173results about How to "Few joints" patented technology

The invention discloses a separated super-magnetostrictive telescopic rotary ultrasonic vibration head which comprises a cutter handle, a variable amplitude rod, a cutter, a permanent magnet body, a super-magnetostrictive telescopic rod, a first magnetic conduction piece and a second magnetic conduction piece, a coil and a coil support; the super-magnetostrictive telescopic rod is sleeved on the permanent magnetic body and coaxial with the permanent magnetic body; a filling gap is formed between the super-magnetostrictive telescopic rod and the permanent magnetic body; the coil is sleeved on the super-magnetostrictive telescopic rod; ultrasonic alternating current is fed into the coil to generate an alternating magnetic field so as to drive the super-magnetostrictive telescopic rod to generate ultrasonic longitudinal vibration; and the coil support is arranged on the periphery of the coil for installing the coil. According to the ultrasonic vibration head provided by the embodiment of the invention, the coil and the cutter handle are separated, so that the energy transmission efficiency is improved while the non-contact transmission of ultrasonic energy is realized, and the output power and the output amplitude are increased under the same conditions.

A storage tank defines a cryogen space for storing a cryogenic liquid. The storage tank comprises a combined fill and vent assembly, which comprises a conduit having a first end with an opening disposed within an upper part of the cryogen space, and a second end outside of the cryogen space that is connected to a receptacle, to which a re-filling nozzle can be attached. A check valve disposed in the conduit allows flow only in the direction of filling the cryogen space with cryogenic liquid from the receptacle. A by-pass line is provided around the check valve with a valve disposed in the by-pass line that is operable to open or close to control flow through the by-pass line. The method comprises attaching a re-filling nozzle to the receptacle and opening the by-pass valve to vent vapor from the cryogen space to reduce vapor pressure therein and to cool the conduit, receptacle, re-filling nozzle, and fill line. After venting the storage tank, the by-pass valve is closed, and the storage tank can be re-filled through the receptacle and conduit.

The invention provides a technique and an apparatus for producing a reinforced thermoplastic pipe. The technique comprises the following steps: 1) sending granular PE to a hopper of an extruding machine by negative pressure; 2) heating PE plastic by a first extruding machine, and continuously extruding the PE plastic by a die head with high pressure; 3) cooling the molten PE by water into a PE internal pipe under negative pressure through a vacuum calibrating sleeve of a vacuum water tank; 4) cooling and forming the PE internal pipe continuously in a spray water tank; 5) drying the surface of the PE internal pipe taken from the spray water tank by a first air cooler; 6) pulling the PE internal pipe continuously and stably by a hauling machine which provides power for forming the PE internal pipe; 7) winding a plastic covered reinforcing band made of steel wire or fiber yarn twisted ropes by a winding machine with constant tensile force in opposite directions respectively on the PE internal pipe or the outermost layer of the PE internal pipe; 8) wrapping the molten PE plastic on the outside of the wound reinforcing band through an external composite die head by a second extruding machine to form a wrapped RTP pipe; 9) spraying and cooling to form the wrapped RTP pipe in the water tank; and 10) drying the surface of the RTP pipe taken from the water tank by a second air cooler. The technique is simple and feasible. The apparatus has simple structure, good operating performance and stable and reliable operation.

The invention discloses a spatial parallel robotic mechanism with three degrees of freedom (DOF). The mechanism consists of a motion platform, a fixed platform and three branched chains for linking the two platforms; two of the three branched chains have the same structure and respectively comprise a hooke joint, two rotating joints and connecting rods from top to bottom, wherein the connecting rods are arranged among the hooke joint and the two rotating joints; and the other branched chain comprises a ball joint, two rotating joints and connecting rods from top to bottom, wherein the connecting rods are arranged among the ball joint and the two rotating joints. A working platform of the mechanism can realize motion output with one translational DOF and two rotations; and the mechanism has less joints and a motion pair only has 13 DOFs in total, thereby effectively solving the problem that a parallel mechanism is easy to bend, reverse and deform due to overabundance of DOFs of the motion pair. In addition, a rotating head with two DOFs is connected in series to the motion platform, and therefore, a hybrid robot with five DOFs, which can be used in occasions of machining at high speed, can be designed.

