169results about How to "Reduced forward resistance" patented technology

A suspension maglev rail transit system includes an orbital system, a suspension system, a control system and a car system, wherein the control system comprises a drive system, a guidance system and asuspension control system, wherein the track system is suspended in the air through upright posts, the car system is suspended vertically below the track system through the suspension system, and thedrive system and the guidance system cooperate to drive the car system to operate in the track system. The invention utilizes the levitation force with the permanent magnet repulsion force as the main force and the electromagnetic regulation as the auxiliary force to suspend the car on the air track, and realizes the stable operation through the non-contact traction of the linear motor. The invention has the advantages of low energy consumption, high safety, no land occupation, low cost, strong climbing ability, small turning radius and wide adaptability.

A liquid discharge head is arranged in a manner that in the cross section of a discharge port in a liquid discharge direction, the discharge port includes: at least one projection that is convex inside the discharge port; a first area, for holding a liquid surface connecting a pillar-shaped liquid that is elongated outside the discharge port; and second areas where a fluid resistance is lower than that in the first area so as to pull the liquid in the discharge port in a direction opposite to the liquid discharge direction; and the first area is formed in the direction in which the projection is convex, and the second areas are formed on both sides of the projection.

The invention provides a self compensation floating swing arm independent suspension system, comprising a self compensation floating swing arm independent suspension device and a centrifugal force control scissors-type anti-roll bar device. The two mechanisms can be used in combination or independently and are applicable to both front wheels and rear wheels. The self compensation floating swing arm independent suspension system guarantees that wheels perform line bounce along a vertical direction of a car body on various kinds of road surfaces when a car runs at a low speed or at a high speed or makes turns and guarantees maximum contact area between the wheels and the road surfaces, with the parameters of king pin angle, toe-in angle, camber angle, wheel track, and axle base being maintained the same as original parameters; and, when the car makes turns, the centrifugal force control scissors-type anti-roll bar device works automatically, offsets a roll force with a force equal to the roll force in magnitude and opposite to the roll force in direction, and enables the car body to lower automatically, thereby improving anti-roll capacity and realizing idealization of controllability, safety, stability and comfort of the car. The self compensation floating swing arm independent suspension system has a simple structure, excellent performance, and low cost, and is easy to realize.

The invention discloses an auxiliary traction head of a rolling type cylindrical power cable threading apparatus. The auxiliary traction head comprises a cylinder, and a first fixing plate and a second fixing plate are arranged on the two sides of the interior of the cylinder correspondingly. A first open hole and a second open hole are formed in the middle of the first fixing plate and the middleof the second fixing plate in a penetrating mode correspondingly. A fixing sleeve corresponding to the second open hole in position is fixedly connected to the side wall of the second fixing plate, and a traction head is arranged in the second open hole. A cable connecting ring is fixedly connected to the end, facing the interior of the cylinder, of the traction head, and a traction wire is fixedly connected to the end, facing the exterior of the cylinder, of the traction head. A limiting sleeve is connected to the fixing sleeve in a threaded sleeving mode. A cleaning mechanism located on theouter side of the second fixing plate is arranged in the cylinder. According to the invention, cables with different diameters and thicknesses can be quickly and firmly connected, the use is more convenient, the use applicability is improved, the working efficiency is improved, the damage of sundries to the cable skin is effectively prevented, and the working quality is improved.

The invention relates to an equal-depth and wide seed opener for deep fertilization of wheat and belongs to the technical field of agricultural machinery. The opener comprises a front cutting edge, a fertilization pipe, a seed conveying pipe, a seed distributing box, and seedbed reconditioning machines for equal-depth seeding operation by a no-tillage and wide zone seeder. The front cutting edge and the fertilization pipe are integrally welded and soil in the operating process moves toward two sides to form a seed channel for the deep fertilization; the three-way seed conveying pipe is separated in the middle, so that the independent wide seeding at two sides is achieved; the seed distributing box and the seedbed reconditioning machines follow the fertilization pipe to move forward, the M type seed bed reconditioning machines are symmetrically arranged below the seed distributing box in forms of sharp corners, and a seed scattering plate on the bottom surface is provided with an ejecting bump. During work, the M type seed bed reconditioning machines on the bottoms of tow sides of the seed distributing box level the bottom of a trench with the uneven surface so as to form a wide dustpan-shaped plane with a trench cross section, and meanwhile, seeds fall into the seed distributing box by virtue of the three-way seed conveying pipe and are repeatedly ejected and uniformly scattered to a level seedbed by virtue of the seed scattering plate, so that the equal-depth uniform seeding is achieved.

