45results about How to "Same tension" patented technology

The invention belongs to the technical field of security and protection facilities and particularly relates to an invisible anti-theft net comprising an upper beam, a lower beam and steel wires. The upper beam comprises an upper frame body, an upper mounting plate is connected to the upper frame body, and upper mounting holes are formed in the upper mounting plate. Upper wire penetrating holes areformed in the bottom of the upper frame body, wire outlet holes are formed in the rear side wall of the upper frame body, and a fixing mechanism is connected to the rear side wall of the upper framebody. A wire winding mechanism is mounted in the upper frame body, the lower beam comprises a lower frame body, and a lower mounting plate is connected to the lower frame body. Lower mounting holes are formed in the lower mounting plate, and lower wire penetrating holes are formed in the top of the lower frame body. Fixing heads are connected to the lower ends of the steel wires and mounted in thelower frame body, and the steel wires sequentially penetrate through the lower frame body and the upper frame body, are wound around the wire winding mechanism and then penetrate through the rear side wall of the upper frame body to be connected with the fixing mechanism. According to the invisible anti-theft net, the mounting process is simple and rapid, and after tension of one certain steel wire is reduced or the certain steel wire is broken, the other steel wires can still take the protection effect; and the later-period maintenance time can be shortened, and the maintenance cost is reduced.

A metering device for an injection molding unit includes a base body having an antechamber in fluid communication with a feed channel for introduction of plastic material, and a metering chamber in fluid communication with a injection channel. The antechamber and the metering chamber are connectable with one another by a closeable passageway. Movably arranged in the base body between the antechamber and the metering chamber is a displacement member in the form of a piston to separate the antechamber and the metering chamber. The piston has a first end face which demarcates the antechamber and a second end face which demarcates the metering chamber, with the first end face defining an effective area which is smaller than an effective area of the second end face.

The invention relates to an electronic belt scale nutation type belt tensioning device which comprises a tensioning framework, main body lateral plates and a link mechanism, wherein the tensioning framework is spanned over both ends of a driven roller of an electronic belt scale and is positioned between an upper belt and a lower belt, the main body lateral plates are symmetrically arranged at the two outer sides of the tensioning framework, the link mechanism is installed on the main body lateral plates, the link mechanism is formed by sequentially connecting pedestals, first connecting rods, second connecting rods and nutation plates, the pedestals are fixed on the main body lateral plates, the first connecting rods are articulated with the pedestals through first rotating shafts, the second connecting rods are articulated with the first connecting rods through second rotating shafts, and the nutation plates are respectively articulated with the second connecting rods through third rotating shafts and articulated with the main body lateral plates through fourth rotating shafts; fastening bolts are arranged on the nutation plates; wrenches are installed on the second connecting rods; and the nutation plates are also connected with the tensioning framework through first bearings, and the tensioning framework is connected with a central shaft of the driven roller through a second bearing. The electronic belt scale nutation type belt tensioning device has light structure and can rapidly realize the tensioning or relaxation of belts with labor saving, and the size of tensioning force can be accurately regulated in real time.

The invention discloses a tension detection device for textile fabric production, which comprises a base plate, two vertical plates are symmetrically, vertically and fixedly connected to the upper end surface of the base plate, a fixed block is horizontally and fixedly connected between the two vertical plates, an abutting block is slidably arranged between the two vertical plates through a limiting mechanism, a detection mechanism matched with the abutting block is arranged in the fixed block, a transmission mechanism matched with the abutting block is arranged between the two vertical plates, and a cooling mechanism is arranged in the abutting block. When the tension detection device works, no matter whether cloth becomes loose or too tensioned, the tensioning state of the cloth can be adjusted in time, and the tensioning force borne by the cloth is always the same, so that yarn breakage of the cloth can be avoided, the cloth can be prevented from deviating, and meanwhile, cold air can be blown to the cloth in a pulse mode, so that the cloth can be cooled and cleaned, and the use effect is good.

