100 results about "Partial gravity" patented technology

The invention relates to a reactive distillation device preparing trichlorosilane from mixed chlorosilane and a method for the reactive distillation device. The method comprises the following steps of: feeding mixed chlorosilane raw materials at a middle position of an upper reaction section C and a lower reaction section E, obtaining dichlorosilane on the top of a tower, and making partial dichlorosilane return to the lower part of the lower reaction section E under the gravity and serve as a feed to enter the tower; obtaining silicon tetrachloride at the bottom of the tower, and returning partial silicon tetrachloride serving as a feed to the tower through the upper part of the upper reaction section C by using a feed liquid circulating pump at the bottom of the tower; extracting a trichlorosilane product in the middle of the tower; pressurizing and heating the partial dichlorosilane extracted on the top of the tower through a compressor, performing heat exchange with the partial silicon tetrachloride extracted at the bottom of the tower, returning the heated silicon tetrachloride to the bottom of the tower for refluxing, and returning the cooled dichlorosilane to the top of the tower for refluxing through a throttling valve and the feed liquid circulating pump on the top of the tower. The traditional reactive distillation equipment and subsequent separation and purification equipment are integrated in a dividing-wall tower, the process flow is simplified, the equipment investment is saved, and energy consumption is reduced.

The invention relates to a method for precisely grinding a large-scale special type curved surface and grinding equipment thereof in the technical field of machining. The equipment comprises a lathe body component, a spherical support mainshaft mechanism, a spherical support tailstock mechanism and an abrasive wheel grinding tool mechanism, wherein the spherical support mainshaft mechanism and the spherical support tailstock mechanism are respectively and movably arranged at two sides of the lathe body component, and the abrasive wheel grinding tool mechanism is arranged at the middle part of the lathe body component. In the invention, an abrasive wheel grinding tool horizontally rotates around a vertical center line so that the rotation center of a spherical body and the rotation center of the abrasive wheel grinding tool are always maintained in a vertically crossing state in the same plane, thereby ensuring the shape precision (sphericity) of the processed spherical body and improving the surface roughness of the spherical body processed by using the abrasive tool; and the upward grinding force counteracts partial gravity of the spherical body workpiece, therefore, the load of a spherical support mainshaft system bearing is lightened, and the service life of the spherical support mainshaft system bearing is prolonged.

The invention discloses a single shaft full-physical emulated maglev stage which is mainly used for processing full-physical emulation for the control system of the spacecraft and other mobiles. The single shaft full-physical emulated maglev stage comprises a structural supporting unit, a bearing unit, an shaft directional maglev unit, a sensor unit, a gap adjusting and controlling unit and shaft surface unit. The shaft surface unit, the upper sensor, the upper magnet and the rotor potion of the bearing unit are the rotating potion of the maglev stage; the structural supporting unit, the lower sensor, the lower magnet and the stator potion of the bearing unit, gap adjusting unit are the static potion of the maglev stage; the magnetic force generated between the upper magnet and the lower magnet arranged in the shaft directional maglev unit balances the influence by the gravity to the rotating position can rotate without any frictions around the core shaft. As a free rotating stage, the invention overcomes the shortcomings of larger frictions of the general semi-physical emulated mechanical rotating stage, assuring the control system emulated object having the characteristic of automated close loop.

The invention relates to an unmanned aerial vehicle provided with an auxiliary lifting mechanism. The unmanned aerial vehicle provided with the auxiliary lifting mechanism comprises a fuselage, a load mechanism and a power mechanism, wherein the fuselage comprises a rack, a plurality of wing arms arranged on the rack, rotor wing devices arranged at the two ends of the wing arms and a control mechanism arranged on the rack, and each rotor wing device comprises a rotor wing motor and a propeller; and the unmanned aerial vehicle also comprises an auxiliary lifting mechanism which is connected and fixed on the fuselage, the auxiliary lifting mechanism can produce buoyancy force for floating upwards in air and is a bladder including gas inside, and the density of the gas inside the bladder is lower than the density of the air, and the buoyancy force of the auxiliary lifting mechanism is not more than the self gravity of the fuselage. The unmanned aerial vehicle provided by the invention has the advantages that the partial gravity of the fuselage is helped to be cancelled by virtue of the auxiliary lifting mechanism connected with the fuselage, so that the unmanned aerial vehicle is easier to take off and lift off and quickly enters a working condition, the energy consumption of a power mechanism is reduced, the cruising capability of the unmanned aerial vehicle is improved, the effective utilization rate of energy is increased, and energy conservation and environmental protection are realized.

