85results about How to "Improve space adaptability" patented technology

Multiple-refrigeration Middle-delivery aerial condenser belongs to thermodynamic equipment technology domain. It composes of multi stages, and every stage is connected by the channels; every stage has two flow stages in which the steam floats to opposite direction; the air input is connected with the first channel , and the first channel is connected with the second channel by a row of parallel distribution heat exchange tube of the first stage; the second channel is connected with the heat exchange tube of next stage; apostrophe ,until get to the last channel; there are fins set out of the heat exchange tube; the shell is set out of the heat exchange tube and fins. The steam is put into the heat exchange tube of the first stage to refrigerate through the steam input and the first channel, and the air-liquid mixture flows into channel, and then the liquid and the air are separated; the steam gets into the heat exchange tube of next stage. This invention is suitable for large power engineering refrigeration, and it has efficient condensation capacity and large coefficient of heat transmission; the heat transfer area of the equipment is made use of sufficiently and efficiently; the fabric is flexible and smart, the applicability of the space is high.

The invention discloses a rolling compounding method for an aluminum / magnesium / titanium three-layer composite plate. The characteristics of high strength of titanium alloy, low melting point and good vibration reducing performance of magnesium alloy, good plasticity and space adaptation of the aluminum alloy, and the like, are utilized and the excellent characteristics of respective component metals are combined by the aluminum / magnesium / titanium three-layer composite plate provided by the invention, so that the high-speed impact damage resisting property which the component metals do not own is acquired. Through the control on the ratio and interface of the aluminum alloy, the magnesium alloy and titanium alloy, the degree of fragmentation, melting and atomizing of shred cloud after the buffer composite plate is subjected to high-speed impact is changed and adjusted, so that the form of the shred cloud is changed, the degree of impact damage to a backplate is reduced, and the high-speed impact damage resisting property is increased. The aluminum / magnesium / titanium three-layer composite plate is applied to an outer layer buffer plate in an outer layer protecting structure of an aerospace vehicle and can be used for replacing a traditional single aluminum alloy material. The space environmental effect and protecting level of the space vehicle are increased; the design level of the space vehicle are greatly promoted, and the service life of the space vehicle are greatly prolonged.

A waveguide port radio frequency coaxial cable component can realize connection of different waveguide ports or reliable connection of a waveguide port with a radio frequency coaxial port and is suitable for microwave systems with a waveguide port connection. The cable component comprises a terminating waveguide port connector and a radio frequency coaxial cable. The end of the cable component is designed as a standard waveguide port matched with a system. When the cable component is used, a user can directly connect the waveguide port of the cable component with a system waveguide port, so that the cable component is convenient to use. Due to the fact that the coaxial cable is bendable and can satisfy the requirements of optional lengths, connection between waveguide ports at optional positions can be realized. Compared with the original manner that the radio frequency coaxial cable component is matched with a waveguide coaxial converter, part number introduced to the system is reduced, two port sections with discontinuous impedance are omitted, system performance and reliability are improved, and high feasibility and practicability are achieved.

The invention relates to an SNCR (selective non-catalytic reduction) and ozone flue gas denitrification device. The device comprises a boiler (1), wherein an air preheater (2) and a boiler economizer (4) are arranged in the boiler (1), the air preheater (2) is arranged above the boiler economizer (4), a spray gun area (3) is arranged between the air preheater (2) and the boiler economizer (4), an atomization area of the spray gun area (3) is an SNCR reaction area, an air outlet of the air preheater (2) is connected with a flue gas delivery pipeline (7), the other end of the flue gas delivery pipeline (7) is connected with an inlet end I of a mixer (5), an inlet end II of the mixer (5) is connected with an ozone generator (6) of an ozone delivery pipeline (8), and an outlet end of the mixer (5) is connected with a reacted gas delivery pipeline (9). The device is high in denitrification efficiency and low in investment cost, requires less equipment and has the advantages that the investment is saved and site limitation is avoided, and the project cost and the running cost are reduced.

