33results about How to "Enhanced geometric stability" patented technology

The invention relates to a gob-side entry retaining roadside support system and a construction method thereof. A rhombic steel bar net is arranged on one side of a gob, an air drum cloth is laid on the inner side of the rhombic steel bar net, light aggregate concrete is adopted to perform guniting treatment on the air drum cloth and the rhombic steel bar net, a windtight light aggregate concrete spray layer is formed on the side of the gob, the thickness of the light aggregate concrete spray layer is 200-500 mm, and the other side of the light aggregate concrete spray layer is close to a steel tube concrete pier stud supporting device. A steel tube concrete pier stud is formed by filling an empty steel tube with concrete; through a restraint effect of a steel tube casing, internal concrete is in a three-dimensional stressed state, the geometrical stability of the steel tube wall is enhanced, and the bearing capacity of the steel tube concrete pier stud is improved. According to the gob-side entry retaining roadside support system, a top plate can be supported in high strength, coal mining efficiency is effectively improved, and an operation environment in a roadway is improved; the steel tube concrete pier stud can be recycled through a special thrust device, and the roadway retained cost is reduced.

A manufacturing method of factory prefabricated steel-concrete combined pipes comprises the following steps that (1) the number and relevant sizes of multiple steel-concrete combined pipes with crosssections of rectangular structures are designed according to the requirements of a construction drawing; (2) the steel-concrete combined pipes are prefabricated in a factory in a segmented manner according to the drawing requirements; and (3) after the steel-concrete combined pipes are connected, I-shaped structures or T-shaped structures or L-shaped structures or cross-shaped structures or squarestructures are formed. In the manufacturing method, inner concrete, outer concrete, steel bar net pieces and steel plates with ribs on the inner sides form an overall steel-concrete combined shear wall through tie bars to work together, and therefore the ductility and compressive strength of the concrete are greatly improved, the practicality and toughness properties of the structure of the overall steel-concrete combined shear wall are greatly improved, and the anti-deformation capacity and compressive strength of the shear wall are greatly improved; and meanwhile, due to the fact that the steel plates with the ribs are wrapped in the concrete, the problems of fire prevention and corrosion prevention of a steel structure building are effectively solved.

The invention provides a light-emitting element, comprising: a light source body, a lead frame, an LED crystal grain, a Zener diode, a light-transmitting layer, and a photonic crystal film. The lead frame is placed at the bottom of the light source body, the LED die is placed above the lead frame, the light-transmitting layer is placed above the light source body, and at least one wire is electrically connected to the LED die and the Zener diode , The photonic crystal film is placed on the surface of the LED die and the inner surface of the light source body, and the characteristics of the photonic crystal film are used to increase the luminous efficiency.

The invention belongs to the technical field of devices combining antenna components with antennas, and discloses a novel double-layer scissor parabolic cylindrical expandable truss antenna device, which is composed of a plurality of double-layer scissor hinge mechanisms, wherein adjacent double-layer scissor hinge mechanisms are connected to each other by a double-headed hinge, a sliding hinge, athree-headed hinge and a four-headed hinge to form a closed parabolic cylinder; each double-layer scissor hinge mechanism consists of two vertical rods, two long inclined rods, two short inclined rods, four double-headed hinges, four sliding hinges, and two springs; and adjacent two double-layer scissor hinges share a vertical rod, a double-headed hinge or a three-headed hinge or a four-headed hinge, a sliding hinge, and a spring. The invention has high geometric stability, strong rigidity, simple movement mechanism and control system, small volume after closing, high storage rate, strong module expansion, as well as simple assembly, and may be respectively deployed in the axial or length direction, thereby satisfying the requirements for the use of aperture antennas.

The invention discloses a rigid-flexible combination gob-side entry retaining method and a rigid-flexible combination gob-side entry retaining device by the aid of roadside supports. The rigid-flexible combination gob-side entry retaining method includes building a layer of gangue wall by first gangue bags on a gob side of a reserved roadway to seal a gob; erecting two rows of pillars made of concrete-filled steel tubes at the edge of the reserved roadway, enabling the two rows of pillars to cling to a concrete sprayed layer, laying a steel plate on each three rows of pillars made of concrete-filled steel tubes along the axial direction of the reserved roadway, and continuously laying the steel plates to form a flexible supporting cushion; laying second gangue bags on the cushion until the laid gangue bags are in contact with a top plate to form a gangue bag layer, and performing spouting on the gangue bag layer and the cushion so as to form an integral structure comprising the second gangue bags, the cushion and the pillars made of the concrete-filled steel tubes. The rigid-flexible combination gob-side entry retaining method and the rigid-flexible combination gob-side entry retaining device have the advantages that a flexible yielding effect of the gangue bags and a high-strength support effect of the pillars made of the concrete-filled steel tubes are combined with each other by the structure, accordingly, the rigid-flexible combination gob-side entry retaining method and the rigid-flexible combination gob-side entry retaining device are particularly suitable for gob-side entry retaining engineering in deep and high-stress states, a construction process of the gob-side entry retaining method is simple, the gob-side entry retaining speed can be effectively increased, and an operating environment in the roadway is improved.

