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

A process for producing a film forming composition, the process including hydrolyzing and condensing: (A) at least one silane compound selected from a compound (A-1) shown by the following general formula (1), a compound (A-2) shown by the following general formula (2), and a compound (A-3) shown by the following general formula (3),RaSi(OR1)4-a  (1)Si(OR2)4  (2)R3b(R4O)3-bSi—(R7)d—Si(OR5)3-cR6c  (3); and(B) a cyclic silane compound shown by the following general formula (4):

The invention relates to a weather-proof isolation transformer with a metal full filling and sealing structure. The isolation transformer comprises a metal shell, a transformer coil, a bottom plate, a glue filling wall and an extraction rod. The extraction rod penetrates through the bottom plate to be fixed onto the bottom plate, one end of the extraction rod is connected with the transformer coil, the other end of the extraction rod is connected with an external device, the glue filling wall is fixedly connected to the edge of the bottom plate to form a filling and sealing space on the bottom plate, the filling and sealing space is filled with filling and sealing glue to fix the transformer coil, an opening at one end of the metal shell is sleeved on the glue filling wall, and an opening end of the metal shell is fixedly connected with the bottom plate to achieve a function of integral sealing. The isolation transformer has the advantages of high mechanical strength, more outstanding weatherproof performance, longer storage and service life, more excellent space adaptability and high electromagnetic compatibility.

A cartridge for an IOL delivery system that has an injector tip geometry designed to reduce stresses at the incision wound edges generated during insertion of an IOL into an eye is disclosed. The injector tip geometry includes a tubular nozzle having a modified elliptical cross section. The injector tip geometry reduces stresses generated reduce the likelihood of tearing or overstretching the wound during cartridge tip insertion and residence time in the wound while the lens is being delivered into the eye.

A bone adjustment device such as, for example, an intramedullary lengthening nail may include a first or outer body portion having a notch, a second or inner body portion, a threaded shaft coupled to the first body portion to rotate relative thereto, an inner magnet received by the first body portion and coupled to the threaded shaft for rotation therewith, and a threaded block positioned in the notch, the threaded block having internal threads, the threaded shaft passing through the threaded block and threadedly engaging with the internal threads. Various reconfiguration assembly embodiments include welding the threaded block to the first body portion, the notch being located a distance from the distal end of the first body portion, an overlapping arrangement between the first body portion and the second body portion, and a collar positioned over the first body portion.

The invention relates to the field of bridge tower construction, and discloses a diagonal brace device and an installation structure for bridge tower column construction, including making the diagonal brace device, gradually constructing the bridge tower column and installing the diagonal brace device on two bridges during the construction process. Between the pylons, tension is finally applied to the diagonal bracing device so that the cross bridge supports the two pylons. The present invention adopts the form of multiple triangular pyramid diagonal braces, and applies downward vertical force on the top of the diagonal braces, so as to decompose the horizontal thrust of multiple transverse bridges and act on the bridge tower column, thereby reducing the self-weight and construction load. Tensile strain on the outer side of the bottom of the bridge tower column and the outer side of the bridge tower column at the first diagonal brace. The method of applying vertical force by the diagonal bracing device is relatively simple, the internal force is adjustable and the efficiency is high; under the same support effect requirements, the diagonal bracing device can significantly reduce the number of temporary horizontal braces, and the cross section of the diagonal bracing member is more horizontal than the traditional multi-layer The cross brace has the advantages of small cross-section, light weight, and convenient construction, and has significant engineering significance and economic and social benefits.

The invention relates to the field of electronic equipment, and discloses a blind insertion structure for vertical interconnection between boards and a realization method thereof. The structure includes: a first mounting board, a backing board, a printed board assembly, a pressing board, and a second mounting board; The mounting plate has a cavity, and the SMPM‑M connector is installed at the bottom of the cavity, and the backing plate, printed board assembly, and pressure plate are assembled in the cavity in sequence; the front and back of the printed board assembly are equipped with surface mount connectors; And the SMT connectors on both sides of the front and back are crimped with KK heads; the position of the backing plate corresponding to the SMT connector on the front of the printed board assembly is provided with a stepped structural through hole; the pressure plate corresponds to the surface mount connection on the back of the printed board assembly The position of the connector is provided with a stepped structure through hole; the second mounting plate is equipped with a JSSMP radio frequency coaxial connector, and the second mounting plate is assembled on the first mounting plate. The blind mating structure can realize fast, reliable and high-precision vertical interconnection between boards.

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 discloses a ship thick-plate welding technology. The ship thick-plate welding technology comprises the following steps that flat welding and balanced welding are adopted for ship thick plates; welding is conducted on a small part of the inner sides of the ship thick plates, and then balanced welding is conducted on the outer sides of the ship thick plates; welding is conducted on one part of the inner sides of the ship thick plates again, and carbon arc air gouging is conducted on the outer sides of the ship thick plates, wherein carbon arc air gouging is used for back chipping and beveling, and each air-gouged bevel needs to range from 50 degrees to 60 degrees; balanced welding is conducted on the outer sides of the ship thick plates and the inner sides of the ship thick plates after the outer sides of the ship thick plates are subjected to carbon arc air gouging, preheating is conducted firstly, the first layer is filled with metal, welding feet need to be small, and short-arc welding is adopted; temperature is measured through a point temperature gun before second welding is conducted; the inner sides of the ship thick plates are completely welded, wherein when the inner side is welded with one layer, the symmetrical outer side also needs to be welded with one layer, and the interlayer temperature is smaller than 100 DEG C or smaller than 250 DEG C; and the outer sides are completely welded, wherein after the last part of each inner side is completely welded, the corresponding outer side also needs to be completely welded, and the temperature is kept between 300 DEG C and 400 DEG C. Flat welding is adopted by the ship thick plates, the operation difficulty of flat welding positions is small for a welder, outer side stress can be better reduced by means of steel plate preheating and double-face balanced welding, and therefore the crack defect is effectively avoided.