The invention discloses a space manipulator kinematics parameter on-orbit calibration method based on binocular vision. Main equipment comprises a space manipulator and a calibration device which arefixed on the outer side of a space station cabin body, and the posture change relation between the space manipulator and the calibration device is known. The calibration device is provided with a binocular space camera and a system controller. The calibration method comprises the steps that a kinematic model of the space manipulator is established according to the joint configuration of the spacemanipulator; a space manipulator kinematics parameter calibration model is established according to the kinematic model of the space manipulator; the system controller sends an instruction to the space manipulator to make the space manipulator uniformly run to 50 position points; at each position point, the system controller reads the joint angle of the space manipulator, and the binocular space camera measures the tail end position of the space manipulator; the system controller calculates the corrected kinematics parameters; and the system controller transmits the corrected kinematics parameters to the space manipulator. The method has the characteristics of being high in automation degree, good in space environment adaptability and the like.

The invention puts forward an imaging adjustment unit and a focusing and leveling control system using the unit. The focusing and leveling control system comprises a lighting unit, a marking plate, a projection imaging unit, a detector and a controller. The lighting unit generates light beams which pass through a plurality of marks on the marking plate so as to form multiple incident rays projecting images on a silicon chip surface, so that several marked projections come into being. And the marked projections are reflected by the silicon chip surface, thus forming multiple reflected rays projecting images on the detector which controls the movement of a workpiece table. And the imaging adjustment unit includes a first imaging adjustment unit located in the optical path of the incident rays and a second imaging adjustment unit located in the optical path of the reflected rays. Wherein, the first imaging adjustment unit adjusts the optical length of the incident rays for focusing them simultaneously on the silicon chip surface, and the second imaging adjustment unit adjusts the optical length of the reflected rays for focusing them simultaneously on the detection surface of the detector. The imaging adjustment unit provided in the invention has a simple structure and is convenient for installation.

The invention provides a preparation method of a two-dimensional material solid lubricating film. The preparation method comprises the following steps of coating the surface of a workpiece with a two-dimensional material dispersion liquid, drying the workpiece after coating, and carrying out adhesion promoting treatment on the workpiece after drying to obtain the two-dimensional material solid lubricating film on the surface of the workpiece. The preparation method has the advantages of low cost, wide source of raw materials and the like. The prepared film is controllable in thickness, high instability, good in adhesion property, good in mechanical property, compact and uniform, smooth in surface, high in purity, and small in friction coefficient, and maintains excellent lubricating performance under extreme conditions of ultra-high vacuum, high speed, high temperature, high pressure, heavy load and the like; and the prepared film has good application prospects in the industrial manufacturing fields of machining, aerospace, materials, optoelectronic devices and the like.

The invention discloses a high-voltage resistant connector device. A plug consists of a plug shell and a plug interior insulation component positioned in the plug shell. The plug interior insulation component consists of an interface sealing pad, a plug insulator, a plug cover plate, a plug sealing line body, a plug positioning claw and a plug rubber ring. The device can be applied to high-voltage signal transmission in an atmospheric pressure environment of a sea level to a 100 pa atmospheric pressure environment. An electrical pathway between contact parts is sealed to realize the high-voltage signal transmission under low pressure. The device is particularly applied to severe environments of high voltage, ultrahigh voltage, high current, great temperature difference, strong radiation and the like, and has considerable economic benefits.

The invention belongs to the technical field of an electromechanical actuator, and provides a modular parallel type electromechanical actuator having the advantage of compact structure, concise transmission and simple assembly debugging. The modular parallel type electromechanical actuator comprises a servo motor (1), a gear reducer (2), an electromagnetic lock (3), a ball screw assembly (4) and a bolt assembly (5). An output shaft of the servo motor (1) is connected with a small gear shaft of the gear reducer (2), a large gear shaft of the servo motor (1) is connected with an input shaft of the ball screw assembly (4), the servo motor (1) and the ball screw assembly are arranged in parallel, and the electromagnetic lock (3) is installed on a housing of the gear reducer (2). Functions between the various function modules are independent, interfaces are clear, and an electromechanical actuator having complete functions can be formed through simple combinations. The modular parallel type electromechanical actuator has the advantages of high universality between the modules, simple assembly, high production efficiency and convenient fault positioning, is suitable for batch production, and greatly improves maintainability and supportability of a system.