The invention relates to a dynamic positioning thrust system for an all direction propeller and a lifting rudder, which belongs to dynamic positioning technical equipment in the field of ship marine technology. The dynamic positioning thrust system comprises the all direction propeller and the lifting rudder. The all direction propeller is arranged below the stern part of a ship, and a C1 axial line thereof vertically intersects with a longitudinal symmetric axis of the ship; and the lifting rudder is arranged below the bow part of the ship, and a C2 axial line thereof vertically intersects with the longitudinal symmetric axis of the ship. In an abyssal environment, when the ship is in the executive process of performing dynamic positioning, the lifting rudder and the all direction propeller cooperate together to finish tasks of overcoming surging, swaying and yawing of the ship; and under a control instruction of a control system, the all direction propeller and the lifting rudder are controlled to implement thrust executive function of the dynamic positioning according to the established proposal. The technology of the invention can be applied to large size, medium size and small size ships or semi-submersible ocean platform, has a positive significance on improving the dynamic positioning technology, and can produce obvious economic benefit.

The invention discloses a friction stir welding method for a stirring pin and a shaft shoulder during differential speed rotation, relates to the friction stir welding method and solves the problems of high downward pressure and high forward resistance and various problems caused by overcoming high speed rotation of the stirring pin and high speed rotation of the shaft shoulder in the same direction or non-rotation of the shaft shoulder existing in conventional friction stir welding. The method comprises the following steps of: inserting the stirring pin of a stirring head into a part to be welded at a rotation speed of between 3,000 and 30,000 rpm, wherein the rotation speed of the shaft shoulder of the stirring head is less than that of the stirring pin and the rotation direction of the stirring head is reverse to that of the stirring pin; the rotation speed of the shaft shoulder is 10 to 1,000 rpm; the insertion speed of the stirring head is 1 to 5 millimeter / minute; the depth of the stirring pin inserted into a workpiece is 0 to 0.5mm less than the thickness of the workpiece; and the depth of the shaft shoulder inserted into the workpiece is 0 to 0.5mm; and moving the stirring head along the horizontal direction of a butting surface of a first welded workpiece and a second welded workpiece at a speed of between 100 and 5,000 millimeter / minute. The heat required by the welding does not depend on the friction between the shaft shoulder and the welded material, so high downward pressure is not needed to ensure the friction of the shaft shoulder part to produce heat and the downward pressure is reduced.

The invention relates to a bionic narrow-fertilizer ditch and wide-seed band double-seed path opener and belongs to the technical field of agricultural machinery. The bionic narrow-fertilizer ditch and wide-seed band double-seed path opener comprises a fertilizer conveying pipe, a double-seed-path seed conveying pipe, a seed distribution box, a narrow-fertilizer ditch shovel wing, a wide-seed band shovel wing, a transition shovel wing, a sword type front cutting edge, a scattering plate, a seed baffling plate and the like; the bionic narrow-fertilizer ditch and wide-seed band double-seed path opener can be used for working conditions of rotary tillage type tillage, blocking prevention, ditching and the like of a no-tillage seeder, a wide-seed band seeder and the like, and can also be applicable to the working condition of directly breaking stubbles and ditching on a cultivated land or an uncultivated land by a common no-tillage seeder; seed fertilizer application, equal-depth accurate seeding and uniform distribution of seeds in the seed band are realized; the seeding quality and the fertilization quality are guaranteed; a foundation is laid on the yield improvement of crops; the head-on space of the opener is greatly increased and the problems of grass hanging and congestion are solved.

