converter. The converter comprises a rectifier module, an inversion module, an electric quantity detecting circuit and a control circuit, wherein the rectifier module is used for converting input first alternating current into first direct current and outputting the direct current, the inversion module is connected with the rectifier module and is used for converting the first direct current output by the rectifier module into second alternating current and outputting the second alternating current, the electric quantity detecting circuit is connected with the rectifier module and the inversion module and is used for detecting the electric quantity information of the rectifier module and the electric quantity information of the inversion module, and the control circuit is connected with the rectifier module, the inversion module and the electric quantity detecting circuit and is used for controlling the rectifier module according to a rectification signal generated by the received electric quantity information of the rectifier module and controlling the inversion module according to an inversion control signal generated by the electric quantity information of the inversion module. According to the converter, the integration level is high; due to the fact that the control circuit is integrated inside the converter and an extra control unit is not needed, the connection method is simplified, and the failure rate of the converter is reduced.

The invention discloses a proximity switch speed measuring instrument which comprises an approximation ring which sleeves the output shaft of a measured motor, the approximation ring is provided with a plurality of uniformly distributed gaps. The side of the motor is provided with an approximation switch. The distance between the outermost ring of the approximation ring and the approximation switch is a sensing distance. The approximation switch can sense the outermost ring of the approximation ring and can not sense the gaps. With the rotation of the approximation switch, a pulse signal which represents the rotation speed is generated, according to the pulse signal read in a switch unit time, the mechanical rotation speed of a speed reducer output end flange is calculated, the rapid, convenient, and accurate detection of the mechanical rotation speed of the speed reducer output end flange and the line speed from flange output to a connection roller way can be realized, and a precise data parameter is provided for a control system.

The invention discloses a hydraulic push-return impact oscillator, comprising an upper connector, a barrel and a lower connector connected in a threaded manner sequentially from top to bottom. A diversion assembly, a reciprocating drive assembly and a backpressure valve assembly are nested in the barrel. The diversion assembly comprises a guide sleeve, an upper valve block, a valve block, a lower valve block and a distribution plate. The reciprocating drive assembly comprises a drive piston and a reversing valve. The backpressure valve assembly comprises a backpressure valve head, a backpressure valve block and a discharge sleeve. Pumped high-pressure liquid is in the oscillator and diverted by the diversion assembly to provide hydraulic drive horsepower for the reciprocating drive assembly, the reversing valve controls the drive piston to finish an upper stroke and a lower stroke, the drive piston also drives the backpressure valve head to reciprocate, the backpressure valve head periodically opens or closes the backpressure valve block so as to enable a pulse backpressure-relief process in a string, the drive piston will impact on the upper valve block or the lower valve block at the end of each stroke, and therefore, periodical mechanical impact is generated.

The invention discloses an automatic calibration device for dust concentration on-line monitoring, comprising a calibration frame and a calibration unit arranged on the calibration frame in a manner of being capable of transversely moving, wherein the calibration frame is provided with a light emitting port and a light receiving port, the transversely moving positions of the calibration unit comprise a calibration position and a measurement calibration; when the calibration unit is located in the measurement position, a light ray emits to an area to be measured through the light emitting port to generate scattering, and scattered light returns back through the light receiving port for measuring; when the calibration unit is located in the calibration position, the light ray emits onto the calibration unit to generate refraction and returns back for calibration; the device is simple and compact in structure, the calibration unit is mounted on the calibration frame and can realize transverse movement for switching between the calibration position and the measurement position to realize automatic calibration, the manual operations are reduced, and the accuracy and the stability of calibration are ensured; the device can work independently, the factory debugging of the calibration unit is facilitated, and the device has the characteristic of being convenient in on-site maintenance.