The invention discloses a three-degree-of-freedom spatial parallel robot mechanism, which consists of a motion platform, a fixed platform and three branched chains connected with the two platforms, wherein two branched chains have the same structure and consist of two rotating pairs, a movable pair and a connecting rod therebetween from top to bottom respectively; and the other branched chain consists of two rotating pairs, two movable pairs and a connecting rod therebetween from top to bottom. The motion platform of the mechanism can realize three movable motion outputs. The mechanism has a few joints and 10 degrees of freedom of the motion pairs in total only, so that the mechanism can effectively improve the problem that the parallel mechanism is easy to bend, twist and deform due to excessive degrees of freedoms of the motion pairs. In addition, a two-degree-of-freedom rotating head is serially connected with the motion platform, so a five-degree-of-freedom mixed robot can be designed, and the mechanism can be used for high-speed machining machine tools, laser impact forming equipment and other occasions.

The invention discloses a fully decoupled three-degree-of-freedom parallel robot mechanism, which consists of a motion platform, a fixed platform and three fork chains connecting the two platforms, wherein two of the three fork chains have the same structure and each of the two fork chains consists of a hooke hinge, a rotary hinge, a moveable hinge and a connecting rod between the two fork chains from top to down; and the other fork chain consists of a spherical hinge, a rotary hinge, a moveable hinge and a connecting rod between the fork chains from top to down. The working platform of the mechanism of the invention can realize a one-translation two-rotation fully decoupled motion output; and the mechanism can effectively solve the problems of easy flexure and torsional deformation of the parallel mechanism caused by excessive freedom degrees of a motion pair and increase the whole load / weight ratio of the mechanism because the mechanism has few joints and only 13 freedom degrees of motion pair in total. In addition, a five-degree-of-freedom hybrid robot can be designed by connecting a two-degree-of-freedom rotary head with the motion platform in series and can be applied to complex curved surface machining and on other occasions.

The invention discloses a spatial parallel robotic mechanism with three degrees of freedom (DOF). The mechanism consists of a motion platform, a fixed platform and three branched chains for linking the two platforms; two of the three branched chains have the same structure and respectively comprise a hooke joint, a rotating joint, a prismatic joint and connecting rods from top to bottom, wherein the connecting rods are arranged among the hooke joint, the rotating joint and the prismatic joint; and the other branched chain comprises a ball joint, a rotating joint, a prismatic joint and connecting rods from top to bottom, wherein the connecting rods are arranged among the ball joint, the rotating joint and the prismatic joint. A working platform of the mechanism can realize motion output with one translational DOF and two rotations; and the mechanism has less joints and a motion pair only has 13 DOFs in total, thereby effectively solving the problem that a parallel mechanism is easy to bend, reverse and deform due to overabundance of DOFs of the motion pair. In addition, a rotating head with two DOFs is connected in series to the motion platform, and therefore, a hybrid robot with five DOFs, which can be used in occasions of machining at high speed, can be designed.

The invention discloses a two-rotation one-movement parallel mechanism capable of realizing motion decoupling, and relates to the technical field of robots and spatial mechanisms. The parallel mechanism comprises a fixed platform, a movable platform and three branch chains for connecting the two platforms, wherein the two branch chains are respectively formed from the fixed platform to the movable platform through a rotating pair R, a moving pair P, a hooke joint T and a connecting rod therein; and the other one branch chain is formed from the fixed platform to the movable platform through a spherical pair S, a moving pair P, a rotating pair R and a connecting rod therein. According to the invention, the two-dimensional rotation and the one-dimensional movement are realized by the working platforms, and the output of a decoupling motion is realized by the three motion freedoms. In addition, the position and the posture of the movable platform can be adjusted by controlling the displacement of the moving pair P in each chain. The parallel mechanism provided by the invention has advantages of simple and novel structure, simplicity in forward / inverse motion, large working space and convenience in controlling method. Therefore, the parallel mechanism has a wide application foreground in various fields such as robot technology, machining, positioning devices and sensors.

