129results about How to "Strong torsion resistance" patented technology

The invention relates to an integrated working machine for a non-excavation pipeline, belonging to the field of engineering machinery. A rigid working head, a supporting machine, a pipe wall tensioning machine, a spiral pusher, a supporting machine and a control box are spliced to form the integrated working machine for the non-excavation pipeline. The working machine provided by the invention isspecial machinery specially used in cleaning silt, cleaning and checking the dragging and pushing operation in a pipe for a pipeline at the state of non-excavation, and can maintain the partial defects of the inner part of the pipe. The working machine has the advantages of small flooring area, low noise, rapid speed, high concealment, good enginnering safety and civilized construction, does not damage to the ground environment, does not influence traffic, the normal life and working order for people, is environmentally-friendly construction machinery, and is good helper for management pesonnel and maintaining personnel for city management; and the machine has the advantages of working efficiency, low construction cost, energy conservation, time and labor conservation, and high automoticity and is simple in operation, is convenient to maintain the pipeline, the service life of a pipe body is prolonged, the operation cost of the pipeline is reduced, and the econimoc benefit is improved.

The present disclosure provides a lightweight steel-coarse aggregate reactive powder concrete composite beam structure which comprises a plurality of segments, each segment comprising: a steel box girder comprising a bottom plate, a plurality of steel box girder webs and a plurality of steel box girder diaphragms. A coarse aggregate reactive powder concrete bridge deck comprises a plurality of precast bridge decks, a longitudinal wet joint and a transverse wet joint. A plurality of T-shaped pre-embedded steel plates are arranged on the bottom surface of the pre-fabricated bridge deck, the webplate thereof is connected with the steel box girder cross diaphragm plate, the top surface of the T-shaped pre-embedded steel plate is welded with a shear connector, and the shear connector is pre-embedded in the pre-fabricated bridge deck, so that the T-shaped pre-embedded steel plate and the pre-fabricated bridge deck form an integral whole. The invention can improve the mechanical performanceof the steel-concrete composite beam, enlarge the applicable span and scope, improve the construction speed and process quality of the bridge engineering, and overcome the problems of self-weight of the traditional steel-concrete composite beam and easy cracking of the bridge deck without reducing the mechanical performance of the concrete bridge deck.

The invention provides a method for manufacturing a silicon rubber compound insulator. The method comprises the following steps: plating zinc on hardware: the upper end hardware and the lower end hardware are plated with zinc respectively; milling an epoxy glass fiber thread core rod; pressing and connecting the zinc-plating hardware and the epoxy glass fiber thread core rod: the zinc-plating hardware and the epoxy glass fiber thread core rod which are pressed and connected are put in a drying oven for drying and pre-heating; evenly coating a coupler on the surface of the pre-heated epoxy glass fiber thread core rod; putting the epoxy glass fiber thread core rod of which the surface is coated with the coupler and silicon glue in a mold cavity for mold pressing; putting a mold pressing product in a high-temperature cabinet for secondary sulfuration; and passing a test to obtain a finished product. The method has the advantages of scientific process, simple operation steps, strong practicability and scientific improvement on the prior process; and the insulator prepared by the method has the remarkable advantages of improving all technological properties, strong stretch resistance and torsion resistance, good corrosion resistance and insulating property and long service life.

The invention provides a high strength novel hollow insulation composite pipe, comprising an inner pipe and an outer pipe bonded with the inner pipe, wherein the outer pipe is provided with a strengthened bonding layer formed by the glass fiber cloth or glass fiber felt enclosing along the circumference of the composite pipe; the strengthened bonding layer and the glass fiber threads of multistrand impregnating resins are solidified into the outer pipe; when the invention is manufactured, the strengthened bonding layer can be formed on the outer pipe without turning the inner pipe, which is more convenient for manufacturing; moreover, fibers in the glass fiber cloth and the glass fiber felt are staggered, thereby the manufactured outer pipe has better capability of resisting the thermal expansion and cold contraction of the inner pipe when the inner pipe is moistened and the torsional resistance of the hollow insulation composite pipe gets better.

