1285results about How to "Easy for daily maintenance" patented technology

The invention discloses a sound insulation cabin of a turbine engine. The sound insulation cabin is arranged on the turbine engine in a sleeving mode, and comprises a cabin body, an intake noise reduction unit and a ventilation noise reduction unit; the intake noise reduction unit and the ventilation noise reduction unit are arranged on the cabin body, and the periphery of the cabin body is filledwith sound insulation materials; and the intake noise reduction unit is used for intake noise reduction of the turbine engine, and the ventilation noise reduction unit is used for noise reduction ofa ventilation system of the turbine engine. The sound insulation cabin has the beneficial effects that the intake noise reduction unit is additionally arranged at an air inlet of the turbine engine, and intake noise reduction of the turbine engine is achieved; the ventilation noise reduction unit is additionally arranged in the transmission direction of the turbine engine, and the ventilation andcooling noise reduction for the turbine engine is achieved; the periphery of the cabin body is filled with the sound insulation materials, and the overall noise reduction for the periphery of the turbine engine is achieved.

A system, program product, and method for monitoring and managing a plurality of marine riser assets is provided. The system can include one or more floating vessels each carrying a shipboard computer, a plurality of riser assets to be tracked and monitored, a riser asset identification sensor positioned to identify select riser assets being deployed to establish a riser string, one or more riser joint instrument modules positioned along the length of the riser string to provide riser asset load data, a centralized data warehouse to store riser asset identification and loading data for riser assets deployed at multiple remote vessel locations, and a riser lifecycle management server and riser lifecycle management program product adapted to monitor riser asset conditions, issue automated service alerts based on actual use information, maintain routine and non-routine maintenance records, manipulate and categorize riser assets, and automatically generate an accurate riser system configuration as was actually deployed for any particular drilling / completion operation.

The invention discloses an online detection method and protection device for direct current system arc faults. Characteristics of current alternating components of a power circuit in the power-on starting process, the normal work process and the overload fault process of the power circuit and characteristics of the current alternating components of the power circuit during arc generating are combined, selected arc current characteristic components include peak-to-peak values and standard deviations of a time domain and a frequency component power sum within the range from 1 kHz to 100 kHz after noise of specific frequency points of a load is filtered, mahalanobis distance values of the real-time characteristic components and the characteristic components in the power-on starting process, the normal work process and the overload fault process of the power circuit through a mahalanobis distance algorithm, and the mahalanobis distance values are compared with a threshold value set in the learning process to detect whether a single arc is generated or not. By means of the technical scheme, the online detection method and protection device have advantages of being high in university, high in detection rate and low in misjudgment rate, and can be widely applied to low-voltage and high-voltage electric power systems and photovoltaic cell systems of airplanes, electric vehicles and ships, and civil high-voltage direct current power distribution systems.

The invention relates to an elevator shaft construction scaffolding device capable of being elevated along with construction layer of building main body structure and a method for setting the same. The device comprises a scaffold made by setting up steel tubes, hoisting rings, a platform steel frame, support climbing feet, a plurality of wood joists and a template surface layer, wherein the platform steel frame consists of two steel joist main beams and a plurality of secondary beams; the support climbing feet are hinged with the end edges at two ends of the steel joist main beams; the hoisting rings are fixedly connected on the main beams; the plurality of wood joists are arranged above the main beams at a certain interval in the same direction as that of the secondary beams; the template surface layer is fixed above the wood joists through iron nails; the hoisting rings and the connecting short heads of the platform steel frame penetrate through the template surface layer; and the scaffold made by setting up the steel tubes is fixedly connected with the connecting short heads of the platform steel frame penetrate. The device and the method provided by the invention have the following advantages that: the mounting, the positioning, the hoisting and the repositioning of the whole elevator shaft construction scaffolding device are very simple and fast; and the whole system including wall templates can be once finished hoisting within about five minutes.