The invention provides an axial flow device comprising a shell and a transmission device. The shell is provided with the transmission device and is internally provided with a shell cavity; a vortex tube impeller is arranged in the shell cavity; the transmission device is connected with a vortex tube impeller; the vortex tube impeller is provided with a vortex tube which is provided with an impeller opening A and an impeller opening B and is internally provided with a wheel body, and the wheel body is provided with a guide blade; an inclined angle is formed between the guide blade and a rotating shaft of the vortex tube impeller; the guide blade is connected to the inner wall of the vortex tube; a shell cavity opening A is arranged at one end, which corresponds to the impeller opening A, of the shell cavity; and a shell cavity opening B is arranged at the other end of the shell cavity. The axial flow device is more energy-saving and can be used for pressurizing and conveying fluid. The axial flow device can serve as a water pump, vacuum equipment, air suction equipment, an air blower, a compressor, atomizing equipment, sprinkling equipment, a reactor, air blowing equipment, propelling equipment, a sewage processor, a dust remover, a dust collector, dressing equipment, a steam turbine, a water turbine, a wind turbine, a vortex pressurizing device utilizing residual heat of an engine, foam material manufacturing equipment, nano material manufacturing equipment and the like; and the axial flow device can be used for manufacturing a brand new foam material.

The invention discloses a large-pipe-diameter manual jacking pipe for space-separated excavation and an excavation construction method applying the jacking pipe. The jacking pipe includes a tool pipeand a concrete pipe, the tool pipe includes a blade feet section and a rectification section, the internal space of the blade feet section is divided by partition plates, the partition plates are composed of a horizontal middle partition and a vertical middle partition plate, the internal space of a steel pipe of the blade feet section is divided into three parts by the partition plats, specifically, an upper first space, an upper second space and a lower third space, and a rectifying device is fixedly connected into the jacking pipe. Through the transformation of the tool pipe, the problems of difficult jacking, large settlement and being prone to collapsing of a traditional jacking pipe in a sand pebble stratum can be solved effectively; the problems that a conventional tool pipe is large in an excavation tunnel face, secondary disturbance is more frequent in the process of manual excavation, and reinforced soil collapses in a bulk mode and falls down together with ungrouted soil atthe same time are avoided; and the efficiency of continuous work in the process of manual pipe jacking can be improved greatly, and the construction period and cost are saved.

A prefabricated splice pipe jacking system and a construction method thereof are provided. The prefabricated splice pipe jacking system comprises a main jacking mechanism and a spliced pipeline arranged along a design path of a designed pipeline; the inner diameter of the spliced pipeline is greater than the outer diameter of the designed pipeline; the spliced pipeline is formed by splicing splicepipes; the splice pipes are elongated plates, the front and rear edges of each splice pipe are correspondingly raised out to form axial lap edges respectively, and left and right edges of each splicepipe are correspondingly raised out to form peripheral lap edges respectively; the splice pipes that are coaxial are spliced in sequence through the axial lap edges along the axis of the spliced pipeline, and the splice pipes that are co-peripheral are spliced in sequence through the peripheral lap edges along the annular direction of the spliced pipeline; all the splice pipes are fastened via connectors. According to the construction method of the invention, a temporary spliced pipeline is spliced along a design path of a designed pipeline to provide powerful support for excavation and jacking processes; by using manual earth cutting to cooperate with pipe jacking construction, it is possible to meet the requirement for common construction conditions pipe jacking construction. The prefabricated splice pipe jacking system and the construction method thereof are widely applicable to pipe jacking construction.

The invention relates to a bionic wide-width leveling seed bed type opener and belongs to the technical field of agricultural machinery. The bionic wide-width leveling seed bed type opener comprises a seed conveying pipe, a seed distribution box, a seed bed preparation curve surface, a sword type front cutting edge and the like, and can be used for working conditions of rotary tillage type tillage, blocking prevention, ditching and the like of a no-tillage seeder, a wide-seed band seeder and the like; the seed conveying pipe and the seed distribution box are welded so as to form a whole body; a swordfish gill type seed bed preparation curve surface is arranged below the seed distribution box; the sword type front cutting edge is embedded in front of the seed distribution box and the seed bed preparation curve surface to divide soil from the two sides; a seed distribution plate is arranged on the bottom face of the seed distribution box and an ejection bulge is arranged above the seed distribution plate, so as to be beneficial to uniform seed distribution; the equal-depth accurate seeding is realized; the seeding quality is guaranteed; a foundation is laid for the yield improvement of crops.

