88results about How to "Achieve unimpeded" patented technology

The invention discloses an RFID (Radio Frequency Identification Device) based seafood supply chain traceability system under an exclusive shop direct sales model, comprising a client, a server and a backend database which are all in network connection; the client comprises RFID reader-writers, an RFID electronic label and a client computer, wherein the RFID reader-writer is in network connection with a plurality of RFID electronic label networks, and a plurality of RFID read-writers are in network connection with the client computer; the server comprises a culture subsystem, a processing subsystem, a delivery subsystem, an exclusive shop subsystem, a consumer and controlling authority subsystem and a management subsystem, wherein the management subsystem is respectively connected with the culture subsystem, the processing subsystem, the delivery subsystem, the exclusive shop subsystem and the consumer and controlling authority subsystem, and the culture subsystem, the processing subsystem, the delivery subsystem, the exclusive shop subsystem and the consumer and controlling authority subsystem are in network connection. The invention has the advantages of high speed, high efficiency, convenient management, capability of tracking relevant information of each link of a supply chain, and the like.

The invention relates to an urban self-help parking and supervisory system based on a mobile phone, belonging to the field of wireless internet service and applied to urban self-help parking and supervision. The system consists of five parts including a parking identification, a mobile phone parking meter, a supervisory program, a management program and a server, wherein the mobile phone parking meter, the supervisory program and the management program are respectively imbedded into the mobile phones of a car owner, a parking manager and a parking management superintendent in the manner of air download; the car owner can realize networked parking timing, charging and payment through the mobile phone parking meter after parking the car in a parking place with the parking identification; the parking manager can realize the real-time supervision over all or partial parking places according to authorization through the supervisory program, take pictures of cars which break traffic rules and regulations and uploads the pictures and the reorganization result of taken pictures to the server in real time; the parking management superintendent can set basic data required by the self-help parking of the car owner and the supervision of the parking manager through the management program.

The invention discloses a windowing method and device of a covered stent. The device comprises a guide device and a puncture needle, wherein the guide device comprises a conveying sheath tube and an expander or an adjustable bent sheath tube and an expander; the outer wall of the expander is in match with the conveying sheath tube or the adjustable bent sheath tube; the guide device is conveyed along a guide wire to the outer wall of a position to be holed of the covered stent; a second guide wire chamber is formed in the puncture needle, and the puncture needle is conveyed along protecting a guide wire to the sidewall of the covered stent; a needle head can be bulged from the end part of the conveying sheath tube or the adjustable bent sheath tube. According to the scheme, the device has the advantages that the guide device and the puncture needle are matched with each other to hole in a specified position on the covered stent, and then the hole formed in the covered stent by the puncture needle can be expanded to reach the size as required through a hole expanding device, so that blood in branch vessel and aorta can flow smoothly, and as a result, the covered stent can be applied to the circumstance that aortic diseases occur in multi-branch vessels, accumulate in multi-branch vessels or excessively close to multi-branch vessels.

According to a traffic light timed and adaptive control ideal of the invention, vehicles are observed before a stop line, and whether there is no vehicle or there are sparsely-distributed vehicles on a lane is judged according to the distance interval between vehicles or an equivalent time interval. A traffic light adaptive control system scheme is formed by adding a plurality of detection sensors on the basis of a traditional traffic signal controller control scheme. Three levels of adaptive control mechanisms are put forward. The first level aims to shorten the time for waiting at the intersection, namely, a currently opened lane can be shut off when that there is no vehicle or there are sparsely-distributed vehicles on the lane is detected. The second level aims to make the traffic light timed control parameter adjusted automatically in accordance with the traffic conditions and closer to the optimal. The third level requests that the detection sensors can provide accurate traffic flow information to provide a basis for regional or metropolitan traffic intelligent management. The invention further put forwards a scheme for communication between the detection sensors and a traffic signal controller.

The invention aims to provide a dam passing system suitable for migratory fishes to pass a hydro-junction and an application method. A fish collecting net box is mounted at the tail end of lifting machinery and can vertically move on the lifting machinery, a splayed fish collecting net is arranged between the lifting machinery and dykes, a fish passing sliding rail is mounted at the top end of the lifting machinery and transversely laid at the top of a dam, and the fish collecting net box can slide on the fish collecting sliding rail. Water-climbing habits of fishes are utilized to induce the migratory fishes to swim into the net box to pass the dam through a lifting device. The dam passing system is simple in structure and low in construction cost. The application method is high in fish passing efficiency and capable of realizing continuous fish passing.

