30results about How to "Improve the ability to resist instability" patented technology

The invention provides a crane and a super hoisting device thereof. The super hoisting device comprises a base, a guide part, an oil cylinder, masts and a connecting rod, wherein the base is connected with a crane arm of the crane; one end of the guide part is connected with the base, and the guide part comprises an accommodating cavity and guide grooves arranged at two sides of the accommodatingcavity; the oil cylinder is arranged in the accommodating cavity, and a first end of the oil cylinder is connected with the base; first ends of the masts are pivotably connected with the base; and a first end of the connecting rod is pivotably connected with the masts, and a second end of the connecting rod is pivotably connected with a second end of the oil cylinder through the guide grooves. According to the invention, the adjustment for the opening angle of the masts can be realized through the guide part and the oil cylinder arranged in the accommodating cavity of the guide part, thus theinstability-resisting capability of the crane arm is improved.

The invention provides a diaphragm opening stiffened bearing cylinder, which comprises a cylinder body and an end frame. The cylinder comprises a lattice rib and an open skin; The end frame comprisesan upper end frame part and a lower end frame part; A lattice rib is arrange on that inner side of the open skin; An upper end frame part is arrange on that top of the cylinder body; The lower end frame part is arranged at the bottom of the barrel. A circular through hole is arranged in the area corresponding to the rhombus area of the open skin, the skin material without radial support area is removed, and a part of the skin is reserved for lifting the tangential bending rigidity of the mesh rib, and the radial rigidity of the mesh rib stiffened bearing cylinder with the mesh rib with a stripsection is improved. The invention can greatly improve the anti-destabilization ability of the diaphragm opening stiffened bearing cylinder, and has strong universality.

The invention discloses a novel sealing ball valve with corrugated pipes. A valve seat assembly A and a valve seat assembly B are arranged on the two axial sides of a valve body respectively and respectively comprise a valve seat body, each valve seat body is provided with a sealing ring forming a sealing pair with a ball body, two corrugated pipes, namely the corrugated pipe I and the corrugated pipe II are installed on the outer ring of each valve seat body in a sectional mode and a sleeving mode and are welded to the two sides of a holder respectively, the other end of each corrugated pipe I is welded to the step surface on the outer ring of the corresponding valve seat body, the other end of each corrugated pipe II is welded to a valve seat check ring, the inner diameters of the corrugated pipe I and the corrugated pipe II of the valve seat assembly A are greater than the inner diameter of the sealing ring of the valve seat assembly A, the inner diameter of the corrugated pipe I of the valve seat assembly B is smaller than the inner diameter of the sealing ring of the valve seat assembly B, and the inner diameter of the corrugated pipe II of the valve seat assembly B is greater than the inner diameter of the sealing ring of the valve seat assembly B. The novel sealing ball valve has the beneficial effect of being applicable to severe working conditions, and valve seats on one side or both sides can realize the bidirectional sealing function.

The invention discloses a non-Newtonian fluid impregnated grid reinforced hydrogen storage pressure vessel structure and technology. It includes fiber-reinforced resin-based composite materials that are prestressed and wound on the inner liner of the gas cylinder, the open end of the metal gas cylinder and the outer surface of the tail end, the reinforcement layer of the grid structure, the fiber protection layer and the anti-corrosion protection at the two ends of the head. The entire structure of the gas cylinder container is reinforced with a grid structure reinforcement layer, and the fibers used in the formation of the grid structure reinforcement layer are impregnated with non-Newtonian fluid, dried and then impregnated and wound; firstly, the casting method is used The soft grid structure molds for the cylinder body and the two ends of the head are molded separately, and then bonded to the outer surface of the gas cylinder after winding the fiber reinforced resin-based composite material by joint bonding, and then the grid structure reinforcement layer is formed. The hydrogen storage pressure vessel prepared by the invention has the characteristics of high rigidity, impact resistance, light weight and low cost.

A large-angle flexible laminated single-tooth or dual-tooth shaft coupler is composed of internal central hole for shaft, screw holes, external arcs, and femal arcs for single-tooth one or the male arcs and female arcs for dual-tooth one. Its advantages are large compensating angle, high stability and long service life.

The invention provides a crane and a super hoisting device thereof. The super hoisting device comprises a base, a guide part, an oil cylinder, masts and a connecting rod, wherein the base is connected with a crane arm of the crane; one end of the guide part is connected with the base, and the guide part comprises an accommodating cavity and guide grooves arranged at two sides of the accommodatingcavity; the oil cylinder is arranged in the accommodating cavity, and a first end of the oil cylinder is connected with the base; first ends of the masts are pivotably connected with the base; and a first end of the connecting rod is pivotably connected with the masts, and a second end of the connecting rod is pivotably connected with a second end of the oil cylinder through the guide grooves. According to the invention, the adjustment for the opening angle of the masts can be realized through the guide part and the oil cylinder arranged in the accommodating cavity of the guide part, thus theinstability-resisting capability of the crane arm is improved.

The invention discloses a hydro-mechanical deep drawing forming method capable of improving surface precision of a large-scale thin-wall curved-surface part, and relates to hydro-mechanical deep drawing forming methods. The problems that the curved-surface part is prone to be locally wrinkled and the surface precision is affected in the deep drawing process are solved. Concentric circles with certain distances are carved in the upper surface of an auxiliary forming sheet, the auxiliary forming sheet and a target forming sheet are stacked on a female die, and deep drawing forming is carried out on the auxiliary forming sheet and the target forming sheet. A gap generated by resilience of the auxiliary forming sheet and resilience of the target forming sheet is utilized for separating a deep drawing piece. The diameters and the thicknesses of the concentric circles of the deep drawing piece of the auxiliary forming sheet are measured. Normal inside offsetting is carried out on a molded surface generatrix of an initial deep drawing male die at the corresponding position. Fitting is carried out on an offset point, and the surface generatrix considering deformation and thinning of the auxiliary forming sheet can be obtained. According to the fitted surface generatrix, the initial deep drawing male die is finished, and an ideal deep drawing male die surface is obtained. Deep drawing forming and separation of the auxiliary forming sheet and the target forming sheet are carried out again, and the large-scale thin-wall curved-surface part with improved surface precision can be obtained.

A large-angle flexible laminated single-tooth or dual-tooth shaft coupler is composed of internal central hole for shaft, screw holes, external arcs, and femal arcs for single-tooth one or the male arcs and female arcs for dual-tooth one. Its advantages are large compensating angle, high stability and long service life.