The invention discloses a drag-reduction guiding unloading device and pushing method for pushing and constructing a combined bridge. An upper sliding support piece with an adjustable height is arranged on a lower support assembly, and the lower support assembly is fixed to a steel girder in use; the face, opposite to the side face of a rib of a concrete bridge-road plate, of the drag-reduction guiding unloading device is provided with a guiding face for providing guidance in a rolling fraction mode when the concrete bridge-road plate is pushed, and the upper sliding support piece is used for supporting wing plates of the concrete bridge-road plate in a rolling fraction mode when in use. Through the adoption of the drag-reduction guiding unloading device and pushing method for pushing and constructing the combined bridgen, the contact and sliding fraction between the bridge-road plate and the steel girder is converted into rolling fraction, and the forward resistance to pushing of the concrete bridge-road plate is obviously reduced; the transverse position of the slab rib of the concrete bridge-road plate is restrained by the lower support assembly through the guiding face, so that it is guaranteed that transverse guidance is provided for push forwarding of the concrete bridge-road plate on the steel girder along a set trajectory; by adjusting the height of the upper sliding support piece, the gravity, supported by the device, of the concrete bridge-road plate can be conveniently unloaded and transferred to the top face of the steel girder.

The invention discloses a rice tray growing seedling growing tray shipping machine, and belongs to the technical filed of agricultural machinery. The rice tray growing seedling growing tray shipping machine comprises a machine frame, a seedling tray spade, and a delivery mechanism, wherein a walking mechanism and a veering mechanism are arranged at the lower end of the machine frame separately, the seedling tray spade is arranged at the front end of the heading direction of the machine frame, and a seedling tray frame is arranged at the rear end of the machine frame, the seedling tray spade is arranged at the front end of the heading direction of the machine frame, and is used for scooping up a seedling tray, the delivery mechanism is arranged on the machine frame between the seedling tray spade and the seedling tray frame, and delivers the seedling tray which is scooped off the ground by the seedling tray spade to the seedling tray frame. In the rice tray growing seedling growing tray shipping machine, the vertical-type folding seedling tray spade is adopted to scoop up the seedling tray, when the seedling tray is off the ground, carried mud is reduced, the work resistance is reduced, and thus the seedling tray is conveniently scooped up. A shipping belt with the combination of a straight line section and an inclined section is adopted to deliver the seedling tray, the seedling tray frame is arranged at the tail end of a delivery belt on the machine frame, and a signal is detected and transferred through a photoelectric switch to control a motor to run. The rice tray growing seedling growing tray shipping machine is smooth in shipping, simple in structure, flexible in use, high in working efficiency, and accurate in control.

The invention discloses a self-seeking bionic intelligent lifebuoy. The lifebuoy is charged by solar energy and is in the shape of a long strip, which can be connected end to end to form a circle. It is designed in sections, and if one section is damaged and leaks air, the whole can still be used. The design of water pressure sensor and electromagnetic drop switch ensures automatic unlocking when the ship sinks. The solar panels are designed to be self-sufficient in electricity. The design of power motor, steering gear and navigation piece realizes the self-navigation function of the life buoy, and can change direction flexibly. The design of the sensor module plus the face recognition camera realizes the self-search function. The GSM+GPS module realizes the positioning function and sends the location information to the lifebuoy operating company for help. The wireless transceiver realizes the communication with the remote control, personnel communication, and sends a radio wave distress signal to nearby ships. The display screen can display the position, time, battery information, rescue guidance, and introduction of the structure and function of the life buoy. The remote control can cooperate with rescuers to provide precise guidance, and the operation interface is simple.

The invention relates to the technical field of bionic robots, in particular to a snake-shaped robot. The snake-shaped robot comprises joint modules, a snake tail and a snake head, wherein the joint modules are in series connection; the snake head is mounted at the end portion of the joint modules in a traveling direction; the snake tail is mounted at the rear end of the joint modules; the joint modules include joints, a first steering gear, a first transmission shaft, a first gear set, a second steering gear, a second transmission shaft, a second gear set, a cross connector, a bellows and a side pulley set; the first steering gear (12) drives the first transmission shaft (13) to rotate around a connecting hole of a transverse connecting plate (113); and the second steering gear (15) drives the second transmission shaft (16) to rotate around a connecting hole of a vertical connecting plate (112). The snake-shaped robot is more flexible and applicable to various working fields, and achieves various movements; the bellows and the side pulley set are arranged, and the pulley protrudes from the bellows to reduce the forward resistance while protecting an internal mechanism.