The invention belongs to a safety rope weaving machine, which mainly consists of a motor, a conveyor belt, a bottom frame, a disc wheel transmission gear set, a traction leading-out wheel and an upper table top. The safety rope weaving machine also comprises a rope traction leading-out device positioned at the upper end of the upper table top, a warp-weft weaving and rope twisting mechanism positioned between the upper and middle table tops, and a leasing rod up-and-down movement mechanism positioned between the middle and lower table tops. The safety rope weaving machine can weave a warp and weft crossed rope, wrap a layer of warp and weft crossed rope sleeve outside the rope core and weave a safety rope with the rope sleeve tightly combined with the rope core; and the safety rope weaving machine has the advantages of simple structure, few joints, high weaving speed, high yield, low noise, low processing cost and good processing quality.

The invention discloses a flexible composite high-pressure delivery pipe. The flexible composite high-pressure delivery pipe comprises a media transmission layer, at least one enhanced layer and a protective layer which are integrally formed by means of heating and pressurization, the enhanced layers are arranged between the media transmission layer and the protective layer and are arranged as fiber enhanced layers, metal enhanced layers or a combination of the fiber enhanced layers and the metal enhanced layers, the fiber enhanced layers and the metal enhanced layers are of banded structures formed by gel mould coated with hot melt glue, an angle of 50-60 degrees is formed between each of the fiber enhanced layers and the metal enhanced layers and a central axis of the pipe, and the enhanced layers are of a bidirectional fiber band and metal band intersection winding structure comprising a left spiral winding layer and a right spiral winding layer. The flexible composite high-pressure delivery pipe has the advantages of reasonable structural design, high pressure bearing capacity, high resistance to low-temperature impact, small friction coefficient, good flexibility, environmental protection and long service life.

The invention discloses a three degree-of-freedom parallel mechanism with symmetrical space surfaces, and relates to the technical field of robots and space mechanisms. The mechanism is composed of a fixed platform, a moving platform and three support chains which are used for connecting the fixed platform and the moving platform. Two of the three support chains from the fixed platform to the moving platform are respectively composed of a cylindrical pair C, a prismatic pair P, a spherical pair S and connecting bars among the cylindrical pair C, the prismatic pair P and the spherical pair S. The other support chain from the fixed platform to the moving platform is composed of a cylindrical pair C, a prismatic pair P and a connecting bar between the cylindrical pair C and the prismatic pair P, and namely the parallel mechanism is a moving chain type parallel mechanism. According to a worktable of the parallel mechanism, three degree-of-freedom move output which contains a one-dimensional move and a bi-dimensional rotation can be achieved, and adjustment of positions and postures of the moving platform can be achieved through control on displacement of the prismatic pairs P in the support chains. The parallel mechanism is simple and novel in structure, concise in moving forward solution, and simple and convenient in control method. The parallel mechanism has a wide potential application prospect in multiple fields such as robot technology, machining and locating devices.

The invention discloses a flexible pipeline for undersea oil transportation and gas transportation, which comprises a cable and a flexible pipe for oil transportation and gas transportation. An anchor pile assembly for being connected with the seabed and a binding assembly for binding the flexible pipe are arranged on the cable in sequence. The anchor pile assembly comprises a first fixture and apipe pile hinged together, the first fixture is connected with the cable, and the pipe pile is inserted and fixed on the seabed. The binding assembly comprises a binding belt and a second fixture arranged on both ends of the binding belt, the end parts of the second fixture are provided with locating slots, and the cable is clamped and fixed in the locating slots. The flexible pipe is sheathed inthe binding belt of which the head and the tail are connected on the cable. The flexible pipeline provided by the invention is safe, reliable and convenient and easy to construct and has the advantages of high construction speed and low cost.

The invention discloses a cooling device for a power lithium battery. The cooling device comprises a second branch consisting of a cooling plate and a second expansion valve at the front end of the cooling plate. The cooling device is characterized in that the second branch is connected in parallel with a first branch consisting of an evaporator of an automobile refrigerating system and a first expansion valve at the front end of the evaporator, wherein the cooling plate is attached to the battery. According to the cooling device for the power lithium battery, a liquid refrigerant from a condenser is divided into two paths; after being throttled and depressurized by the first expansion valve, the first path of liquid refrigerant enters the evaporator, is gasified to absorb heat in the evaporator, and exchanges heat with outside air, so as to achieve a refrigeration effect; after being throttled and depressurized by the second expansion valve, the second path of liquid refrigerant is directly charged into the cooling plate, after being attached to the cooling plate, the battery is in tight contact with the cooling plate, heat generated during operation of the battery is transferred to the cooling plate, the refrigerant is evaporated to absorb heat in the cooling plate, and the generated heat during operation of the battery is taken away, so that the temperature of the battery is reduced.

