5results about How to "Improve load resistance" patented technology

The utility model provides a kind of external hexagonal bolt of anti-loosening, including stud, screw head, nut, inner inflation hole, internal thread, inner inflation head and deformation groove, the stud and screw head are integrally set together, the stud is threadedly installed with nut, one end is provided with inner inflation hole, internal thread and deformation groove, the inner inflation head is threadedly connected with the internal thread of stud setting;The utility model improves strength by solid stud (no through hole);Circular array deformation groove cooperates conical inner inflation head, evenly expands to form stable interference when screwing, and the anti-loosening is superior to traditional;Inner inflation head integrally designed, screw rod is directly connected with internal thread, and installation is simple, stress is uniform.

The utility model discloses a kind of load-bearing frame and hydraulic climbing formwork system, the load-bearing frame includes base plate, base frame, rear shift module and additional module;Two and interval, parallel arrangement are equipped with in base plate, the interval between two base plates is equal to the interval in climbing cone to middle;Two and are respectively buckled on one of base plate in base frame, the interval in two base frames to middle is equal to the interval in climbing cone to middle;The connection between two base plates is perpendicular to the axis of base plate, the diagonal error of base plate and base frame is all not more than 2mm;Rear shift module and additional module are all installed on base frame. The hydraulic climbing formwork system includes the load-bearing frame. The load-bearing frame frame body wing risk reduction, load-carrying capacity promotion, the strengthening of structure and the promotion of stability are realized, so that the use safety of the load-bearing frame is better. The rigidity of the load-bearing frame is improved, the turnover efficiency of material is higher, partial buckling and deformation accumulation are avoided, and construction efficiency and construction quality are effectively optimized.

The application discloses a kind of gob-side entry retaining support structure and construction method of steeply inclined coal seam fully mechanized working face.The support structure is arranged in the transport roadway near the side of goaf, including anchoring load-bearing parts, net body gangue retaining parts, restraint reinforcement, pre-stressed locking parts and flexible sealing material;Anchoring load-bearing parts are laid in the roof and bottom corner surrounding rock, net body gangue retaining parts are hung on the exposed section of anchoring load-bearing parts and cover along the whole height of roadway, restraint reinforcement is overlaid on the outside of net body and is connected with anchoring load-bearing parts, pre-stressed locking parts are set on the end of anchoring load-bearing parts and pre-tightening force is applied to form support base surface, and flexible sealing material is sprayed on the support base surface for sealing.The construction method includes drilling anchoring, hanging net body, installing restraint reinforcement, locking pre-tightening, spraying sealing.The application realizes the integration of support structure, has good gangue retaining and sealing effect, adapts to steeply inclined coal seam working condition, is convenient to construct and can be operated synchronously with mining, effectively improves the safety and reliability of gob-side entry retaining, and reduces the cost of mining.

The car seat backrest frame (1) comprises: a first side frame (2) and a second side frame (3) separately arranged in the vehicle width direction; an upper frame (4) connecting the upper end (2a) of the first side frame (2) and the upper end (3a) of the second side frame (3); and an upper bracket (7) mounted on the upper end (2a) of the first side frame (2) and guiding the seat belt. The first side frame (2) is an extruded part extending in the vertical direction of the vehicle, and its lower end (2b) is fixed. The first side frame (2) has a closed section (10) in a cross section perpendicular to the vertical direction of the vehicle. The upper end (2a) of the first side frame (2) is crushed towards the rear of the vehicle, and the thickness of the upper end (2a) in the longitudinal direction of the vehicle is smaller than that of the lower end (2b).

This invention relates to a welding device for steel cages used in the production of utility poles. The device includes a welding lathe with a CNC positioning frame mounted on top. A welding device is fixedly connected to the outer side of the CNC positioning frame, and a welding head is fixedly connected to the bottom of the welding device. Multiple sets of positioning clips for fixing the ends of the steel cage for the utility pole are mounted on the top surface of the welding lathe. The welding head includes a laser emitter fixedly installed at the output end of the welding device. A straight cylindrical welding nozzle is sleeved on the outer side of the laser emitter, and an inner cylinder is provided at the bottom of the laser emitter. The inner cylinder includes three arc-shaped alloy lobes slidably connected to the bottom of the laser emitter. This invention achieves a gradual weld formation, which results in a more uniform stress distribution along the entire length of the weld, eliminating local stress peaks found in traditional equal-width welds. This prevents weld cracking during centrifugal forming, hoisting, and long-term service of the utility pole, and improves the load-bearing capacity and structural stability of the welded joints of the steel cage.