The invention provides a phase change heat storage-type instant heat pump miniature water heater used for providing sufficient hot water for users in time. The phase change heat storage-type instant heat pump miniature water heater is characterized in that the miniature water heater comprises a water tank unit, a thermal storage heating unit, a heat pump heating unit, a signal measuring unit, a protection unit and a control unit; the water tank unit is provided with a water tank used for storing water, a safety valve arranged at the top of the water tank, an electromagnetic valve arranged on awater inlet pipeline of the water tank and a current equalizer arranged at the water inlet position of the inside of the water tank; the thermal storage heating unit comprises a plurality of thermalstorage material layers which are perpendicular to the extension direction of the water tank and are further arranged inside the water tank at certain intervals; the heat pump heating unit comprises acompressor, a condenser, a drying and filtering device, a throttling part and an evaporator which are connected in sequence; the signal measuring unit comprises a plurality of temperature sensors which are distributed on the tank wall of the water tank in the extension direction of the water tank, a water level gauge which is connected with the water tank in parallel and pressure sensors which are arranged at the two ends of the compressor; and the protection unit sends out an alarm or executes protection operation according to the detection result of the signal measuring unit.

The invention belongs to the field of automated guided vehicles, particularly provides an AGV (Automatic Guided Vehicle) trolley capable of walking in any angle direction and aims to solve the problem that the conventional AGV trolley inconveniently operates in a narrow space because of minimum turning radius. The AGV trolley capable of walking in any angle direction comprises a trolley body and four driving units, wherein the driving units are fixedly connected to the trolley body via crossed roller bearings; each driving unit is composed of two groups of driving motors; driving wheels are arranged on output shafts of the driving motors; two driving wheels are symmetrically arranged on two sides of an axle center of each bearing; one of the driving wheels on the two sides rotates forwards while the other of the driving wheels on the two sides rotates backwards, the driving units can rotate around the bearings; when the two driving wheels rotate in the same direction, the driving units drive the AGV trolley to move. The AGV trolley is capable of walking in any angle direction, so that the AGV trolley can operate in extremely narrow space and has extremely strong space adaptability.

A mixed joint continuous robot is provided with a substrate (1), a rotary joint, a continuous joint, a motor and a reducer, and the mixed joint continuous robot is characterized in that a primary rotary joint, a secondary rotary joint, a primary continuous joint (10) and a secondary continuous joint (12), which are installed on the substrate (1), are connected with one another in series, the primary rotary joint and the secondary rotary joint are respectively provided with a rotational degree of freedom, the primary continuous joint (10) and the secondary continuous joint (12) are respectively provided with two bending degrees of freedom, and the mixed joint continuous robot has six degrees of freedom. The mixed joint continuous robot is strong in adaptability to the non-structuralized operation space and widely applicable to the fields of disaster rescuing and non-structuralized industrial environmental operation.

The invention proposes an interior tool box for a truck, comprising an independent tool box body, which is installed on an automobile floor under the truck seat through an installation bracket. The tool box body comprises a box frame body, a rear box plate, a front door frame and a box door. The box frame body is a rectangular frame with openings on the front and rear parts. The rear box plate is connected with the rear side of the box frame body to seal the rear opening. The front door frame is connected with the front opening of the box frame body. The box door is hinged on the front door frame. The box door is provided with a lock which is locked with the front door frame. The invention has the advantages of simple structure, convenient moulding and manufacturing procedures, strong space adaptability, user access convenience, high leakproofness and moisture resistance.

