62 results about "Double bundle" patented technology

An “all-inside double-bundle” ACL reconstruction technique, according to which two femoral sockets and two closed tibial sockets are provided to accommodate retrograde fixation of two grafts (for example, two semitendonosus allografts) within the four sockets. At least one of the tibial sockets is formed by using a retrograde drill device provided with a retrograde drill cutter detachable from a retrograde drill guide pin. The femoral tunnels or sockets may be formed by the retrograde drill method or by a conventional method, and may be carried out before or after the formation of the tibial sockets. The grafts (for example, two semitendonosus allografts) are secured in the knee by employing a continuous loop/button construct provided with a button, preferably of titanium alloy, and a continuous loop of suture attached to the button.

The present invention provides a method of performing posterior cruciate ligament replacement. Specifically, a graft tissue is harvested from a patient and single tunnels are prepared in each of the tibia and the femur of the patient. The graft is secured in the femoral tunnel and separated into a posterior cruciate medial bundle and a posterior lateral bundle. The bundles are inserted through the tibial tunnel. During insertion the posterior lateral bundle is positioned in a posterior lateral position in the tibial tunnel while the posterior cruciate medial bundle is positioned in a posterior cruciate medial position in the tibial tunnel. The posterior cruciate medial bundle is then tensioned while the patient's knee is in approximately 90 degrees of flexion, and the posterior lateral bundle is tensioned while the patient's knee is approximately in full extension. Each of the bundles is then secured in the tibial tunnel.

The present invention provides a method of performing anterior cruciate ligament replacement. Specifically, a graft tissue is harvested from a patient and single tunnels are prepared in each of the tibia and the femur of the patient. The graft is secured in the femoral tunnel and separated into an anterior cruciate medial bundle and a anterior cruciate posterior lateral bundle. The bundles are inserted through the tibial tunnel. During insertion the posterior lateral bundle is positioned in a posterior lateral position in the tibial tunnel while the anterior cruciate medial bundle is positioned in an anterior cruciate medial position in the tibial tunnel. The anterior cruciate medial bundle is then tensioned while the patient's knee is in approximately 90 degrees of flexion, and the posterior lateral bundle is tensioned while the patient's knee is approximately in full extension. Each of the bundles is then secured in the tibial tunnel.

Techniques and reconstruction systems for fixation of bone to bone, or soft tissue to bone, that allow a double-bundle type construct with only three tunnels, a single graft and individual tensioning in each of the three tunnels. Alternative double-bundle ACL/PCL fixation techniques are provided that employ a double-bundle type construct with only a single graft and three tunnels/sockets. The double-bundle ACL and PCL techniques and constructs allow individual tensioning of each of the bundles (e.g., tensioning of each of the anteromedial (AM) and posterolateral (PL) bundles of the ACL) and eliminate the need for additional fixation devices (for example, interference screws) to secure the bundles within the bone tunnels/sockets.

The invention relates to a heat exchanger comprising a pair of tube bundles (21, 31) through which the fluid to be heated flows, one primary bundle (21) surrounding a cylindrical burner (40) and the other secondary bundle (31) on which the water steam contained in the combustion gas exhausting from the primary bundle is condensed, whereby the tubes forming the bundles have a flattened section and a helicoidal shape, such that the combustion gas flow between the coils, from the inside to the outside for the primary bundle (21) and in the reverse order for the secondary bundle (31), both bundles being arranged inside a same shell (1). Said heat exchanger is characterised in that the axial dimension (l₂) of the secondary bundle is substantially smaller than the axial dimension (I₁) of the primary bundle, such that an available space for an exhaust trunking (7) is provided at the end of said secondary bundle (31). The present invention also relates to a gas- or oil-fired boiler, especially for domestic application, with high efficiency, space saving and reduced weight.

A three-dimensional mesh or screen in the shape of a simple flat piece of material that can be provided adjacent the graft (i.e., in between graft bundles, or around the graft, or between the graft and the fixation device) for improved strength and structural support for graft fixation. The mesh provides improved methods for installing and securing ligament grafts (such as double-bundle cruciate ligament grafts) with enhanced reconstruction results.

