50results about How to "The stress state is reasonable" patented technology

An insulation cover for iron comprises a bag-shaped body for containing the iron; the body is provided with an opening which is used as an entrance for the iron; the opening of the body is provided with a zip-fastener for closing the opening; the body is provided with a hanger. After the iron being placed into the body via the opening, zip up the opening, then the iron is covered inside the insulation cover and thus it can be placed on a horizontal surface directly; or be hanged with the cover by the hanger.

The invention discloses a high-load and high-precision pneumatic force measurement device and a measurement method. An internal balance tail-supported aerial vehicle model is adopted to execute pneumatic force test in the prior art, and rising force of an aerial vehicle perpendicularly works on a cantilever type tail rod, so that the model severely shakes during the test. The high-load and high-precision pneumatic force measurement device comprises a balance and a supporting rod, wherein the balance adopts an internal balance and is connected with a balance sleeve; the supporting rod is connected with an incidence angle sliding rail mechanism, a side sliding angle mechanism connected with the incidence angle sliding rail mechanism, and a mechanism control and data acquisition device; the supporting rod is adopted to be connected with the balance and support the model; the internal balance is adopted to measure the pneumatic force of the aerial vehicle model; the balance is externally connected with a sleeve structure and is also connected with a data acquisition device; the data acquisition system obtains the pneumatic force on the model and is connected with automatic control equipment; therefore, the pneumatic force on the model can be obtained. The high-load and high-precision pneumatic force measurement device and the measurement method are used for measurement in a pressurized high-density and low-speed wind tunnel.

The invention discloses a Pico / Nano satellite and rocket fixing and separating device. The Pico / Nano satellite and rocket fixing and separating device comprises a bottom plate. Satellite supporting bases, pull rods, pull rod cut-off mechanisms and satellite popping mechanisms are fixed to the bottom plate. At least one pair of satellite supporting bases is arranged. Any one pair of satellite supporting bases is oppositely arranged in pairs. At least one pair of pull rods is arranged. Each pair of pull rods is installed in any one pair of satellite supporting bases respectively. Each pull rod stretches out of a satellite supporting face of the corresponding satellite supporting base to be connected with a satellite and presses the satellite on the satellite supporting face. According to the Pico / Nano satellite and rocket fixing and separating device, when the satellite and the bottom plate are connected, pull force and pressure exerted on the bottom plate are exerted on the same straight line, and therefore the interaction force between the bottom plate and the satellite is reasonably distributed, the integral structure is simple and stable, meanwhile, installing is convenient, and the manufacturing cost is low.

The invention discloses a method for determining and rapidly realizing bridging optimum cable forces of rigid framework-arch composite bridges. According to the method, a constraint cable force optimization method and an influence matrix method are comprehensively applied in the optimum cable force determination process, and mutual influence matrixes between cable forces are imported, so that theconcept is clear and the bridging optimum cable forces of rigid framework-arc composite bridges can be rapidly determined without iteration. Under a bridging optimum cable force combination determinedby utilizing the method, stress states of both the main and subordinate structures of the rigid framework-arc composite bridges can be reasonable. Moreover, the invention provides a method for rapidly realizing optimum target cable forces via measured bridging cable forces, so that the problem of repeated adjustment of the traditional cable adjustment methods is avoided, and the time and labor costs are saved; and the method is efficient and rapid.

The present invention discloses a rotary transplanting mechanism of ambulating seedling transplanter. A central chain wheel in chain wheel box drives left / right gear boxes fixed to the two ends of central shaft. Fixed central gear meshes planetary gears fixed to planetary shaft by middle gears and planetary gears rotate with unequal speed relatively to gear box. A planting arm is fixed to an end of planetary shaft outside the said gear box, and its absolute motion is synthetic motion of unequal speed rotation of planetary gears relatively to gear box and circumferential motion of gear box relatively to shaft. The gear box is rotated through one cycle,and can make planting arms operating by once. So the said invention can be fitted for working frequency of ambulating seedling transplanter.

The invention discloses an indoor light path test system which comprises a laser generator, a condenser lens to be tested, a condenser lens bracket and a receiver, wherein the laser generator is used for shooting laser beams; the condenser lens bracket is used for mounting and fixing the condenser lens to be tested and is arranged below the laser generator; and the receiver is used as a screen of a focal spot formed by the reflected light of the condenser lens bracket and is arranged between the condenser lens bracket and the laser generator. The invention further discloses a method for testing a light path and a method for testing the energy flux density of the focal spot.