The invention discloses an in situ nutrient salt automatic analysis device for seawater monitoring. The device includes a first colorimetric structure (4.1) for ammonia nitrogen detection, a second colorimetric structure (4.2) for phosphate detection, a third colorimetric structure (4.3) for nitrite detection and a fourth colorimetric structure (4.4) for nitrate detection. A branch of a sample introduction and liquid discharge channel (1) is connected to a multiport valve (2), a syringe (3) is connected to the multiport valve (2), and the syringe and the multiport valve are in two-way setting. The device also includes a reagent unit, which comprises a plurality of reagent bags (5) connected to the multiport valve (2). Another branch of the sample introduction and liquid discharge channel (1) is connected to the fourth colorimetric structure (4.4), and the inlet of the fourth colorimetric structure (4.4) is equipped with a peristaltic pump (7). A xenon lamp (8) and a spectrometer (9) are arranged beside the fourth colorimetric structure (4.4), and the outlet of the fourth colorimetric structure (4.4) is connected to the sample introduction and liquid discharge channel (1). The in situ nutrient salt automatic analysis device provided by the invention has the advantages of easy cleaning and accurate detection.

The invention discloses integral 5D film equipment which comprises a host, a 3D projector and a stereo. The 3D projector and the stereo are connected with the host. The integral 5D film equipment further comprises an arc-shaped screen arranged in front of the 3D projector. A 3D seat platform is arranged below the position between the arc-shaped screen and the 3D projector. A 3D seat platform control box and a special effect control box which are in communication with the host are further included. The special effect control box comprises a box body and a control circuit arranged in the box body, and a communication circuit connected with the control circuit, a power circuit and drive output ends are further included. The drive output ends are arranged on the surface of the upper end of the special effect control box. A plurality of special effect devices connected with the special effect control box are further included. The special effect devices are controlled by the special effect control box in a centralized mode, circuits are reduced, and mounting and site maintenance are easy. The detachable connecting structure of a three-pin jack and a three-pin plug is further adopted, cost is low, and dismounting and mounting are easy. A resistance ruler is further adopted, control precision can be improved, and the production cost of the overall equipment can be lowered.

The invention discloses a laminated bus bar comprising a first outer-layer insulating layer, a second outer-layer insulating layer, an anode conductor, an intermediate insulating layer and a cathode conductor, wherein two sides of the intermediate insulating layer are respectively provided with the first outer-layer insulating layer and the second outer-layer insulating layer; the anode conductor is arranged between the first outer-layer insulating layer and the intermediate insulating layer; and the cathode conductor is arranged between the second outer-layer insulating layer and the intermediate insulating layer. The invention has low-inductance coefficient and compact structure, utilizes spaces effectively, is capable of controlling the system temperature, has least resistance and pressure drop, reduces damage to components by voltage peak and prolongs the service life of electronic elements.

The invention provides an auxiliary power supply system and an electric locomotive. The auxiliary power supply system comprises an auxiliary current transformer assembly and a filtering circuit assembly. The auxiliary current transformer assembly comprises an auxiliary control unit and an auxiliary power unit which are mutually connected. The auxiliary control unit is used for generating control signals of the auxiliary power unit according to set algorithm to control the auxiliary power unit to output pulse signals with set width. The filtering circuit assembly comprises a transformer, a capacitor and an electro-magnetic interference (EMI) filter which are sequentially connected. The auxiliary power unit is connected with the transformer. The filtering circuit assembly is used for filtering harmonic wave in the pulse signals. The power supply system can output sine-wave voltage signals to provide a stable voltage source for load, reduce electromagnetic interference of harmonic wave in the signals on peripheral communication devices and electronic devices and reduce effect of the harmonic wave on the load.

The invention provides a method and system for dynamic wireless charging and monitoring of an expressway. The method comprises the following steps that S1, all charging units located in a charging area receive charging trigger signals emitted by an electric vehicle in the driving process separately; S2, all the charging units generate corresponding signal strength information according to the strength sizes of the detected charging trigger signals respectively, and the signal strength information is sent to a section control device of the corresponding charging area; S3, the section control device detects all the signal strength information; S4, when it is detected that the signal strength information of one charging unit is lower than a first preset trigger strength value, it is determined that the electric vehicle does not drive into a charging range of the charging unit, and the close state of a wireless charger of the charging unit is kept. The system has the advantages of being high in degree of intelligence, low in cost, good in energy conservation, convenient to monitor and maintain and small in impact coefficient on traffic management.

