47results about How to "Large tonnage" patented technology

The invention provides a method for duplex smelting for high-nitrogen steel through pressurized ladle refining and pressurized electroslag remelting, and belongs to the technical field of high-nitrogen steel smelting. According to the invention, nitrogen alloying, deep deoxidation and deep desulfurization are sequentially carried out on molten steel in a pressurized steel ladle, and meanwhile, efficient nitrogen alloying is realized in the nitrogen alloying process in the mode that nitrogen bottom-blowing and pressurized gas phase-molten steel interface nitriding are combined, so that nitrogen is uniformly distributed, and the content of impurities in the molten steel is reduced through nickel-magnesium alloy and rare earth; and then the pressurized electroslag remelting is carried out, so that the content of inclusions and impurity elements in the molten steel is further reduced, segregation of the steel is improved, and the high-nitrogen steel is uniform and compact in structure. The result of the embodiment shows that the high-nitrogen steel is low in impurity content, uniform and stable in component and capable of meeting the use requirements in the fields of aviation, aerospace, petroleum, chemical engineering, energy, ocean, bioengineering and the like.

The invention relates to a double-chamber hydragass spring which comprises an upper lug, a lower lug, a main cylinder, an elastic component, a back pressure cylinder, a piston, a guide pipe and the like, wherein the upper lug is positioned at the upper part of the main cylinder; the lower lug is positioned at the lower part of the back pressure cylinder, the upper lug and the main cylinder are connected through a thread structure, and the lower lug and the back pressure cylinder are connected through a thread structure; the upper lug and the lower lug are both provided with a bearing internally; the side part of the upper lug is connected with the elastic component; and the piston and the guide pipe are installed in the back pressure cylinder. The double-chamber hydragass spring is characterized in that the back pressure cylinder, the piston and the guide pipe are connected into a whole and installed in the cylinder body of the main cylinder; a main cavity is formed by a space among the upper surface of the piston, the main cylinder and the space below the upper lug; a main air chamber is formed by the main cavity, an elastic component oil liquid chamber of the elastic component and an air chamber; a back pressure air chamber is formed by a back pressure chamber in the back pressure cylinder and a ring chamber positioned between the main cylinder and the back pressure cylinder; the back pressure chamber and the ring chamber are connected through a connecting pipe. The double-chamber hydragass spring has the beneficial effects of simple structure, small size, light weight, good tightness and large bearing tonnage and is convenient to arrange and install.

The invention relates to a method for manufacturing an aluminum-silicon target, which includes the steps of providing AlSi ingots, and the elongating step. The elongating step adopts a cold drawing operation, and the forging ratio in the cold drawing operation is 1≤X1<2; a thickening step , the forging ratio is controlled to be 2≤X2<3, and cold heading is used for one pier; in the intermediate heat treatment step, the product is kept within the first preset temperature range, and after the first preset time of heat preservation, it is quickly placed in cold water; In the second pier step, the forging ratio is controlled to be 2≤X3<3, and the second pier is also used for cold heading; the preheating treatment step; the rolling step, the product is rolled for multiple passes, and with the increase of the rolling pass , the reduction is reduced; the annealing heat treatment process step is within the annealing temperature range, holding the heat for a third time, and performing water cooling treatment to form the final target product. The present invention reduces the precipitation of Si element by rationally controlling the forging ratio and adopting water cooling as the cooling method, so as to ensure the microstructure and processing performance of the target material.

The invention discloses an overload protection device of a screw open-close machine and belongs to a protection device for the up and down movement of a hydraulic gate. The protection device comprises a screw open-close machine mounting block and a foundation mounting block, wherein a transitional block is arranged between the screw open-close machine mounting block and the foundation mounting block; strain gauges are adhered to side walls of the transitional block; and output lines of the strain gauges output signals from the foundation mounting block to a programmable logic controller (PLC)for processing the signals, and the controller is connected with a motor of the screw open-close machine. An overload protection device is respectively arranged on both sides below the base of the screw open-close machine; the screw open-close machine is fixed on the screw open-close machine mounting block and the foundation mounting block is fixed on the base of the screw open-close machine by foundation screws. The overload protection device has the advantages of: 1, convenient mounting, 2, heavy tonnage, 3, realization of protection by using the negative and positive force principle of theoverload protection device, 4, convenient cable fixation without backward and forward expansion along with the movement of the screw, and 5, convenient maintenance.

