745results about How to "Optimize structure layout" patented technology

The invention discloses a multi-channel parallel near infrared spectrum imaging system. A multi-wavelength light emitting diode (LED) is applied to finishing emission of near-infrared light. An avalanche photodiode is used for detecting a weak optical signal, the simulating lock-in amplifier technology is used for achieving amplification of the signal, and a near infrared spectrum cerebral function imaging helmet disclosed in Chinese patent application CN200520002784.8 can be used for improving the partial unreasonable design of a self-adaptation head portion. The multi-channel parallel near infrared spectrum imaging system can achieve continuous rapid accurate detection and collection of cerebral blood oxygen signals, overcomes the defect of an existing functional near infrared system, and brings superiority of the near infrared spectrum imaging technology compared with other cerebral function imaging technologies into full play.

The invention discloses a railway tunnel lining quality nondestructive detection boom and a detection method thereof. A radar antenna is mounted on a radar antenna clamping rack; a floating buffer oil cylinder mechanism is connected with the radar antenna clamping rack; the floating buffer oil cylinder mechanism, a three-joint arm, a two-joint arm and a basic arm are connected in sequence; a pitching arm is hinged to the basic arm; a pitching derricking cylinder is connected between the pitching arm and the basic arm; the pitching arm is hinged to a rotary base; a lower pitching derricking cylinder is mounted between the pitching arm and the rotary base; a rotation driving device is disposed on the rotary base; a mounting seat is disposed at the bottom of the rotary base; the rotary base is connected to a traveling carrier. According to the railway tunnel lining quality nondestructive detection boom and the detection method thereof, a multistage-pitching multistage-retractable structure is adopted and waist rotation can be achieved, so that attachment of the radar antenna to the wall surface of a tunnel lining is achieved, the labor intensity of detectors is relieved, the detection quality and working efficiency are improved, nondestructive detection for single-track or double-track tunnels can be achieved, and the railway tunnel lining quality nondestructive detection boom and the detection method thereof can adapt to certain uneven road surfaces. By means of the railway tunnel lining quality nondestructive detection boom and the detection method thereof, the traveling mileage can be recorded, the postures of the boom can be automatically adjusted, the side track height is maintained within a certain range, and the characteristic of high measuring accuracy is achieved.

The invention discloses a timber optimized truncate method and relative optimized truncate saw. First, inputting the saw data list which comprises target saw length and quality parameters into the computer; when the sawed timber that longitudinally supplied passes the position relative to the detecting device, the detecting device reads the information of sawed timber into the computer, and the computer according to the input saw data list and said information to select the optimized sawing method; the saw machine according to said method processes truncating on the timber. Two sides of said truncate machine individually have a feeding platform and a finished product classifying platform; wherein, said feeding platform has a detecting device; said finished product classifying platform has a finished product classifying device; and a waste removing device is arranged between them.

The invention belongs to the field of rapid forming equipment and discloses a 3D printing forming device integrating sanding and printing. According to the D printing forming device integrating sanding and printing, a double sanding and printing integration system is designed, and a sanding device and a printing device are effectively combined, thus the sanding process and the printing process can be simultaneously carried out; and an idle stroke in the sanding and printing process in a single sanding-printing system of traditional 3D printing is removed, thus the manufacturing time of a single-layer sand mould is greatly shortened, and the manufacturing efficiency of the sand mould is improved. By manufacturing the sand mould by adopting a method, the manufacturing mode of 3D printing the sand mould in single and small batch is facilitated, and the 3D printing forming device integrating sanding and printing has very strong popularization and use values.