The invention discloses a simple leveling worktable used for electric spindle drilling. The worktable comprises a leveling plate and a supporting plate; a base is arranged on the upper surface of theleveling plate and used for mounting of a radiator, the radiator is connected with a fixed clamp through a cushion block, supporting shafts which are in left and right symmetry are arranged on one endof the leveling plate and one end of the supporting plate, knuckle bearing supporting shafts are arranged in the middles of the other ends, knuckle bearing bases are arranged at the upper ends of theknuckle bearing supporting shafts and are used for mounting of knuckle bearings, and the knuckle bearing bases are connected with the leveling plate. Through arrangement of two compression structuresand one knuckle bearing supporting shaft, electric spindle drilling leveling problem can be solved.

The invention discloses meteorological multi-parameter monitoring equipment based on a Loongson 1D processor. The equipment comprises a fixing support. A single-hole base is mounted at the upper partof the fixed bracket. The upper part of the single-hole base is sequentially connected with a middle ring, a double-hole base and a bottom cover from bottom to top through screws. The bottom cover isconnected with the lower portion of the reflecting surface seat through screws. The upper portion of the reflecting surface seat is connected with the lower portion of the sensor fixing seat through avertical connecting column. The connecting column comprises a threading column and three supporting columns, the threading column and the supporting columns are evenly distributed and installed on the upper portion of the reflecting surface seat, and the top cover is arranged on the upper portion of the sensor fixing seat. A Loongson 1D processor is adopted, the functions of an ultrasonic time difference measurement function (TDC), an ultrasonic pulse generator, a CPU, a serial port, a voltage detection unit, ultrasonic transducer disconnection detection and the like are integrated, modular configuration is adopted, application is convenient and flexible, and field maintenance is facilitated.

The invention discloses an omnibearing leading-out terminal and a leading-out structure of a distribution transformer. The terminal is provided with an insulated mounting seat, a conducting core, a locking nut, a contact terminal, a connecting electrode, a cable connecting mechanism and an insulated external member; the terminal is arranged on an oil tank cover plate of the distribution transformer, when the locking nut is only partially engaged with the cylindrical upper end part of the conducting core, the contact terminal and the connecting electrode positioned on the outside of an oil tank can freely rotate relative to the oil tank cover plate, an installation interface of the connecting electrode can be coincident with the extension direction of an external cable on the site of the distribution transformer, and the external cable does not need to be bent when connected onto the connecting electrode through the cable connecting mechanism, so that the influence of contact heating caused by installation stress is reduced. The direction of connecting the external cable can be adjusted, the terminal has the advantages of convenient mounting, high universality and convenient wiring, the using requirement of product installation can be met to the maximum extent, and the using amount of cables can be saved.

The invention discloses a particulate matter concentration detection device and method. The detection device comprises a measurement unit, a reference correction unit and a controller connected with the measurement unit and the reference correction unit. The measuring unit comprises a light source for emitting laser to the to-be-measured particles and a second optical probe for receiving scatteredlight signals scattered by the to-be-measured dust particles, converting the scattered light signals into dust concentration signals and sending the dust concentration signals to the controller. Thereference correction unit comprises a first optical probe and an optical splitter which is used for dividing the light source into two optical paths. One light beam split by the optical splitter is emitted to dust particles to be detected, and the other light beam is received by the first optical probe, converted into a reference electric signal and sent to the controller. The controller is connected with the first optical probe and the second optical probe and used for receiving the reference electric signal and the dust concentration signal and obtaining a dust particle concentration signalthrough the reference electric signal and the dust concentration signal.

The invention provides a non-injection clamping-type cable anti-theft and alarming mechanism which mainly solves the problems that an existing cable anti-theft and alarming mechanism cannot monitor operating cables in real time and cannot conduct remote alarming. The non-injection clamping-type cable anti-theft and alarming mechanism comprises a signal processing device, an alarming device, an emission device and a receiving device, wherein the emission device and the receiving device are respectively connected with a cable shielding layer. A non-injection clamping-type mode is adopted to connect detect signals to the power cable, an original installation mode with a power cable shielding layer grounded is not changed, and extra safety factors are not caused for operation of the power cable. The mechanism can detect whether the power cable is charged or not, the monitoring of charged cables and monitoring of outage cables is combined into a whole, and on-site installation is convenient greatly.

