40results about How to "Reduce external stress" patented technology

A sighting assembly for a firearm includes a scope and a mounting clamp. The mounting clamp includes a ring cap and a ring base that cooperate to surround and hold the scope. The mounting clamp has a rail clamp that includes a plurality of crowned portions that are configured to physically contact and grip a mounting rail.

The invention relates to the technical field related to new energy, and discloses a new energy power generation equipment fitting transportation device. The new energy power generation equipment fitting transportation device comprises a box body, a box cover, fourteen vertical separation plates, twenty-six airbag layers, multiple airbag projections, a transverse mounting groove, a transverse multi-way pipe, an air guide joint, an embedding groove, a switch valve, twenty-six vertical guide grooves, twenty-six vertical air guide pipes, a mounting plate, a guide groove, two guide chutes, twenty-six mounting slide plates, fifty-two movable rollers, twenty-six lateral extension rubber layers, thirteen transverse extension rubber layers, thirteen sets of arc springs, a polish rod, an inner bearing, a starlike handle, two limiting blocks and thirteen thread set mechanisms; the box cover is positioned above the box body; and the fourteen vertical separation plates are distributed between the front and back side inner walls of the box body at equal intervals. The new energy power generation equipment fitting transportation device realizes multiple times of counteraction and buffering of stress transferred by photovoltaic panels, effectively protects the bottoms of the photovoltaic panels, and improves the applicability.

Disclosed is a deformation-prevention heat treatment method for a large thin-wall steel casting. The method comprises the steps of arranging a lifting and transporting tray, arranging a steel casting supporting pad, arranging external connection temperature measuring devices, and carrying out heat treatment and quenching. In the step of arranging the external connection temperature measuring devices, the three external connection temperature measuring devices are arranged at the thickest wall, the thinnest wall and the middle portion of the steel casting and are used for monitoring the temperature of the thickest wall, the thinnest wall and the middle portion of the steel casting; and through arrangement of the lifting and transporting tray and deformation-prevention tie bars, the heat treatment temperature is precisely controlled, quenching media are changed to reduce external stress, heat stress and structural stress borne by the steel casting, and finally, it is ensured that after heat treatment and quenching of the steel casting, the casting does not deform.

The invention provides a box body, a guide carrier for guiding the position of the box body and a position guiding method.The box body comprises four outer side walls and four inner side walls.The inner side walls are adjacent to each other to define an accommodation space for accommodating at least one substrate.The extending direction of each of the outer side walls is at an angle with the extending direction of the corresponding inner side wall.The position guiding carrier comprises a support base and a rotary platform.The support base is equipped with a pre-set reference face.The box body can be rotated from a first position on the rotary platform to a second position, so that the inner side walls of the box body are parallel to the pre-set reference face.

The invention discloses a bending structure, a display device and a bending jig. The bending structure comprises a first rotatable supporting plate and a second rotatable supporting plate, wherein thefirst rotatable supporting plate and the second rotatable supporting plate are rotationally connected, and the relative rotation angle between the first rotatable supporting plate and the second rotatable supporting plate is larger than or equal to 0 degree and smaller than or equal to 360 degrees; the spacing area is located between the first rotatable supporting plate and the second rotatable supporting plate; the first rotatable supporting plate is used for supporting a first non-bending area of a to-be-bent part, the second rotatable supporting plate is used for supporting a second non-bending area of the to-be-bent part, and in the flattening state, the projection of the bending area of the to-be-bent part on the bending structure covers the interval area; wherein the bending area ofthe part to be bent is located between the first non-bending area and the second non-bending area. According to the bending structure, the thickness of the bent structure in the infolding limit stateis reduced.