The invention relates to a method for assembling a tower by post-assembly rocker arm holding pole technology. The method comprises the following steps that: firstly, a main holding pole serving as aninner suspended outer-guy holding pole slice hoists each segment of a tower body; a rocker-arm seat section is arranged above the main holding pole in advance; and after the tower body is hoisted, twosubsidiary rocker arms with preset lengths are symmetrically arranged on the tower body, and are arranged only in an assembly mode without adjusting so as to hoist a top frame and a cross arm of an iron tower. The length and rising argument of the rocker arm are determined according to the center of gravity of a hoisted piece, which means that the length and rising argument of the rocker arm aredetermined according to in-position radius of ground supports and the cross arm; after the two rocker arms are symmetrically arranged, and when a left arm hoists the ground support and the cross arm,the left arm is anchored to a ground anchor by utilizing a right arm hoisting slip rope for balance measure; and after the left ground support and the cross arm are hoisted, the hoisting slip rope isnot removed and served as a balanced anchoring point for hoisting a right side support and the cross arm, and then the hoisting is completed in turn. The method can be widely applied to the hoisting of an extra-high voltage 1000 kV alternating current dual loop and a + / -800 kV direct-current power transmission iron tower which have heave unit weight, large in-position radius and large installationdifficulty and have complex structures, such as long cross arms, ground supports and the like.

The invention discloses an unbalance amount measuring device and a method thereof. A flat-plate-type vibrating piece is arranged in the extension part of a dynamic balance testing device, and the flat-plate-type vibrating piece only vibrates in two orthogonal directions of a plane in which the vibrating piece is arranged. Therefore, irregular tremor effects generated by driving wheels are shielded, and rotation amplitude generated by unbalance and vibration data formed due to the self-weight of a detected tire and a rotation shaft are intensively transmitted to a sensor group so as to improve the accuracy of detection data and further improve unbalance mass detection and rating dimension. The measuring device comprises the vibrating piece and the sensor group, wherein the vibrating piece is connected between a fixed seat and a shell of the rotation shaft. Two connecting ends of the vibrating piece are arrayed along the extension direction of the axial center line of the rotation shaft. The sensor group is at least provided with a horizontal sensor and a vertical sensor. The vertical sensor is arranged in parallel with the vibrating piece and the horizontal sensor is perpendicular to the plane in which the vibrating piece is arranged.

The present invention discloses rotary separating and planting mechanism with nonknuckle gear for walking rice seedling transplanter. The central chain wheel inside the chain wheel box rotates the right and the left gear boxes separately on two ends of the central shaft, and two fixed central eccentric gears in the gear boxes drives the planetary nonknuckle gear on the planetary shaft via the meshing intermediate nonknuckle gears to rotate unevenly relatively to the gear boxes. The planting arm fixed to the end of the planetary shaft stretching beyond the gear box performs a resultant motion. The planetary gear train of the said mechanism features that the cross section centers of the central shaft, the intermediate shaft and the planetary shaft form one acute triangle. The present invention can ensure high rice seedling transplanting quality.

The invention relates to the technical field of building construction, and discloses a water tank preloading technology of a huge open-frame girder steel tube full support. The water tank preloading technology includes the following operation processes of full support erection, preloading area selection, preloading load determination, water tank erection, monitoring point arrangement, monitoring instrument setting, water storage gradation loading, preloading monitoring, settlement stabilization, drainage and unloading, support template adjustment and next procedure executing. By using simple equipment which is always available at the site and self-configuring a water tank, the flexibility, simpleness and convenience are achieved, the working efficiency is high, and compared with a traditional preloading method, the construction period can be shortened by 1 / 3 or above; and the processing cost is low, operation is easy and convenient, the cost is saved, compared with adopting a precast reinforced concrete block preloading method, the investment can be saved by 70-80%, compared with sandbag stacking preloading, the investment is saved by 30-40%, and compared with site reinforced material preloading, the investment can be saved by 20-30%, and the preloading method has the advantages of less construction equipment, high construction efficiency, local material using, easy manufacturing, environment-friendly construction, reasonable actual stress state in the simulated pouring process, and the like.

The present invention discloses rotary separating and planting mechanism with knuckle gear-nonknuckle gear for walking rice seedling transplanter. The central chain wheel inside the chain wheel box rotates the right and the left gear boxes separately on two ends of the central shaft, and two fixed central eccentric gears in the gear boxes drives the planetary eccentric gear on the planetary shaft via the meshing intermediate nonknuckle gears to rotate unevenly relatively to the gear boxes. The planting arm fixed to the end of the planetary shaft stretching beyond the gear box performs a resultant motion. The planetary gear train of the said mechanism features that the cross section centers of the central shaft, the intermediate shaft and the planetary shaft form one triangle. The present invention can ensure high rice seedling transplanting quality.