The invention provides a monitoring method for the residual fatigue life of an expansion joint bellows. According to the method, the displacement amount of the expansion joint bellows in the working state is measured in real time through a sensor, and then the displacement amount is transmitted to a PLC. The PLC calculates the w fatigue lives [Ncw] of the bellows during the next time period m in the working state, wherein w is equal to 1, 2, 3 and so on. In this way, the residual fatigue life Nrf of the expansion joint bellows is obtained, wherein [Nc] is the designed fatigue life of the bellows. The PLC displays the residual fatigue life of the bellows and carries out the early warning and the alarming when the residual fatigue life reaches a preset alarm value. According to the invention, the operation state and the residual life of an expansion joint can be monitored in real time. Meanwhile, the remote early warning function and the alarming function are provided. When the temperature, the pressure or the displacement exceeds rated values, the remote alarm is carried out. The on-site maintenance and the on-site repair are facilitated. The workload of the pipeline maintenance personnel is greatly reduced, so that the safe operation of pipelines can be more efficiently ensured.

The invention relates to a method of a secondary sedimentation tank in sewage treatment by replacing a biochemical method and a structure of the method. The structure comprises a lateral flow sedimentation tank and an air flotation tank, and is characterized in that the method specifically includes the following steps that: (1) effluent water from a biochemical tank enters into the lateral flow sedimentation tank, large-particle sludge particles are rapidly separated in a solid-liquid separation component, and precipitated sludge flows back to a front end biochemical tank; (2) the effluent water from the lateral flow sedimentation tank is quickly separated from small-particle sludge and scum on the water surface through the air flotation tank, and the sludge and the scum are removed. The hydraulic retention time of the secondary sedimentation tank water is greatly shortened, the occupied area is saved, the problem of floating sludge commonly existing in the secondary sedimentation tankis solved, and the effluent water quality is guaranteed. The method can be used for upgrading the standard of sewage treatment plants and for building new sewage treatment plants.

The invention discloses a plasma arc rotational conveying device which comprises a circular ring part, wherein the circular ring part is made of a high-temperature-resistant magnetoconductive material; more than two diversion holes are annularly and evenly distributed on the circular ring part; and the axial lines of the diversion holes are inclined relative to the circumference of the circular ring part. Therefore, the air becomes an excircle type rotational flow gas after passing through the diversion holes arranged on the circular ring part, thereby ensuring that arcs can be blown out of a nozzle in a rotation manner. The plasma arc rotational conveying device has the following advantages: 1, the arcs are blown out of the nozzle in a high-speed rotation manner, so that the time of contact with the electrode surface is very short, thereby greatly prolonging the service life; 2, the lengths of the plasma arcs can be controlled according to design requirements, thereby widening the temperature and the serviceable range; 3, the structure is compact and simple, the cost is saved, and the field maintenance is convenient; and 4, the coal adaptability of the plasma arcs is improved, plasma ignition can be applied to different kinds of coal for different boiler structures, and the oil-saving effect is greatly improved.

The invention overcomes defects in the prior art and provides a dust measuring instrument sensor which is high in measuring precision and sensitivity and good in stability. According to the technical scheme to realize the technical effects, the dust measuring instrument sensor comprises an electric appliance box and an optical fiber coupler, wherein a circuit board is arranged in the electric appliance box, a photodiode is arranged on the circuit board, a full scale calibration block is arranged on the outer side of the electric appliance box, and a laser channel is formed in an end part of the full scale calibration block and connected with the optical fiber coupler through a gas pipe and an optical fiber channel. The dust measuring instrument sensor can be widely applied to the field of dust measurement.

The invention belongs to the field of airborne avionics systems, and provides an automatic FC network configuration data loading method based on a judging mechanism. The method comprises a loading judging sending step 1 in which a loading device sends a loading judging request to a network manager and makes a response according to a loading judging instruction, a loading judging receiving step 2 in which the network manager receives and processes the loading judging request and makes a judging indication according to a judging strategy, a loading control sending step 3 in which a loading device starts to execute configuration data loading, and a loading control receiving step 4 in which the network manager starts to receive and store configuration data.