A circulating fluidized bed coal gasification apparatus includes coal blending system, generator, cyclone dust collector, exhaust-heat boiler, water-cooling tower and Venturi scrubber, wherein the generator has up-and-down two rows of gasifying agent nozzles, helix dust collector and storage groove. The gas pipe which communicates to the cyclone dust collector is set on the top. A feed back pipe which communicates to the generator is set at the bottom of the cyclone dust collector. The cyclone dust collector communicates to the exhaust-heat boiler by gas pipe. The exhaust-heat boiler communicates to the water-cooling tower by gas pipe and communicates to the Venturi scrubber by gas pipe. The characteristics are: the feed back pipe facing to the generator hearth of the cyclone dust collector is a feed back machine with small-sized fluid bed; the cyclone dust collector is composed of at least two tandem dust collector; coal blending system has wind feeding and dust coal drier. The invention achieves the transition of the boiling bed to the circulating fluidized bed and increases the system gasification efficiency.

The invention relates to an intelligent terminal electronic ordering method and a system based on 3G and cloud technology, uses a 3G or WiFi wireless network and internet for data exchange, configures a menu on the computer terminal or intelligent terminal and uploads the menu information to the cloud server, after synchronous update of other terminal device, the intelligent terminal can be used for ordering operation, and the ordering information is uploaded to the cloud server and connected terminal thereof for execution of subsequent operation; The intelligent terminal can also be used for billing operation, billing information is uploaded to the cloud server and a connected cloud printing device for execution of bill printing. Restaurant operation conditions can be queried on both the computer terminal and the intelligent terminal. The method not only makes the menu configuration easy, improves ordering experience, but also improves service quality and efficiency, relevant information is stored on the cloud server, and the consumption data can be used for statistic analysis at any moment.

The invention relates to a four-position full automatic locker moulding machine and a method thereof. The four-position full automatic locker moulding machine comprises a feeding mechanism, a cutting mechanism, a moulding mechanism, a discharging mechanism and a position shifting mechanism all mounted on a platform. The position shifting mechanism comprises a core turntable arranged above the platform and an edge trimming mechanism, and the edge trimming mechanism, the discharging mechanism, the cutting mechanism and the moulding mechanism are distributed anticlockwise with the same radian according to the core turntable. The feeding mechanism is arranged on the corner between the discharging mechanism and the cutting mechanism, and the discharge end of the feeding mechanism is arranged just opposite the charging end of the cutting mechanism. Eight core seats are fixed on the periphery of the core turntable with the same radian, and the core seats can be matched with the edge trimming mechanism, the discharging mechanism, the cutting mechanism and the moulding mechanism face to face in turn after being rotated. The method of the four-position full automatic lock moulding machine comprises steps of charging, cutting, position shifting, moulding, edge trimming and discharging. The four-position full automatic lock moulding machine can manufacture finished products of high unity, can produce engine lockers of various specifications through replacing cores and moulding cavities, and has the advantages of simple replacement and high production efficiency.

The invention discloses a software uninstalling method and a software uninstalling device. The method comprises the steps: aiming at software installed at a client side, a software installation information library and an uninstalling protection library are arranged in the client side, wherein the installation information of the installed software are recorded in the software installation information library and includes position information of added or modified items of the software in the installation process; uninstalling protection conditions of the installed software are recorded in the uninstalling protection library; when uninstalling operation on the installed software of a user is detected, the installation information and uninstalling protection conditions of the software are searched in the software installation information library and the uninstalling protection library, the position of items to be eliminated is positioned according to installation information, and corresponding items are eliminated if the elimination of the items is judged not to trigger the uninstalling protection conditions. The software uninstalling method and the software installing device can well make up for the common unloading defects of the existing software.

The invention discloses a vision measurement technology-based catenary geometric parameter measurement instrument and a detection method. The measurement instrument comprises a measurement trolley, wherein a baseline connected with the measurement trolley is horizontally arranged on the measurement trolley; a camera for acquiring the information of a catenary is arranged at each of the two ends of the baseline, and is connected with the baseline; a vertical rod connected with the measurement trolley is perpendicularly arranged on the measurement trolley; an angle-adjustable industrial computer for being communicated with the cameras is arranged at the top of the vertical rod. According to the measurement instrument and the detection method, the precision measurement instrument which can be used in field is developed based on a precision mechanical design in combination with the requirements of an industrial field environment by taking computer vision measurement as a core; massive data acquired in field is analyzed to construct a railway catenary state model to deeply and precisely measure the state of the catenary so as to form a driving safety early-warning system of a catenary system.

