30results about How to "Small shock resistance" patented technology

The invention relates to a precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection and belongs to the technical field of building structures. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection comprises a square-rectangular concrete-filled steel tube column, a reinforced concrete beam, prestressed bars, steel plates, and steel channels. Both the square-rectangular concrete-filled steel tube column and the reinforced concrete beam are precast. The parts, corresponding to the beam section, of the square-rectangular concrete-filled steel tube column and the precast reinforced concrete beam are provided with ducts in which metal bellows are embedded. The steel plates are welded at the connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam. The steel channels are welded on the square-rectangular concrete-filled steel tube column. Ordinary rebars and unbonded prestressed rebars are passed through the metal bellows, and the prestressed rebars are tensioned so that the beam and the column are integrated. The precast concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestressed and ordinary reinforcement for connection has the advantages that construction speed is high, the field welding process is not required, joint connection reliability is guaranteed, seismic performance is good, and the joint has promising application prospect.

The invention relates to a concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection and belongs to the technical field of building structures. The concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection comprises a square-rectangular concrete-filled steel tube column, a reinforced concrete beam, unbonded prestressed bars, steel plates, and steel channels. Both the square-rectangular concrete-filled steel tube column and the reinforced concrete beam are both cast in place. The connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam is provided with ducts in which metal bellows are embedded; the steel plates are welded at the connection sections of the square-rectangular concrete-filled steel tube column and the reinforced concrete beam and are provided with corresponding holes; the steel channels are welded on the square-rectangular concrete-filled steel tube column. The concrete beam and square-rectangular concrete-filled steel tube column combining joint employing unbonded prestress and common reinforcement for connection has the advantages that construction speed is high, the field welding process is not required, joint connection reliability can be guaranteed, seismic performance is good, a connection way of the joint is applicable to side column joints in structures and also applicable to middle column joints, and the joint has promising application prospect.

The invention provides a reinforced truss floor deck and a production method thereof. The method includes: a reinforced truss floor deck includes a truss and a bottom plate, and the truss is fixedly arranged on the bottom plate; the truss includes a plurality of truss units and a The connecting rod reinforcement of the unit, the truss unit includes the upper chord reinforcement set on the first reference plane, the first lower chord reinforcement and the second lower chord reinforcement set on the second reference plane, the first web reinforcement set on the third reference plane and The second web reinforcement set on the fourth reference plane; wherein, the first reference plane, the second reference plane, the third reference plane and the fourth reference plane are determined according to a preset optimization model. The steel truss floor deck can be pre-processed before leaving the factory, reducing the installation workload on site and improving the on-site installation efficiency of the steel bar truss floor deck. At the same time, it has high seismic performance, thereby improving the quality of the corresponding building.

The invention relates to a rectangular concrete-filled steel tubular column node of an unbonded pre-stressing connecting concrete beam, and belongs to the technical field of building structures. The rectangular concrete-filled steel tubular column node comprises a rectangular concrete-filled steel tubular column, a reinforced concrete beam, unbonded pre-stressing tendons, a steel plate and channel steel. The rectangular concrete-filled steel tubular column and the reinforced concrete beam are both formed in a cast-in-situ mode and connected through the unbonded pre-stressing tendons; a hole way is reserved in the connecting cross section of the rectangular concrete-filled steel tubular column and the reinforced concrete beam, and a metal corrugated pipe is embedded in the hole way; the steel plate is welded to the connecting cross section of the rectangular concrete-filled steel tubular column and the reinforced concrete beam, and a corresponding hole is formed in the steel plate; the channel steel is welded to a rectangular steel tube. The rectangular concrete-filled steel tubular column node is high in construction speed, the site welding technology is not needed, the reliability of node connection can be guaranteed, the node has the good shock resistance, the node connecting mode can be used for side column nodes in the structure and can also be used for middle column nodes, and the application prospect is wide.