The invention discloses a bilinear permanent magnet synchronous motor horizontally-feeding platform capable of offsetting the influence of gravity, comprising a movement-input linear drive module and a movement-output worktable movement module, wherein the linear drive module is a linear feeding module which is driven by two inclined flat type permanent magnet linear synchronous motors, and the linear movement shaft thereof is parallel to the linear movement shaft of the worktable movement module. The bilinear permanent magnet synchronous motor horizontally-feeding platform capable of offsetting the influence of gravity has reasonable structure, achieves zero component force offset of the two permanent magnet linear synchronous motors along the horizontal direction of a normal magnetic attraction force, with the component force along the vertical direction offsetting partial gravity of the worktable, reduces the friction force between a slide block and a linear guide rail, and leads the dynamic performance of a numerical control machine to be better.

The invention relates to a multifunctional master manipulator device with the low center of gravity. The multifunctional master manipulator device comprises a pedestal, a supporting rod, a connectingrod, a plurality of joint connecting rods, a plurality of transmission assemblies and a handle. The pedestal is in transmission connection with one end of the supporting rod, and the other end of thesupporting rod is in transmission connection with one end of the connecting rod. The multiple joint connecting rods are in transmission connection end to end to form a connecting arm. The connecting arm extends to the side deviating from the tilting direction of the connecting rod. The two ends of the connecting arm are in transmission connection with the other end of the connecting rod and the handle. The transmission assemblies comprise first drivers and steel wire wheel components. The first drivers are arranged on the connecting rod and get close to the supporting rod. The steel wire wheelcomponents are arranged on the joint connecting rods to be driven, and the first drivers drive the steel wire wheel components to drive the corresponding joint connecting rods to move. According to the multifunctional master manipulator device with the low center of gravity, the first drivers are arranged at the position, close to the supporting rod, of the connecting rod in a skewing mode, partof gravitational torque of the connecting arm can be compensated for, the center of gravity of the whole master manipulator device can get close to the pedestal, and thus the whole master manipulatordevice can be better stabilized.

The invention relates to a potential energy recovery system of lifting equipment and a use method under a non-stable load condition. A first oil outlet of a first electromagnetic directional valve is connected with a connecting oil port of a first accumulator unit and an oil inlet of a fourth electromagnetic directional valve, a second oil outlet of the first electromagnetic directional valve is connected with a connecting oil port of a second accumulator unit and an oil inlet of a fifth electromagnetic directional valve, the fifth electromagnetic directional valve is communicated with an oil outlet of a first hydraulic control one-way valve through a function valve assembly, and is connected with a rodless cavity oil port of a second potential energy recovery cylinder, and an oil return port of the fifth electromagnetic directional valve and an oil inlet of the first hydraulic control one-way valve are communicated with rod cavity oil ports of the first potential energy recovery cylinder and the second potential energy recovery cylinder, and are connected with a first oil return port of an oil tank. The method adopts the steps of determining the carrying load of the potential energy recovery system, and the specifications of the potential energy recovery cylinder and the accumulators; enabling the potential energy recovery cylinder to assist and push the load to move upwards; enabling a press sensor to detect the pressure of the accumulator and the carrying load of a lifting cylinder during the lifting of equipment. The system has the advantage that one part of wasted gravity potential energy can be recovered during falling.

The invention provides an air type position compensation device and belongs to the field of mechanical equipment. The device has five degrees of freedom and can perform high-precision adjustment on a driven object; the major gravity of the driven object (106) is born by a base (101) and a variable section piston (102) of the device; as the inner medium is air, influence, such as external vibration and the like, can be shielded. In the combined driving of an inbuilt motor of the device, as the major gravity of the driven object (106) is born by the air type position compensation device, the required driving power of a motor is smaller, the heating amount of the motor is low, and the heat stress of the driven object (106) is not influenced, so high speed and high precision position compensation requirement is met.