The invention relates to the technical field of electronic equipment, and discloses a welding device and welding method for a printed board assembly based on inter-board vertical interconnection. The welding device comprises a positioning plate, a supporting plate, pins and screws, wherein the positioning plate is arranged above a printed board, the supporting plate is arranged below the printed board, the positioning plate, the supporting plate and the printed board are positioned through the pins, and the positioning plate, the supporting plate and the printed board are fixed together through the screws. According to the welding device and welding method, the welding device is adopted to mount and position a surface-mounted connector on the printed board assembly, the buckling deformation of the printed board in the welding process is controlled, accurate positioning and reliable welding of the surface-mounted connector based on inter-board vertical interconnection are realized, the problems of the position offset of the surface-mounted connector on the printed board assembly, the inclination and flotation of the connector and the buckling deformation of the printed board can be solved, and therefore the realizability and reliability of inter-board vertical interconnection are improved.

The invention belongs to the technical field of quantum dots, and particularly relates to a quantum dot transfer printing method. The quantum dot transfer printing method comprises the following stepsthat a seal is provided, a deformation embedded body is arranged on a seal surface protruding part of the seal, and the deformation embedded body is obtained in the mode that an initial embedded bodymanufactured by materials containing shape memory polymers are deformed; a quantum dot initial film arranged on the surface of a donor substrate is provided, and the initial film is subjected to transfer printing onto the seal surface, provided with the deformation embedded body, of the seal to form a quantum dot patterned film layer; the seal with the quantum dot pattern film layer subjected totransfer printing makes contact with a target substrate, the deformation embedded body is restored to the initial embedded body, and thus the quantum dot pattern film layer is subjected to transfer printing onto the target substrate. According to the quantum dot transfer printing method, part of pattern residues finally caused by nonuniform stress restoring is reduced, the integrity of transfer printing of the quantum dot pattern film layer is improved, and externally-applied stress required by repeated using of the seal is reduced.

The invention discloses a probe package structure of a human body pressure measuring sensor. The probe package structure comprises a wire, a protection tube, a micro PCB (printed circuit board), a pressure chip and a transition wire, wherein the wire is powered on by the pressure chip and is used for signal transmission; the protection tube is provided with a groove, one end of the protection tube is in sealing communication with a plastic conduit, and the other end is a closed end; the micro PCB is placed in the groove, and a signal output end of the micro PCB is connected with the wire; the pressure chip is placed in the groove, and a sensing surface of the pressure chip is perpendicular to the opening direction of the groove; the transition wire is connected with the pressure chip and the micro PCB; a gap between the pressure chip and the protection tube is filled with protective glue; the surface of the pressure chip is filled with the protective glue; and a low stress medium is filled between the pressure chip and the micro PCB. The chip in the invention is minimally subjected to external stress, thereby ensuring minimum fluctuation of the output value of a packaged sensor and minimum time drift, avoiding the risk of short circuit, improving the stability of test value of the pressure chip, and thus effectively improving the accuracy of pressure monitoring.

The invention relates to the field of bridge tower construction, and discloses an inclined strut device for bridge tower column construction and a mounting structure. The device is characterized in that the the inclined strut device is manufactured, bridge tower columns are constructed step by step, the inclined strut device is mounted between the two tower columns in the construction process, and finally tension force is applied to the inclined strut device, so that the two tower columns are supported in the transverse bridge direction. A plurality of triangular cone inclined struts are adopted, and downward vertical force is applied to the top end of the inclined strut device, so that a plurality of horizontal thrusts in the transverse bridge direction are decomposed to act on the bridge tower columns, and tension strain generated by self weight and construction load on the outer sides of the bottoms of the bridge tower columns and the outer sides of the bridge tower columns at the first inclined strut is reduced. The method for applying the vertical force by the inclined strut device is simple, the internal force is adjustable, and the efficiency is high; under the requirement of the same supporting effect, the inclined strut device can remarkably reduce the number of temporary horizontal cross braces, compared with a traditional multi-channel horizontal cross brace, the cross section of a inclined strut component has the advantages of being small in cross section, light in weight, convenient and fast to construct and the like, and the inclined strut device has remarkable engineering significance and economic and social benefits.