The invention discloses a method for transforming a tangent tower of double-circuit double-bundle transmission lines by lifting in an electrified mode in another place, which belongs to the field of equipment installation. In the method, the current old tower and a common-tower double-circuit transmission lines thereon are involved. The method adopts a construction process of assembling a new tower in the electrified mode at a new tower position by using a landed derrick mast, transferring earth wires from the old tower to the new tower in the electrified state, and dismantling the old tower in the electrified mode in the longitudinal space between the common-tower double-circuit transmission lines, avoids the phenomenon that the two common-tower double-circuit lines have power failure atthe same time, improves the safety and the reliability of a power grid, overcomes the difficulty of an insufficient safe distance between a craning rope and electrified wires, and solves the problemsthat an cross arm member is overlarge, has the insufficient safe distance to the electrified wires, and is difficultly controlled by installation personnel. By slitting a tower body section member into 4 parts according to main materials and craning the 4 parts separately, the craning load of the derrick mast is lowered, and working safety is improved. The method can be widely applied to the fields of the displacement or transformation of the conventional overhead power transmission lines or iron towers.

The invention relates to a connecting plate for replacing an 220kV double bundle conductor strain insulator with centricity and a method thereof; the connecting plate comprises a pulling plate (1) and a screw rod (2) which are connected laterally, opposite junction plates (3) are symmetrically arranged at the outer ends of the pulling plate and the screw rod, and the free end of the junction plate is provided with a connecting hole (4); when the insulator is replaced, the insulation pulling plate is arranged at outer side of an insulator chain, the horizontal load supported by the insulator is transferred by tightening the screw rod, an insulator cradle is used for solving vertical load generated by the own weight after the horizontal load is transferred, and excessive traction force is controlled simultaneously; and finally, the electrical connection of the insulator and the lead wire is disconnected; the invention realizes electrified replacement of the 220kV double bundle conductor strain insulator, the operating process is time saving and labor saving, and is safe and reliable.

The invention discloses a method for replacing ground potentials of a tension insulator string in vertical dual-string arrangement, and the method comprises the following steps: setting a locking device on a front clamp in an unlocking state; installing the front clamp on an assigned position independently; using an operating arm to clamp insulated pulling plates or pulling rods into the front clamp by an operator and then adjusting the insulated pulling plates or pulling rods to the required length by the operator; locking the locking device on the front clamp to finish the installation of the left and right insulated pulling plates or pulling rods; installing a back clamp on a triangle connecting plate at a crosspiece side; connecting lead screws of the back clamp with the insulated pulling plates or pulling rods and then fastening the lead screws at the left and right sides, thus conductor insulators are not strained; then operating the insulation operating arm to stop the operation; and finally taking out the insulators so as to install new insulators at the assigned positions, and then loosening a fixture. The whole fixture is disassembled to be partially installed on electrically-operated double bundle conductors in a vertical arrangement mode, thus solving the problem that the ground potential hot line operation can not be realized by using the traditional construction technologies.

The invention provides a double-bundle artificial ligament and a manufacturing method, an implanting device and an implanting method thereof. The double-bundle artificial ligament comprises a flexible long-strip-shaped body. The long-strip-shaped body comprises a first body segment, a second body segment and a third body segment. The manufacturing method includes the steps that a lateral plate is woven; the lateral plate is cut, and a fold line is set; a first pull wire and a second pull wire are threaded from one side of the fold line to the other side of the fold line; corners are cut; the lateral plate is wound to the fold line from the two sides to form a cylinder; the first pull wire and the second pull wire are tensioned; a wire is wound around the two ends of the long-strip-shaped body. The implanting device comprises a hanging assembly and a fixing assembly. The implanting method includes the steps that the third body segment is arranged on the hanging assembly in a penetrating mode; the hanging assembly is fixed; the first body segment and the second body segment are fixed. According to the double-bundle artificial ligament and the manufacturing method, the implanting device and the implanting method thereof, the problems that knee joint stability can not be recovered, and donor site insufficiency, donor site complications, allograft ligament formation time delay and immunological rejection occur in reconstruction of an anterior cruciate ligament are solved, the reconstruction effect is greatly improved, and the adaptability is high.