The embodiment of the invention relates to a method for positioning an underground pipeline and a system thereof. The method comprises the following steps of: transmitting an electromagnetic wave signal to a wireless radio-frequency positioning marker containing an ID code; receiving a wireless signal which is fed back by the wireless radio-frequency positioning marker and contains the ID code and the underground pipeline information; carrying out checking treatment on the ID code and the underground pipeline information; determining an embedded place name of the wireless radio-frequency positioning marker according to the ID code; determining the embedded concrete position of the pipeline; and determining the trend of the pipeline according to the orientation information of the adjacent wireless radio-frequency positioning marker. The embodiment of the invention also provides a positioning system of the underground pipeline. The positioning method and the positioning system in the embodiment of the invention can realize the accurate positioning of the underground pipeline, find fault points as soon as possible when faults happen, reduce the digging area and the compensation cost,furthermore help maintainers establish the records of maintaining in normal times and overhauling the underground pipeline.

The invention discloses on-line purification equipment for a metal machining fluid and a purification method thereof. The equipment comprises a purification fluid tank, a stock solution tank, a magnetic separation pool, a magnetic slag tank, a drum type multi-stage magnetic separation device, a gas-liquid mixing pump, an ozone generator, an ozone copolymerization air-float sterilization separation device and a Y-shaped water outlet pipe, wherein the drum type multi-stage magnetic separation device adopts a drum-shaped structure, the inner wall of the drum is embedded with a plurality of same permanent magnets at certain intervals along the same axial direction; and the inside of the ozone copolymerization air-float sterilization separation device is orderly provided with a grid, a baffle plate and an ozone contact generator from bottom to top, and the upper part of the ozone contact generator is a separation zone. The method comprises the main steps of magnetic separation, gas dissolution, sterilization and water and slag discharge. The method has the advantages of realizing the on-line circular purification and use of the machining fluid, prolonging the service life of the machining fluid, greatly reducing the amount of waste fluid generated and achieving the aims of water conservation, emission reduction and clean production.

The invention relates to a sunlight-tracking double-shaft device and a control method thereof. The sunlight-tracking double-shaft device comprises a battery board fixing bracket, a support bracket, a pitch angle rotation driving member and a left and right angle rotation driving member, wherein the battery board fixing bracket is connected with the support bracket through a three-dimensional rotating mechanism consisting of a pitch angle rotating shaft and a left and right angle rotating shaft which are distributed in a crisscross shape; and the pitch angle rotation driving member and a left and right angle tracking drive member control the coordinated rotation of the pitch angle and the left and right angles according to a control method, thereby enabling the working surface of a battery board in a tracking device to accurately correspond to the position of the sun and achieving the purpose of sunlight tracking. The sunlight-tracking double-shaft device has the characteristics of simple and reasonable structure, low energy consumption for running, high running precision, simple control program and the like, and is convenient for installation and daily maintenance.

The invention discloses an industrial communication isolation gap with a double-channel ferrying function. The industrial communication isolation gap comprises a safety end processing unit, a non-safety-end processing unit and a ferrying unit. The circuit of the safety end processing unit, that of the non-safety-end processing unit and that of the ferrying unit are all independent of one another and three units are communicated by USBs (Universal Serial Bus); the ferrying unit adopts a double-channel ferrying form; double channels are two independent one-way channels; one channel is a request channel, takes charge of carrying out one-way requesting from a non-safety end to a safety end and is used for configuration requesting and label requesting; the other channel is a data channel, takes charge of carrying out one-way transmission from the safety end to the non-safety end and is used for process data transmission and state data transmission. The isolation gap is used for an industrial control network and an upper layer information network to realize one-way transmission of process data under the condition of physical isolation, can perform functions of no maintenance of a tag and remote configuration, maintenance and management and brings great convenience to normal data acquisition and daily maintenance.