The invention discloses a negative oxygen ion activity enhancing device and a humidifier provided with the same. The negative oxygen ion activity enhancing device is characterized by comprising one or more free electron accelerators, and is capable of improving the depressurization effect and ozone reduction effect and enhancing activity of negative oxygen ions. The humidifier can realize the effects that water mist of small particles and the negative oxygen ions generated by a negative oxygen ion releasing part are combined to form O<2><->(H<2>O)<n> ion clusters, the air conductivity is increased, the excess static electricity is guided away, and the electrostatic effect is greatly reduced.

The invention discloses a power inspection unmanned aerial vehicle link relay system, which relates to the field of unmanned aerial vehicles. The system comprises a mobile ground control station, a relay unmanned air vehicle and an inspection unmanned aerial vehicle, wherein the mobile ground station and the relay unmanned air vehicle are in signal connection; and the relay unmanned air vehicle and the inspection unmanned aerial vehicle are in signal connection. Thus, stable transmission of an unmanned aerial vehicle flight control command and aerial image data can be ensured, the data link between the unmanned aerial vehicle and the ground station is smooth, deepened application of the unmanned aerial vehicle in transmission line inspection work is promoted, resource allocation is optimized, science and technology are transformed to productive forces, and the comprehensive efficiency and the benefits of the inspection work are enhanced.

A roadway wireless video communication base station relates to a roadway wireless video communication base suitable for underground and solves the problems that a communication line in a mining area is worn, smashed and broken and is hard to recover, and a video signal for communication transmission is interrupted due to slope changing points and roadway corners. The base station comprises a receiver (1), a changeover switch (2) and a transmitter (3), wherein the receiver comprises a receiving antenna (11), a high-frequency amplifier (12), a frequency mixer (13), a middle-frequency amplifier (14), a broadband frequency discriminator (15) and a video amplifier (16); the changeover switch (2) has two connecting modes, wherein one connecting mode is that the changeover switch (2) is connected to an A position to communicate the input end of the transmitter (3); and the other connecting mode is that the changeover switch (2) is connected to a B position to communicate an audio / video interface (22); the transmitter (3) comprises a video amplifier (31), a voltage controlled amplifier (32), a power amplifier (33) and a transmitting antenna (34); and a ground dispatching center can monitor the position and the environmental parameter (gas) change of mining and digging machinery in the mining area through a video on a real-time basis so as to keep continuous and smooth video communication line.

The invention relates to a network equipment information acquisition and IP address automatic segmentation method, a system and equipment. The method comprises the following steps of acquiring the information of network equipment; extracting the basic information for representing the identity of the network equipment according to the information of the network equipment and the IP address information; associating the basic information of the network equipment with the input information of corresponding network equipment in a basic information base; automatically dividing the IP address information into a private network IP address, a public network IP address and corresponding IP network segments according to the respective characteristic information thereof. Therefore, the basic information for representing the identity of the network equipment and the IP address information are automatically collected. After that, the private network IP address, the public network IP address and corresponding IP network segments are automatically segmented, and invalid IP addresses are separated. The automatic management and maintenance can be achieved, and the data accuracy can be improved to 99.99%. The shared overall time for automatically collecting, analyzing, docking and updating the information, and the maintenance operation time is within two seconds.

The invention discloses an annular flyover for straight movement and large-radius turning at a crossroad, which belongs to the design of a flyover structure which can realize completely smooth straight movement and large-radius turning by a single-layer flyover at the crossroad. The annular flyover is provided with four lane change parts, and each lane change part is within the radian corresponding to the included angle of 0-90 degrees of a central angle; the inner ring entering point of one lane change part is connected with an inner ring single slope bridge, and the outer ring outgoing point of the same lane change part is connected with an outer ring single slope bridge; and the rotation directions of the inner ring single slope bridges are the same. The invention has the advantages that straight movement and large-radius turning in respective lane can be realized only by the single-layer annular bridge and four groups of inner ring single slope bridges and outer ring single slope bridges, and vehicles run completely smoothly. The complete smoothness without cross road occupation of the vehicles at the crossroad is realized with minimum bridge construction facilities, minimum bridge construction expense and minimum occupied crossroad ground and space.