The invention discloses an electro-hydraulic servo steering system and a steering control method of a multi-axle vehicle and the multi-axle vehicle with the steering system. The electro-hydraulic servo steering system comprises a hydraulic steering system and an electric control system, wherein the hydraulic steering system comprises a variable pump, power-assisted steering oil cylinders and a servo proportional valve; the power-assisted steering oil cylinders are at least arranged on various rear steering axles; the servo proportional valve is used for controlling the trend of an oil path and the flow adjustment; the electronic control system comprises a lower controller and an upper controller; the lower controller is in signal connection with the servo proportional valve on each steering axle and forms closed loop control; and the upper controller is used for calculating a target corner of each steering axle according to a first axle corner and a steering mode. According to the invention, the electronic control systems of a two-stage controller is optimized, so that the servo proportional valve and the lower controller form a small closed loop; the lower controller with high frequency response is matched with the servo proportional valve to ensure the precision; and a programmable logic controller is used for main calculation work and transmitting a corner instruction to the each lower controller. The invention has the advantages of simple structural arrangement, safety, reliability and favorable control stability.

The invention relates to a shape-preserving foldable wing suitable for the occasions with the requirements of changing the pneumatic area of aircraft wings and saving the parking space. The foldable wing is composed of an inner wing section, an outer wing section and a shape-preserving rotation body. According to the layout design, the pneumatic continuity of the shape of the wing is effectively maintained in the folding process, and enough supporting rigidity can be provided. Thus, the shape-preserving foldable wing can meet the folding requirement when aircrafts are parked on the ground and can be folded by a specific angle according to the flight control requirements in the flying process.

The invention discloses a mobile crane, a steering mid positioning and locking device and a mid cylinder thereof. The mid cylinder comprises a cylinder body, a first piston, a second piston, a first end cover, the second end cover and a piston rod, wherein the cylinder body comprises a middle cylinder barrel, a first cylinder barrel and a second cylinder barrel, and the first and second cylinder barrels are provided with second oil inlets that are communicated with the inner cavity, respectively; the first piston and the second piston are arranged in the first and second cylinder barrels, respectively; and the piston rod is supported in the middle cylinder barrel, penetrates through the first piston and extends out of the first end cover, and the mobile stroke of the piston rod is smaller than the length of the middle cylinder barrel. The device can realizes control of steering axle independently and locks the steering axle in the middle position to travel linearly, thereby ensuring high speed and stable traveling of a vehicle. The steering axle can steer freely when separated freely to realize smaller steering radius and greater bearing capacity of the chassis and the traveling capacity of crab walk, therefore, the large-tonnage crane tends to electrical steering, steer-by-wire and rod free steering.

The invention provides a solid-liquid hybrid rocket combined cycle propelling system, and relates to the technical field of aerospace power equipment. The solid-liquid hybrid rocket combined cycle propelling system comprises an air inlet, a solid-liquid hybrid rocket engine, a super combustion chamber, an exhaust nozzle and an oxidizing agent conveying device. The solid-liquid hybrid rocket engine, the super combustion chamber and the exhaust nozzle are successively communicated in sequence. A combustion chamber and an after-combustion chamber are successively arranged in the solid-liquid hybrid rocket engine. The air inlet is arranged on the circumferential outer side of the solid-liquid hybrid rocket engine and directly communicates with the super combustion chamber. The oxidizing agent conveying device is connected with the combustion chamber and the after-combustion chamber. The solid-liquid hybrid rocket combined cycle propelling system is simple in structure, safe, efficient and stable in combustion, ignition is easy, and the flow of an oxidizing agent and the thrust of the system can be flexibly adjusted. On the basis, the invention further provides a control method of the propelling system.

A hybrid power transmission comprises double planet rows, a first motor, a second motor and a third clutch. The double planet rows include a first planet row and a second planet row, the first planet row comprises an outer gear ring, a first sun gear and a first planet gear, and the second planet row comprises a second outer gear ring, a second sun gear and a second planet gear; the first motor and the second motor are mounted on one side of the double planet rows, the first motor is connected with the first sun gear, and the second motor is connected with the second sun gear; the first planet gear and the second planet gear are meshed with each other and share a planet carrier; and one side of the third clutch is connected with the first sun gear, and the other side of the third clutch is connected with the second sun gear. The invention further provides a hybrid power transmission system comprising the hybrid power transmission. According to the technical scheme, energy loss is reduced, work efficiency of an engine and the motors is improved, and an automobile can be accelerated effectively.