The invention relates to a novel vertical mechanical reversing energy-saving pumping unit. The novel vertical mechanical reversing energy-saving pumping unit is characterized in that a transmission system adopts a mechanical reversing, two-way gear drive and oil-immersed lubrication fully-enclosed reduction gearbox for realizing the positive and negative rotation of a head sheave of the pumping unit, to ensure the immense inertia of a pumping rod and a counterweight to decelerate, buffer until stop before the pumping unit runs to an upper dead point or a lower dead point, a crank buffer device is arranged so that the impact energy is smoothly absorbed and stored, the stored energy is released after passing through the upper dead point and the lower dead point, and a motor is started at an upper dead point or a lower dead point under the conditions of basically smooth input speed and torque. Through the adoption of mechanical reversing and closed oil-immersed lubrication, the adaptability of the pumping unit to the harsh environment is higher; as the motor runs in the same direction all the time, a complex electric control system is not provided, the reliability is high, and the servicing, the maintenance and the repair are simple; and the equipment is controlled to run by a PLC (programmable logic controller), and importantly, the system adopts a two-way backup, and therefore, both the reliability and the stability of the pumping unit are enhanced.

The invention provides a foldable airport emergency construction composite material composite road panel and a manufacturing method thereof. The composite material composite road panel is composed of a veneer and a connecting cloth; the veneer is a rectangular board, which is laid side by side on the upper and lower sides of the connecting cloth, and the veneers on the upper and lower sides are arranged symmetrically; between the veneer and the connecting cloth Bonded together by epoxy resin; each veneer is made of composite fiber materials, such as glass fiber cloth, ultra-high molecular weight polyethylene fiber cloth and carbon fiber cloth. The material of the combined road panel is light, the density is only between 1.15 and 1.17, and the density is less than one-sixth of the ordinary steel plate. High bending strength of the panel > 280MPa, strong impact toughness > 240K j / m 2 , its strength can meet the carrying capacity of three generations of fighter jets and various types of armed helicopters. This panel has the advantages of high bending strength, strong impact resistance, light material, large area, good aging resistance and durability, easy repair and paving, time-saving and efficient repair, and can be reused.

The invention provides a node for connecting a prefabricated concrete beam with a round steel tube concrete column through unbonded prestressed ribs, and belongs to the technical field of building structures. The node comprises the round steel tube concrete column, the reinforced concrete beam, the unbonded prestressed ribs, an annular plate and channel steel. The round steel tube concrete column (1) and the reinforced concrete beam (2) are both prefabricated; the positions, corresponding to beam sections, of the reinforced concrete beam and of the round steel tube concrete column are provided with hole channels; metal corrugated tubes (4) are pre-buried in the hole channels; the portion, connected with the reinforced concrete beam (2), of the round steel tube concrete column (1) is provided with the annular plate in a welded mode; the channel steel (6) is welded to a round steel tube; the unbonded prestressed ribs (3) penetrate through the metal corrugated tubes (4) and are tensioned so that the beam and the column can be connected into a whole. The construction speed is high, the onsite welding process is needless, reliability of node connection can be guaranteed, good anti-seismic performance is achieved, the node connection mode can be used for a side column node in a structure and can also be used for a middle column node and application prospects are wide.

The invention relates to a mechanical reversing speed reducer and a vertical type pumping unit. The mechanical reversing speed reducer is applicable to various reversing-driving-needing fields of petroleum, mines, ports and the like. A reversing mechanism is characterized in that a motor inputs power into a speed reduction gearbox in which two sets of parallel planetary gear trains are arranged, each of the two sets of the planetary gear trains is shifted through a hydraulic braking device to enable the planetary gear trains to alternately operate in a free state and a speed reduction driving state, the back of the two sets of the planetary gear trains is provided with a merging gear set to merge the power and drive a second stage speed reduction planetary gear train to finally transmit the power to a head sheave, the working condition of the two sets of the parallel planetary gear trains is shifted alternately through the hydraulic braking device, and the mechanical reversing operation of the head sheave is achieved. The reversing mechanism of the mechanical reversing speed reducer and the vertical type pumping unit is long in service life, low in failure rate, stable in operation, highly efficient, energy-saving and compact in structure, and can adjust different travel speed according to specific working conditions so that the oil extraction of an oil well can reach the best economic benefit.