63results about How to "Not heavy" patented technology

The invention discloses a percussion head of an expectoration instrument, relates to the field of expectoration instruments, and provides the percussion head which achieves percussion through linear motion and is used for the expectoration instrument. The percussion head of the expectoration instrument comprises a shell, an end cover, a motor, a driving disc, a vibration disc, reset springs, a flexible head, an adjusting sleeve and a handle; at least two guide pillars are connected to a lower end plate of the shell; the end cover covers a main shell body; the motor, the driving disc, the vibration disc and the reset springs are coaxially arranged in the main shell body from top to bottom; the motor is connected with the end cover; the driving disc is connected with the motor, bearings arearranged between the driving disc and the main shell body and limit the driving disc to axial movement, an annular driving track is arranged on the driving disc, and the surface of the annular drivingtrack is in a wavy shape; the vibration disc sleeves the guiding pillars, and balls are arranged on the vibration disc; the reset springs make the balls be in contact with the annular driving track;the flexible head is connected with the vibration disc, and the adjusting sleeve is connected with the shell and is adjustable in axial position; the handle is connected with the main shell body.

The invention belongs to the field of bridge reinforcing, and particularly relates to a novel old-arch-bridge reinforcing structure and a construction method thereof. The novel old-arch-bridge reinforcing structure comprises a bridge body 1, an epoxy mortar filling layer 4 is arranged below the bridge body 1, and a transverse stiffening steel frame is arranged on the epoxy mortar filling layer 4.Arc ribs are connected by using prefabricated box-type splicing steel plates 8, and prestress is applied between the arc ribs by using prestressed reinforcements 9. Then concrete is poured at arch feet, the arch rib and steel plate connecting ends and tensioning anchoring anchorage devices to form an integral structure. Finally, H-shaped steel 7, the box type splicing steel plates 8 and weld joints 5 are subjected to painting and other anti-septic treatment. The transverse stiffening steel frame structure comprises an anchor screw rod 2, an anchor bolt 3, a stiffening rib 6 and the H-shaped steel 7. The structure technology of the novel old-arch-bridge reinforcing structure can reinforce arch bridges, construction is simple and convenient, the cost of reinforcement is low, dead weight enhancement is less, and the reinforcement effect is good; and the novel old-arch-bridge reinforcing structure is a relatively economical and safe method to reinforce the arch bridges based on structuralforce analysis.

The invention relates to the technical field of bridge construction, in particular to a bridge pier structure and a construction method thereof. The bridge pier structure comprises a prefabricated bearing platform, a prefabricated bridge pier, a steel plate assembly and a thin-walled circular ring; two groups of first steel rebars and second steel rebars which are arranged in the vertical direction and uniformly distributed in the form of a circumference; the first steel rebars are positioned on the internal sides of the second steel rebars; the top ends of the first steel rebars and the second steel rebars both extend out of the upper surface of the prefabricated bearing platform; a hollow steel tube which runs through the prefabricated bridge pier and is arranged in the vertical direction is embedded in the prefabricated bridge pier; and the prefabricated bridge pier is arranged on the prefabricated bearing platform through the hollow steel tube. The bridge pier structure has the advantages that the structural design is simple; the construction is convenient; as only a small part of later pouring concrete needs to be poured, the construction efficiency is enhanced, and the construction period of the bridge is reduced; the influence of bridge construction on city traffic environment is effectively relieved; and the assembling strength and integrity of the prefabricated bridgepier and the prefabricated bearing platform are also guaranteed.

The invention provides a battery cover, a preparation method of the battery cover, and a mobile terminal. The preparation method of the battery cover comprises the following steps: providing a ceramicsubstrate, wherein the ceramic substrate comprises an inner surface and an outer surface which are oppositely arranged; forming a reinforcing layer covering the ceramic substrate on the inner surfaceof the ceramic substrate; processing the outer surface, so that the thickness of the ceramic substrate is reduced to a first preset thickness; and processing the reinforcing layer, so that the thickness of the reinforcing layer is reduced to a second preset thickness. The thickness of the ceramic substrate in the battery cover can be reduced to an expected value under the condition that the ceramic substrate is not broken, and the prepared battery cover has sufficient structural strength on the premise that the weight of the prepared battery cover is close to a glass front cover.