The invention discloses a telescopic handler which comprises a front driving axle and a back driving axle which are provided with tires, a front frame, a back frame, an auxiliary frame, a cab, an engine, a counter weight block and a working device. The working device comprises a movable arm, two movable arm oil cylinders, two rocker arms, a rotating bucket oil cylinder, two pull rods and an object fork. The lower end of the movable arm is hinged on the upper portion of the front frame, the upper end of the movable arm is hinged on the back lower portion of the object fork, the lower ends of the two movable arm oil cylinders are respectively hinged on two sides of the lower portion of the front frame, and the upper ends of the two movable arm oil cylinders are hinged on two sides of the middle of the movable arm. The lower ends of the two rocker arms are hinged on two sides of the middle of the movable arm, the lower end of the rotating bucket oil cylinder is hinged on the upper side of the lower portion of the movable arm, the upper end of the rotating bucket oil cylinder is hinged with the upper ends of the two rocker arms through a connection rod, one ends of the two pull rods are hinged at the position of the rocker arms close to the upper end, and the other ends of the two pull rods are respectively hinged on the back upper portion of the object fork. The telescopic handler is capable of forking materials with large size and weight, long in unloading distance, large in unloading angle and flexible to operate.

The invention provides an FRP-bamboo-concrete combination beam which is characterized in that the structure comprises a bamboo material (1), an FRP tendon (21) or an FRP fabric (22), concrete (3) and a connecting part (4) which are combined together into the FRP-bamboo-concrete combination beam, wherein the FRP tendon (21) or the FRP fabric (22) is positioned in the cross section of the lower-middle part or positioned at the bottom of the bamboo material (1) to bear tension stress, the concrete (3) is positioned at the top or on the two sides of the middle-upper part of the bamboo material (1) to bear compression stress, and the concrete (3) is tightly connected with the bamboo material (1) by the connecting part (4). By making full use of the characteristics of the three materials, the invention greatly improves the sectional inertia moment of the original bamboo beam, thereby effectively improving the rigidity of the original bamboo beam member. The combination beam has the advantages of light weight, high bearing capacity, high rigidity, good torsional resistance, good ductility, high self recovery capability and the like, and can be used as the bending member in the field of a civil construction structure.

The invention relates to a special-shaped composite material shaft, a preparation method thereof, and a connecting method of the special-shaped composite material shaft and metal couplings. According to the preparation method, a method including winding inflatable and deflatable central spindles with a prepreg tape and curing molding is adopted, a first inflating central spindle and a second inflating central spindle are formed and arranged, the prepreg tape is used for winding the central spindles in an inflating state, then the second inflating central spindle is squeezed to tension the prepreg tape and enable the prepreg tape to be adhered to the surface of the first inflating central spindle. According to the method, the special-shaped composite material shaft provided with bulges can be prepared; bulge parts and a shaft body are enhanced by continuously winding the prepreg tape; and the prepared composite material shaft is high in strength and good in performance, and can be connected with the metal couplings. According to the connecting method of the metal couplings and the composite material shaft, the bulges at two ends of the composite material shaft are inserted into connecting holes of the metal couplings, the defect that bolts and other connection manners influence product performance is avoided, and the method has the advantages of high connecting strength, stable structure and strong torsion resistance.

The invention provides an assembly type bamboo bridge. The assembly type bamboo bridge comprises bamboo longitudinal beams (1), bamboo transverse beams (2), bamboo panels (3), transverse pre-stressing tendons (4) and longitudinal pre-stressing tendons (16), the outer surface of a bamboo is sequentially and uniformly coated with a layer of waterborne polyurethane resin, a layer of polyurethane resin, a layer of waterborne polyurethane resin and a layer of resorcinol formaldehyde resin, and the expansion coefficients of the four coating layers are sequentially lessened from the outer surface of the bamboo to outside. The assembly type bamboo bridge provided by the invention has the advantages that the structural strength is large, the ductility is good, a selected material is environment-friendly, standardization degree and assembling degree of structural members are high, the structural integrity is good, the advantages of the material can be fully expressed, and the requirements on normal use and durability of a bridge structure can be met.

The invention relates to a hanging device. The hanging device is arranged between a left wheel and a right wheel under a vehicle body, and comprises a first wheel bracket, a second wheel bracket, a first air spring, a second air spring, a first longitudinal swinging assembly, a second longitudinal swinging assembly, a first Panhard rod, a second Panhard rod, a first air spring support frame, a second air spring support frame and a vehicle body welding support frame. The hanging device has the beneficial effects that the air springs are used for buffering vibration, the taking comfort is improved, a magnetorheological shock absorber is used for attenuating the vibration, the damping is regulated for absorbing energy, the vibration is perfectly attenuated, the structure and material selection of a longitudinal swinging arm is optimized, higher intensity impact and fatigue durability can be borne, in addition, the weight is relatively light, the structure design of stabilizing rods is delicate and ingenious, the material selection is excellent, higher torsion resistance, rigidity and fatigue resistance characteristics are realized, and good effects are achieved for realizing operation and control stability.