The invention discloses a vibration reduction and deformation self-regulation composite track structure for a high railway bridge transition section in an alpine region, and belongs to the technical field of road bridge engineering. A track is connected with a track plate, a concrete bottom plate is arranged at the lower end of the track plate, a track plate groove is formed in the lower surface of the track plate, the top face of the track plate groove is an arc face and is provided with an in-plate anti-vibration pad, a force transmission plate groove corresponding to the track plate groove is formed in the upper surface of the concrete bottom plate, a jacking mechanism groove is formed in the bottom face of the force transmission plate groove, a vibration reduction mechanism is arranged between the track plate and the concrete bottom plate, the upper end of the vibration reduction mechanism makes contact with the in-plate anti-vibration pad, the lower end of the vibration reduction mechanism is connected with a hydraulic automatic jacking mechanism, and the hydraulic automatic jacking mechanism is arranged in the jacking mechanism groove. According to the invention, the smoothness of the track structure is ensured, the structural vibration and environmental noise of the transition section are reduced, the safety and comfort of a train running to the transition section are improved, and a method for adjusting the smoothness of the track is simple, high in adaptability, large in adjusting range and convenient to apply and popularize.

The present invention discloses rotary separating and planting mechanism with offset elliptic gear for walking rice seedling transplanter. The central chain wheel inside the chain wheel box rotates the right and the left gear boxes separately on two ends of the central shaft, and two fixed central elliptic gears in the gear boxes drives the planetary elliptic gear on the planetary shaft via the intermediate elliptic gear. The planting arm fixed to the end of the planetary shaft stretching beyond the gear box performs a resultant motion. The planetary gear train of the said mechanism features that the cross section centers of the central shaft, the intermediate shaft and the planetary shaft form one triangle. The present invention can ensure high rice seedling transplanting quality.

The invention relates to the technical field of bridge construction and specifically relates to a method for first-beam-later-pier construction of a pier top section of a cable-stayed bridge auxiliary pier. The auxiliary pier body is constructed for twice; the auxiliary pier body section is constructed at the first time; front pivot travelling basket waking space is preserved; and when a beam body on the auxiliary pier body section is poured, and the front pivot travelling basket passes the space on the auxiliary pier, the auxiliary pier top section will be constructed for the second time. The second construction of the auxiliary pier top section is characterized in that after the pier top section construction, the beam body on the pier top section will be anchored and locked on the pier top section; then, a pier top support is installed between the pier top section and the beam body; and after side-span folding, anchoring and locking of the beam body by the pier top section will be released. According to the invention, a support is installed easily with high installation efficiency; the elevation of the support can be adjusted accurately according to anchoring and locking relations, so that accuracy of support installation is increased; damage of pier body concrete is avoided; and stability of the whole bridge structure is enhanced.

The invention relates to continuous extruding and cladding equipment. A continuous extruder with a supporting roll is characterized in that a stander is provided with an extruding roll and a die cavity, the stander is provided with a chute, the extruding roll and the supporting roll are arranged in the chute, a load is applied to the extruding roll, the supporting roll is arranged in the direction opposite to the load and supported on the surface of the extruding roll, and the extruding roll and the supporting roll are in compact contact. In the continuous extruder with the supporting roll, the radial load of the extruding roll can be borne by the supporting roll, so the diameter of the extruding roll is much smaller compared with that of the conventional extruding wheel, the extruding roll is much longer, the axis of the extruding wheel is simplified, and the operation of the equipment and the running safety are greatly improved. The extruding roll belongs to an easily-damaged part of tools; and because of great reduction of the size, the using cost is correspondingly reduced.

The invention provides a knob device. The knob device comprises a knob, a wheel bin, a line wheel, a base and a shoelace, wherein the base is sewn on the side surface of an upper or a tongue; a buttonposition is arranged on the inner circumferential edge of the knob; a plurality of square holes are formed in the circumferential edge of the wheel bin; a plurality of rope penetrating holes I are formed in the lower part of the outer circle of the wheel bin; a line groove is formed in the middle of the line wheel; a plurality of rope penetrating holes are formed in the line wheel; a counter borestructure is arranged in the center of the bottom of the line wheel; the knob device further comprises a gear ring; clamping teeth capable of preventing the gear ring from rotating are arranged on the gear ring; and a blocking mechanism corresponding to the clamping teeth arranged on the gear ring is arranged on the wheel bin. The knob device is better in reliability; when a pawl arm on the wheelbin is stressed reversely, the pawl arm deforms towards the centrifugal direction, pawl teeth and ratchets on the pawl arm are tightly attached together, circumferential teeth and ratchet teeth on the pawl arm are tightly attached together, and the stress states of the pawl arm, the ratchets, the circumferential teeth and the ratchet teeth are very ideal, so that the structure is higher in reliability when stressed reversely.