The invention relates to an underwater control module. The underwater control module comprises an upper docking panel, a lower docking panel, a locking rod and a protective hood, wherein the upper docking panel comprises an upper panel, at least two electrical connectors are arranged at one side of the upper panel in a penetrating manner, a circular tube is arranged at the center of the top face of the upper panel, a plurality of oil path holes are formed around the circular tube, electromagnetic reversing valves are arranged corresponding to the oil path holes, hydraulic quick-change connectors are arranged on the bottom face of the upper panel corresponding to the oil path holes, and at least two guiding rods are further arranged on the bottom face of the upper panel; the lower docking panel comprises a lower panel, electrical connectors are arranged at one side of the lower panel, a threaded hole is formed in the center of the lower panel, hydraulic quick-change connectors are arranged on the top face of the lower panel, and guiding holes are further formed in the top face of the lower panel; a shoulder is arranged at the upper end of the locking rod, a shoulder is arranged at the middle of the locking rod, and the lower end of the locking rod is provided with threads; a tray is fixedly arranged on the middle shoulder, and the threads of the lower end of the locking rod is connected with the threaded hole of the lower panel; a through hole is formed in the top face of the protective hood, the shoulder of the upper end of the locking rod is tightly attached to the bottom face of the through hole of the protective hood, and a hood opening of the protective hood is fixedly arranged on the top face of the upper panel. The underwater control module is high in docking accuracy, is convenient to mount and dismount and can be applied to the field of deep water.

The invention relates to a fast hardening early strength concrete for overall width repair of a cement concrete pavement. The fast hardening early strength concrete is prepared from the following raw materials in parts by weight: 450-480 parts of cement, 620-660 parts of medium sand, 1120-1140 parts of macadam, 140-160 parts of water and 4-6 parts of additive. The fast hardening early strength concrete has the beneficial effects that (1) the fact repair material for the cement concrete pavement, provided by the invention, has the characteristics of high early strength, high overall width repair speed for the damaged cement concrete pavement, capability of realizing clear road within 24h, convenience for realizing favorable traffic conditions, good working performance and the like; and (2) the cement, the medium sand, the macadam and the additive adopted by the invention are all common base materials on the market, and special materials which have a fast hardening early strength effect, but are high in cost and are not widely applied are not adopted, so that the fast hardening early strength concrete can be favorably popularized and applied in a large scale, and the maintenance and repair cost is reduced.

The invention discloses a pipe column structure for the CO2 flooding gas injection process. The pipe column structure comprises a guiding shoe, a check valve, a setting ball seat, a Y445 packer, an inserting pipe, a reverse circulation valve and an oil pipe. The guiding shoe is connected with the check valve; the upper end of the check valve is connected with the setting ball seat; the upper end of the setting ball seat is connected with the Y445 packer; the Y445 packer is connected with the inserting pipe; and the upper end of the inserting pipe is connected with the reverse circulation valveand the oil pipe in sequence. During working, the parts are connected in sequence, a pipe column is put downwards, an annulus is filled with a conventional oil-based annulus protection fluid in a reverse circulation mode, a quick-dissolving soluble ball is put, pressure injection for setting is conducted, and thus gas can be injected normally; when the pipe column is taken out, through the checkvalve, the oil pipe is directly emptied so that pressure can be released, the pipe column is lifted up, the inserting pipe is pulled out, and thus a pipe string can be taken out; if pressure relief ofthe oil pipe fails, a well killing fluid is injected in a reverse circulation mode for well killing, then the pipe column is lifted up, and thus the pipe string can be taken out; after pipe string checking work, the parts are connected in sequence, the pipe column is put downwards, the inserting pipe is inserted into the packer, and thus sealing well-completion can be conducted.

The invention relates to the technical field of medical instruments, in particular to an intravascular stent and a preparation method thereof. The thermal induction type shape memory high-molecular polymer is adopted as an intravascular stent material, and deformation can be generated under the influence of the body temperature of a human body, so that the two ends of a broken blood vessel are supported, and blood flow is unblocked; meanwhile, vascular endothelial growth factors are added into the vascular stent material, so that endothelial cells in blood can be collected, the endothelialization rate is increased, cells on the most superficial layer of the endovascular intima of a human body grow towards the lumen surface of an artificial blood vessel, and a layer of membranous tissue of the endothelial cells is formed; thus, the number of platelets can be reduced by loading heparin on the inner wall of the intravascular stent, so that the thrombus symptom is relieved.