The invention belongs to the technical field of building equipment, and provides a detachable tower foundation. The main characteristics are that the tower foundation comprises a base seat and a beam; the base seat is a crossed channel steel base seat formed by a centre base seat and four side base seats connected with the four sides of the centre base seat; a support member is arranged in the base seat; a crossed steel beam in the same shape as the base seat is arranged on and fixedly connected with the base seat; and a tower-crane base seat is correspondingly arranged on the upper surface of the steel beam. Compared with the existing disposable tower foundation and the prior detachable power foundation, the invention has the advantages of easy mounting and detachment, convenient transportation, repeatable use, reduced building cost, and the like.

An anti-buckling supporting member provided with a lattice type three-circular-pipe cross section comprises three anti-buckling branches which are connected through batten pieces of inclined batten pipes, transverse batten pipes and the like as well as end ribbed plates, wherein each anti-buckling branch adopts an anti-buckling supporting member provided with a linear core and a concrete-filled restraint circular steel pipe; the three anti-buckling branches have the same sizes, are parallelly arranged to form a regular-triangle cross section, and are connected through the transverse batten pipes and the inclined batten pipes to form a lattice type member; and the transverse batten pipes and the inclined batten pipes are connected with the constraint circular steel pipes of the anti-buckling branches through intersecting weld. End parts of the linear core members of the three anti-buckling branches extend out of the circumferential constraint circular steel pipes, a ribbed plate is vertically welded at the externally extending section of each core, and the three ribbed plates are interested to the center of the regular triangle and welded to be a whole, so that end nodes of the anti-buckling supporting member are formed. The lattice type cross section facilitates improvement of the bearing efficiency of the anti-buckling supporting member, can remarkably reduce the weight of the member, and meets the design requirement of large-tonnage and ultra-long anti-buckling support in structures of a giant frame and the like.

The invention relates to a hydraulic power explosion-proof diesel steel-wheel common-rail diesel locomotive, comprising an explosion-proof diesel, a hydraulic torque converter, a steering-shifting box, a main body, a frame, a traveling part and assistive devices; wherein, the explosion-proof diesel is provided with an output disk; the hydraulic torque converter comprises a pump wheel, a turbine, a guiding wheel, an output shaft, a base and a pump casing fixedly connected with the pump wheel; the turbine and the guiding wheel are both arranged in the pump casing; the pump wheel is fixedly connected with a pump wheel seat; the turbine is fixedly connected with the output shaft and the pump wheel seat is movably connected with the base; the guiding wheel is fixedly connected with the base; and the output disk is movably connected with the pump casing. The invention has the beneficial effects that the power of the diesel can be thoroughly performed and the working of the diesel under overload can be avoided and the locomotive can automatically change speed and driving force according to the road condition and resistance value to adapt to various conditions so as to realize infinitely variable speeds, high transmission efficiency, stable starting, large driving tonnage and better economic effect and to fully satisfy the requirement of users.

The invention relates to a combined adjustable three-dimensional loading test system applicable to steel concrete members of different sizes and shapes, comprising an assembled base, on which is provided a circular shape that can move along the left and right directions of the assembled base Structure I, there are three return-shaped structures II inside the return-shaped structure I, wherein the return-shaped structure II in the middle is fixed, and the return-shaped structures II on both sides can be assembled along the The type base moves forward and backward; a lifting test platform is arranged in the space surrounded by three back-shaped structures II, and a rear loading oil cylinder for loading the rear part of the reinforced concrete member is provided on the said back-shaped structure I. Said return-shaped structure II is provided with a side loading oil cylinder and an upper loading oil cylinder for loading the side and top of the reinforced concrete member; the loading oil cylinder is pushed and fixed by a moving fixing device.