A split winch band shaft fast rotating device is provided herein. The device is disposed at the band shaft extension end at one side of the winch mount, and includes a band shaft joint and a rotator. At least one crowbar hole is set on the rotator. The rotator is coupled to one side of the band shaft joint with a unidirectional linkage mechanism set at the contact surface thereof. The band shaft extension end has at least one pin hole. The band shaft joint could be inserted into or covered on the band shaft extension end with a detachable connection mechanism arranged therebetween which could make the joint fixedly connected to the extension end by inserting one or more axle pins into the pin holes. The split winch band shaft fast rotating device is low in cost, convenient in maintenance, flexible in operation, and could improve the bundling speed of the winch.

The invention relates to a performance testing device of a carbon dioxide refrigeration compressor for trans-critical and sub-critical refrigeration systems. The prior art is improved in the way thata component for pressure regulation and pressure reduction is connected between a compressor exhaust opening and an exhaust flowmeter in parallel; a safety valve component A is arranged on an oil separator; a safety valve component B is arranged on a condenser; a safety valve component C is arranged on a liquid reservoir; a subcooler is connected between a shutoff valve C of an outlet of the liquid reservoir and an electromagnetic valve in series; a safety valve component D is arranged on the subcooler; a refrigerant filling and recovering storage tank is connected between an inlet of a mass flowmeter and an outlet of a shutoff valve E in parallel; a recovering shutoff valve and a recovering electromagnetic valve are arranged at the position of an inlet of the refrigerant filling and recovering storage tank, a filling shutoff valve and a filling electromagnetic valve are arranged at the position of an outlet of the refrigerant filling and recovering storage tank, and a safety valve component E is arranged on the refrigerant filling and recovering storage tank; and a safety valve component F is arranged on a gas cooler. In the invention, most of parts can adopt products of the conventional pressure resisting grade, thereby solving the problem of higher pressure of the whole system, reducing the cost and improving the safety of the system.

The invention provides a dynamic domain name service optimizing system, and relates to the field of network communication. A conventional DNS mainly has the problem of address resolution suboptimum; as a BGP service is forwarded through a destination address, BGP service access quality is relatively more greatly influenced by different addresses obtained for an identical domain name; and as the conventional domain names all provide a plurality of sets of addresses for the access of users, the satisfaction of the users in access experiences is greatly improved if an optimal resolved address can be obtained. The dynamic domain name service optimizing system comprises a DNS optimization controller, adopts an active working principle, queries all DNS results for www.abc.com according to a request of a client for the www.abc.com, puts the DNS results into a comparison list, performs connectivity checking on records in the list, determines a fastest IP address record through calculation and comparison and returns optimal IP address information to the client.

The invention relates to a sunlight corresponding apparatus, which comprises a solar energy assembly mount, a raised support bracket, a rotating support framework, a left-and-right angle corresponding driving member and a pitch angle corresponding driving member. The solar energy assembly mount is hinged on the rotating support framework that is hinged on the raised support bracket; and accurate tracking on sunlight is realized on the basis of coordinated movements of the left-and-right angle corresponding driving member and the pitch angle corresponding driving member. According to the invention, the apparatus has a simple and reasonable structure; energy consumption for running is low; and the running accuracy is high; besides, the apparatus is easy to control and is convenient for installation and daily maintenance.

The invention discloses a rotary table of a desktop mechanical arm. The rotary table is provided with a base, a large arm driving motor, a small arm driving motor, a large arm speed reducing assemblyand a small arm speed reducing assembly, wherein the large arm driving motor and the small arm driving motor are located at the rear side of the base and arranged in an up-down stacking manner; the large arm speed reducing assembly and the small arm speed reducing assembly are located on the left outer side surface and the right outer side surface of the base separately; the large arm speed reducing assembly comprises a large arm first-level synchronous belt wheel and a large arm second-level synchronous belt wheel located between the large arm first-level synchronous belt wheel and the base;and the small arm speed reducing assembly comprises a small arm first-level synchronous belt wheel and a small arm second-level synchronous belt wheel located between the small arm first-level synchronous belt wheel and the base. According to the rotary table of the desktop mechanical arm, the safety is improved; for a speed reducing synchronous belt, arrangement for auxiliary assemblies is reduced, so that the manufacturing cost is reduced, and the speed reducing ratio can be increased and the speed reducing effect can be improved, so that the control precision is ensured; and moreover, the rotary table of the desktop mechanical arm is simple in structure, easy to detach and install, and convenient to maintain.