The invention discloses a dustproof device of an electric power steering system. The dustproof device of the electric power steering system comprises dustproof covers arranged at the end of a steeringmachine shell, wherein exhaust grooves which enable inner cavities of the dustproof covers and an inner cavity of the steering machine shell to be in a communication state are formed in the steeringmachine shell. According to the dustproof device of the electric power steering system, the exhaust grooves are formed in the steering machine shell, so that the inner cavities of the dustproof coversand the inner cavity of the steering machine shell are in a communicated state, air in the two dustproof covers can flow back and forth, so that an air path is unblocked, the air pressure balance ina closed space is rapidly realized during steering a wheel, the problem that the boosting effect is influenced due to resistance caused by uneven internal air pressure during steering the wheel is solved, the reliability of the electric power steering system is improved, and the comfort level of drivers is improved.

The invention a novel continuous charging device used for a single crystal furnace. The novel continuous charging device used for the single crystal furnace comprises a material storage device, a transition device, a fixing device, a liquid exporting device and a heating device and also comprises a batch charging device, wherein the batch charging device is arranged on the upper end of a furnace body; the just lower end of the batch charging device is provided with a material storage device; the material storage device is arranged on the lower end of the furnace body; the inlet end of the transition device is connected with the material storage device; the transition device is arranged on the upper end of the fixing device; the inlet end of the liquid exporting device is connected with theoutlet end of the transition device; the outlet end of the liquid exporting device is arranged on the inner wall of a quartz crucible; the heating device surrounds the outer sides of the transition device and the liquid exporting device. By use of the novel continuous charging device, the problems in the prior art that silicon liquid crystal phase distribution is uneven and silicon liquid consistency is poor after silicon materials are fused are thoroughly solved, pre-charging is not required, charging and material melting time is shortened, silicon rod fusion efficiency and levels are improved, crystal pulling efficiency is improved, labor intensity and production cost are effectively lowered, and meanwhile, the novel continuous charging device is convenient for popularization since input is low.

The invention discloses an automatic sewer cleaner, and belongs to the field of a cleaning article. The problem that a sewer is troublesomely to clean artificially after being blocked can be mainly solved. The automatic sewer cleaner comprises a shell; a motor and a power source are arranged inside the shell; a connection board is in thread connection with the upper end of the shell; a rotation shaft of the motor passes through the connection board, and then is sequentially provided with a stirring fin and a filter screen at the top end from top to bottom; a connection pipe with an outer thread is arranged on the connection board; a sealing ring is sleeved on the connection pipe; a pressure sensor is arranged on the filter screen; and the pressure sensor is connected with a power supply circuit. With the adoption of the automatic sewer cleaner provided by the invention, the stirring fin is driven by the power source and the motor to crush impurities, and the crushed impurities are rushed into the sewer, so that the sewer is smooth, and the time and the labor can be saved.

The invention relates to the technical field of pavement drainage, and discloses a drainage asphalt pavement with a replaceable transverse drainage hose. The drainage asphalt pavement comprises a large-gap permeable asphalt concrete surface layer, a modified emulsified asphalt bleeding sealing layer, an asphalt mixture middle-lower surface layer, a graded broken stone sealing layer, a bonding layer and a base layer from top to bottom, a transverse drainage cutting groove is formed in the asphalt mixture middle-lower surface layer, and a plurality of layers of permeable drainage pipe sets are arranged in the transverse drainage cutting groove. By optimizing the transverse drainage of the pavement and adopting the drainage pipe group capable of being replaced for multiple times, when the drainage pipe group is blocked, the function of the drainage pipe group can be restored to the beginning of traffic through replacement, the function maximization of the transverse drainage capacity of the pavement in the whole life cycle of the pavement is ensured, and the service life of the water seepage function of the whole drainage pavement is prolonged; and the drainage pipe group is convenient and quick to replace, low in laying cost and simple in process, and can meet the requirements of current elevated or ground drainage asphalt pavement newly-built projects.

The invention discloses a transport hub system for concurrent free flow of sixteen directions at a crossroad, which is composed of a concave lane and an arch bridge form effective height for car running, and four left change lanes are arranged at the bottom of an approach bridge of the arch bridge and at the corner of a pier, thereby really realizing the concurrent free flow of the sixteen directions at the cross road, greatly increasing the car running speed, basically solving the traffic bottleneck problem, effectively reducing the vertical height and the span of 50 percent of bridge climbing and the depth of the concave lane down grading, saving land use without affecting city appearance and scenic visual field, maintaining the coordination and elegance of the surrounding environment, and providing a good development platform for the prosperity of the city; and the adoption of guard rail web strips, pedestrian overpasses or tunnels and nonmotorized vehicle lanes and the implementation of man and car separation basically avoid the occurrence of tragic accidents that a man is hit by a car, the occurrence probability of the traffic accidents is greatly reduced. The system of the invention is widely applicable to the construction of traffic road junctions, in particular to the reformation and reconstruction of the cross roads in old cities and inner cities of a metropolis.

