49results about How to "Improve tensioning efficiency" patented technology

The invention discloses a cable tensioning device for high-altitude power construction, which comprises a walking mechanism and a supporting plate, the supporting plate is mounted on one side of the walking mechanism, a steering mechanism, a swinging mechanism, a coiling mechanism and a return-preventing mechanism are mounted on the supporting plate, the steering mechanism is mounted at one end of the supporting plate, the swinging mechanism is installed on one side of the steering mechanism and matched with the winding mechanism, and the winding mechanism is installed on one side of the swinging mechanism. The device can automatically move to a telegraph pole, a worker does not need to carry the device, the labor intensity of the worker is greatly relieved, the cable winding mechanism in the device can tension a cable, the swinging mechanism can ensure that the cable is uniformly wound on the cable winding mechanism when the cable is tensioned, the subsequent worker can conveniently process the cable in a unified mode, the return-preventing mechanism can prevent the winding mechanism from rotating, and the wound cable is released again, so that the cable tensioning quality is ensured, and the cable tensioning efficiency is improved.

The invention discloses a steel-ultra-high-performance concrete combined continuous beam bridge structure and a construction method thereof. The combined continuous beam bridge structure comprises a continuous beam formed by splicing M steel-ultra-high-performance concrete combined beam sections and (M+1) steel-high-intensity concrete combined beam sections; the steel-ultra-high-performance concrete combined beam sections and the steel-high-intensity concrete combined beam sections are distributed in a staggered manner and M is more than or equal to 2; the M steel-ultra-high-performance concrete combined beam sections are supported on M bridge piers respectively; each steel-ultra-high-performance concrete combined beam section comprises a second steel beam segment and an ultra-high-performance concrete board; the construction method comprises the following steps: 1, prefabricating and machining; 2, mounting a lower part beam body and a first steel beam segment; 3, hoisting a high-intensity concrete board; 4, mounting a steel-ultra-high-performance concrete combined section; 5, carrying out wet joint construction. The steel-ultra-high-performance concrete combined continuous beam bridge structure and the construction method thereof have the advantages of reasonable design, simplicity and convenience in construction and good utilization effect, and the problem that a hogging moment region of an existing steel-concrete continuous beam bridge is cracked and the problem that the pre-stress efficiency is low can be solved.

An unbounded bar circular anchor sealing system comprises anchor plates used for anchoring unbounded bars, clamping pieces, transition tubes, tight coupling tubes, bolts, pressing plates and sealing rings, wherein step holes are formed in the large taper hole end and the straight hole end of each anchoring plate respectively, and each unbounded bar is sleeved with a corresponding locking ring, the corresponding transition tube, the corresponding pressing plate, and the corresponding tight coupling tube provided with the corresponding sealing ring in sequence in the installation state; each unbounded bar extends into a corresponding hole of the corresponding anchoring plate, the end face of each clamping piece sinks to the position below the end face of the corresponding anchoring plate after being completely tensioned, each pressing plate tightly presses the corresponding tight coupling tube through the corresponding bolt, each sealing ring is matched with a counter bore of the corresponding anchoring plate, and each clamping piece end is arranged in a sealing sleeve to achieve clamping piece end radial seal; the small end of corresponding tight coupling tube is of a conical structure and in expanding fit with the corresponding transition tube in a sealed mode; each unbounded bar with a PE tube stripped off as the requirement of tensioning construction is held by the corresponding transition tube, each transition tube is then in lap joint with the PE tube of the corresponding unbounded bar and locked by the corresponding locking ring, and an unbounded bar and clamping and anchoring unit fully-independent sealed structure is formed by each unbounded bar. The installation and construction method is simple, and construction efficiency can be improved greatly.

The invention provides an adjusting method of continuous deck structure bridge inhaul cable internal force. The adjusting method is characterized by including following steps: step 1, after all inhaulcables of a bridge are tensioned for the first time, adopting a frequency method to recognize actual internal force of each inhaul cable; step 2, building a bridge structure finite element model; step 3, in consideration of temperature impact, analyzing and calculating final tension amount of each inhaul cable of the bridge under action of applied and adjusted internal force on the basis of the bridge structure finite element model; step 4, adjusting the bridge inhaul cable internal force according to the final tension amount of each inhaul cable: converting the tension amount of each inhaulcable into rotating angle of an anchor head nut of the inhaul cable, and adjusting the bridge inhaul cable internal force according to the nut rotating angles acquired by calculation. The method can ensure accuracy of inhaul cable internal force adjustment and substantially improve tension efficiency of the inhaul cables, is quite convenient to implement and has great popularization and application value in inhaul cable internal force adjustment of bridge newly-building or old bridge cable replacing projects.

The invention discloses a tension support mechanism of a compact spinning device. The tension support mechanism comprises two tension support seats which are arranged on the lower side of a negative pressure gathering tube, a tension support frame and two positioning spring pieces, wherein the tension support frame comprises a tension rod and more than three limit sliding seats which are transversely arranged along the tension rod at intervals and prop against the lower part of the tension rod through an adjusting spring; the bottom of each limit sliding seat is provided with a stop block; a connection surface of the two positioning spring pieces is connected with the two tension support seats respectively; an adjustment mounting surface of the two positioning spring pieces is compressively jointed with two ends of the tension rod respectively; the two ends of the tension rod are arranged in mounting holes of the two tension support seats; and the adjustment mounting surface of the two positioning spring pieces is provided with a fitting surface and an inner protrusion. The tension rod can be arranged on the two tension support seats through the two positioning spring pieces, and a lattice apron is convenient to assemble and disassemble and can be reliably limited by turning the tension rod.

The invention discloses a pre-tensioning machine, which comprises a base frame, a linear stretching device and a steel bar fixing piece. The first end of the base frame is provided with an end seat anchorage, the second end is provided with a fixing seat, the linear stretching device and The steel bar fixing parts are respectively located between the first end and the second end of the bottom frame. One end of the linear stretching device is connected with the fixing seat, and the other end is connected with the steel bar fixing parts. The guide mechanism is guided by the movement of the steel bar, and the moving direction of the steel bar fixing part is consistent with the stretching direction of the linear stretching device. With this device, one end of the steel bar is fixed by the end seat anchorage, and the other end is fixed by the steel bar fixing piece. The linear stretching device drives the steel bar fixing piece to perform pre-tensioning. The guiding mechanism on the bottom frame guides the movement of the steel bar fixing piece. Prevent the linear stretching device from shifting when pulling the steel bar, ensure the same pre-tensioning force of the steel bar, improve the tensioning efficiency of the steel bar, and the structure of the device is simple without frequent setting of suspension counterweights.