The invention discloses an electrochemical atomic force microscope probe carriage-electrolytic cell device and belongs to the field of scanning probe microtechnique. Common glass is replaced with transparent conductive glass for a window of an atomic force microscope probe carriage, the transparent conductive glass is used as a counter electrode, the counter electrode is parallel to an operating electrode, the counter electrode is larger than the operating electrode in area, the problem of nonuniform electric field distribution is solved, and layout and installation of the electrodes in the electrolytic cell are simplified. Using the transparent conductive glass as the window of the atomic force microscope is nearly impervious to laser adjustment and detection of the atomic force microscope.

The invention relates to a rotary magnetic field generating device for welding. The rotary magnetic field generating device comprises a coil support (2). A welding gun fixing clip (7) is fixedly arranged in the center of the coil support through a welding gun fixing bracket (6); and a welding gun (1) is installed on the welding gun fixing clip (7). Two groups of coils in the same height are fixedly arranged on the coil support (2), and the two groups of coils are spaced by 90 degrees. The two groups of coils are respectively connected with an excitation power supply through a waveform positioner; the two groups of coils are adjusted and are respectively connected with a synchronous sine alternating current and a synchronous cosine alternating current. A phase difference between the sine alternating current the cosine alternating current is 90 degrees. After being electrified, a magnetic field parallel to a coil axis is generated in the middle of each group of coils; and the magnetic field also changes in sine and cosine along with the changes of the electric current. The magnitude of the magnetic field is unchanged during a circling motion along the magnetic field direction, and accordingly a welding arc is also in the circling motion along with the magnetic field. When the welding gun moves forward, the electric arc moves forward spirally to finish the welding.

The invention discloses a captive balloon system which is mainly formed by four parts of a captive balloon ball body, a captive mooring rope, balloon-borne equipment, a safeguard shelter and the like.The captive balloon ball body is of a single capsule structure; furthermore, an inflation valve, a deflation valve, a caution light, a pressure measuring port, a lateral inhaul cable and the like arearranged on a capsule; the inside of the safeguard shelter is divided into an equipment cabin and a monitoring cabin, and a first winch, a power supply and distribution device, a gas supply device, asystem control platform, an air conditioner, a chair and the like are highly integrated; thus, a space is provided for installation and storage of system equipment and comfortable control of the system. The captive balloon system disclosed by the invention has the advantages of convenience in operation, quickness in deployment, good wind resistance, good guarantee, low site requirement and adaptability for long-time deployment in remote area or under severe environment conditions.

A 5-DOF air-float motion simulator comprises a translation platform and an attitude platform. The translation platform comprises a ball surface air-float bearing, a rollover-preventing mechanical stop device, an elevating column, a first air pressure pipeline, a first controller, three plane air-float bearings, a translation platform installation panel, and a translation platform lithium battery. The attitude platform comprises an attitude platform installation panel, 2N air bottles, a second air pressure pipeline, an iGPS, four cold air nozzle, an inertial navigation system, a second controller, three fly wheels, a center of mass adjustment system, and an attitude platform lithium battery. The translation platform accomplishes translation movement in the X and Y directions, the attitude platform accomplishes rotation with respect to the pitch axis, roll axis and yaw axis, so that the simulator achieves simulation of spatial attitude rotation and track translation movement of a spacecraft.