The invention belongs to the field of recreation tools, and particularly provides a multi-rotor manned craft adopting a helium balloon to overcome part of gravity. The multi-rotor manned craft comprises the helium balloon, a multi-rotor craft body, a manned cabin, a connecting device and a flexible buffer body. The helium balloon is arranged in the center of the multi-rotor craft body, the manned cabin is located under the helium balloon, and the flexible buffer body is pasted to the top end of the upper portion of the helium balloon. The helium balloon, the multi-rotor craft body and the manned cabin are connected together through the connecting device according to the positions. The helium balloon overcomes part of gravity for the multi-rotor craft body, and after people and cargos are carried by the manned craft, the speed of a motor of the craft does not need to be quite high, so that the purposes of maneuverability of the helium balloon and people and weight carrying of the multi-rotor manned craft are effectively achieved.

The invention relates to a microgravity effect ground simulation method based on magnetic-fluid mixed floating. The technical feature is that: based on the buoyancy of liquid, a mixed suspension mode of electromagnetic and liquid floating is used to provide means for accurately simulating space microgravity effects. Among them, most of the gravity of the object is overcome by the buoyancy of the liquid (coarse trim), and the remaining very small part of the gravity is overcome by fine-tuning the electromagnetic force (fine trim), so as to achieve the purpose of precise trim. At the same time, the adjustment of the levitation height of the object under the microgravity effect simulation environment controls the magnitude and direction of the electromagnetic force by controlling the current intensity or other electromagnetic field parameters, so as to realize the arbitrary change of the levitation height and position of the object under the weightlessness effect.

The invention discloses a spatial two-moment distribution hoisting method of an overweight body with a partial gravity centre. The method comprises the following steps of simulating and calculating a hoisting system by using a computer; determining a working area of cranes; starting the crane A and the crane B; hoisting the overweight body with the partial gravity centre to a certain height above ground; turning around the big arms of the crane A and the crane B to hoist the overweight body out of a pit; adding two flexible straps to be respectively bound at the head part and the tail part of the overweight body with the partial gravity centre, and starting the crane C and the crane D simultaneously; rotating the straps of the crane A and the crane B to a predetermined angle, hoisting the overweight body by the crane A and the crane B at the same time, and rotating the two moments; placing the overweight body on a transport vehicle after side sideways turning the overweight body; and reversely repeating step 3 to step 7 after transporting the overweight body to a destination. By the method disclosed by the invention, the problems that hoisting and falling are unstable when a traditional stand-alone large tonnage crane hoists the overweight body with the partial gravity centre, the overweight body cannot be transported smoothly when being vertically placed on the transport vehicle and the appearance of the overweight body is damaged when the overweight body is bound by using a steel wire rope are solved.

The invention provides a multifunctional treadmill. The multifunctional treadmill comprises a running table, a sealed gasbag, a tight-expanding part and pressure adjusting equipment, wherein the running table simulates a user running site through circulating rotation, the sealed gasbag wraps the running table, and an opening which is used for allowing the leg of the human body to extend into the sealed gasbag is formed in the portion, above the running table, of the sealed gasbag, the tight-expanding part is arranged at the opening of the tight-expanding part, and makes the opening sealed by squeezing the part which is in contact with the human body; at least partial structure of the pressure adjusting equipment is located in the sealed gasbag, and by compressing the air density in the sealed gasbag, the atmospheric pressure in the sealed gasbag is larger than environment atmospheric pressure. The sealed gasbag and internal pressure share partial gravity of the human body, when a user runs, the pressure in the leg of the human body is reduced, when the user runs and exercises for a long time, leg muscle proliferation cannot be caused, and the multifunctional treadmill can be loved and recognized by the user.