The invention provides an automatic water-supply type ink stick for industrial art. The ink stick includes a stick body, a stick sleeve, a light emitter, a lead screw, a light receiver, rotating columns, rollers, a water tank, a circuit box, a storage battery, an iron core, multiple coils, an insert pin, a spring and limiting bolts. The stick body is sleeved with the stick sleeve, the light emitter is in threaded connection with the front side face of the stick sleeve, the lead screw vertically penetrates through a vertical groove in the right end of the stick sleeve, and a sliding block on the back side of the light emitter sleeves the lead screw and forms a lead screw-nut mechanism with the lead screw; the rotating columns are inserted in columns which are arranged at the four corners ofthe bottom surface of the stick sleeve, and the rollers are hinged to the bottoms of the rotating columns. The casings of the water tank, circuit box and storage battery are integrated and bonded tothe back side, left side and right side of the stick sleeve respectively. The coils are wound around the iron core and placed on the right side of a water drainage pipe of the water tank, the insert pin horizontally penetrates through the water drainage pipe, and the spring is connected to the left end of the insert pin. Changes of the concentration of ink influence the resistance value of a photoresistor in the light receiver, and a control circuit controls the insert pin to be powered on and controls the water drainage pipe to be blocked.

The invention discloses a novel flow control valve, and relates to the field of flow control over pipelines. The novel flow control valve comprises a pipeline, a sealing pipe is installed on the outerside of the pipeline, a plurality of flow adjusting plates inserted into the pipeline are arranged in the sealing pipe, and a servo motor and a gear ring are arranged on the inner wall of the sealingpipe; and a gear is fixed to the driving end of the servo motor and engaged with the gear ring, the gear ring is connected with the inner wall of the sealing pipe in a sliding mode through a sealinggasket, an oblique gear ring is fixed to the side, away from the servo motor, of the gear ring, and a plurality of threaded rods are rotatably mounted on the side, close to the oblique gear ring, of the inner wall of the sealing pipe. Bevel gears are installed at the top ends of the threaded rods and engaged with the bevel gear ring, and the bottom ends of the threaded rods and the flow adjustingplates are installed in a threaded mode. According to the flow control valve, the flow of fluid in the pipeline can be rapidly, conveniently and stably adjusted through the arrangement of all the structures, the adjusting range of the flow control valve is 0-100%, and influences on the original flow of the pipeline can be avoided.

The invention discloses an impermeable static-conducting combined tee joint with a sheath and a manufacturing method thereof; the impermeable static-conducting combine tee joint with the sheath comprises an inner tee joint and an outer tee joint; the inner tee joint comprises an impermeable static-conducting tee joint lining layer shaped by injection moulding; the peripheral side of the impermeable static-conducting tee joint lining layer is molded with a protecting layer; the outer tee joint comprises left sheaths shaped by injection moulding and respectively sleeved at the left side of the inner tee joint, a right sheath sleeved at the right side of the inner tee joint and an upper sheath sleeved at the upside of the inner tee joint; every two of the left sheath, the right sheath and the upper sheath can be welded and shaped to be an integrated structure. The impermeable static-conducting combined tee joint with the sheath is simpler in shaping and an effectively and reliably realize smooth pipeline static-conducting channels and conveying pipelines, prevent leakage in conveying oil, oil gas and other chemical industry fluid; thus the mould structure is simpler and more reasonable.

The invention discloses a diversion head. The diversion head comprises an inner adsorption pipe with an inner tube suction hole, and an outer adsorption tube arranged in the inner adsorption tube in a sleeving mode. The opening area of the inner tube suction hole is smaller than the sectional area of the inner adsorption tube. An outer tube suction hole is formed in the outer adsorption tube. The outer adsorption tube and the inner adsorption tube can relatively rotate to achieve the purpose that the position, relative to the outer tube suction hole, of the inner tube suction hole is switched between an aligned state and a dislocated state. Compared with an original diversion tube needing to be dredged through an iron wire, a diversion head can be dredged without other tools, the dredging efficiency is high, the dredging effect is good, operation is easy, convenient and quick, time spent on dredging operation is shortened, operation time is shortened, emotional fluctuation of a doctor is relieved, and operation quality is improved. The invention further provides a suction device with the diversion head.

