31results about How to "Meet tension requirements" patented technology

The invention provides a device assembly for tensioning a fork ear type stay rope or a steel pull rod. The device assembly comprises a counter-force rack, a tensioning rod, a carrying pole beam and a jack; the counter-force rack is of a similar U-shaped structure and divided into two pieces; the opening of the U-shaped structure is designed into a step shape, and a bolt holes and a tensioning rod semicircular groove I to allow the tensioning rod to pass through are formed in the step; the carrying pole beam is of a split two-half structure, and the stay rope or the steel pull rod is capable of passing through the middle of the split two-half structure, and tensioning rod semicircular grooves II for mounting the tensioning rod are formed on the two sides of the split two-half structure; when the device assembly is applied to tensioning construction, the two pieces of the counter-force rack are mounted on the two sides of the fork ear of the fork ear type stay rope or the steel pull rod and are integrated by use of a bolt and a connecting plate; the two-half carrying pole beam is mounted on the extension cylinder end of the fork ear type stay rope or the steel pull rod and fixed by use of a bolt; the tensioning rod is put through the carrying pole beam and the counter-force rack, and anchored by use of a fixing nut at one end of the counter-force rack; the jack and a base plate are mounted on the other end of the tensioning rod and the other end of the tensioning rod is anchored by use of a tensioning nut; the device assembly is good in safety and high in universality in tensioning construction.

The invention discloses a manufacturing method for a composite silk screen printing plate. The manufacturing method comprises the following steps: a) cutting a steel wire screen into a required dimension; b) putting a horizontal supporting plate on a hydraulic lifting platform, and flatly putting the cut steel wire screen on the center of the supporting plate; c) moving the hydraulic lifting platform on which the steel wire screen is placed to the center of a screen stretcher and operating the hydraulic lifting platform to enable the plane of the supporting plate to be lower than a screen stretching surface of the screen stretcher; d) getting and fixing a polyester screen on the screen stretcher to perform stretching operation; e) lifting the hydraulic lifting platform to enable the steel wire screen to contact with the polyester screen; f) splicing the steel wire screen with the polyester screen; g) trimming the superposed polyester screen to obtain a composite wire screen; h) performing stretching operation on the composite wire screen; i) replacing a plate frame; j) splicing the polyester screen with the plate frame; k) removing the excessive polyester screen outside the plate frame to obtain a required composite silk screen printing plate. The manufacturing method is simple to operate, low in cost and capable of completing the manufacturing only through the hydraulic lifting platform and the screen stretcher.

The invention discloses a let-off mechanism, a rapier loom comprising the same, and a control method for the let-off mechanism. Compared with the prior art using individual control technology, the link between let-off mechanisms is enhanced; certain rotation speed ratios are provided for all let-off rollers through setting a transmission ratio for a speed changer; during a let-off process, intermediate driving values of the speeds of the multiple let-off rollers are obtained through the detection performed by sensors and the calculation performed by a controller, the mean value of the multiple intermediate driving values is worked out, and the rotation speed change of a driving motor is controlled according to the mean value; the improvement of the accuracy and stability of the rotation speed change is facilitated; the rotation speed change directions of the let-off rollers are the same all the time, so that the uniformity of the change tendencies of warp yarns on all the let-off rollers is facilitated; and the reduction of the influence, caused by the rotation speed change of the driving motor, on the instant tension of the warp yarns can be facilitated through a step of calculating the intermediate driving values and a step of calculating the result driving value, so that the stability of the tension of the warp yarns can be guaranteed and the tension tends to reach a preset value of the controller.

The invention discloses an elevator traction steel belt testing method and device. The front side and the back side of a traction steel belt to be tested sequentially pass through two or more belt wheels, certain load force is applied to the traction steel belt to be tested through a counter weight mechanism, a driving wheel is driven through a power source and a transmission mechanism so that the traction steel belt to be tested can be driven to continuously move along the belt wheels, when a certain point of the traction steel belt to be tested passes through one belt wheel each time, bending testing is completed once, and therefore finally, the traction steel belt to be tested with bend testing performed for needed times can be obtained. According to the method and device, testing efficiency is improved, when the power source rotates once, bending testing is performed on the front side and/or the back side of the traction steel belt to be tested at least twice, testing efficiency is greatly improved, the front side and the back side can be tested at the same time, the testing condition can more approach the real using environment, the load force is directly applied to the traction steel belt to be tested through the counter weight mechanism, the magnitude of the load force can be more visualized, and the requirement for tension of the traction steel belt within different ranges can also be met.