The invention relates to an overhead power transmission line operation device, and particularly relates to a vertical double-bundled line outgoing operation platform. The vertical double-bundled line outgoing operation platform comprises a pulley capable of walking on a power transmission line, and is characterized in that the top part of the body of the pulley is further provided with a rotary man-carrying platform, and the rotary man-carrying platform is rotatably connected with the top part of the body of the pulley. The top part of the rotary man-carrying platform is further provided with a line hanging control device at the central position, wherein the line hanging control device is connected with an on-off mechanism of the pulley, and the front end and the rear end of the lower side of the rotary man-carrying platform are fixedly provided with two wheel axles. The line hanging control device comprises a control switch, a line hanging hook, a reset spring and a fuse protection device. The vertical double-bundled line outgoing operation platform is simple in structure, flexible in use, compact and portable, and convenience to assemble and disassemble, can be used in compact tower line live working, solves problems of traditional line outgoing operations, and completes shakeproof hammer reset line outgoing repair work, so that the work efficiency and quality are improved, the labor intensity is reduced, the operation time is shortened, and the operation safety is ensured.

An auxiliary rod for installing a double-split wire spacer, including a cross arm, a left lead screw, a left fixing ring, a right lead screw, a right fixing ring, a connecting sleeve and a telescopic rod. On the left side of the arm, the left fixed ring is set at the left end of the left lead screw, the right lead screw is set at the right side of the cross arm, the right fixed ring is set at the right end of the right lead screw, the connecting sleeve is set in the middle of the cross arm, and the telescopic rod is set At the bottom of the connecting sleeve; through the implementation of the present invention, good results have been achieved: the installation of the auxiliary rod for the double-split wire spacer effectively solves the problem that the distance between the double-split wires is not easy to control through the flexible adjustment of the lead screw and the threaded sleeve. And the fixed size of the double-split wire is stable, easy to install and disassemble, and the effect of use is good, which effectively improves the work efficiency.

The invention discloses a double-bundled-conductor hoisting frame with idler wheels and relates to the technical field of electric power circuit construction. The double-bundled-conductor hoisting frame comprises a hoisting frame body, hanging rings or hanging hooks are arranged on the hoisting frame body, the two idler wheels are arranged on the hoisting frame body, the two idler wheels are arranged in an up-and-down mode or a left-and-right mode, and the axes of the two idler wheels are both perpendicular to conductors. The pair of idler wheels which can revolve around the axes of the idler wheels are arranged on the double-bundled-conductor hoisting frame, therefore, the bundled conductors can slide along with the rotation of the idler wheels when the bundled conductors are placed on the idler wheels to be hoisted, the hard friction between an existing bundled conductor lifting machine and the bundled conductors is avoided, abrasion and breakage to conductor bodies of the bundled conductors in the hoisting process are reduced to the maximum degree, integrity of the conductors is powerfully protected, the work efficiency of electric power circuit remodeling is greatly improved, and the workload of secondary maintenance caused by damage to the conductors is avoided.

The invention discloses a maintenance tool special for dismounting and mounting a double-bundle conductor clamp, and belongs to the technical field of electric system power transformation. The maintenance tool comprises a clamping element, a force applying element and an insurance element and is characterized in that the clamping element is composed of a clamping plate I (1) and a clamping plate II (2), the clamping plate II (2) is connected to the L-shaped clamping plate I (1) through a square concave opening (10), a nut (4) is welded above the clamping plate I (1), a screw rod sleeve (3) is welded to the clamping plate II (2), a screw rod (5) penetrates through the nut (4) of the clamping plate I (1) to be connected with the interior of the screw rod sleeve (3) of the clamping plate II (2), a thread is arranged on the portion, connected with the interior of the screw rod sleeve (3), of the screw rod (5), anti-falling screws (7) are arranged on the two sides of the screw rod sleeve (3), and a safety pin and a safety belt are mounted in two through holes (9) in the back of the clamping plate I (1) respectively. According to the maintenance tool, the work efficiency of dismounting and mounting back the double-bundle conductor clamp can be improved, the labor intensity of a maintainer can be lowered, and human-machine ergonomics is optimized.