The invention discloses prefabricated pipe joint assembly equipment and a construction method thereof. The prefabricated pipe joint assembly equipment comprises a supporting-connecting mechanism, a positioning mechanism, a tensioning mechanism and a power system, wherein the supporting-connecting mechanism comprises a lifting device and a supporting-connecting frame; the lifting device comprises a lifting oil cylinder and a steel supporting plate; the positioning mechanism comprises a rectangular rear positioning frame, positioning oil cylinders and clamping parts; the positioning oil cylinders are correspondingly arranged on four corners of the rectangular rear positioning frame; the clamping parts are fixedly connected with the front ends of the piston rods of the positioning oil cylinder; the tensioning mechanism comprises telescopic oil cylinders and sliding guide rails; and the power system comprises a hydraulic pump, a control valve group and an oil tank. By adoption of the prefabricated pipe joint assembly equipment and the construction method, a one-step forming and assembly process of a prefabricated assembly-type comprehensive pipe rack can be achieved; the one-step forming and assembly process comprises the steps of pipe joint supporting and connection, adjusting and aligning, tensioning, and the like; and the operation is simple, the working efficiency is high, the working period is short, the degree of mechanization is high, the labor intensity is low, the labor cost is reduced, and the environmental pollution is reduced.

The invention relates to a plate cabinet mounting lifting frame of an urban rail transit power supply system. The plate cabinet mounting lifting frame is wholly of a detachable structure. The plate cabinet mounting lifting frame comprises an I-shaped steel beam and first vertical columns, wherein the first vertical columns are arranged below the I-shaped steel beam, the first stand columns are movably connected with second stand columns, and a plurality of positioning pins used for adjusting the heights are arranged on the second stand columns; a pulley block and an electric hoist are movablyconnected below the I-shaped steel beam, universal wheels are arranged below the second stand columns, base steel channels are arranged between the second stand columns and the universal wheels, inclined supporting steel channels for supporting the second stand columns and the base steel channels are arranged between the second stand columns and the base steel channels; and the universal wheels are provided with brake systems. The plate cabinet mounting lifting frame has the advantages that the electric hoist is directly installed on the movable pulley block on the lifting frame to carrying out hoisting installation on a plate cabinet, so that the damage and pollution to a structural beam or the wall top is reduced; the plate cabinet mounting lifting frame is high in structural strength, and not easy to deform; and the plate cabinet mounting lifting frame greatly improves the installation efficiency of the plate cabinet, saves the labor, and reduces the safety risk of aloft operation.

A cold storage wall is characterized in that the cold storage wall comprises a matrix wall, polyurethane foam layers and vacuum insulation boards, wherein, vacuum insulation boards are inserted in the polyurethane foams of different thickness, and the vacuum insulation boards in each thickness layer are arranged in intervals; the thickness of the polyurethane foam layers is between 8mm and 25mm; material A of the polyurethane foam layer is isocyanate and material B is polyester polyol and auxiliary agent. The construction method of the wall comprises the steps of (1) spraying a polyurethane foam layer; (2) paving the vacuum insulation boards in intervals, and spraying a layer of polyurethane foam; (3) repeating step (1)-(2) to obtain a polyurethane foam layer wall that has the vacuum insulation boards inserted in. The beneficial effects of the present invention are that (1) the heat insulation effect is good; (2) the construction is convenient; and (3) the cold storage wall slit condensed water is prevented from icing and destroying the wall structure.

A diff case (4) is attached to a side face of a ring gear wheel (48) on the opposite side to the side on which the ring gear wheel (48) and a pinion gear wheel (35) mesh with each other. The ring gear wheel (48) integrally has a boss portion (54), in which a driven shaft is fitted, on the meshing side with the pinion gear wheel (35). An annular member (56) slidably movable in an axial direction thereof is provided on the boss portion (54) with a guide portion for guiding the annular member (56). A lock pin (70) is provided on the annular member (56) for inserting into pin holes (71, 72) formed in the ring gear wheel (48) and a left output side cam to place the differential mechanism into a locked state. A sliding region within which the annular member (56) slidably moves is disposed so as to be included in a projection region of the diameter of the pinion gear wheel (35).

A display which does not require color filters, has low optical losses, and is not heavy and large, and a method for displaying an image using the display includes a substrate on one side of which sub-pixels are arranged. Each sub-pixel includes two opposite electrodes and an emitter layer which is interposed between the two electrodes. The emitter layer receives the light projected from an excitation light source, and is able to radiate photoluminescence light. The photoluminescence light from the emitter layer may be controllably quenched by an electrical field formed by the electrodes.