The invention provides a power truck for a meter-gage route and a vehicle for the meter-gage route. The power truck comprises two wheel pair assemblies, a framework, a traction motor, a primary suspension device and a secondary suspension device. The secondary suspension device comprises two air springs and a height control valve for controlling the heights of the air springs, the framework comprises two steel pipes which are located between the two wheel pair assemblies, the two steel pipes and the wheel pair assemblies are arranged in parallel, each steel pipe is communicated with an air bag of one air spring, and the two steel pipes are communicated through differential valves. Sealing covers are arranged at the two ends of each steel pipe, the sealing cover at at least one end of each steel pipes is detachably connected to the steel pipe, and sealing pieces are arranged between the sealing covers and the steel pipes respectively. According to the power truck, the high speed travelling requirements of the vehicle are met, safety, stability and comfortable performance of the vehicle are improved, routine maintenance and overhaul can be conveniently carried out, and the problems that when the steel pipes serve as additional air chambers, rusting scrap iron in the steel pipes cannot be cleaned and antiseptic treatment cannot be carried out after the inner walls of the steel pipes are corroded are solved.

The invention relates to the technical field of wind power generation equipment, in particular to a single-frame type impeller of a wind turbine. An existing horizontal-axis wind turbine affected by the structure and materials is low in wind utilization rate, high in design requirements, heavy and large, difficult to maintain and easy to overspeed and gallop. The single-frame type impeller of the wind turbine comprises a wind wheel frame, a vane adjusting device, a support and diagonal support rods, wherein the vane adjusting device is connected with the support and assembled at the front end of a turbine spindle, the wind wheel frame is connected with the support via the diagonal support rods, and vanes are assembled in the wind wheel frame and around the vane adjusting device via shafts, the vane adjusting device is provided with a closed adjusting chamber, and a gear type or connecting rod type adjusting mechanism is assembled in the adjusting chamber. By changing the vane connecting mode, the number of the vanes is increased, wind energy utilization efficiency is improved, output power of the wind turbine is increased, volume, height and weight of the wind turbine are reduced, and the single-frame type impeller is reasonable in structure and convenient for daily maintenance and overhauling.

The invention provides a cloud automatic sale system and a control method. The system includes an integrated application service subsystem, an intelligent distribution service subsystem, an intelligent sale terminal IoT subsystem, a cloud server and a backend server. The backend server uses the cloud server to connect with the integrated application service subsystem, the intelligent distribution service subsystem and the intelligent sales terminal IoT subsystem; the integrated application service subsystem includes a number of franchisee terminals and vending machines; the intelligent distribution service subsystem includes multiple delivery terminals and vending machines; and the intelligent sales terminal IoT subsystem includes a terminal inspection module and a network sharing module. All the data and functions in the system of the present invention are accomplished in the cloud to ensure the unity, security and smoothness of data transmission, and it is beneficial for data synchronization scheduling and mining analysis so as to improve the user experience.

The invention discloses an electric wheelbarrow structure. A control mainboard is arranged in a groove which is formed in a plastic casing which is arranged on one side; the control mainboard is fixed through an integral part of a silicone gel protective cushion and a cover plate; the battery is arranged in a groove which is formed in a plastic casing which is arranged on the other side; the battery is fixed through the integral part of the silicone gel protective cushion and the cover plate. The electric wheelbarrow structure enables the assembling efficiency of the electric wheelbarrow to be improved and is convenient for daily maintenance and disassembling maintenance.