Disclosed is an equipotential outlet trolley for a double bundle conductor. The trolley is characterized by comprising two sliding wheel groups with identical structures, each of the two sliding wheel groups comprises four sliding wheels installed between connection plates on two sides through sliding wheel shafts. A support shaft is installed on the connection plate on one side of one of the sliding wheel groups, and a locating rod is installed on the connection plate on the same side of the other sliding wheel group. One end of a movable insulating plate is hinged to the support shaft, and the other end of the movable insulating plate is matched with the locating rod. So as to facilitate the assembly, the two sliding wheels on the upper portion of a conductor and the two sliding wheels on the lower portion of the conductor are installed on two connection plates respectively and assembled at high altitudes. By means of the equipotential outlet trolley for the double bundle conductor, 220-KV double bundle conductors can be subjected to living outlet operation, so that living operation distances among phases can meet technical requirements, personnel and device securities are guaranteed, and the field operation security is improved.

The invention belongs to the field of overhead power transmission lines, in particular to an anti-oscillation interphase hardware tool for a double bundle conductor. The anti-oscillation interphase hardware tool for the double bundle conductor comprises a compound insulator, sub-lead spacers and grading rings, wherein one end of the compound insulator is hinged with one sub-lead spacer by a ZBD-type clevis, and the other end thereof is hinged with the other sub-lead spacer by a right-angle clevis; a turn buckle is arranged between the right-angle clevis and the sub-lead spacer, and the two ends of the compound insulator are respectively provided with one grading ring. The anti-oscillation interphase hardware tool realizes the stepless adjustment of length, can avoid the defect that a bulb falls out, and has the advantages of better stress intensity, more flexible rotation, compact structure, convenient installation and operation, wide applicable scope and the like.

A compression fixing nail for single-tunnel double-bundle reconstruction of cruciate ligaments comprises a fixing body. The compression fixing nail is characterized in that the side face of the fixing nail body protrudes to form a splitting fin extending along the length direction of the fixing nail body; the upper end and the lower end of the big-end-up fixing nail body is in streamline smooth transition, and the cross section of the fixing nail body is water-drop-shaped; slip prevention teeth are formed on the upper section of the splitting fin. By the compression fixing nail for single-tunnel double-bundle reconstruction of the cruciate ligaments, the tendons can be close to anatomy stop-point stress areas, and requirements on anatomy reconstruction are met well; when the compression fixing nail is used together with a belt-carrier steel plate, the tendons are re-distributed at anatomy functional positions while good fixing force is guaranteed.

The invention discloses a special tool for wire routing inspection of the double-bundled transmission lines, comprises two wires, a carrying box, a first arc-shaped plate, a second arc-shaped plate, aconnecting column, a connecting groove, a fixing block, a supporting rod, a tool box, a cover plate, a U-shaped connecting rod and a threaded column. The two wires are arranged in parallel with eachother. The carrying box is arranged at the lower end of the two wires. A notch is formed on one side of the carrying box. An arc-shaped groove is formed in each of the two ports of the notch. The twoarc-shaped grooves are respectively in sliding connection with the first arc-shaped plate and the second arc-shaped plate. The invention relates to a special tool for wire routing inspection of the double-bundled transmission lines. When the sub-interval rod is encountered, the switching lock of one spindle can be opened first, and be relocked after crossing the sub-interval rod. Then a span of another spindle can be completed, the inspection is continued. According to the special tool for wire routing inspection of the double-bundled transmission lines, the invention is safe and labor-saving,and the overhead transmission line routing inspection work time is shortened from the original 2 hours to 30 minutes.

The invention belongs to the technical field of electric power operation and maintenance equipment, and particularly relates to a special conductor lifting device for double-bundled conductors. The special conductor lifting device comprises a conductor lifting device body adopting a bilaterally symmetrical structure, wherein conductor supporting hooks are arranged at ends of the conductor lifting device body, rubber pads are arranged on inner sides of the conductor supporting hooks, the middle of the conductor lifting device body is connected with a steering joint through connecting bolts, the conductor lifting device body is connected with connecting plate supporting frames through two triangular connecting frames, the two connecting frames are parallel to each other, each connecting frame is connected with one connecting plate supporting frame, each connecting plate supporting frame comprises an adjusting screw rod, one end of each adjusting screw rod is connected with the corresponding connecting frame, the other end of each adjusting screw rod is connected with a Y-shaped supporting plate, and a pulley is arranged on the outer side of the conductor lifting device body. The special conductor lifting device has the advantages that connecting plates can be supported, workers can use the device conveniently, and the conductors can be effectively protected.