The invention provides a planned production scheduling method and system for the chemical fiber industry. The planned production scheduling method comprises the following steps: obtaining a productionplan; generating a main plan according to the production unit, the machine table, the weight of the to-be-produced products of the machine table and the sequence of production arrangements; and issuing the main plan to the corresponding production unit and machine table according to the product specification, the mapping relationship between the process information and the production unit and themapping relationship between the production unit and the machine table. According to the planned production scheduling method, the management efficiency and the production efficiency of a chemical fiber enterprise are greatly improved by associating the product specification with the corresponding relation between the workshop and the unit and associating the corresponding relation between the unit and the machine table and automatically distributing the workshop, the unit and the machine table by automatically analyzing the product specification and the yield.

The invention relates to a dense net support with bionic micro-thorn attachment structures. The dense net support comprises an elastic framework and the multiple bionic micro-thorn attachment structures. The framework is a woven net pipe with a plurality of grid units, the area of any grid unit ranges from 0.1mm< 2 > to 10mm< 2 >, the framework has anatomical form adaptability, the bionic micro-thorn attachment structures are arranged on the outer surface of the framework, the form of the bionic micro-thorn attachment structures is bionic micro-thorns on the surface of a plant, each bionic micro-thorn attachment structure comprises a thorn root and a micro-thorn, each micro-thorn is composed of a thorn body and a thorn tip, each micro-thorn is in a linear shape or a J shape or a combination of the linear shape and the J shape, the thorn bodies and / or the thorn tips of the micro-thorns can make contact with the inner wall of a pipe cavity, and the attachment type anchoring function is achieved. The dense net support is wide in application range, capable of achieving accurate positioning, resistant to displacement, high in firmness and excellent in safety.

The invention discloses an accelerated passing system used in an intersection. The accelerated passing system used in an intersection is characterized in that in an intersection, right sides of centre lines of lanes for vehicles having various driving directions are provided with direct-movement vehicle conveying devices and left-turn vehicle conveying devices; structures of the direct-movement vehicle conveying devices and the left-turn vehicle conveying devices are same; the direct-movement vehicle conveying devices and the left-turn vehicle conveying devices comprise supports located under the lane surfaces; an initial end driving chain wheel and a tail end driven chain wheel are arranged on the supports of each one of the direct-movement vehicle conveying devices and the left-turn vehicle conveying devices; multiple upper carrier rollers are arranged between the initial end driving chain wheel and the tail end driven chain wheel on the supports; a conveying chain is wound on the initial end driving chain wheel, the upper carrier rollers and the tail end driven chain wheel; the initial end driving chain wheel is connected to an electric reducer arranged on the supports; and a lower chain of the conveying chain contacts with multiple lower carrier rollers arranged on the supports. The accelerated passing system used in an intersection has the advantages that when direct-movement vehicles and left-turn vehicles run on the direct-movement vehicle conveying devices and the left-turn vehicle conveying devices, through superposition of vehicle driving speeds and conveying speeds of the direct-movement vehicle conveying devices or the left-turn vehicle conveying devices, the direct-movement vehicles and the left-turn vehicles can acceleratedly pass through an intersection, and thus the jam of vehicles in an intersection is reduced or prevented.

The invention relates to a smooth combination structure of four single bridges or tunnels turning in the same direction at a crossroad and belongs to the traffic building facility combination structure with totally smooth direct movement and big turning at the crossroad. A ring layer on the surface of a subgrade is provided with four lane changing positions and the radian of each lane changing position is in the range of the radian corresponding to 0 to 90 degrees of an inclined angle of a center angle; one end of each single bridge or tunnel turning in the same direction is positioned outside a ring of the ring layer on the surface of the subgrade, while the other end thereof is connected with an inlet ring point of the ring layer on the surface of the subgrade; and the parts inside the rings of the four single bridges or tunnels turning in the same direction have the same turning direction. The smooth combination structure of the invention has the advantages that only four single bridges or tunnels turning in the same direction are constructed; and compared with other overpasses, the smooth combination structure uses fewest building facilities and lowest construction cost, occupies the smallest ground and space of the crossroad and realizes totally smooth direct movement and big turning without cross road occupation at the crossroad.