The invention belongs to a component of a boat or a ship, and particularly relates to a paddle for a boat or a ship. The paddle is characterized in that the included angle of a paddle rod and a paddle back is 3-20 degrees; the contacting surface of a handle of the top part of the paddle rod and the palm surface is processed into an arc-shaped surface coincided with the palm surface; a paddle neck of the paddle rod is processed into an oval cross section; and the contact surface of the handle and fingers or the smooth surface is provided with a finger groove. The paddle has the advantages that: 1. when a paddle blade is in water, the upper part of the paddle blade can set a supporting point fast in water; 2. when in paddling, the angle of the paddle and the force of the arm are effectively combined in the process of paddling period, and an optimum force-applying angle can be formed; when being out of water, since the angle of the paddle is beneficial to lift the paddle, the forward resistance of the boat can be reduced; 3. the paddle neck is made into an oval shape, and on the basis of increasing the strength of the paddle rod, the paddle-pushing gesture is changed, thus being beneficial to the transmission linkage by which the muscle applies force on the paddle of the boat; and 4. the change of the handle of the paddle leads the hand feeling to be more comfortable and is more consistent with the physiological characteristics of the hand.

The invention discloses a grabbing type sampling device, which comprises a driving device, an inner transmission shaft, an inner pulling shaft, an outer barrel, a sampling barrel and a claw; the output shaft of the driving device is provided with an input gear; the inner transmission shaft is provided with an inner transmission shaft input gear meshed with the input gear and is further provided with an inner transmission shaft output gear; one end of the inner pulling shaft is provided with an inner pulling shaft input gear that is axially limited and meshed with the inner transmission shaft output gear while the other end of the inner pulling shaft is provided with a plurality of racks; the inner pulling shaft input gear is matched with the inner pulling shaft by screw threads; the outerbarrel is sleeved at the outer side of the inner pulling shaft; the sampling barrel is arranged at the lower end of the outer barrel; the rack extends into the sampling barrel; the claw can be arranged on the sampling barrel in rotatable manner; the number of the claws is the same with that of the racks; and the claw is provided with a turning gear meshed with the rack. The grabbing type samplingdevice provided by the invention solves the problem that the helical sampling device cannot collect high-density or low-density materials, such as pellet, sawdust and the like.

The invention relates to a multifunctional test bench for a plucking chain type sunflower header test. The multifunctional test bench for the plucking chain type sunflower header test comprises a feeding mechanism, dividing mechanisms, a plucking mechanism, a cutting mechanism, a conveying mechanism and a controller, wherein the feeding mechanism is used for driving plant fixing devices to move and then conveying plants to the cutting mechanism, the plant fixing devices are used for placing the plants, wherein the spacing between adjacent plant fixing devices can be adjusted; the dividing mechanism are arranged in parallel one another at equal intervals and the spacing between adjacent dividing mechanisms can be adjusted, and both the positions of the cutting mechanism and the conveying mechanism can be adjusted; the controller is used for controlling and storing the speeds of the feeding mechanism and the plucking mechanism and the speed and the torque of the cutting mechanism. The multifunctional test bench for the plucking chain type sunflower header test disclosed by the invention can simulate harvesting for the plants with different row spacings and tests influence of the speeds of the plucking mechanism, the cutting mechanism and the conveying mechanism on the harvesting effect, the spacing of two cutters on the harvesting effect and the positions of the cutters and theconveying mechanism on the harvesting effect, thereby being rich in functions and further being capable of realizing 'one machine multi-purposes'.

The invention discloses an under-ice detection system based on a capture remotely-operated vehicle (ROV) and suitable for ice hole laying and recovery. The under-ice detection system can enter water through an ice hole with the limited hole diameter, and comprises a load-bearing cable, a connecting bin, the capture ROV and an under-ice detection autonomous underwater vehicle (AUV); the load-bearing cable is used for being hung in the ice hole to lift upwards and lower the under-ice detection system; the connecting bin is fixedly connected with the load-bearing cable driving the connecting binto move, and used for underwater collecting and expanding of the capture ROV and charging endurance and data communication of the under-ice detection AUV; the capture ROV is connected with the connecting bin to be combined into a cylindrical overall structure capable of moving in the ice hole with the limited hole diameter, and can be disengaged from the connecting bin underwater to collect a water sample or sediment and connect the under-ice detection AUV; and the under-ice detection AUV is used for being disengaged from the capture ROV underwater to conduct underwater detection or being connected and fixed into the capture ROV to be movably recovered into the connecting bin along with the capture ROV for charging endurance and data communication. The under-ice detection system does not collide with the wall face of the ice hole, thus parts are not damaged, the detection time of the system under ice is prolonged, the detection range of the system under the ice is enlarged, and the detection efficiency is improved.