The invention discloses a transfer system and method for a radioactive waste bin. The transfer system comprises a horizontal transfer system and a space handling system; the horizontal transfer systemis used for horizontally transferring the radioactive waste bin from the position S1 to the position S2; and the space handling system is used for handling the radioactive waste bin from the positionS2 to a designated storage point S3 and / or transporting the radioactive waste bin from the storage point S3 to another storage point S4. The space handling system includes a lifting device, the lifting device includes a hanger, the center of the hanger is of a hollow structure, the lower end of the hollow structure is provided with an opening, and the opening allows the upper end of the radioactive waste barrel to extend into the hollow structure.

The invention discloses a special maintenance sliding plate for automobile maintenance, and relates to the technical field of automobile maintenance. The special maintenance sliding plate for automobile maintenance comprises an upper body support unit, arm support units, a hip support unit and leg support units, wherein the hip support unit comprises an installation pipe; the upper body support unit comprises a base plate fixedly connected with the upper part of the front side surface of the installation pipe; an upper body support plate is rotatably connected to the front end of the base plate; the arm support unit on the left side comprises an installation plate fixedly connected with the left side of the upper body support plate; a ratchet wheel is fixedly connected to the left part ofa main shaft; a locking claw is rotatably arranged on the left end surface of the installation plate through a damping spring hinge; the leg support unit on the left side comprises a main support plate rotatably arranged in the middle of the rear side surface of the installation plate; and assistant support plates are slidably arranged in through slots. The special maintenance sliding plate for automobile maintenance provided by the invention has the beneficial effects of convenience in movement, capability of providing stable positioning at the same time, convenience for maintenance personnelfor applying force, and capability of providing favorably and convenient-to-adjust support for a body and arms.

The invention relates to a manned robot mechanism for rescue, and the mechanism comprises a seat support mechanism, a leg power mechanism, a front leg mechanism, a rear leg mechanism and a walking mechanism; all the mechanisms are mutually connected to form a whole manned robot mechanism; the seat support mechanism comprises a seat surface, a backrest plate, a leg baffle, a tooth-shaped belt pulley and a tooth-shaped belt; the leg power mechanism is deployed below the seat support mechanism; one end of a front support leg is fixedly connected with the front leg swinging shaft of the leg power mechanism; one end of a rear support leg of the rear leg mechanism is fixedly connected with the rear leg swinging shaft of the leg power mechanism, and the other end of the rear support leg is provided with front and rear wheels; the walking motor of the walking mechanism is fixedly connected with the rear support leg of the rear leg mechanism. According to the manned robot mechanism for rescue, a transport for transporting patients in various environments during a rescue process is provided, so that the labor intensity of the rescuers is reduced, the space adaptability is strong, the rescue efficiency can be greatly improved, and the pain of the patients is reduced.

The invention discloses 3D printing Lego type space embedding and buckling brickworks and a structure building manner. The space embedding and buckling brickworks are of mortise and tenon structures,and multiple embedding convexes, embedding concaves corresponding to the embedding convexes and multiple hole ways for connecting the space embedding and buckling brickworks are arranged on the spaceembedding and buckling brickworks. The invention further discloses a building manner of a wall body formed by the Lego type space embedding and buckling brickworks. The building manner includes the following steps that (1), the space embedding and buckling brickworks are designed through digital modeling; (2), 3D printing is carried out according to the designed space embedding and buckling brickworks, and the multiple space embedding and buckling brickworks are obtained; and (3), the multiple space embedding and buckling brickworks are combined, and the multiple space embedding and buckling brickworks are tensioned in the manner that ribs / lines / ropes pass through the hole ways to form an overall structure. The brickworks are in space multidirectional convex and concave mortise and tenon embedding and buckling, space structures are overall connected in the manner that the ribs penetrate through the reserved hole ways, and the force bearing performance, the anti-seismic performance andthe anti-knock and anti-impact resistance of the wall body formed by the brickwork structures are effectively improved.

