51results about How to "Stress structure is stable" patented technology

The invention relates to a construction method of a large-span thin wall planar arch truss based on a stiffened ring beam. The construction method comprises the steps: constructing an annularly closed ring beam foundation at the top of a main body structure; mounting a support seat on the ring beam foundation; arranging a support system at the top of the main body structure; arranging a single arch truss with an irregularly shape in the local area subsidence; forming multi-section truss units by segmenting the single arch truss; mounting the truss units two-symmetrically from bottom to top; connecting the adjacent two single arch trusses together through a connecting rod to form a roof cover structure; unloading the support system. By adopting the way of two- two symmetrically installation, the load of the installed truss unit on the support system is balanced; the truss unit is connected into a whole by the connecting rod to form a stable whole force structure, thus the problems of the unevenness of the force of the arch truss with the irregularly shape and concentrated stress are avoided.

The invention relates to the technical field of a mechanical shovel-like excavator which is special equipment for mining a large-scale open-pit mine, and particularly relates to a working arm frame ofan excavator and the excavator. The working arm frame comprises a lower arm frame, a support rod, an upper arm frame and a top pulley, wherein the lower end of the lower arm frame is hinged to a working platform, the upper end of the lower arm frame is hinged to one end of the support rod, the other end of the support rod is hinged to the top of an A-shaped frame, the lower arm frame, the supportrod and the A-shaped frame form a triangular support structure, the lower end of the upper arm frame is hinged to the upper end of the lower arm frame, the top pulley is arranged on the upper end ofthe upper arm frame, the upper end of the upper arm frame is connected with the top of the A-shaped frame by virtue of a pull rope, and a bucket rod and a pushing device are arranged on the lower armframe. According to the structure, the stressed structure of the working arm frame is optimized, the bending moment of the lower arm frame in the pushing process of the bucket rod is reduced, and theworking performance of the whole machine is improved; the support rod is additionally arranged on the arm frame, so that the possibility that the machine is damaged by the jacking of the working arm frame when a bucket is gnawing at the bottom is avoided.

The invention belongs to the field of tunnel engineering, and particularly relates to a construction method for rapid expanding excavation conversion during a sudden change of a large-span section of a tunnel section. The method includes the steps that when the tunnel section enters into a transition section of the abrupt change large-span section, a longitudinal advance pilot tunnel and a longitudinal follow-up pilot tunnel are excavated in sequence, and expanding excavation is conducted towards the arch part of the abrupt change large-span section while the follow-up pilot tunnel is excavated; then 90-degree straight turning expanding excavation is conducted in the direction of a side wall, reserved steps are excavated, an arch frame is annularly lengthened within a longitudinal length range, and arch feet are erected on the reserved steps of a longitudinal side wall; and then a reserved step is excavated in the longitudinal direction of a main tunnel, and primary support of the upper middle portion of the transition section is safely and rapidly completed. Therefore, construction safety is guaranteed, meanwhile, operation space is provided for follow-up large-span section right side upper pilot tunnel construction, and the defects that when a variable section construction method is converted, equipment is difficult to unfold, the construction speed is low, and the safety risk is high are overcome.

The invention discloses a high-strength multilayer plate which comprises a first solid board, a second solid board and a solid particle board, wherein a fiber plate is arranged between the first solid board and the solid particle board; the first solid board and the solid particle board are both adhered to the fiber plate; a stainless steel net is arranged on a surface of the fiber plate and is embedded into the solid particle board; a bamboo plate is arranged between the second solid board and the solid particle board; the second solid board and the solid particle board are both adhered to the bamboo plate; battens are arranged on the bamboo plate; the battens and the bamboo plate are integrally arranged; the battens are embedded into the solid particle board and are distributed in a form of Chinese character Tian; carbon fiber rods are arranged in the battens. The high-strength multilayer plate is high in mechanical strength.

The invention provides a single stand column flower-shaped tower and a construction method thereof. The lower-shaped tower comprises a tower body, a tower crown connected to the top of the tower body and an overhauling structure connected to the tower crown. The tower crown comprises a first truss disc, a second truss disc and a third truss disc which are connected with the tower body in a sleeving mode. The first truss disc, the second truss disc and the third truss disc are sequentially arranged in a horizontal and spaced mode from bottom to top. A set of first rigid supports are connected in a radial and annular mode in the direction from the first truss disc to the second truss disc, a first inhaul cable is connected between opposite angles of every two adjacent first rigid supports in a shear-fork shape, and a set of second rigid supports are annularly arranged in a vertical plane between the second truss disc and the third truss disc; and a second inhaul cable is connected between opposite angles of every two adjacent second rigid supports in the shear-fork shape. The single stand column flower-shaped tower is simple and stable in structure, the single stand column top truss stress puzzle is greatly solved, and overall stability is achieved; and construction of the single stand column flower-shaped tower is more convenient and faster, and the entirety has more plasticity while it is guaranteed that a tower crown structure is stable in stress.