The invention provides a suspension type permanent magnet suspension train bogie. The bogie comprises a bogie frame, a hanging device, a guide device and a brake device. The bogie can establish a space rectangular coordinate system by taking the center of the bogie as an original point; the forward direction of the bogie is taken as the X-axis forward direction; the left-right deviation directionof the bogie is used as the Y axis, the up-down suspension direction of the bogie is used as the Z axis, only the moving freedom degree of the bogie in the X-axis direction is reserved in the six directions of the space, and devices capable of adjusting the running posture of the bogie are arranged in the other directions. Therefore, stable running of a train can be guaranteed from multiple dimensions.

The invention relates to a self-advancing type high-pressure jet sprayer for radial horizontal well drilling, which mainly comprises a shell, a turbine rotor, wear-resistant steel balls, a baffle plate and the like. The self-advancing type high-pressure jet sprayer is technically characterized in that a tip, a forward spray nozzle and a backward spray nozzle are processed on the shell, hard alloy is welded on the outer surface of the shell, the turbine rotor is mounted in the shell, spherical grooves are processed at the upper end and the lower end of the turbine rotor, the turbine rotor is positioned via the upper wear-resistant steel ball and the lower wear-resistant steel ball, the upper wear-resistant steel ball is placed between the inside of the shell and the corresponding spherical groove of the turbine rotor, the lower wear-resistant steel ball is placed between the turbine rotor and a spherical groove on the baffle plate, the shell is connected with the baffle plate in a threaded manner, and four to six water injection holes are uniformly distributed on the baffle plate. The self-advancing type high-pressure jet sprayer is simple in structure and reliable in work, and can be widely applied to radial horizontal well drilling operation.

The invention relates to a high-speed silent life car for a lift. The high-speed silent lift car comprises a connecting lift car, wherein the connecting lift car comprises a movable fairing which consists of a fixed shield, multiple steering engines and a movable deformation cover; the fixed shield is arranged on the connecting lift car; the multiple steering engines are evenly distributed on thefixed shield; the movable deformation cover is formed by inserting and overlapping a plurality of fan-shaped plates; the lower end of each fan-shaped plate is fixed on the corresponding steering engine; each steering engine consists of a steering engine base, a balance wheel and a driving mechanism; the steering engine bases are fixed on the fixed shield; the balance wheels are arranged in the steering engine bases; the upper edges of the balance wheels and the lower ends of the fan-shaped plates are fixed; and the balance wheels are connected with the driving mechanisms. By adopting the technical scheme in the invention, when the lift car runs in different directions at a high speed, the shape of the lift car is correspondingly changed, thus reducing the advancement resistance, completely eradicating or lowering generation of eddy currents, ensuring interference-free running of the lift car for the lift, having no noise, and achieving the purpose of a silent lift car.

The invention discloses a roadbed compaction degree detecting device which comprises a base plate and a hydraulic cylinder. A downwards-pressing plate is fixed to the output end of the hydraulic cylinder, a long stand column is fixed to one end of the lower surface of the downwards-pressing plate, a fixing barrel is arranged at the other end of the lower surface of the downwards-pressing plate, a short stand column is connected to the output end of a motor, and the long stand column and the short stand column penetrate through holes to extend in the vertical direction and in the direction, far away from the lower surface of the downwards-pressing plate, of the base plate; the axial length of an extending section of the long stand column is larger than that of an extending section of the short stand column, and a bothway air cylinder is arranged in the middle of each small hole; heading ends are installed at the two output ends of each bothway air cylinder and are provided with blind holes, and travel switches are embedded into the upper surfaces of stopping blocks. The device for detecting the compaction degree of different compaction layers is designed by the applicant, the sampling accuracy is guaranteed, it is guaranteed that roadbed compaction meets the related construction requirement, and the aim of prolonging the service life of a roadbed and pavement engineering is achieved.