The invention discloses a reinforced thermoplastic plastic pipe which is relatively light in weight and is largely increased by pressure resistant performance, which comprises an inner layer pipe and an outer layer pipe. The reinforced thermoplastic plastic pipe is characterized in that a reinforced layer is further arranged between the inner layer pipe and the outer layer pipe, and the reinforced layer is wound by at least two layers of basalt fibers which are treated by plasma. The weight of the reinforced thermoplastic plastic pipe is only the one-quarter of a steel pipe, pressure resistant performance is greatly increased, the pipe can bear 800 Pa pressures, and is long in service life and strong in erosion resistance, besides, the plastic pipe can be processed into a pony roll in hundreds of meters, and is more convenient in paving and less in connector. The plastic pipe can be widely applied to conveying crude oil, acid natural gas and the like.

The invention relates to a space 5 freedom degree parallel robot mechanism and belongs to the technical field of robots and space mechanisms. The mechanism comprises a lower platform, an upper platform, five branch chains for connecting the upper platform with the lower platform and an end effector which is installed on the upper platform, wherein one of branch chains consists of a cross universal pair, a motor base, a drive motor, a moving pair and a cross universal pair, the cross universal pair, the motor base, the drive motor, the moving pair and the cross universal pair are arranged from bottom to top, structures of the other four branch chains are the same, each of the other four branch chains consists of a cross universal pair, a motor base, a drive motor, a motor fixing plate, a moving pair and a cross universal pair, and the cross universal pair, the motor base, the drive motor, the motor fixing plate, the moving pair and the cross universal pair are arranged from bottom to top. By the aid of the upper platform of the mechanism, the motion input of the three-dimension translation and the two-dimension translation of a Cartesian coordinate system can be achieved, and the mechanism has the advantages of being good in rigidity and high in accuracy.

The invention discloses a power lithium battery cooling plate. The power battery cooling plate comprises a forming plate and a flat plate, the forming plate is internally provided with a plurality ofrunners, the power battery cooling plate is characterized in that each runner comprises a freezing medium entrance section, a plurality of flows and a freezing medium exit section which are sequentially connected in series, a heat exchange area is formed in the flow, and the heat exchange areas of the various runners are arranged in parallel. A freezing medium of an automobile refrigerating systemis used as a refrigerant to cool a lithium battery. The freezing medium enters the cooling plate from the entrance section of the runner, exchanges heat with the battery in the runner, and flows outfrom the exit section after absorbing the heat. As the multiple runners are adopted, the flow distribution of the freezing medium on the cooling plate is reasonable, and the effect of evenly cooling the battery is produced. Each runner is provided with a plurality of flows, the cold and hot flows are distributed in a staggered manner, so that the heat exchange is more sufficient, and the heat exchange efficiency is improved.

A size adjustable soccer goal. A frame has corners and includes tubular members replaceably attached to each other allowing the frame to be size adjustable and knockdownable. A net operatively and replaceably attaches to the frame allowing the net to be size adjustable to accommodate a size of the frame and be removable from the frame. The corners of the frame are one-piece with associated members of the frame, respectively, eliminating small separate additional corner pieces from getting lost, requiring additional assembly, and compromising structural integrity of the frame.

The invention discloses a method for improving survival rate of transplanted big trees by a soft pervious pipe, which comprises the following steps: before a big tree is planted, foundation of a ready plant hole is dug much deeper; a soft pervious pipe is placed on the bottom of the plant hole; graded broken stone is spread on the side and the top of the soft pervious pipe, and river sand is placed outside the broken stones; planting soil with fertility is placed on the river sand, and the big tree is transplanted on the plant soil according to the standards and requirements for transplanting big trees. An outlet of the soft pervious pipe is networked with an urban rainwater drainage system or is communicated with a river or a low-lying land the highest water level of which in flood season is below the outlet of a drain pipe. The method can quickly and smoothly discharge excess water into the pervious pipe and out of the plant soil, which causes the plant hole and soil around the hole can obtain the field water holding capacity required by the tree in a very short time, thus greatly improving the survival rate of the transplanted tree and the growth potential thereof.