The invention discloses an electrochemical machining apparatus of a dispersed suspended cathode. The electrochemical machining apparatus of the dispersed suspended cathode comprises a cathode which is opposite to an anode workpiece and used for realizing electrochemical machining, wherein the cathode is arranged on a support unit in a floating connection manner and suspended upon an anode. The suspension manner is as follows: partial gravity of the cathode is supported by static pressure and dynamic pressure of electrolyte between the cathode and the anode, the other part of the gravity is supported by the support unit. Besides, a two-channel cathode machining lug boss is arranged at the lower part of the cathode in a dispersing manner. According to the suspended cathode provided by the invention, the transmission of the positioning error of the workpiece to the machining error of the workpiece is blocked by the suspended cathode provided by the invention, the distribution range of the electrochemical action on the surface of the workpiece is amplified by the discretization of the cathode, and meanwhile, a pulse current is supplemented to reduce machining gaps and enhance the duplication from the precision of the cathode to the precision of the workpiece, so that the machining precision is greatly improved.

A cap for a microtube, which can be automatically aligned by an alignment plate for insertion in a correct orientation into the open end of the microtube held in a micro tube rack. The plate has partitions in a grid which produces a matrix of cells having a pitch defined by the spacing between the partitions. The cap 100 has an plug portion 120, which is adapted to be inserted into the open end of the microtube which is held in a rack having a matrix of wells congruent with the matrix of cells in the alignment plate. A grip portion 110 of the cap has an outer circumferential diameter larger than an outer circumferential diameter of the plug portion 120, so that when the cap is inserted in the microtube, the grip portion protrudes from the open end of the microtube. The entire length of the cap 100 is longer than the pitch of the alignment plate and shorter than twice the pitch. An upper edge of the grip portion 110 of the cap 100 has a collar 130 with an outer circumferential diameter larger than the pitch of the alignment plate. The plug portion 120 of the cap 100 has a taper 122 which is tapered toward a front end, and the center of gravity of the cap 100 is in the plug portion, so that the plug portion of the cap gravitates into one of the open cells of the alignment plate.

A catalyst substrate support is provided which has a corrugated foil honeycomb matrix having an axis and defining a plurality of passages therethrough which are generally parallel to the axis and extend between opposite end faces of the matrix. A peripheral mantle extends about an outer perimeter of the matrix. The peripheral mantle has inwardly extending flanges which extend across an outer periphery of the opposite end faces to cover outermost of the passages and restrict fluid flow between the peripheral mantle and the matrix. The outer perimeter of the matrix and the peripheral mantle may be spaced apart to define a gap for accommodating differential thermal expansions of the matrix and the peripheral mantle, the gap being smaller than a height of the inwardly extending flanges. The catalyst substrate support may have at least one cross member extending across and secured to each of the opposite end faces of the matrix. The matrix may have recesses extending into the opposite end faces for receiving the cross members. The cross members support the matrix in the peripheral mantle to transfer at least part of the gravitational load of the matrix to the mantle. The cross members may be slidingly received by the recesses in the matrix to avoid transfer of thermally induced stresses between the matrix and the peripheral mantle.

The invention relates to a three-section double-motor stirring device applied to white carbon black production. A first stirring shaft and a second stirring shaft are each provided with three sections of stirring rods, the lengths of the three sections of the stirring rods arranged on the first stirring shaft are reduced in sequence from top to bottom, the lengths of the three sections of the stirring rods arranged on the second stirring shaft are increased in sequence from top to bottom, and multiple smooth arc-shaped protruding blocks are longitudinally arranged on the inner side wall of a tank. The three-section double-motor stirring device has the advantages that on the condition that double motors reach the same stirring speed, shaking of the tank can be greatly reduced; meanwhile, when one motor is used, increase of a load on the motor can be reduced, the service life of the motor is prolonged, by means of the second motor, when slurry is stirred, deposition of the partial slurry can be prevented, when stirring blades of the second stirring shaft rotate, the slurry can be made to overcome part of the gravity to be mixed with the slurry on the upper portion by means of centrifugal force, the speed is increased, and deposition is prevented.