The invention provides a hoop type connecting structure for composite thin-walled circular pipes, and belongs to the technical field of composite connection. The problems existing in connection of the composite thin-walled circular pipes at present are solved. The hoop type connecting structure comprises the two pipes to be connected, and is characterized in that butt-joint ports of the two pipes to be connected are each provided with a flange, and the two flanges are in butt joint; two opposite hoops are arranged around the flanges, and the two hoops are connected through two or more bolts; clamping grooves in tight fit with the two flanges are formed in the inner sides of the two hoops respectively, two parallel planes are arranged on the two opposite sides of each flange respectively, and the two ends of each clamping groove are matched with the planes in shape. The hoop type connecting structure is used for connecting the composite thin-walled circular pipes.

The invention discloses an optical fiber grating vibration sensor made of multi-cantilever beam all-insulation materials. The optical fiber grating vibration sensor comprises a vibration sensing system, a base and a top cover. The vibration sensing system comprises a mass block, four cantilever beams with equal lengths and a frame, and the frame is connected with the cantilever beams. The mass block is connected with the frame by the four slice cantilever beams and is supported and suspended by the cantilever beams. Four protruded quadrangular columns with equal heights are arranged at four corners of the base of a sensor, the vibration sensor is arranged in the base, and the frame of the sensor is exactly clamped on the surfaces of the four quadrangular columns, so that the vibration sensor can be suspended in the base. The optical fiber grating vibration sensor has the advantages that the cantilever beams can be driven by the mass block to vibrate along with the mass block when the sensor feels vibration, the wavelengths of a grating adhered on the mass block can vary, and vibration frequencies can be measured according to variation of the wavelengths of the grating; the mass block is fixed by the aid of the four cantilever beams, accordingly, the anti-jamming capacity can be enhanced, high-order modal resonance can be inhibited, vibration signals can be sensitively detected,and excellent insulation effects can be realized by the optical fiber grating vibration sensor owing to the insulation properties of the nonmetal materials.

The invention provides a processing method of a universal joint precision forging with R arc end faces. The processing method comprises the steps of blanking, shot blasting, surface coating, blank heating, forging, quick air cooling after normalizing, shot blasting, phosphorus saponification and cold extrusion forming. Circular arc cold extrusion forming structures are arranged at the parts, corresponding to R arcs of the end faces of the universal joint, of a cold extrusion forming mold. According to the processing method of the universal joint precision forging with the R arc end faces, an original processing technology is improved, during final universal joint cold extrusion forming, circular arc cold extrusion forming surfaces are arranged at the parts, corresponding to the R arcs of the end faces of the universal joint, of the cold extrusion forming mold, and besides, two rods of the universal joint are formed at a time in a forward extrusion mode by virtue of the extrusion mold,so that the metal streamline distribution situation of the forging is excellent, quality of the forging is higher, follow-up machining is not required, and a prepared product is high in strength and excellent in anti-twisting property.

The invention relates to a turntable bearing in a chassis articulated system of an articulated vehicle. The articulated system comprises a front frame, a rear frame and the turntable bearing, wherein the turntable bearing comprises an outer ring and an inner ring; the rear frame is fixedly connected with the inner ring; a steel ball rolling way is formed between the outer ring and the inner ring in the circumferential direction; the outer ring consists of a first outer ring and a second outer ring; a concave step part is formed at the lower end of the second outer ring in the circumferential direction; the first outer ring is arranged on the step part of the second outer ring; and the second outer ring is connected with the front frame into a whole. The turntable bearing has a skilful design, a simple and compact structure, high reliability, light weight and long service life and is easy to process.

A flexible screw comprises an elastic spindle and more than two elastic wire layers tightly wrapping the elastic spindle. Each elastic wire layer is made by winding one or plurality of elastic wires. The elastic wires in the adjacent layers are wound in opposite directions. The outermost layer of elastic wires is further provided with a screw thread; the screw thread and the elastic wires are wound alternately; the height of an operating face of the screw thread is unequal to that of the elastic wires. The flexible screw comprises the elastic spindle, the elastic wires and the screw thread; the elastic spindle is of good elasticity; the elastic wires enhance torsion resistance of the screw; the screw thread is high in hardness and is spirally around the elastic spindle; accordingly, the flexible screw has good axial deforming capacity and as good as a flexible shaft in torsion resistance; meanwhile, the screw thread has high hardness, and the flexible screw can serve as a guide rail or guide channel for use with a screw assembly. The flexible screw can be bent according to users' needs and can be used in a non-linear form, and the screw assembly can move in a curvilinear form.