The invention discloses a large-format camera system with field-of-view splicing, comprising: a first focal plane component, a second focal plane component, a first large-format camera lens, a second large-format camera lens, and a low-resolution camera focal plane component , low resolution camera lens, camera electronics unit, scan control unit, payload mounting plate, azimuth frame, azimuth drive mechanism, azimuth axis, pitch frame, pitch drive mechanism and pitch axis. The present invention realizes large-format imaging by combining the external field of view splicing method and the two-dimensional scanning mechanism.

The invention discloses a spring-driven space deployable annular antenna device. The spring-driven space deployable annular antenna device comprises n sets of triangular deployable assemblies and an equilateral right triangle deployable unit A; the equilateral right triangle deployable unit A is composed of n sets of triangular deployable cooperative assemblies connected below the n sets of adjacent triangular deployable assemblies; n is greater than or equal to 2; the n sets of triangular deployable assemblies are connected end to end through four-head hinges; the n sets of triangular deployable cooperative assemblies and the n sets of triangular deployable assemblies share the same set of transverse rods connected through the four-head hinges; the n sets of triangular deployable assemblies and the n sets of triangular deployable cooperative assemblies are connected end to end; and, under the action of the elasticity of a spring, folding or unfolding is carried out, so that the deployable annular antenna device is formed. The device has relatively high geometric stability; a motion mechanism and a control system are simple; after being folded, the device is small in volume and high in accepting rate; an active driving device is unnecessary; the module extensibility is high; accessories are simple; and use requirements of large-aperture space antennas, such as communication satellites and space exploration, can be satisfied.

The invention discloses a rapid differential-temperature flat plate hot embossing process for a polymer micro-nano structure. The rapid differential-temperature flat plate hot embossing process is characterized in that temperature of a hot embossing mold is kept consistent in the whole embossing period, set temperatures of an upper half mold and a lower half mold are different, the aims of smooth mold filling and mold release of the micro-nano structure are achieved through the differential-temperature mode, and the rapid differential-temperature flat plate hot embossing process is particularly suitable for rapid hot embossing of a polymer product with the single-face micro-nano structure. The temperature of the side, provided with the micro-nano structure, of the mold is set as a higher value, and the side, not provided with the micro-nano structure, of the mold is set as a lower value. At the initial stage of hot embossing, the temperature of a polymer substrate making contact with the high-temperature half mold rapidly rises to a high temperature, and mold filing is completed; and at the pressure maintaining stage, the polymer substrate is cooled through the low-temperature half mold, the formed micro-nano structure is shaped, and demolding is facilitated. By means of the process, it is avoided that because the mold is repeatedly heated and cooled, energy is consumed, and meanwhile the forming period of hot embossing is remarkably shortened; controllability of the forming process is high, the forming precision is high, and the overall consistency is good; and the mold sticking phenomenon of the polymer product is obviously improved, and demolding defects are effectively avoided.

The invention discloses a factory prefabricated steel concrete combination pipe making technology. The technology comprises following steps: firstly, according to the construction drawing need, the number and the related sizes of steel concrete combination pipes with multiple cross sections of the rectangular structures are designed; secondly, according to the drawing need, the steel concrete combination pipes are prefabricated in the factory in a segmented manner; thirdly, the steel concrete combination pipes are connected to form straight-line-shaped, the leftwards-rotated-T-shaped, an inverted-L-shaped, crossed or mouth-shaped structures. Inner concrete, outer concrete and reinforcing meshes are combined with a steel plate with the inner side with ribs to form a whole steel concrete combination shear wall through binding bars, joint work is achieved, ductility and compressive strength of the concrete are greatly improved, plasticity and toughness of the whole steel concrete combinedshear wall structure are greatly improved, the anti-deforming capacity and the anti-pressing strength of the shear wall are greatly improved, and meanwhile, due to the fact that the steel plate withthe ribs is wrapped by the concrete, the fireproof anti-corrosion aims of the steel structure building can be effectively achieved.