The invention provides a work bin handling system and method using a lifting robot. The work bin handling system comprises a scheduling system, a task management system, a robot and a lifting device;the scheduling system is connected with the task management system, receives a work bin handling task from the task management system, plans the travel route of the robot and dispatches the rising andfalling of the lifting device; the lifting device is controlled to rise and fall by the scheduling system to carry and transport the robot; and the robot is provided with a fork taking mechanism anda fork rod lifting frame, when the robot takes and places cargos, the fork rod lifting frame is heightened, and when the robot walks with the cargos and enters and exits the lifting device, the fork rod lifting frame is lowered. The work bin handling system has the advantage that the height of the handling robot can be adjusted, and a lifting mechanism is lowered to the lowest area when the robotmoves with the load, so that the center of gravity of the robot is closer to the ground, and the robot can move at a higher speed; and when passing through a space with a limited vertical height, therobot can pass smoothly and the space adaptability is better.

The invention discloses an ultrasonic car washing system and a commercial mode thereof, and relates to the field of automobile service. The ultrasonic car washing system can avoid car washing liquid and achieve zero pollution to the environment; through a car cleanliness calculation system, the accurate control of the car cleanliness is achieved, and the car washing cost and resources are effectively saved. In a whole car washing process, except water, no other substances are in contact with the car, so that the vehicle paint is effectively protected. Main equipment are arranged on the groundand a ceiling, and the car cleanliness calculation equipment and the ultrasonic transmitting and receiving equipment can be designed in a modular mode, so that the space adaptability is extremely strong. And the labor cost is effectively saved. The reservation system of the commercial mode of the ultrasonic car washing system can save the car washing time of consumers. After a car washing shop adopts an automatic car washing machine, the requirements of low-end consumers can be completely met by the machine, and people only serve as compensation for the machine when the requirements of the consumers are high. Thereby the human resources and the cost are effectively saved.

The invention relates to a logistic vehicle chassis capable of moving along a spatial track and a movement method, and belongs to the technical field of logistics. The logistic vehicle chassis comprises three-section type vehicle bodies, the spatial track (5) and a driving system (4). The first-section vehicle body (1) and the third-section vehicle body (3) are connected with the second-section vehicle body (2) through revolute pairs (16). A grooved wheel frame swing arm (11) is connected to the front portion and the rear portion of the first-section vehicle body through the revolute pair, a grooved wheel frame swing arm (11) is connected to the front portion and the rear portion of the second-section vehicle body through the revolute pair, and guide grooved wheels (10) which are constrained by the inner edge of an opening of the spatial track are installed at the ends of the grooved wheel frame swing arms (11), and are connected with the grooved wheel frame swing arms (11) through the revolute pairs. A pair of bearing wheels (8) is installed on the first-section vehicle body, and a pair of bearing wheels (8) is installed on the second-section vehicle body. Frictional driving force can be generated between a driving wheel (22) installed on the first-section vehicle body (1) and the pressure-bearing surface of the spatial track (5) under the combined action of a pressure adjusting spring (14), a stress application lever (15) and the bearing wheels (8). The logistic vehicle chassis capable of moving along the spatial track is applicable to the field of localized track logistics with the limitation requirement for the arrangement space.

The invention discloses a spraying robot. The spraying robot comprises a machine frame, a spraying mechanism, a position adjusting mechanism and a turnover mechanism, wherein the spraying mechanism isarranged on the machine frame, the spraying mechanism comprises a nozzle assembly used for spraying paint, the position adjusting mechanism is used for adjusting the position of the nozzle assembly,the nozzle assembly is arranged on the position adjusting mechanism, the turnover mechanism is connected with the position adjusting mechanism and the machine frame, and the turnover mechanism can drive the position adjusting mechanism to overturn up and down. According to the spraying robot, the turnover mechanism is connected with the machine frame and the position adjusting mechanism, and the turnover mechanism is designed to drive the position adjusting mechanism to overturn up and down, therefore, under the condition that the robot entrance and exit field space is limited, the position adjusting mechanism can be driven by the turnover mechanism to be turned downwards to reduce the height of the whole robot so that the robot can adapt to the height of the entrance and exit field space,and the adaptive capacity of the robot entrance and exit field space is improved; when the spraying operation is carried out, the position adjusting mechanism can be driven by the overturning mechanism to be turned upwards to achieve a high spraying range, and application requirements of multiple occasions of the same type are met.