The invention relates to a novel blowout-prevention and anchoring integrated tool. The tool comprises an anti-rotation part, a releasing part, a pressure relief channel part, an anchoring part, a gravity valve part and a through rod, wherein the anchoring part comprises a supporting slip; an upper joint of an anti-rotation anchor is connected with the lower end of a screw pump; a lower joint of the anti-rotation anchor is connected with a sieve pipe; the lower end of the sieve pipe is connected with a connecting joint of a releasing packer; the lower end of a connecting rod is connected with the through rod; an upper joint of a pressure relief channel is connected with a lower joint of the releasing packer; an upper joint of the supporting slip is connected with a lower joint of the pressure relief channel; an upper joint of a gravity valve is connected with a central pipe of the supporting slip; and a lower joint of the gravity valve is connected with an oil pipe through threads. According to the novel blowout-prevention and anchoring integrated tool, the anti-rotation effect is more ideal, the failure caused by insufficient engagement force after the long-term use of the releasing packer is prevented, the danger of upward channeling of a tubular column during operation can be avoided through the pressure relief channel part, and the failure of a float switch caused by sand sinking accumulation of a fractured well can be avoided.

The invention discloses an auxiliary closing device for a bottom door. The device comprises an elastic part which is installed between an underframe (1) of a truck and the bottom door (2), wherein the elastic part has a restoring force for the bottom door (2) along the closing direction of the bottom door (2). When the bottom door (2) is closed by pushing of an operator, as the elastic part has the restoring force on the bottom door (2) along the closing direction of the bottom door, the resultant force of the restoring force and the applied force on the bottom door (2) by the operator is equal to the gravity of the bottom door (2), the restoring force of the elastic part counteracts a part of gravity of the bottom door (2); therefore, when the bottom door (2) with the same weight is closed, the applied force by the operator can be obviously reduced, the labor intensity of the operator during the closing process is reduced, and the potential safety hazard is also reduced.

The invention relates to a hybrid levitation method of distributed electromagnetic and liquid flotation. The technical feature is that: the hybrid levitation method of distributed electromagnetic and liquid flotation is adopted to overcome the gravity of the object and provide the driving force for horizontal movement at the same time, so as to realize the stability at a meter-level height At the same time, the suspension can realize the movement in the horizontal direction in the suspended state. Among them, most of the gravity of the object is overcome by the buoyancy of the liquid (coarse trimming), and the electromagnetic suction is used as an auxiliary force for suspension to overcome the remaining small part of the gravity. By adjusting the current to change the strength of the electromagnetic field, the electromagnetic force is adjusted to achieve suspension. The adjustment of the suspended height of the object is realized by controlling the current intensity of the distributed coil through position feedback, and mainly controlling the electromagnetic force of the central coil. The control of the horizontal position of the object is realized by changing the voltage and current of several coil groups around the distributed array.

The invention provides a fatigue test loading device of transportation on a bridge, which belongs to the test equipment field. The structure comprises a mainframe, two loading tracks which are parallel with each other are horizontally arranged over the mainframe, at least two pairs of loading wheels are arranged at the bottom of the two parallel loading tracks, each pair of loading wheel is connected through a loading shaft, the loading shafts are arranged on a upper support rack, the upper support rack is connected with a lower support rack through a double acting oil cylinder, a rolling module is arranged on the lower support rack; the upper support rack is connected with a traction driving module; the double acting oil cylinder is connected with a hydraulic system. According to the invention, the employed loading tracks, no-load track and the loading wheels between the two are capable of realizing the transportation of loading and no-load, reducing the apparatus height and partial gravity of transportation and decreasing the inertia mass, so that the transportation stability is good. The rolling module of the invention can comprise a rolling steel wheel, and also can comprise two rolling wheel groups, so that the change of rolling mode can be realized, and the accuracy of the test conclusion and test efficiency can be enhanced.

The present invention discloses a hierarchy gravity model based imbalanced data classification method and a system therefor. The method comprises the following steps: S1, acquiring a to-be-classified sample set Z, wherein each sample in the to-be-classified sample set Z comprises D attributes, and D is a positive integer; S2, performing interval division on attribute values of samples, dividing each attribute into L intervals, dividing the samples into LD D-dimensional cubes, and calculating an attribute weight, wherein L is a positive integer; and S3, dividing feature space, placing the to-be-classified sample set Z into a corresponding hierarchy D-dimensional cube, and performing label classification on the samples in conjunction with a gravity model. The hierarchy gravity model based imbalanced data classification method and the system therefor have the following advantages: the attributes are weighted at different resolutions for a multi-hierarchy model, and classification performance of a hierarchy model is improved; classification efficiency is improved by dividing the attributes at different resolutions and establishing a hierarchy classification model; and classification precision of data in a space overlapping area is optimized by using a partial gravity model.