The invention relates to a center disposed tension device of a warping machine, which is characterized in that: the motor is a vector frequency control motor electrically connected with an automatic control device for controlling rotation speed of let-off tension roller; the tension roller is disposed on bottom portion between two yarn guide rollers; pins are disposed on inner surface of the yarn outlet on the wall of the left box body and the right box body respectively, two connection plates are movably engaged with pins through a central hole, both ends of the tension rod (a) and the tension rod (b) are attached on both sides of the pin engaged with central holes of two connection plates; a pressure sensor contact is disposed on inner surface wall of left or right box body, which is in contact with the bottom side of the tension rod (a) axle neck permanently. The center disposed tension device makes the yarn form a wrapping angle through the yarn guidance roller, the tension roller, and the yarn guidance roller, makes the yarn and the yarn guidance roller generates adhesion, implements closed-loop control to the yarn tension through on-line detection of the pressure sensor, and satisfies needed tension requirements in the warping process.

The invention discloses a warp loom yarn tension compensating device which comprises a transmission main shaft, a tension bar, a tension sheet, an eccentric shaft, a connecting rod, a swing sleeve and a transmission mechanism, wherein the transmission main shaft is installed in the oil tank of a warp loom; the tension bar is installed on the frame of the warp loom; the tension sheet is installed on the tension bar; the eccentric shaft, the connecting rod and the swing sleeve are rotatablely installed on the frame of the warp loom; the transmission mechanism is arranged between the transmission main shaft and the eccentric shaft; one end of the swing sleeve is fixedly connected with the tension bar, and the other end of the swing sleeve is rotatablely connected with the upper end of the connecting rod; the lower end of the connecting rod is rotatablely connected with one end of the eccentric shaft, and the eccentric shaft is driven to rotate by the transmission main shaft; and the transmission mechanism can be composed of a driving synchronizing wheel fixedly arranged on the transmission main shaft, a driven synchronizing wheel fixedly arranged on the eccentric shaft, a middle transition synchronizing wheel rotatablely installed on the oil tank and synchronizing belts arranged between every two synchronizing wheels. When the yarn is woven to form loops, the invention can compensate the yarn tension in time, so that the yarn tension is kept consistent. The invention is suitable for popularization in warp looms.

The invention relates to the technical field of composite material automatic formation, in particular to a strip winding device. The strip winding device comprises a mandrel, a velometer, a traction assembly, press rolls, a width sensor and an unwinding shaft. The traction assembly comprises a first traction roller and a second traction roller. The mandrel, the first traction roller, the second traction roller and the unwinding shaft are sequentially arranged. The velometer makes contact with the mandrel, the width sensor is arranged between the first traction roller and the second traction roller, and the mandrel, the first traction roller and the second traction roller are respectively provided with the press rolls. The invention further provides a strip winding method and a numerical control winding machine thereof. According to the strip winding device, because the width sensor and the traction assembly are arranged at the near end of the strip winding mandrel, a deformed strip isadjusted and then enters the mandrel, the measures of monitoring on a middle conveying line of the strip can be greatly lessened, the device is simplified, and the efficiency is improved.

The invention belongs to the technical field of textiles, and particularly relates to a crystal cotton three-mercerized fabric and a processing method thereof. Fibers are subjected to liquid alkali or liquid ammonia tension mercerization and then are processed into yarns under conventional procedures, and finished mercerized yarns are prepared through procedures of singeing, reeling, mercerizing, dyeing, setting and the like. The mercerized yarns produced by the method are uniform in mercerizing, full in color and good in dyeing effect. By a mercerizing device, the fabric automatically passes through a caustic soda solution and clear water, so that the fabric keeps certain tension all the time, the tension requirement of fabric mercerizing is met, the softness is improved, and the finished product rate of the fabric can be effectively improved; and the yarns only need to be mercerized once after fiber mercerizing, so that two times of reeling, drying and rewinding are avoided, the production and processing cost is saved, and the yarn loss is reduced.

The invention relates to an easily degradable collagen thread. The easily degradable collagen thread comprises an inner layer of collagen fiber silk threads, a plurality of outer layers of collagen fiber silk threads and a sericin layer, wherein the outer layers of collagen fiber silk threads are parallel to one another and spirally wound on the surface of the inner layer of collagen fiber silk threads to form an outer layer, and the sericin layer is arranged on the surface of the outer layer. The invention further provides a preparation method of the easily degradable collagen thread. The easily degradable collagen thread has the following beneficial effects that the requirement for tension during sewing is met, and the inner layer of collagen fiber silk threads, the outer layers of collagen fiber silk threads and the sericin layer are all made of materials which can be absorbed by a human body, so that the easily degradable collagen thread is conveniently absorbed by a patient; meanwhile, the suture thread has the advantages of no irritation, no toxic or side effect and no scar at the stitch of the suture thread after healing.