A solar assembly is provided for harnessing solar rays and generating electricity. The solar assembly includes at least one vertical leg extending in a vertical direction and having an upper attachment end. The assembly also includes at least one north-south rail and a plurality of east-west rails extending generally transversely to the north-south rail. A curved member interconnects the vertical leg with the north-south rail and extends through an arcuate shape. The solar assembly also includes a plurality of generally flat arrays of solar panels, such as photovoltaic panels, are coupled to the east-west members. The orientation of the solar panels relative to a base or the ground is dependent on the location along the curved member of the connection with the vertical leg.

The invention discloses a three-support space mechanism with two same supports. The three-support space mechanism comprises a motion platform, a fixed platform and three support chains connecting the two platforms. The first support chain and the second support chain are identical in structure. Each of the first support chain and the second support chain comprises a universal joint pair, a rotation pair, a cylinder pair and connecting rods among the three pairs from the top to bottom. The third support chain comprises a universal pair, a rotation pair, a cylinder pair and connecting rods among the three pairs. The motion platform mechanism of a parallel robot mechanism is simple, kinematic model simpleness is achieved, kinematics calibration and related control are facilitated, and few mechanism joints and easiness in manufacturing are achieved at the same time.

A modular electromagnetic device (7) has a stator (16, 20a, 20b, 18, 22a, 22b) and a rotor (12) rotating between facing surfaces of the stator (16, 20a, 20b, 18, 22a, 22b) and bearing a plurality of magnets (14) distributed with alternate orientations in a substantially ring-shaped pattern, and the stator (16, 20a, 20b, 18, 22a, 22b) comprises at least one pair of magnetic yokes (16, 18) symmetrically located at both sides of the rotor. Each yoke (16, 18) has a pair of projecting arms extending towards the magnets (14) and bearing a respective coil (20a, 20b, 22a, 22b) for collection of electric power from or supply of electric power to the device (10). Each yoke (16, 18) is individually mounted on an own support equipped with adjusting units arranged to adjust the yoke position relative to the confronting magnets (14), and forms, together with its coils (20a, 20b, 22a, 22b; 20', 22'), its support, the adjusting units thereof, and sensing and control means controlling the yoke adjustment, an elementary stator cell that can be replicated to form single-phase or multiphase modules.

A tri valve backflow preventer having parts and materials preferably consisting of steel nuts and bolts, ductile iron operating nuts, nitrile rubber O-rings, nitrile rubber gaskets, manganese bronze valve adjusting stems, valve wedge gates made of ductile iron encapsulated with EPDM rubber, and ductile iron valve bodies. Material and parts are constructed in accordance with ASTM standards and the requirements of the AWWAC-509 and AWWAC-504 for gate valves and butterfly valves. The tri valve backflow preventer is used with a temporary conventional backflow assembly between existing water main pipe and new / upgraded sections of water main pipe while they are under construction. It is left in place when the temporary backflow assembly is removed. Its use saves extra inspection hours, extra man hours, extra equipment hours, conserves large amounts of good water otherwise needed for flushing, and reduces the safety risk to the public during activation of new water lines.

The invention relates to a 2PR and PRS spatial parallel robot mechanism. The 2PR and PRS spatial parallel robot mechanism comprises a moving platform, a fixed platform and three branch chains for connecting the two platforms; the first branch chain and the second branch chain in the three branch chains are the same in structure, and each of the first branch chain and the second branch chain comprises a revolute pair, a sliding pair and a connecting rod therebetween from the top down; the third branch chain in the three branch chains comprises a ball pair, a revolute pair, a sliding pair and connecting rods among the ball pair, the revolute pair and the sliding pair. According to the 2PR and PRS spatial parallel robot mechanism, three mobile movement output can be realized, the mechanism is simple, the processing and the manufacturing are easy, and the kinematic model is simple and can enable kinematic calibration and control to be easy; meanwhile, the mechanism is less in joint, so that the structural rigidity is improved.