The invention provides a concrete face rockfill dam isolating layer construction method. The concrete face rockfill dam isolating layer construction method comprises the following steps of: (1) preparing powder-emulsified asphalt mortar on the scene; (2) filtering the powder-emulsified asphalt mortar to remove glue residues for later application, continuously stirring, and storing for 1.5 hours after stirring; and (3) conveying the powder-emulsified asphalt mortar to a working face through a conveying hose, spraying the powder-emulsified asphalt mortar onto a protective surface through a spraygun at the working pressure of 0.8-1.2MPa to form a semi-rigid isolating layer, and separating the protective surface from a concrete face by the semi-rigid isolating layer which has the effects of lubrication and seepage control. The face rockfill dam upstream protective surface isolating layer construction method is simplified; and the concrete face rockfill dam isolating layer construction method improves the gluing quality of the isolating layer and the protective surface, has a good effect of separating different layers and reduces the restraint stress of the face and the generation of concrete face cracks.

The invention belongs to the field of bridge tower construction and discloses a construction method of a temporary single diagonal bracing bridge tower. The construction method comprises the following steps of: manufacturing a diagonal bracing device; gradually constructing a bridge tower; installing the diagonal bracing device between two tower columns in the construction process; and applying tension force to the diagonal bracing device so as to support the two tower columns in the transverse bridge direction. A traditional horizontal support construction method is improved; a triangular cone diagonal bracing mode is adopted, and the principle is that downward vertical force is applied to the top end of the diagonal bracing device, so that horizontal thrust in the transverse bridge direction is decomposed to act on the tower columns, and the outer side tensile strain of the bottoms of the tower columns of the bridge tower generated by self weight and construction loads is reduced. The method for applying the vertical force by a temporary device is simple, the internal force is adjustable, and the efficiency is high; under the requirement of the same supporting effect, the single temporary diagonal bracing can remarkably replace multiple groups of horizontal cross struts; the diagonal bracing is simple in structure;the diagonal bracing component is smaller in cross section than that of a traditional horizontal cross strut,lighter in weight and is convenient and fast in construction and has remarkable engineering significance and economic and social benefits.

The invention relates to a high temperature resistant flame retardant power cable, comprising a cable core, a total wrapping layer, an outer refractory material layer, an armor layer and an outer sheath; the cable core includes a flame retardant sleeve and four wires; the flame retardant sleeve It includes four flame retardant parts, which are connected end to end in sequence, and an outer elastic part is arranged between any two adjacent flame retardant parts, and the outer elastic part has an outer arc surface and two inner arc surfaces , the outer arc surfaces of the outer elastic parts cooperate with each other so that the cable core has a circular cross-section, and the inner arc surfaces of the outer elastic parts respectively abut against the outer arc surfaces of the two flame retardant parts; the wires abut against the On the inner arc surface of the flame retardant, the central connection line of the four wires is a square, and an inner elastic piece is arranged between the four wires, and the inner elastic piece is circumscribed with the wire, and there is an inner elastic piece between the four wires and the inner elastic piece. Tensile core, the tensile core is wrapped around the inner elastic. The invention has excellent high temperature resistance and flame retardancy, large carrying capacity and high safety.

The invention discloses a method for reducing grooves during bottoming of an aluminum alloy sleeve. The method has the following advantages: (1) the pressure of an expansion shaft is matched with the tensile strength of the aluminum alloy sleeve, on one hand, slipping between the expansion shaft and the aluminum alloy sleeve can be avoided, and on the other hand, the external pressure of the pressure of the expansion shaft on the aluminum alloy sleeve can be reduced; and (2) the starting pressure intensity is adjusted, so that the stress release on the aluminum alloy sleeve can be effectively buffered, and the phenomenon that grooves are formed in the surface of the aluminum alloy sleeve due to the fact that the stress release rate is too high is avoided.