The invention provides a method for compensating tension of elastane yarns of a vertical elastane yarn warping machine. In the method, the total length of the elastane yarns and the preset linear velocity of a creel roller are inputted through an human-machine interface; a programmable controller divides the current elastane yarn into 20 equal parts in accordance with the total length according to the setting of the human-machine interface so as to obtain 21 points; tension values of the 21 points are detected by a yarn tension detecting device, and the final tension values of the 21 points are saved by the programmable controller, and a compensation curve is drawn; the length of the current elastane yarn is detected by an encoder, and the programmable controller calculates a compensation value of the elastane yarn corresponding to the current length according to a mathematical model; and the programmable controller can calculate the linear velocity of the creel roller of the current length according to the compensation value of the elastane yarn corresponding to the current length, which is calculated in the step d, and regulates the linear velocity of the creel roller so as to regulate the tension of the elastane yarn. The method can ensure stable warping quality for the elastane yarn under a condition of large variation of temperature and humidity.

The invention discloses a cloth strip transmission device which comprises a stepping motor, a support and a controller controlling the stepping motor. The output shaft of the stepping motor is provided with a belt wheel, the outer edge of the belt wheel is provided with teeth, and the belt wheel is in transmission connection with the other belt wheel through a synchronous belt. Tooth patterns matched with tooth patterns of the belt wheels are arranged on the inner side of the synchronous belt, and flexible magnetic materials are arranged in the synchronous belt. The upper surface of the synchronous belt in horizontal, a tested cloth strip is horizontally placed on the upper surface of the synchronous belt, a plurality of magnetic metal materials or magnetic bodies are arranged on the cloth strip, and the synchronous belt and the belt wheels are installed on the support. The cloth strip transmission device has the advantages that the device is only provided with the two belt wheels, the motor and the synchronous belt, so that the structure is simple; in addition, the cloth strip is tightly attached to the surface of the conveying belt, metal matter or magnetic media are embedded in the conveying belt, the magnetic bodies or magnets are placed on the surface of the cloth strip for achieving the attachment between the cloth strip and the conveying belt, the tension of the cloth strip is the same all the time, and the operation of the cloth strip is stable; images of the head part and the tail part of the cloth strip can be collected.

The invention discloses a compensation method for a steel wire rope synchronous compensation wheel of a multi-rope winding type elevator. When the steel wire rope synchronous compensation wheel of the multi-rope winding type elevator is used for lifting a container, under the condition that the stress of one steel wire rope is slightly larger due to the fact that the steel wire rope becomes shorter, the stress of the other steel wire rope becomes smaller due to the fact that the steel wire rope becomes longer, and according to a wheel body and a wheel shaft, the wheel body rotates towards the steel wire rope with the length becoming larger and the stress becoming smaller through the lever principle, so that the stresses of the two steel wire ropes are balanced. The tension force of the steel wire ropes of the multi-rope winding type elevator can be balanced flexibly and conveniently, and compensation of asynchronization is achieved; compared with a hydraulic tension balancing system for the multi-rope winding type elevator, the weight is reduced, and the adjustment capacity is higher; the compensation wheel rotates around a mandrel by means of the lever principle, the tension of the steel wire ropes on the two sides can be the same through compensation, and a mechanism is safe and reliable.

The invention relates to a tube cylinder, in particular to a novel skein cage used in the tube cylinder for skein dyeing. The novel skein cage comprises a circular cage body (8), and at least one layer of horizontal separation plate which separates the cage body (8) into relatively independent spaces is arranged in the cage body (8). The novel skein cage is simple in structure and even in stress of yarns in the cage body, does not produce overlapped dead angles, and is good in product quality and high in production efficiency. At least one layer of horizontal separation plate is arranged in the cage body, the yarns cannot be overlapped together during yarn dyeing, the overlapped dead angles and the like cannot be produced, pressure borne by the yarns is even and unanimous, tensile force borne by the yarns during dyeing is same, elasticity of the yarns after dyeing is even, dyeing is even, and quality is unified.