The invention relates to a mechanical arm lifting column, in particular to a low-power lifting stand column. The low-power lifting stand column comprises a first-stage fixed stand column body, a second-stage lifting stand column body, a third-stage lifting stand column body, balance weights, a motor, a transmission synchronous belt, a ball screw, a lifting synchronous belt and a balance weight synchronous belt. The second-stage lifting stand column body is connected with the first-stage fixed stand column body through a linear guide rail. The third-stage lifting stand column body is connected with the second-stage lifting stand column body through a linear guide rail. The balance weights are connected with the first-stage fixed stand column body through a linear guide rail. The motor is connected with the second-stage lifting stand column body through the transmission synchronous belt and the ball screw and drives the second-stage lifting stand column body to achieve movement in the vertical direction. A nut of the ball screw is fixed to the second-stage lifting stand column body. Due to the fact that the balance weights are additionally arranged, power needed for the lifting stand column can be balanced through the balance weights, the motor power only needs to balance friction resistance and partial gravity in the movement process, the power of the lifting motor is reduced, and the aims of saving energy and reducing the overall size are achieved.

The invention relates to a self-force source driven interactive paraplegia walker exoskeleton. The self-force source driven interactive paraplegia walker exoskeleton comprises a self-force driven RGO and a self-force source driven rollator, wherein the self-force driven RGO comprises foot supports, lower lattice girders, knee joints, upper lattice girders and hip-joint components which are sequentially connected; the self-force source driven rollator comprises a front frame, back frames, a middle beam connecting a left frame with a right frame into a whole, and a self-force source driving mechanism fixedly connected above the front frame; wheels are mounted on the front frame; anti-slip seats are mounted in the grounding positions of the back frames; the self-force source driving mechanism is connected with the hip-joint components of the self-force source driven RGO through a dynamic pull rod sleeve; a dynamic pull rod is arranged inside the dynamic pull rod sleeve. The self-force source driven interactive paraplegia walker exoskeleton has the following benefits: through converting the partial gravity produced by shifting the center of gravity into the driving force of an interactive mechanism through an arm of the patient, energy produced by shifting the center of gravity of the patient is fully utilized; energy consumption of the paraplegic patient is reduced when the paraplegic patient utilizes the RGO to perform interactive walking.

Method for handling material in a pneumatic pipe transport system, in which material, such as waste material, is input from an input aperture of an input point (3), such as from the input aperture of a refuse chute or of some other input point, and is conducted along a feeder channel (2) with a shaper device (1) arranged in connection with the input point or in the proximity of it, in which case the material to be handled is conducted into the shaper device and / or through it by the aid of at least partly gravity and / or the suction and / or a pressure difference of the pneumatic pipe transport system. In the method the material is handled with one handling means (10) in a shaper device (1), which handling means is rotated around an axis of rotation when handling material and which handling means comprises an aperture (20), which is arranged eccentrically with respect to the axis of rotation of the handling means, that the rotatable handling means (10) arranges the material to be infed into the proximity of the output aperture and, if necessary, shapes the material, together with at least an edge (18) of the output aperture of the rotary shaper and / or the wall of the output channel (4), when the handling means (10) is rotated with a drive device (7).

Disclosed is a method and system for utilizing a spherical cap harmonic model to determine disturbing gravity along an orbit. Before an aircraft is launched, with a first launching area as a sphericalcap area to be approached, the radius of a spherical cap is determined, and a spherical cap coordinate system is established; under the condition that an origin of coordinates is unchanged, the radius of the spherical cap is mapped to a hemisphere, and a new coordinate system is established; under the new coordinate system, a non-integral numerical value of a spherical cap harmonic expression iscalculated; on the basis of the non-integral numerical value, the spherical cap harmonic model is utilized to calculate the disturbing gravity under the new coordinate system; the disturbing gravity is converted into the original coordinate system, and the disturbing gravity of the aircraft along the orbit is obtained. By means of the method and system, the practical application effects of the spherical cap harmonic analysis model in studies of partial gravity fields are improved, under the condition of meeting the same accuracy, the speed of assigning the disturbing gravity of the spacecraftalong the orbit is increased, fewer memories are required, and mobile and quick launching is facilitated.