The invention discloses an independent suspension device of a non-manned trolley. The independent suspension device comprises a connecting piece (1), a fixing piece (2), an upper cantilever (3), a shock absorber (4) and a lower cantilever (5). One end of the connecting piece (1) is fixedly connected with one end of the fixing piece (2); the other end of the fixing piece (2) is connected with one end of the upper cantilever (3) through a pin shaft; the other end of the upper cantilever (3) is connected with a frame through a pin shaft; the lower end of the fixing piece (2) is connected with oneend of the lower cantilever (5) through a pin shaft, the other end of the lower cantilever (5) is connected with the frame through a pin shaft; one end of the shock absorber (4) is connected with thelower cantilever (5) through a pin shaft, and the other end of the shock absorber (4) is connected with a hub through a pin shaft. The independent suspension device is simple in structure, convenientto assemble and carry; and vehicles can be driven stably with the independent suspension.

The invention discloses an antirust installation bracket of an external unit of an air conditioner. The bracket comprises at least two vertical columns and an installation rack connected between the two vertical columns; the installation rack comprises an upper supporting beam, a lower supporting beam and an installation column, wherein the upper supporting beam is connected to the upper ends of the vertical columns, and the lower supporting beam is perpendicular to the upper supporting beam and is connected to the lower ends of the vertical columns; and an inclined conical surface with the two sides concaved inwards is arranged on the upper surface of the upper supporting beam, a blind drainage ditch is formed in the middle of the upper supporting beam, a drainage channel is formed in the lower supporting beam and communicates with an intersection point of the blind drainage ditch and the drainage channel through a drainage through-hole, a kidney-shaped groove I is formed in the end of the installation column and is connected to an installation plate through a screw, and the installation plate is provided with a kidney-shaped groove II with the same size as the kidney-shaped groove I. According to the bracket, water drainage and rust protection can be effectively realized, and the service life can be prolonged.

The invention discloses an AGV forklift three-way accessory which comprises a portal, a lifting assembly, a translation assembly, a swing assembly, a fork arm carrier and a pair of forks. The fork armcarrier is fixedly connected to the swing assembly. The swing assembly is connected to the translation assembly. The translation assembly is connected to the lifting assembly. The lifting assembly isfixed to the portal. The forks are mounted on the fork arm carrier. The lifting assembly, the translation assembly and the swing assembly are electrically connected with a PLC control system of a forklift. The forks are provided with pressure sensors and are in sliding connection to the fork arm carrier. A fork distance adjusting device is arranged on the fork arm carrier. The forks are connectedwith the fork distance adjusting device. The pressure sensors and the fork distance adjusting device are all electrically connected with the PLC control system. The invention further discloses a working method of the AGV forklift three-way accessory. By means of the AGV forklift three-way accessory and the working method, the work efficiency, stability and safety of the AGV forklift can be improved.

The invention discloses a construction method for leading out a turnout extra-large-section tunnel in a railway cave. The construction method comprises the following steps that 1, an extra-large-section cave auxiliary excavation section is constructed; 2, expanding excavation is conducted on the auxiliary excavation section; 3, grouting is conducted on a middle pipe shed; and 4, the extra-large-section cave is excavated. According to the construction method for leading out the turnout extra-large-section tunnel in the railway cave, construction is flexible and changeable, the applicability is high, and the construction speed is high; by combining the characteristic that the lithology of surrounding rock of the extra-large-section cave is good, a simple middle partition wall method and two large-diameter steel pipe temporary vertical supports are adopted on the upper half section of the extra-large-section cave, and excavation is conducted on the lower half section of the extra-large-section cave through a step method; a double-side-wall equal-large-section shallow-buried and soft rock construction method is replaced, so that a steel arch frame can be smoothly connected from the arch top to the two ends, the stress structure is stable, and enough operation space can be provided for large construction operation equipment; and the defects that according to the double-side-wall equal-large-section shallow-buried and soft rock tunnel excavation construction method, large equipment is difficult to unfold, the construction speed is low, and the safety risk is high are overcome, and the application range of the tunnel step method excavation construction method is expanded.