The invention discloses a sludge drying treatment system, and solves the problems in the prior art that the continuous pyrolysis treatment on sludge can not be realized by using the sludge drying treatment system, the sludge feeding and taking process is complex, and the large-scale production and treatment are hard to realize. The sludge drying treatment system comprises a sludge storage tank, a high-pressure sludge pump, an internal spiral low-temperature pyrolysis device and a filter press which are connected through pipelines in sequence, wherein a pressure gauge and an adjusting valve are arranged on the pipeline between the internal spiral low-temperature pyrolysis device and the filter press; the pressure gauge is positioned in front of the adjusting valve. By utilizing the sludge drying treatment system, the continuous pyrolysis on the wet sludge is realized, the production efficiency is high, the energy consumption is low, and the operation is convenient and rapid. The invention further discloses a sludge drying treatment process. A dehydration prompting agent is added in the low-temperature high-pressure pyrolysis process, so that the process steps are simplified, the dehydration property of the sludge is greatly improved; when the sludge is mechanically hydrated by using the filter press, the water content of the sludge meets the requirements that the sludge can be fed into an incineration furnace, and the sludge does not need to be further dried.

A ship able to generate an air bubble cushion to decrease water resistance is composed of ship body, engine, drive system, direction control system, blowers, compressed air tanks, air feeding tubes and their controller, and air bubble generators.

The invention relates to the technical field of medical equipment, in particular to a rotary cutting device. The rotary cutting device comprises a cutting assembly extending into a blood vessel for cutting, a driving device for driving the cutting assembly to move and a protective casing arranged relative to the cutting assembly, and the head of the cutting assembly is located on the inner side ofthe protective casing relative to the extending direction of the blood vessel. The rotary cutting device has the advantage that the inner wall of the blood vessel is not damaged during the rotary cutting process.

The invention discloses a self-propelled high pressure water jet drill mainly comprising a bit body, turbine rotors, an upper wear-resistant steel ball, a lower wear-resistant steel ball and a baffle.The self-propelled high pressure water jet drill is characterized in that a blind hollow shaft is arranged in the center as a support; an annular outlet is disposed on the blind hollow shaft; the front end of the blind hollow shaft is connected to the front end of the bit body; a forward nozzle and a backward nozzle are arranged on the bit body; both sides of the left and right side of the blindhollow shaft are symmetrically installed with the turbine rotor; both ends of the upper and lower end of the turbine rotor are processed with a spherical groove; with the upper and lower wear-resistant steel balls used for positioning, the upper wear-resistant steel ball is placed between the bit body and the spherical groove of the turbine rotor, and the lower wear-resistant steel ball is placedbetween the turbine rotor and the spherical groove of the baffle; the bit body and the internal baffle thereof are connected through screw threads. The self-propelled high pressure water jet drill hasthe advantages of realizing rapid continuous drilling of long holes in various rock formations, and having simple structure, reliable work and wide application prospects.

The invention discloses a ballast leveling mechanism for leveling a ballast bed, which belongs to railway maintenance equipment. The mechanism comprises a ballast leveling plough rack, an eccentric shaft component, a cross beam component and a connecting rod component, wherein first hammer holes are respectively formed in two plough blades, and the positions of the corresponding first hammer holes in the two plough blades are corresponding; the ballast leveling plough rack also comprises two hammer hole plates and a middle framework, second hammer holes are respectively formed in the hammer hole plates, and the positions of the second hammer holes correspond to the positions of the corresponding first hammer holes in the plough blades; the middle framework is positioned between the two plough blades and is fixedly connected with the two plough blades; the eccentric shaft component comprises an eccentric shaft; the cross beam component comprises one or more cross beams, and each cross beam comprises a left vibratory hammer, a right vibratory hammer and connecting plates, wherein the left vibratory hammer and the right vibratory hammer are respectively inserted into the corresponding second hammer holes in the hammer hole plates and the corresponding first hammer holes in the plough blades in a sliding fit manner; and the eccentric shaft is connected with the cross beam component in a driving manner through the connecting rod component. The mechanism has the characteristics of small ballast leveling resistance, and high ballast leveling efficiency.