The invention discloses an assembled and combined cabin concrete structure of a shallow-buried 0815-type underground comprehensive pipe gallery. The assembled and combined cabin concrete structure comprises a first-class main line pipe gallery provided with multiple standard segments; each standard segment comprises an upper cabin and a lower cabin, the upper cabin is of an upper cabin concrete structure which is formed by assembling two same L-shaped bracket column connection plate side walls and an inspection beam connection plate cabin cover, the two side walls are symmetrically distributed on the two sides of the upper cabin to form a U-shaped connection body, and the cabin cover covers the top of the U-shaped connection body in a jointed mode to form the upper cabin to contain municipal pipelines; the lower cabin is of a boat-shaped groove concrete structure formed by assembling two same inverted-T-shaped structure ground beams, and the two structure ground beams are symmetrically distributed on the two sides of the lower cabin and connected to form an inverted-pi-shaped connection body for containing rainwater pipelines and sewage pipelines; the upper cabin is detachably installed on the lower cabin. Assembling moulds of the assembled and combined cabin concrete structure are easier to demould, hoist, transport and install, high in anti-seismic performance and commonality and mature in technology and can be applied to unified management of the municipal pipelines.

The invention discloses a buried elevating-type environmentally-friendly dustbin which comprises an outer box body. The top of the outer box body is provided with a bracket, and an elevating mechanism is fixed to the bracket. Supporting protruding strips are arranged on two inner side walls opposite to the outer box body respectively, and the inner side faces of the supporting protruding strips are provided with grooves. An inner cavity of the outer box body further contains an elevating platform connected with the elevating mechanism. The side face, opposite to the supporting protruding strips, of the elevating platform is provided with a first idler wheel set and a second idler wheel set. The rolling surface of the first idler wheel set and the rolling surface of the second idler wheel set abut against the left side face and the right side face of each supporting protruding strip in an attached mode respectively. A plurality of adjustable roll balls are further arranged on the side face of the elevating platform between the first idler wheel set and the second idler wheel set, and the rolling surfaces of the adjustable roll balls abut against the bottom faces of the grooves. A first containing box and a second containing box are arranged on the elevating platform, and the top of the first containing box and the top of the second containing box are provided with rubbish throwing boxes respectively, wherein the rubbish throwing boxes are communicated with corresponding inner cavities of the first containing box and the second containing box. The buried elevating-type environmentally-friendly dustbin solves the technical problem of an existing buried elevating-type dustbin.

The invention discloses an unmanned aerial vehicle body integrated molding technology. Carbon fiber prepreg and lightweight foam are used as raw materials, are paved on the inner wall of a double-female mold combination mold by adopting a prepreg lapping joint integral layering technology, and then are integrally solidified and molded by adopting an autoclave molding technology. The unmanned aerial vehicle body integrated molding technology has the beneficial effects that the technology is simple and is easy to operate; the molding time is short; the product size is accurate and controllable;and a manufactured unmanned aerial vehicle body has high strength, good rigidity, light dead weight and a smooth and fat surface, is easy to maintain routinely and is suitable for large batch production.

The invention discloses an alternating current charging post in-situ test device and an alternating current charging post in-situ test method. The in-situ test device comprises a main control unit, an alternating current standard meter, a program-controlled alternating current electronic source and a test equipment interface, wherein the main control unit is connected with the alternating current standard meter, the program-controlled alternating current electronic source and the test equipment interface in two directions respectively; the test equipment interface comprises a test output interface and a test input interface; the test input interface is connected with the alternating current input end, the charging output end and a test signal end of the alternating current charging post respectively; and the main control unit judges if the alternating current charging post passes the test according to a reported result and the test requirements of the alternating current charging post. The device and the method solve the problem of lacking alternating current charging post test equipment currently and have a very great significance for large scale popularization of alternating current charging posts.

The invention discloses a suspension bridge steel wire rope damage patrolling robot. The suspension bridge steel wire rope damage patrolling robot comprises a base, a patrolling device arranged on the base and conducting patrolling on suspension bridge steel wire rope damage, and a control device controlling the patrolling device. The process for patrolling a steel wire rope includes the steps that firstly, the patrolling device is installed; secondly, the patrolling robot conducts patrolling on the suspension bridge steel wire rope; thirdly, after the robot finish patrolling, the robot returns to the initial end of the suspension bridge steel wire rope; fourthly, the first step, the second step and the third step are repeatedly conducted many times; and fifthly, damage state data are obtained. The suspension bridge steel wire rope damage patrolling robot is novel and reasonable in design, low in using cost, easy to operate, good in safety and capable of conveniently and rapidly finishing the suspension bridge steel wire rope damage patrolling operation; through the arrangement of the control device, a user remotely controls the patrolling robot to conduct high-altitude detection through a wireless remote control transmitter, and safety hidden danger of workers during high-altitude operation is avoided; and design is ingenious and reasonable, reliability and stability are achieved, the size is small, and practicability is high.