The invention belongs to the technical field of new material manufacturing, and particularly relates to an intelligent die-cutting machine for preparing polyester plastic film sheets. The intelligentdie-cutting machine comprises a base plate. A first reversing roller, a winding roller, a second reversing roller, a conveying roller, a first driving roller and a second driving roller which are parallel to one another are installed on the base plate. A first sealing barrel, a second sealing barrel and a portal frame are also installed on the base plate. A conveying belt is installed on the outersurface of the first driving roller and the outer surface of the second driving roller. Two circular through grooves are formed in the conveying belt, and through holes are evenly formed around the circular through grooves. A hollowed sealing ring is installed on the outer side face of the first sealing barrel, and a first piston barrel is installed on the outer side of the hollowed sealing ring.A second piston barrel is installed on the outer side of the top of the second sealing barrel. A cutting mechanism is installed on a top plate of the portal frame. When the intelligent die-cutting machine is used for circularly cutting polyester plastic films, processing efficiency is improved, harm to the hands of operators by cutting blades is avoided, no wrinkle can be formed on polyester filmstrips in the cutting process, and the edges of the circular sheets are smooth without sawteeth.

The invention discloses a solder resist printing machine for a circuit board. The structure of a screen printing frame comprises a screen mounting opening, a frame body, a pressing opening, an imprinting plate and a pressing sliding block. Symmetrical pressing openings are formed in the upper side and the lower side of the frame body; an impressing plate and a flattening sliding block which are matched with the impressing opening are arranged on the impressing opening; the space in the middle of the frame body is a silk screen mounting opening; a flattening sliding block matched with the pressing opening is mounted in the pressing opening. According to the invention, the two flattening sliding blocks are used for smoothly sliding in the pressing opening provided with the silk screen, thereby preventing a screen made in an inclined weaved manner or made of a nylon material from creasing; by means of the design of the shifting block and the stopping block on the flattening sliding block,the stopping block is convenient for an operator to hold, the stopping block is arranged in front of the flattening sliding block for stopping and increasing friction when the operator holds the flattening sliding block, thereby further preventing an operation from being separated from the handle.

The invention discloses a graphene homogeneous p-n junction structure and a preparation method thereof. The graphene homogeneous p-n junction structure comprises a neutral graphene layer, a p-type graphene layer, an n-type graphene layer and an electrode, wherein the p-type graphene layer is arranged on the surface of one side of the neutral graphene layer, the n-type graphene layer is arranged onthe surface of the other side of the neutral graphene layer, and electrodes are arranged on the surface of the p-type graphene layer and the surface of the n-type graphene layer. According to the invention, the characteristics of the same material of graphene that the thermal expansion coefficient, the electron affinity, the band gap width and the lattice constant are the same are utilized; therefore, the complex interface problem generated by heterogeneous p-n junctions made of different materials and the problems of structural instability, low efficiency and the like of the heterogeneous p-n junctions are avoided, and meanwhile, the p-n junction structure has excellent flexibility and performance and can be used for structural design of flexible electronic devices and research and development of a high-performance miniaturized fine display technology.

The invention belongs to the technical field of textiles and relates to a splicing apparatus on a textile machine. The splicing apparatus comprises a mounting beam, a fastening seat, a horizontal bar,a bobbin holder, and a guide rack. The mounting beam is arranged above the feed end of the textile machine in a front-rear extension manner; the fastening seat is mounted on the mounting beam in front-rear moving manner and comprises a slide sleeve which sleeves a cross beam, and a fastening bolt bilaterally movably mounted at the left end of the slide sleeve; the right end of the fastening boltpenetrates the left wall of the slide sleeve and is abutted to the left end of the mounting beam; the right end of the mounting beam is abutted to the inner side of the right wall of the slide sleeve;the left end of the horizontal bar is fixed to the right end of the slide sleeve; the bobbin holder is mounted at the left end of the horizontal bar; the guide rack is mounted at the right end of thehorizontal bar. A broken yarn can be well added; yarn tension and equal normal textile yarns can be guaranteed, and spinning quality is guaranteed; during single weaving of double cloth, yarns of lowprice can be woven into edge cloth. The splicing apparatus is simple in structure, convenient to operate and widely applicable.