The invention discloses a converter bottom blowing element air-supply method conducting grouping, timing and rotary switching according to intensity and belongs to the technical field of converter steelmaking. According to the tonnage of a converter and the condition of the bottom of the converter, bottom blowing elements are arranged on 1-3 concentric circles of different radiuses or arranged at the bottom of the converter in a double-row or multi-row mode; the bottom blowing elements arranged on the concentric circles are numbered clockwise or anticlockwise and divided into an odd number group and an even number group according to odd numbers and even numbers of the bottom blowing elements; or the bottom blowing elements arranged in the double-row or multi-row mode are numbered from left to right according to each row and divided into an odd number group and an even number group according to odd numbers and even numbers; the bottom blowing elements in the odd number group adopt weak bottom blowing intensity, the bottom blowing elements in the even number group adopts strong bottom blowing intensity, and vice versa. On the basis of optimizing the layout of the combined-blowing converter bottom blowing elements, through the new adjusting method for grouping, timing and rotary switching of air supply intensity of all the bottom blowing elements, slag-steel interface high-efficiency continuous contact is intensified, the slag-steel interface effect contact area is increased, and the effective mass transfer coefficient is increased.

The invention relates to the field of airplane environment control, and is particularly applicable to comprehensive integrated design of a liquid cooling system and an environmental control system of an airplane. A structure of a punching air inlet channel shared by the liquid cooling system and the environmental control system of the airplane is formed by a liquid cooling system 1, an environmental control system 2 and a punching air inlet channel 3, wherein an air-liquid heat exchanger 4 of the liquid cooling system 1 is mounted at the front part of a secondary heat exchanger 5 of the environmental control system 2; a primary heat exchanger 6 of the environmental control system 2 is mounted in an engine nacelle 7 and in front of a pre-cooler 8; and the punching air inlet channel 3 is shared by the air-liquid heat exchanger 4 of the liquid cooling system 1 and the secondary heat exchanger 5 of the environmental control system 2. According to the structure disclosed by the invention, the total amount of punching air needed by the liquid cooling system and the environmental control system can be greatly reduced, so that the compensatory loss of fuel oil of the airplane is reduced, and endurance time is prolonged.

The invention relates to an end plate steel tube concrete post-steel beam connecting node, wherein said node is new beam post connecting node, whose cylinder section shape comprises round, square and rectangle; the section shape of steel beam comprises H and I shapes; the end part of steel beam is mounted on the end plate; when constructing the node, directly inserting one-way locking bolt into the steel tube post wall and end plate hole; the head of bolt has self support function; forming rivet head at the inner side of steel tube; at last, pouring concrete into steel tube post, to form said inventive node. The inventive node has better bearing function and anti-vibration property, with simple structure, simple operation, and easy installment.

The invention relates to an underground shiplock arranged in a mountain body, which comprises an upstream approach channel (2) and a downstream approach channel (4) for connecting a shiplock main body section (3), wherein the shiplock main body section (3) comprises an upper lock head (20), a lock chamber (22) and a lower lock head (21), an upstream water-blocking door slot (6) is arranged at theupper lock head (20) of the shiplock, an upstream working door (7) is arranged behind the upstream water-blocking door slot (6), a downstream working door (8) is arranged at the lower lock head (21) of the shiplock, a downstream access door slot (15) is arranged behind the downstream working door (8), and the shiplock adopts a reinforced concrete lining structure. When the shiplock is built on a water conservancy and hydropower junction in a high mountain and valley area, hole excavation is used for replacing open excavation, thereby greatly saving engineering quantity and cost of the shiplock; by matching with construction of a dam, the navigation conditions of an upstream river course and a downstream river course are improved, and a bright future is provided for enabling the river courses to expand the navigable mileage upstream and developing water transportation traffic in mountain areas.

The invention discloses an aqueous synthetic leather production line. The aqueous synthetic leather production line is characterized by sequentially comprising, according to production procedures, a double-station release paper unwinding machine, a release paper joint table, a storage device, a first precision coating machine, a first drying oven, a double-roll cooling machine, a second precision coating machine, a first multi-layer fold back type drying oven, a multi-roll cooling machine, a stripping device, an edge cutting machine and a double-station winding machine, wherein the double-station winding machine comprises a product winding portion and a release paper winding portion. The aqueous synthetic leather production line is simple in arrangement and adaptive to aqueous synthetic leather production requirements, and mass production of aqueous synthetic leather can be realized. The drying oven is lengthened due to adoption of the 'fold back type drying oven', so that products can stay longer in the drying oven to adapt to drying and foaming characteristics of aqueous products. Further, production efficiency is improved, product quality can be guaranteed, occupied area is reduced, and cost reduction and efficiency improvement can be realized.