The invention discloses a weft yarn cutting mechanism of a warp knitting machine. The weft yarn cutting mechanism comprises a weft yarn cutting box, four connecting posts, an anti-slip bottom foot, afeeding pipe, a control panel, a control box, a display screen and an indicating lamp, wherein the four connecting posts are arranged at the lower surface of the weft yarn cutting box. The weft yarn cutting mechanism of the warp knitting machine has the advantages that the weft yarn cutting box consists of a collecting device, an assistance cutting mechanism, a tension regulating device, a coolingdevice, a starting device, a rotating mechanism and a traction device; the weft yarns can be effectively and flatly dragged and pulled into a conveying guide rail for cutting during the weft yarn guiding; the effect of improving the weft yarn quality is achieved; meanwhile, before the weft yarn cutting, the weft yarn can be abutted to the set cutting position; the tension requirement of the weftyarn can be met; the cutting treatment can be performed, so that the weft yarns maintain certain tension; the winding generated by the weft yarns in the fast yarn conveying an cutting process due to looseness can be prevented.

The invention discloses a pre-tensioning method precast beam tensioning concrete reaction wall which comprises a side jack, a reaction wall body, ear walls, a pull rod, an anchoring vehicle, a plurality of steel strands, a bogie, a vertical jack, a main bogie and a concrete bearing platform foundation, the rear end of the reaction wall body is connected with the two ear walls, one end of each steel strand is fixed to the anchoring vehicle, and the other end of each steel strand is fixed to the pull rod. The vertical jack is fixed to the concrete bearing platform foundation and drives the main bogie to move up and down so as to provide pulling force of the steel strand, and the reaction wall and the lug wall are fixed to the concrete bearing platform foundation. According to the device, through cooperation of the reaction wall, the lug wall, the pull rod, the anchoring vehicle, the steel strands, the bogie and the vertical jack, the vertical jack is driven to conduct tension transmission, the anchoring vehicle is tensioned to meet the tensioning requirement, the device is applied to tensioning construction of a pre-tensioning method precast beam, and the problems that the pre-tensioning force is large, and safety is insufficient are solved.

The invention discloses a tensioner, a front end wheel train system and a vehicle, and solves the technical problems that in the prior art, due to the fact that the tension of a system belt is too high, all accessories are abraded, the belt is abraded, the friction loss of the system is increased, and then the oil consumption level of an engine is influenced, the tensioner comprises a base, a rotation driving mechanism and a tensioning assembly; wherein. The base is provided with a mounting cavity; the tensioning assembly is rotationally arranged on the base; the rotation driving mechanism comprises a force transmission piece, a power piece and a cam driven by the power piece to rotate. The force transmission piece and the cam are rotationally arranged in the mounting cavity, and the power piece is connected to the base; the force transmission piece is provided with a first contact part acting on the cam and a second contact part acting on the tensioning assembly, so that the cam drives the force transmission piece and the tensioning assembly to rotate in the circumferential direction of the force transmission piece, the requirement adjustment of the belt tension is achieved, the tension needed under different working conditions is adapted and matched, and the purposes of reducing the friction work of an engine and reducing the oil consumption of the engine are achieved.

The invention provides a processing method for environmental fabric, and belongs to the technical field of machinery. The processing method solves the problem that existing fabric is poor in hand feel. The processing method for environmental fabric comprises the following steps of A, material preparation, B, fabric weaving, C, fabric mercerizing, and D, sizing. A fabric mercerizing device comprises a support, a caustic soda container, a clear water container and transition rollers, wherein the transition rollers comprise the first transition roller, the second transition roller and the third transition roller; the upper portion of the caustic soda container and the upper portion of the clear water container are both provided with openings, the bottom of the caustic soda container and the bottom of the clear water container are both fixedly connected to the support, the first transition roller is connected into the caustic soda container, the second transition roller is connected to the support and located above the caustic soda container and the clear water container, and the third transition roller is connected into the clear water container. The method is easy to implement, and the yield is high through the device.

The invention discloses a hydraulic tensioning device for a rubber track tensioning wheel. The hydraulic tensioning device comprises an oil inlet pipe joint, a pressure gauge, a wall penetrating pipejoint, a three-way pipe joint, a high pressure oil pipe, a joint body, a tensioning cylinder and a nut. The hydraulic tensioning device is characterized in that the pressure gauge and the oil inlet pipe joint are installed on the outer side plate of a frame body upper frame, and the oil inlet pipe joint is connected with the tensioning cylinder and the pressure gauge through the wall penetrating pipe joint, the three-way pipe joint and a hydraulic hose. The tensioning cylinder is installed in the square tube of a frame body lower frame main beam, and the piston rod of the cylinder props against a tensioning bracket of the tensioning wheel, to realize tensioning of the tensioning bracket. The hydraulic tensioning device has the effects that the tensioning requirement of a triangular track wheel train walking system of a combine harvester can be met, a rubber track is ensured not to fall off during the transmission process, the impact, on the road surface, of a wheel train can be effectively reduced, dual functions of shock absorption and tensioning are fulfilled, the hydraulic tensioning device can automatically adapt to the tensioning amount, and manual adjustment is not needed.