The invention discloses a vortex type floating ball check valve. The check valve includes a check valve body, the check valve body is provided with a connecting member, the connecting member is rotationally connected with a rotating member, the rotating member includes a horn-shaped rotating body, and the inner wall of the horn-shaped rotating body is provided with blades distributed in an array.According to the check valve, rainwater falls into the horn-shaped rotating body and impacts the blades, at the time, part of gravity potential energy and kinetic energy of the rainwater is convertedinto kinetic energy of the rotating member, so that the rotating member rotates on the connecting member, and the rainwater rotates together with the rotating member; under the action of gravity, therainwater passes through the connecting member to flow out through the check valve body, in the flowing-out process, the rainwater obtains power potential energy in the rotating member, and the rainwater has the rotating speed to flow out, so that the drainage efficiency is improved, and accumulation of excessive rainwater is avoided; and when the precipitation amount is equivalent to the drainagetime, the diameter of a drainage pipe required by the vortex type floating ball check valve is small, and the drainage cost is reduced.

The invention provides a celestial body running simulation device and a method thereof. The celestial body running simulation device comprises a barrel-shaped body, an elastic film, an air blower, andat least two spheres. The elastic film covers the upper opening edge of the barrel-shaped body. The spheres are placed on the elastic film to simulate celestial bodies or dark matters. Air holes aredensely distributed in the elastic film. The air blower is communicated with the inner space of the barrel-shaped body through an air inlet pipe, and is used for blowing air into the barrel-shaped body to form positive pressure. Gas in the barrel-shaped body is discharged from the air holes to carry partial gravity of the spheres. According to the invention, the device has a simple structure, andcan be used for simulating celestial body running laws such as celestial body revolution, universal gravitation, dark matters, dark energy, cosmic expansion and gravitational waves, clearly displays obscure astronomical knowledge to students, well popularizes astronomical knowledge, and is convenient for general public to understand.

The invention provides a freezer and an operating method for doors of the freezer. The freezer comprises a freezer body and sliding doors, wherein a freezer opening is formed in the freezer body, sliding grooves are formed in the freezer opening, the sliding doors are connected in the sliding grooves in a sliding manner, the freezer opening is provided with first electromagnets, and the edges of the sliding doors are provided with second electromagnets matched with the first electromagnets. By separately arranging the first electromagnets and the second electromagnets on the freezer opening and the sliding doors, magnetic force is produced between the first electromagnets and the second electromagnets, the direction of the magnetic force produced in the process that the sliding doors are opened and closed is opposite to that of the gravity of the sliding doors, part of the gravity of the sliding doors is counteracted by the produced magnetic force, and pressure produced on the freezer opening by the sliding doors is reduced, so that friction force between the sliding doors and the freezer opening is effectively reduced, the sliding doors can be more easily opened and closed by a user, the opening and closing of the sliding doors of the freezer by the user are facilitated, the use convenience of the freezer is improved, and the service life is prolonged.

The invention relates to a suspension luggage. A screw propeller is mounted on the luggage, in the pulling process of the luggage, when obstacles, steps or valleys are encountered, the luggage can beassisted to rise for a distance to overcome obstacles, and the manpower is saved. Through the technical scheme, thrust is generated through the screw propeller, a part of gravity is shared, the luggage is assisted to rise to the sky. The suspension luggage has the beneficial effects that the suspension luggage is simple in structure, convenient to carry and labor-saving, and can be mounted on draw-bar boxes, draw-bar bags, packsacks and small handcarts; due to the fact that the screw propeller is mounted on the luggage, in the pulling process of the luggage, when obstacles, steps or valleys are encountered, the luggage can be assisted to rise for a distance to overcome obstacles, and the manpower is saved.