The invention discloses a motor-transmission integrated transmission system for a blade electric vehicle. The motor-transmission integrated transmission system for the blade electric vehicle is a two-gear automatic transmission planet gear mechanism. The mechanism is composed of a single-row 2K-H planet gear mechanism, an electromagnetic clutch, an electromagnetic brake, a differential mechanism, a main speed reduction gear and a permanent magnet synchronous motor. A sun gear is directly and fixedly connected with a rotor base of the permanent magnet synchronous motor through a spline. A stator corresponding to a rotor is fixed to a motor shell. The differential mechanism is arranged in the rotor base of the permanent magnet synchronous motor. Power is transmitted to the sun gear through the motor, transmitted to a left half shaft and a right half shaft of the differential mechanism through a planet carrier, and finally output to wheels through the main speed reduction gear. A gear ring and the planet carrier are combined or separated through the clutch and the gear ring and a box body are fixed or separated through the brake. Through different combinations of the working condition or the non-working condition of the clutch and the working condition or the non-working condition of the brake, the switch between two gears is achieved. The motor-transmission integrated transmission system for the blade electric vehicle is simple in mode, compact in structure, small in size, low in weight and capable of meeting the principle that the vehicle is light in weight.

The invention discloses a power transmission system of a four-wheel-drive hybrid vehicle. The power transmission system comprises a front drive system and a rear drive system. The front drive system comprises an engine, an electric generator, a front drive motor and a speed reducer, the front drive motor is in transmission connection with a front wheel differential in the speed reducer, the engine is connected with a front wheel speed reducer in the speed reducer, a clutch is arranged between coaxial gears connected with the engine and the front wheel differential in the speed reducer, and the engine is in transmission connection with the electric generator. On the premise of accomplishing the hybrid drive mode, the existing dual-clutch transmission is replaced by the gear reducer having the fixed transmission ratio, therefore the transmission structure is simplified, the speed reduce is small in size when being compared with the double-clutch transmission, and therefore the size of the power transmission system is decreased. The invention also discloses the four-wheel-drive hybrid vehicle comprising the power transmission system.

The invention provides a concrete mixer which is compact in structure and applicable to an underground tunnel of a coal mine. The concrete mixer mainly comprises a rack, a feed mechanism and a mixing mechanism, wherein the feed mechanism is arranged at the front end of the rack, and the mixing mechanism is arranged on the rack. The mixing mechanism can utilize a concrete raw material feeding funnel with fixed proportion to ensure the proportion of concrete and utilizes an adjustable quantitative water supply part to ensure the water-cement ratio of the concrete, a hydraulic cylinder drives a chain wheel to be lifted to feed, and after a hydraulic motor drives the mixer to mix, the hydraulic cylinder pushes the funnel to turn to pour the mixed concrete into a hopper of an underground concrete wet-spray machine. On the premise of not reducing the mixing capacity of the concrete mixer, movement pieces of the concrete mixer occupy the smallest space, so that the concrete mixer is suitable for tunnel work.

A water purification machine is disclosed. The water purification machine comprises a shell, a filtering system, a booster pump, a water inlet magnetic valve, a wastewater magnetic valve, and the like, wherein the filtering system, the booster pump, the water inlet magnetic valve, the wastewater magnetic valve, and the like are arranged in the shell. The water purification machine is characterized in that: the filtering system comprises a front polypropylene (PP) filter core, a composite filter core and back filter cores; the composite filter core comprises a filter shell; a filtering material of a coarse filtering system and a reverse osmosis (RO) membrane filtering material of a fine filtering system are sequentially sleeved and packaged in the filter shell from outside to inside; and a source water inlet, a concentrated water outlet and a pure water outlet which are communicated with corresponding connecting pipes are formed in the bottom of the filter shell. Various levels of filtering materials are integrated and packaged in the composite filter core, so that the cost of plastic parts and the space occupied by the filter core are largely reduced, connectors and polyethylene (PE) pipes which are used for connecting the filter cores are also not needed, and the material cost and the labor cost are reduced. In addition, internal connectors are reduced, so that the error of water leakage is largely reduced. The water purification machine is simple and reasonable in structural layout, small in occupied space, low in cost, simple in production process, reliable in sealing performance and convenient to maintain and replace.