The invention provides a novel energy-saving bamboo bridge. The novel energy-saving bamboo bridge comprises longitudinal bamboo beams (1), transverse bamboo beams (2), bamboo panels (3), transverse pre-stressed trusses (4) and longitudinal pre-stressed trusses (16). A layer of waterborne polyurethane resin, a layer of polyurethane resin, a layer of waterborne polyurethane resin and a layer of resorcinol formaldehyde coat the outer surfaces of all the bamboo materials of the bamboo bridge in sequence. The bamboo bridge further comprises lighting devices and a brightness sensor, and the lighting devices are controlled to be started through the numerical value measured by the brightness sensor. The novel bamboo bridge can start the lighting device according to the brightness and save energy sources.

The invention discloses an integrated ground heating floor, the upper surface of a ground heating thermal-insulation basal plate (4) is provided with a ground heating trough (1) in which a ground heating tube is paved, and a metal floor (3) is arranged on the upper surface of the ground heating thermal-insulation basal plate (4). The invention is the integrated ground heating floor which has fastheating, convenient maintenance, long service life, environmental protection without harms, simple structure and reliable performance and is used for heating in winter for household and various publicoccasions (closed).

The invention provides a novel ramp bridge structure and a construction method thereof and belongs to civil construction engineering structures. The novel ramp bridge structure is mainly composed of a steel box beam with an asymmetric curve section, a pylon, stay cables, single-column piers, an integrated bridge abutment, disc type anchoring devices, bolt pins, double-lug plates, threaded sleeves and a single lug plate. The novel ramp bridge structure and the construction method of the novel ramp bridge structure have the advantages that the curve beam is of a steel box beam structure and has good torsional property, and the self-weight of the structure is reduced; the section of a beam body is in an asymmetric form, load of the upper structure is borne by the piers and the stay cables jointly, and tumbling damage of the upper structure is avoided while the number of the single-column piers is not increased; the inclined pylon without backstays are utilized to balance horizontal branch force of the stay cables to reduce the internal bending moment of the pylon; the integrated bridge abutment is adopted to provide reliable torsional support for the curve beam and improve the durability and the driving comfort degree of a ramp bridge. The novel ramp bridge structure is suitable for design of most expressway ramp bridges, reliable in structural stress and elegant in modeling and has a certain uniqueness and advantage.

The invention discloses a hot extrusion forming method of a special-shaped square tube. The special-shaped square tube is a square steel tube which is square outside and round inside. The forming method of the special-shaped square tube comprises steps as follows: (1), material inspecting and processing; (2), centering boring; (3), heating treatment; (4), molding ; (5), hot extrusion; (6), demolding; (7), post-processing. According to the hot extrusion forming method of the special-shaped square tube, the technological design is reasonable, the mold structure is simple, the operation is convenient and easy, the forming speed is high, the efficiency is high, and the method is applicable to large-scale industrial production and provides a guidance for the preparation of special-shaped tube stocks; furthermore, the prepared special-shaped square tube has a high finished product rate, high bending resistance and torsion resistance and excellent comprehensive property, and the application field of the special-shaped square tube is effectively broadened.

The invention provides an assembly type bamboo bridge. The assembly type bamboo bridge consists of bamboo longitudinal beams (1), bamboo transverse beams (2), bamboo panels (3), a transverse pre-stressing tendon (4) and a longitudinal pre-stressing tendon (16). All bamboos used by the assembly type bamboo bridge are soaked in a gum dipping tank which contains polyurethane resin and phenolic resin before being assembled, and boiled for 10-15 minutes at 100 DEG C-110 DEG C, wherein the volume ratio of the polyurethane resin to the phenolic resin is (2-2.5):1; and then, the bamboos are got out and dried, and a layer of waterborne polyurethane resin, a layer of polyurethane resin, a layer of waterborne polyurethane resin and a layer of resurcinolformaldehyde resin are uniformly coated on the outer surfaces of all bamboos in sequence. The assembly type bamboo bridge is large in structural strength, good in drawability, green and environment-friendly in used materials, standard in structural components, high in assembly degree, good in structural integrity, and capable of sufficiently bringing the advantages of the materials into play, and satisfying the normal use and durability needs of the bridge beam structure.

The invention discloses a layout structure of a numerical control machine tool. In the whole current machine tool industry, a slant bed body is adopted mostly as the bed body of a turning center, and the conventional structural layout of arranging two spindles and turrets opposite to each other respectively is adopted. In the designed machine tool structure, a rectangular flat bed body is adopted, and a symmetrical structure is formed by arranging two spindles and two turrets in parallel. Since two spindle boxes are arranged in parallel and two turrets are arranged in parallel on the machine tool body, the layout structure has the advantages of light mass, compact distribution, very high torque resistance and shock resistance, and higher accuracy and roughness of machined workpieces.