The invention discloses a device for controlling active postures in postures of a high speed aircraft, particularly relates to an inlaid type laminate side-spraying nose cone which comprises a circular bottom table, wherein a ball-cone shaped sweating laminate superposed body is arranged on the top surface of the circular bottom table, a bottom table sweating main passage for leading cooling working medium into the sweating laminate superposed body and a fixing rod penetrating through the bottom table sweating main passage and the sweating laminate superposed body are arranged in the center of the circular bottom table; a side spraying mechanism is additionally arranged between the circular bottom table and the laminate superposed body, and a side spraying runner for spraying a side spraying working medium onto the outer side of the laminate superposed body is arranged in the side spraying mechanism; a side spraying passage for leading the side spraying working medium into the side spraying runner is arranged on the circular bottom table. Since the inlaid type laminate side-spraying nose cone is formed through spreading and superposition of laminates with etched the side-spraying runner, the requirements of control on the postures of the aircraft can be met, the effect of controlling on side spraying flow is also realized, and the inlaid type laminate side-spraying nose cone has a simple structure, is light in weight and has a strong space adaptability.

The invention discloses a multi-degree-of-freedom high-precision motion platform based on a few-branch-chain mechanism. The multi-degree-of-freedom high-precision motion platform comprises a static platform, four telescopic motion branch chains, a movable platform and four same piezoelectric inertial drivers. The static platform and the movable platform are connected through a flexible ball pair and a flexible hooke joint, and the motion branch chains are actuated by linear inertial piezoelectric actuators with a displacement sensing function. The actuator comprises a proportional linear Hall sensor, an actuating body, a motion unit, a cylindrical shell, a permanent magnet and a base. According to the four-degree-of-freedom platform, the flexible hinges are adopted to replace traditional kinematic pairs, the four-degree-of-freedom platform has the advantages of being easy to achieve equipment miniaturization, improving repeated positioning accuracy, being high in motion sensitivity and the like, meanwhile, the platform can reach a static stable state, and the problems of vibration and collision in the transportation process are solved. Large-stroke feeding motion of the platform is achieved through macro motion, and precise positioning is achieved by means of micro motion. And the platform is endowed with large-stroke and high-precision macro-micro motion capability.

The invention belongs to the technical field of shell machining, and discloses a method for machining multiple holes in a large-sized global shell. The method includes the steps that a three-dimensional space coordinate system of the large-sized global shell is established, and three-dimensional data of the large-sized global shell are measured; position coordinates of a machining system in the three-dimensional space coordinate system are determined; a machining theoretical model of the large-sized global shell is compared with the three-dimensional data of the large-sized global shell to obtain machining coordinates based on the three-dimensional space coordinate system; the machining system is moved, and the holes are formed in the large-sized global shell based on the machining coordinates; and the steps are repeatedly executed, and the next holes are machined. The method for machining the multiple holes in the large-sized global shell is specially used for large-diameter specifications and is high in precision requirement.

The invention relates to a steel bridge deck U-rib butt joint fatigue strengthening structure and method based on bonding. The strengthening structure comprises a fiber reinforced composite material layer wrapping a U-rib butt joint and a bonding layer arranged between the fiber reinforced composite material layer and the U-rib butt joint. The strengthening method comprises the steps of surface treatment, fiber reinforced composite material adhesion and maintenance. Compared with the prior art, a steel bridge deck U rib butt joint is subjected to fatigue strengthening through an adhesive and the fiber reinforced composite material, the stress amplitude of a structural damage part can be effectively reduced, expansion of fatigue cracks is inhibited, and the structural fatigue life is greatly prolonged; the strengthening structure improves the stress condition of a defect part of an original structure without weakening the rigidity of the cross section and introducing a new fatigue source; the strengthening structure adopts an adhesive combination mode, is simple and convenient to construct, and has high space adaptability to strengthening of weld cracks and uneven conditions such asfolded plates and curved surface steel plates.