The present invention provides an AMOLED display screen, a display device and a mobile terminal. The AMOLED display panel includes a plurality of pixels, wherein at least one pixel is a first pixel which includes a first wiring layer and a second wiring layer, the first wiring layer and the second wiring layer are spaced apart, a first electrode route and a first electrode sheet are formed on thefirst wiring layer, a second electrode route and a second electrode sheet are formed on the second wiring layer, the first electrode sheet and the second electrode sheet at least partially overlap toform a first storage capacitor, and at least one of the first electrode route, the second electrode route and the first storage capacitor is made of a light-transmitting conductive material. Accordingto the embodiment of the invention, the transmittance of a first pixel region is raised, therefore, the light transmission requirements of a photosensitive element, a light source or the like can besatisfied, the components of the photosensitive element, a light emitting element and the like can be integrated under the screen, and the overall structural layout is facilitated.

Disclosed is a train main and auxiliary integrated traction converter capable of being axially controlled independently. The train main and auxiliary integrated traction converter comprises two converter units which are independent completely, and an auxiliary inverter, wherein the auxiliary inverter is used for performing free switching in the intermediate link of the two converters through an auxiliary inverter switching apparatus; the back end of the auxiliary inverter is connected with an auxiliary transformer; after voltage drop is performed, the auxiliary inverter supplies electric energy to a charger and an auxiliary machine load; each converter unit comprises a four-quadrant rectifier which is used for performing alternating current-direct current conversion on the bow net single-phase alternating current, a main inverter which is used for converting the intermediate direct current into three-phase alternating current for a traction motor, a charging short-circuited circuit which is used for ensuring the charging and the normal operation of the converters, a grounding detecting unit which is used for monitoring the grounding conditions of each place of the main circuit of the traction converter, and a chopping unit which is used for carrying out overvoltage suppression and rapid discharging in the intermediate link. The train main and auxiliary integrated traction converter has the advantages of simple and compact structure, easy implementation, high reliability and the like.

The invention discloses an integrated frame type pipeline robot and belongs to the field of pipeline robots. A vehicle body of the integrated frame type pipeline robot comprises a frame, a left main crawler belt assembly, a right main crawler belt assembly, a crawler belt angle adjusting mechanism, a sonar fixing frame, a sonar probe, a camera lifting frame, a camera unit, an auxiliary light source, an electronic control box, an electronic control box pull door and a cable traction frame. The main crawler belts are installed on the left side and the right side below the vehicle body through crawler belt rotation shaft hole sites. The crawler belt angle adjusting mechanism is arranged between the main crawler belts. The main crawler belts can be outwards adjusted to a certain angle to form a V shape. The sonar probe is installed on the frame through the sonar fixing frame. One end of the camera lifting frame is arranged on the frame, while the other end of the camera lifting frame is provided with the camera unit and the auxiliary light source. The pipeline robot has the advantages of being compact in structure, strong in passing capability and complete in comprehensive working capability.