The invention discloses a fork lift truck attachment for steel member carrying. The fork lift truck attachment for steel member carrying comprises forks and further comprises an external hanging joist. The external hanging joist is provided with a hanging plate and adjustable check blocks, the external hanging joist is detachably connected to the forks through the hanging plate, the hanging plateis fixed to the middle of the external hanging joist, and the check blocks are symmetrically arranged at the two ends of the external hanging joist. The fork lift truck attachment for steel member carrying is specially designed for the structural characteristics of large steel frame structure members, the fork lift truck attachment can form a stable force bearing structure, balance is kept easily,and stable and quick carrying is achieved. In addition, the external hanging joist in the fork lift truck attachment can be conveniently used in combination with the forks of a common fork lift truck, the fork lift truck is made to have good universality, the common fork lift truck can smoothly implement carrying work of the large steel frame structure members, and during carrying, working difficulty can be reduced, and working efficiency is improved.

The invention discloses an antirust installation bracket of an external unit of an air conditioner. The bracket comprises at least two vertical columns and an installation rack connected between the two vertical columns; the installation rack comprises an upper supporting beam, a lower supporting beam and an installation column, wherein the upper supporting beam is connected to the upper ends of the vertical columns, and the lower supporting beam is perpendicular to the upper supporting beam and is connected to the lower ends of the vertical columns; and an inclined conical surface with the two sides concaved inwards is arranged on the upper surface of the upper supporting beam, a blind drainage ditch is formed in the middle of the upper supporting beam, a drainage channel is formed in the lower supporting beam and communicates with an intersection point of the blind drainage ditch and the drainage channel through a drainage through-hole, a kidney-shaped groove I is formed in the end of the installation column and is connected to an installation plate through a screw, and the installation plate is provided with a kidney-shaped groove II with the same size as the kidney-shaped groove I. According to the bracket, water drainage and rust protection can be effectively realized, and the service life can be prolonged.

The invention discloses a lumbar vertebrae postoperative traction device. The lumbar vertebrae postoperative traction device comprises a waist fixing belt, a chest fixing belt and a connecting rod, wherein a fixing device is arranged on each of the waist fixing belt and the chest fixing belt; a guide rail is arranged on a side face of the connecting rod; a first slider and a second slider are mounted on the guide rail; the first slider is connected with the waist fixing belt through a bolt; the second slider is connected with the chest fixing belt through a bolt; a screw rod is arranged in theguide rail; connecting sheets are arranged at two ends of the screw rod; the connecting sheets are in thread connection with the screw rod; the connecting sheets are fixedly connected with the guiderail; the screw rod is suspended in the guide rail through the connecting sheets; thread holes and perforated holes matched with the screw rod are formed in the first slider and the second slider; theperforated holes are in clearance fit with the screw rod; the screw rod penetrates through the perforated holes; the thread holes and the perforated holes are distributed in a concentric circle manner; the screw rod is provided with a screw rod sleeve. The lumbar vertebrae postoperative traction device is convenient to carry.

The invention discloses a safe type mounting support for an air conditioner outdoor unit. The safe type mounting support comprises at least two stand columns and a mounting frame connected between the two stand columns. Each stand column comprises a bottom plate and a side plate, wherein the bottom plate and the side plate are each provided with a plurality of fixing through holes. The mounting frame comprises an upper supporting beam, a lower supporting beam and a mounting column, wherein the upper supporting beam is connected to the upper ends of the stand columns, and the lower supporting beam is perpendicular to the upper supporting beam and connected to the lower ends of the stand columns; the upper surface of the upper supporting beam is a scalene cone with the two sides concaving inwards, and blind drains are formed in the middle of the upper supporting beam; the lower supporting beam is further provided with a drainage groove, and the drainage groove communicates with the intersection of the blind drains through a drainage through hole; a kidney-shaped groove is formed in one end of the mounting column, a guardrail plate is connected to the kidney-shaped groove through screws, and the guardrail plate is provided with a plurality of air conditioner outdoor unit fixing through holes. According to the safe type mounting support, drainage and rust prevention can be effectively achieved, and the service life is prolonged.

The invention relates to a mold used for plastic suction of shape memory polymers. By adoption of the mold used for plastic suction of the shape memory polymers, the defects that in the prior art, secondary modification cannot be achieved after a plastic shell is cast, and an internal complex structure and a complex variable section cannot be manufactured; the internal structure of a conventional mold is difficult to clean, the wastage and the wear corrosion rate are high, the cost is high due to the fact that reprocessing is not available, and the maintenance cost is high; by adoption of an existing blow molding or mechanical deformation way or other existing ways, the pressure is nonuniform in the mold forming process, the surface smoothness of a manufactured sample is poor, and fracture damage is likely to occur; and an existing mold is simplex in function, can only deform once and cannot deform multiple times based on the temperature gradient according to requirements of users, and the degree of controllability is low are overcome. The mold comprises an upper mold body and a lower mold body, wherein the upper mold body and the lower mold body are buckled together to form a cuboid, and a mold cavity is machined in the cuboid in the length direction. The mold is applied to the field of plastic suction of the shape memory polymers.