The invention aims at providing a device for testing the jet flow drag reduction effect of a two-dimensional plane. The device comprises a water tank, a water pump and a test section, wherein the test section comprises a two-dimensional channel, a two-dimensional channel inlet is arranged at one end of the two-dimensional channel, a two-dimensional channel outlet is arranged at the other end of the two-dimensional channel, the two-dimensional channel inlet is in a gradually reducing shape, the two-dimensional channel outlet is in a gradually expanding shape, a grid type rectifying section is arranged between the two-dimensional channel inlet and the two-dimensional channel, the water pump is communicated with the water tank, the water pump is communicated with the two-dimensional channel inlet through an inlet pipeline, the two-dimensional channel outlet is communicated with the water tank through an outlet pipeline, a speed regulator valve, an electromagnetic flow meter and a pressure meter are arranged on the inlet pipeline, the inlet pipeline is also communicated with a backflow pipeline on which an overflow valve is arranged, and the backflow pipeline is communicated with the water tank. The device has the advantages of low cost, compact structure, small size, convenience in daily maintenance and low noise. The device can be used for testing the drag reduction effect of jet flow surfaces and non-smooth surfaces and can also be used for conventional fluid dynamic tests.

The invention relates to the technical field of building materials and particularly relates to a ceramic aluminum single sheet and a preparation process of the ceramic aluminum single sheet. The ceramic aluminum single sheet comprises an aluminum alloy panel, wherein a sand-sprayed passivation layer, a chromizing pre-treatment layer and a fluorine-carbon ceramic coating are sequentially and outwardly arranged at the outer side of the aluminum alloy panel; the fluorine-carbon ceramic coating sequentially comprises a fluorine-carbon primer layer, a fluorine-carbon paint layer and a fluorine-carbon protection layer from inside to outside; a chromizing protection layer is arranged at the inner side of the aluminum alloy panel, and then the sand-sprayed passivation layer and the chromizing pre-treatment layer are arranged, and finally the fluorine-carbon ceramic coating is arranged, so that the surface of the alloy panel is cleaned and the adhesive force is strong; and the fluorine-carbon ceramic coating is firmly attached and is not easy to drop off. The preparation process of the ceramic aluminum single sheet disclosed by the invention is reliable and feasible, so that the final product ceramic aluminum single sheet has the advantages of excellent adhesive force, excellent acid resistance, excellent solvent resistance, excellent abrasion resistance, excellent impact resistance and excellent mechanical property.

The invention provides a multi-light position multi-dimensional tunnel lighting mode which is composed of a plurality of dimensional lighting components, which are respectively the low-light position reverse lighting component, the homodromous lighting component, the transverse lighting component and the high-light position reverse lighting component. All the lighting components are independent on lighting functions, light color scope, lighting direction and lighting space, and can be individually adjusted. Each component is provided with a special light source and a light which are installed at low position and independently run based on the task characteristics, and the special demands on pavement lighting, space lighting and tunnel lighting can be met. The efficiency can be maximized in each task, so that the total lighting can be comprehensively optimized. With the adoption of the multi-light position multi-dimensional tunnel lighting mode, the shortcomings of the traditional tunnel lighting mode can be overcome; the light source and the light which have different functions perform relevant functions, so that a series of problems of tunnel lighting can be effectively solved, and the lighting efficiency can be greatly improved. The multi-light position multi-dimensional tunnel lighting mode is independently applied and developed based on the property of the low power and high light efficiency light source; the lighting mode of traditional tunnel light is completely removed; and the mode of simply replacing HPS (High Pressure Sodium) and MH (Metal Halide) lights with the LED lights can be changed.