The invention relates to the technical field of gas-liquid separator parts, and in particular relates to a self-circulation two-stage axial gas-liquid separation cyclone tube. The self-circulation two-stage axial gas-liquid separation cyclone tube comprises a first straight tube section, a second straight tube section, a first flare tube section and a second flare tube section, wherein the first straight tube section is internally provided with two fixed cross blades used for converting axial-flow fluid into rotational-motion fluid; two ends of the first flare tube section are respectively flared, the tail end of the first straight tube section is inserted into the front end of the first flare tube section and is fixed therein through a U-shaped weld assembly, the front end of the second flare tube section is tubular, the tail end of the second flare tube section is flared, and the front end of the second flare tube section is inserted into the tail end of the first flare tube section and is fixed therein through a U-shaped weld assembly; the front end of the second straight tube section is inserted into the tail end of the second flare tube section and is fixed therein through a U-shaped weld assembly. The self-circulation two-stage axial gas-liquid separation cyclone tube is greatly enhanced in space adaptability, decreased in pressure drop and especially suitable for down hole and offshore platforms.

The invention discloses a connector fixing assembly. The connector fixing assembly comprises a body, a substrate, connecting pieces and accessories, wherein the substrate is connected to the bottom ofthe body; a first clamping part is formed on the side surface of the body; a first clamping part is formed on one side of each connecting piece, and a second clamping part is formed on the other opposite side; a first clamping part is formed on one side of each accessory, and the second clamping part is formed on the other opposite side; the first clamping parts are matched with the second clamping parts; and component connecting grooves are formed in the body, the connecting pieces and the accessories respectively. The connector fixing assembly disclosed by the invention consists of the body, the substrate, the connecting pieces and the accessories, and any combination collocation of a plurality of accessories and connecting pieces is realized through the combination manners of the firstclamping parts and the second clamping parts, so that the connector fixing assembly is high in expansion and high in space adaptation capacity.

Multiple-refrigeration Middle-delivery aerial condenser belongs to thermodynamic equipment technology domain. It composes of multi stages, and every stage is connected by the channels; every stage has two flow stages in which the steam floats to opposite direction; the air input is connected with the first channel , and the first channel is connected with the second channel by a row of parallel distribution heat exchange tube of the first stage; the second channel is connected with the heat exchange tube of next stage; apostrophe ,until get to the last channel; there are fins set out of the heat exchange tube; the shell is set out of the heat exchange tube and fins. The steam is put into the heat exchange tube of the first stage to refrigerate through the steam input and the first channel, and the air-liquid mixture flows into channel, and then the liquid and the air are separated; the steam gets into the heat exchange tube of next stage. This invention is suitable for large power engineering refrigeration, and it has efficient condensation capacity and large coefficient of heat transmission; the heat transfer area of the equipment is made use of sufficiently and efficiently; the fabric is flexible and smart, the applicability of the space is high.

The invention relates to a railway vehicle parking braking method and a parking cylinder for implementing the method. The parking braking method comprises the specific steps that compressed air is charged into the parking cylinder, so that the parking cylinder is in an unlocking state, compressed air is charged into a brake cylinder, service braking is applied, compressed air in the brake cylinder is discharged, and service braking is relieved; the compressed air in the parking cylinder is discharged, so that the parking cylinder is in a locked state, the compressed air is filled into the brake cylinder, and parking brake is applied; and the parking cylinder is filled with compressed air, so that the parking cylinder is in an unlocking state, the compressed air in the brake cylinder is discharged, and parking brake is relieved. According to the designed parking braking method, a parking braking power source is not provided by a spring, fatigue attenuation cannot occur along with the running time of the vehicle, the braking force can be flexibly adjusted according to the load of the vehicle, and the driving safety is high.