The lifting mechanism for circular chain code calibrating apparatus used in the calibration of electronic belt weigher includes frame beam, lifting bogie, circular chain code and driving lever. The lifting bogie and the driving lever are located on inner side the circular chain code; the lifting bogie has triangular frame; the frame beam has one oscillating rod with fixed end hinged to the frame beam and the oscillating end hinged to one link rod as well as chain code guide wheels set on two ends. The lifting mechanism has small occupied space, simple structure, reasonable stress and low cost.

The invention provides a real-time variable-pitch wind wheel which comprises a wind wheel bracket, wind propellers and wind propeller rotating shafts. At least three wind propellers are arranged on the wind wheel bracket circumferentially. Each wind propeller is rotationally connected with the wind wheel bracket through the corresponding wind propeller rotating shaft. The real-time variable-pitchwind wheel further comprises a driving device which drives the wind propellers to rotate by driving the wind propeller rotating shafts, a sensing device which is used for sensing the wind environmentand the rotation condition of the real-time variable-pitch wind wheel, and a controller which is electrically connected with the sensing device and the driving device. The controller controls the driving device to operate according to parameters detected by the sensing device. The windward area of the wind propeller on the windward semi-circumference is larger than the headwind area of the wind propeller on the headwind semi-circumference through driving of the driving device. The invention also provides a vertical-axis wind turbine. The real-time variable-pitch wind wheel and the vertical-axis wind turbine have relatively high wind energy utilization rate and conversion rate, and the stress conditions of components of the wind propellers and the wind wheel bracket, which are split, are more reasonable.

The invention discloses a frame type isolation protection system and a construction method thereof. The frame type isolation protection system comprises two rows of precast piles, and the two rows of precast piles are vertically arranged on the two sides of an excavated tunnel respectively. Every two of the precast piles in each row are connected through a first cross support, the upper half segments of every two of the precast piles in each column are connected through a second cross support, every two of the precast piles in each column are connected through a tensioning mechanism, and the lower half segments of every two of the precast piles in each column are tensioned. The frame type isolation protection system and the construction method thereof have the beneficial effects that the isolation protection system is formed by the cross supports and the tensioning mechanisms of the precast piles in the two rows and multiple columns to replace a traditional box culvert, the structure is simple, and construction efficiency is high; the stress states of all the parts are reasonable, and disturbance to surrounding buildings is small; and every two precast files are connected through a steel wire rope in the corresponding tensioning mechanism, the position of the steel wire rope between every two precast files is grouted, and soil cross beams are formed at intervals to support the isolation protection system.

The invention discloses a cutting tool with preloaded springs and an assembling method thereof. The cutting tool comprises a tool body, wherein tool grooves are formed in the tool body, threaded through holes are formed between the outer edge of the tool body and the tool grooves, locking screws are arranged in the threaded through holes, pressing blocks are arranged between the locking screws and blades, a spring groove is formed in the inner side face of each pressing block, the preloaded springs are arranged in the spring grooves, the preloaded springs are each provided with a pressure applying portion which makes contact with the pressed face of a blade in the inserting and withdrawing directions in a smooth transition mode, and in a preloaded state, the pressure applying portions of the preloaded springs are higher than the inner side faces of the pressing blocks and are in contact with the pressed surface of the blade. According to the cutting tool, when the tool is assembled, the blade can enter a preloaded state after being inserted into the tool grooves, the blade can be continuously and smoothly inserted into and withdrawn from the tool grooves, adjustment is easy, the number of parts is small, and it can be guaranteed that the blade is in a reasonable stress state.

A method of forming a thin-wall blank step by step with multi-rod force application relates to a method of forming a thin-wall blank step by step, and solves the problem that the existing forming method and device cannot effectively control each part when a large-size thin-wall blank is formed, so that the local deformation, thinning or corrugation is caused during formation. The method comprises main steps: step one, the to-be-formed blank which is cut is placed on a forming mold, and the blank is positioned and fixed; step two, a force application platform moves to the forming mold under the effect of a press machine; step three, forming heads which are respectively connected with a plurality of force application rods are in sliding contact with the blank, and the forming heads which are connected with the force application rods generate force which acts on the blank, so that the blank deforms; step four, the force application platform continues approaching the forming mold under the effect of the press machine; and step five, after formation ends, the force application platform is removed, and the formed blank is taken down from the forming mold. The invention is used for the formation of the thin-wall blank.