The invention relates to a preparation method of a diamond micro-channel heat sink for superhigh heat flux cooling, and belongs to the field of semiconductor device cooling. The method comprises the steps: employing the special substrate technology and the improved CVD preparation technology for preparing a high-quality, no-crack and super-thick diamond self-supporting membrane; controlling the surface roughness of the super-thick diamond membrane through the mechanical grinding and polishing according to the requirements of a thermal contact interface; employing the unique laser processing technology for achieving the fixing of the structure size of the super-thick diamond membrane, carrying out the micro-channel engraving on the surface through a laser micro-beam flow, obtaining a diamond micro-channel heat exchanger with the size being matched with the groove type, and enabling the diamond micro-channel heat exchanger to meet the design requirements of a high heat flux heat exchangefor dissipation. The micro-channel heat sink can be used for the heat dissipation of a high-power-consumption electronic device of spatial loads, such as a phased array radar, a satellite, and a large-scale spacecraft.

A biological tower applied to sewage disposal includes a tower body(1), an inlet branch (2), a water distribution device communicated with the inlet branch (2),a biological filler area (4) and a pedestal (5); wherein, the biological filler area (4) is arranged on the whole tower body (1) while the water distribution device is arranged on the upward side of the biological filler area (4) and a filler supporting net is arranged between the top plate surface of the pedestal (5) and the biological filler area (4); while the pedestal (5) includes a top plate, a bottom plate (52) and a side wall (53) encircling between the top plate and the bottom plate. The top plate of the pedestal (5) is provided with a through hole (51a). The upper part of the side wall (53) of the pedestal (5) is provided with a through hole (53b) and the bottom part is provided with a water outlet (53c). Compared with the prior art, the biological tower of the present invention adopts the purifying mode of natural flow from up to down to lead the tower to consume lower energy. The present invention has the advantages of very simple monolithic structure and fewer parts. The present invention has greatly reduced construction lost and is more suitable for practical application.

The invention provides a novel small-diameter slurry shield tube-changing device, and the problem that a tube-changing device is not suitable for a small-diameter slurry shield in the prior art is solved. The novel small-diameter slurry shield tube-changing device comprises a slurry-feeding extension tube and a slurry-discharging extension tube. The slurry-feeding extension tube is connected with a slurry-feeding tube, the slurry-discharging extension tube is connected with a slurry-discharging tube, and the slurry-feeding extension tube and the slurry-discharging extension tube are arranged on a first trolley; the slurry-discharging tube and the slurry-feeding tube are arranged on a second trolley, a hydraulic winch is arranged on the first trolley, and a hauling pulley is arranged on the second trolley; and a rope of the hydraulic winch is connected with the hauling pulley, a slurry-discharging ball valve and an expansion joint are arranged on the slurry-discharging tube, and a slurry-feeding ball valve and an expansion joint are arranged on the slurry-feeding tube. According to the novel small-diameter slurry shield tube-changing device, a muddy-water pipe is driven to move while shield excavation is achieved by adopting a trolley and an extension tube which move relatively, and the structural arrangement is simple; a constructor conducts the tunneling-tube adding-tunneling step repeatedly, synchronous lengthening of the muddy-water pipe can be achieved, and the operation is convenient; and a complete set of device is low in price, the cost is saved, the occupied space is small, and the novel small-diameter slurry shield tube-changing device is suitable for small-diameter shield tunneling machines.

The invention provides a novel double-motor coupling power mechanism and a control method thereof. The novel double-motor coupling power mechanism comprises a main driving motor and an auxiliary driving motor, wherein the main driving motor is provided with a first output shaft; the first output shaft is fixedly connected with a first sun gear; a first planet gear set is arranged on the outside ofthe first sun gear; a second planet gear set is arranged on the outside of the first planet gear set; the auxiliary driving motor is provided with a second output shaft which sleeves the outside of the first output shaft; the second output shaft is fixedly connected with a second sun gear; the second sun gear is engaged with the second planet gear set; a clutch is arranged between the first output shaft and the second output shaft; and brakes are separately arranged on the outside of the first output shaft and the outside of the second output shaft. By the two brakes and the clutch, power ofa power system does not interrupt in a gear shifting process, impact does not exist during gear shifting, the power system has good gear shifting quality, only one of the brakes and the clutch requires to be controlled to switch over different modes, and thus, the power system is controlled simply.