The invention relates to a maintaining pipe, in particular to a standby closing pipe for emergency maintaining of a prestress steel cylinder concrete pipe line. The standby closing pipe for emergencymaintaining of the prestress steel cylinder concrete pipe line comprises a fixing pipe, an extending and retracting pipe and an extending and retracting device. The extending and retracting pipe is movably inserted into one end of the fixing pipe. The extending and retracting pipe is connected with the fixing pipe through the extending and retracting device. A sealing ring is arranged between theextending and retracting pipe and the fixing pipe. The end, far away from the fixing pipe, of the extending and retracting pipe is provided with a bellmouth steel ring. The other end of the fixing pipe is provided with an insertion opening steel ring, and the insertion opening steel ring is provided with an o-shaped sealing ring. The standby closing pipe for emergency maintaining of the prestresssteel cylinder concrete pipe line can rapidly maintain an underground damaged prestress steel cylinder concrete pipe, labor and time are saved, the maintained prestress steel cylinder concrete pipe isresistant to pressure and corrosion and long in service just like the original prestress steel cylinder concrete pipe line, the number of joints is small, sealing is good, and leakage is not prone tooccurring.

The invention discloses a machining technology for a low-oxygen bright copper bar and belongs to the technical field of copper machining. The machining technology includes the following steps that firstly, scrap copper is subjected to sorting treatment, the treated scrap copper is thrown into a reflecting furnace to be subjected to be heated and melted, low-temperature slagging-off is conducted, then the temperature is increased to 1300 DEG C or above, and high-temperature oxidization is conducted; and after oxidization is over, poling work can be conducted, and finally the bright copper bar is formed through continuous casting and rolling. The machining technology has the beneficial effects of being high in efficiency, capable of saving energy, uniform in product performance, stable in quality and the like.

The invention discloses an oil separation system structure of a screw air compressor. The structure comprises a combination valve, an oil separation barrel is arranged below the combination valve, an O-shaped ring with sealing effect is arranged at the joint of the combination valve and the oil separation barrel, an oil separation core and an oil filtration core are arranged above the combination valve, the lower port of the oil separation core and the lower port of the oil filtration core are connected with the combination valve respectively, the combination valve is connected with a temperature control valve core, and one side of the combination valve is connected with a minimum pressure valve. After the combination valve is adopted, the oil separation core, the oil filtration core, the minimum pressure valve, the temperature control valve and the like can be easily arranged on the combination valve, so that pipelines and joints are saved and manpower is saved at the same time.

The invention relates to a 2PRU (Pseudo-Random Upstream) and CRS (Central Reservation System) spatial parallel robot mechanism. The 2PRU and CRS spatial parallel robot mechanism is formed by a motion platform, a fixed platform and three branch chains, wherein the three branch chains are used for connecting the motion platform and the fixed platform, the first branch chain and the second branch chain in the three branch chains are the same in structure and are respectively formed by a universal joint pair, a rotating pair, a moving pair and connecting rods among the universal joint pair, the rotating pair and the moving pair from top to bottom, and the third branch chain in the three branch chains is formed by a ball pair, a rotating pair, a cylinder pair and connecting rods among the ball pair, the rotating pair and the cylinder pair from top to bottom. According to the 2PRU and CRS spatial parallel robot mechanism disclosed by the invention, three movable motion output can be realized, the mechanism is simple, processing and manufacturing are easy, a kinematic model is simple, kinematic calibration and control can be easier, meanwhile, joints of the mechanism are less, and the structure rigidity is increased.

The invention relates to a multi-degree of freedom space parallel robot mechanism. The multi-degree of freedom space parallel robot mechanism comprises a movable platform, a fixed platform and three branch chains connecting the movable platform with the fixed platform. The first branch chain in the three branch chains comprises a universal joint pair, a ball friction pair, a cylinder pair and connection rods between the universal joint pair, the ball friction pair and the cylinder pair. The second branch chain comprises a universal joint pair, a moving pair and a connection rod between the universal joint pair and the moving pair. The third branch chain in the three branch chains comprises two rotation pairs, a cylinder pair and connection rods between the rotation pairs and the cylinder pair from top to bottom. Movement output of three movements can be achieved. The multi-degree of freedom space parallel robot mechanism is simple and easy to machine and manufacture. A kinematic model is simple, thus kinematic calibration and control becomes easy, meanwhile, mechanism joints are few, and the structure rigidity is improved.