The invention provides a numerical control production line of U-rib components for bridge beams. The numerical control production line comprises a feeding conveying device, centering and locating devices, groove cutting guns, pre-heating devices, multi-pass rolling roller units and a discharging conveying device. The multiple centering and locating devices are installed on a rack. Each centering and locating device is formed by a forward and backward screw rod driven by a locating motor and multiple sliding block bases moving on the forward and backward screw rod symmetrically. The groove cutting guns are installed on the centering and locating devices on the feeding conveying device in a pairing manner. Multiple pairs of vertical locating clamping rollers are installed on the respective centering and locating devices. The multi-pass rolling roller units are installed on the rear of the feeding conveying device. The rolling roller unit of each pass is provided with an upper rolling roller and a lower rolling roller. Trapezoidal gaps for workpieces to pass are formed between the upper rolling rollers and the lower rolling rollers. The trapezoidal gaps of the rolling roller units aresequentially closed up along with the advancing direction of the workpieces. The preheating devices are arranged before the rolling roller units. According to the production line, the groove and surface clearing technology and the bent angle bending technology for the U-rib components are combined together for automatic production, the cost is low, the efficiency is high and the quality is excellent.

The invention discloses a tray type retaining wall structure for weakening mutual influence of subgrade. The tray type retaining wall comprises a subgrade ballast bed, an existing subgrade body, an existing bottom foundation of subgrade and an existing subgrade slope, wherein a bottom plate is arranged on the bottom surface in the length direction of one side of the existing subgrade slope and a plurality of pile foundations are evenly arranged in the length direction of the lower end of the bottom plate at intervals. The retaining wall is formed by the vertical overlapping and fixed connection between a longitudinal baffle and one end of a horizontal baffle, and the other end of the horizontal baffle and the existing subgrade slope are overlapped. One side, away from the horizontal baffle, of the longitudinal baffle is provided with a newly-built subgrade body, the upper end of the horizontal baffle is provided with a leveling layer between lines, and the left and right sides of the leveling layer between lines are respectively consistent with the newly-built subgrade ballast bed and the existing subgrade ballast bed at the upper ends of the newly-built subgrade body and the existing subgrade body. The tray type retaining wall structure for weakening the mutual influence of the subgrade is high in bearing capacity, higher in earth retaining, broad in application range, convenient to construct, long in service life and better in economic and social benefit.

The invention discloses a rubber shock absorber mainly comprising a metal mounting seat, a stiffening ring, a locating shaft and rubber supports, wherein the rubber supports are made of vulcanized rubber and are respectively arranged between the locating shaft and the stiffening ring and between the stiffening ring and the mounting seat; the three parts, namely the metal mounting seat, the stiffening ring and the locating shaft are all metal parts, the surfaces, which are in contact with rubber, of the three parts are all vulcanized, and the three parts are combined into a whole through the rubber; the mounting seat, the stiffening ring and the locating shaft are not in contact with one another, so that the locating shaft can be elastically connected with the mounting seat; an unthreaded hole or a threaded hole is formed in the center of the locating shaft; and the metal mounting seat and the locating shaft are both designed at a certain angle, and the connecting boundaries of the rubber and metal are in circular arc transition, so that stress concentration caused when the shock absorber works can be reduced. When the rubber shock absorber is fixed through the locating shaft and the mounting seat when being mounted, the formula of a rubber material is optimized, and the effects of shock absorption and noise reduction are effectively taken; and the structure and the stress state are reasonable, the durability of the rubber shock absorber is improved, the service life of the rubber shock absorber is prolonged, and the rubber shock absorber has a relatively high application value.

The invention discloses a big-plate-assembled building structure which comprises an exterior wall, an interior wall, a main load-bearing plate, a secondary load-bearing plate and a floor plate roof plate. Each of the interior wall and the exterior wall comprises a left frame, a right frame, an upper frame, a lower frame, a diagonal support, a wall material, tie bars, a door-window opening frame and reinforcing bars, the floor plate roof plate comprises a wall material, tie bars and a floor plate roof plate load-bearing frame, a main #-shaped frame, a secondary #-shaped frame and a floor plate roof plate frame, and the floor plate roof plate frame is mounted on two sides of the main #-shaped frame. By the big-plate-assembled building structure, using performance of materials is improved greatly, stressed state is more reasonable, effects of reducing raw material consumption, greatly reducing manpower resource consumption and saving building cost are realized, construction period is shortened greatly, anti-seismic performance is improved, deal load of buildings is reduced, fireproof and flame-retardant requirements are guaranteed, living environment is improved, energy conservation and environment protection are realized, and a major contribution is made to building industrialization.