13results about How to "Reasonable and reliable structural design" patented technology

The utility model relates to the technical field of bridge reinforcement, in particular to a reinforcing device for external prestressing tendons of a hollow slab bridge, which comprises a hollow slab bridge, the hollow slab bridge is composed of N longitudinally arranged hollow slabs, N is a positive integer larger than or equal to 4, a hinge joint is arranged between any two adjacent hollow slabs, and the hinge joint is connected with the hollow slabs. A plurality of arc-shaped transverse prestressed tendons distributed in the front-back direction are arranged below the hollow slab bridge, each transverse prestressed tendon comprises M bundles of steel strands, M is a positive integer larger than or equal to 3, and the two ends of each transverse prestressed tendon are anchored to the left side and the right side of the hollow slab bridge through anchoring assemblies respectively. The middle section of each transverse prestressed tendon is provided with P rhombic bracket assemblies; the problems that maintenance and repair are relatively difficult, the maintenance cost is high and the construction period is long due to large prestress loss in an existing external prestress reinforcing method for reinforcing and transforming the hollow slab bridge are solved.

The utility model relates to the technical field of bionic pressure sensors, in particular to a broadband wide piezoresistive sensing structure simulating scorpion threshold response characteristics, which comprises a threshold adjusting structure and a piezoresistive sensing unit. The threshold value adjusting structure comprises a flexible deformation cover and a threshold value sensing structure base, the flexible deformation cover covers the top end of the threshold value sensing structure base, the piezoresistive sensing unit is arranged in the threshold value sensing structure base, and a rectangular through groove is formed in the bottom of the threshold value sensing structure base; a threading hole is formed in the side wall of the threshold sensing structure base; the flexible deformation cover comprises a sheet, and the center of the lower surface of the sheet is integrally connected with an inverted-cone-shaped protruding block. The problems that the inherent contradiction exists between the sensitivity and the bandwidth performance of an existing piezoresistive sensor, in particular, structural instability under large signals is easily caused when the sensitivity is improved through a traditional design, and the response capacity to small signals is greatly reduced by increasing rigid support to expand the measuring range are solved.

The utility model relates to the technical field of mine hoisting, in particular to an eccentric gear clearance adjustable encoder device for a mine hoist, which comprises an end cover, a mounting hole is arranged on the end cover, and an eccentric gear component is mounted on the end cover through the mounting hole. The eccentric gear assembly comprises an eccentric bearing frame, a gear shaft I and a connecting body, the eccentric bearing frame is detachably installed on the front surface of the end cover, the connecting body and the eccentric bearing frame are installed in corresponding installation holes in the end cover, an encoder is installed on the outer side face of the connecting body, an input shaft of the encoder is connected with the shaft end of the gear shaft I, and an output shaft of the encoder is connected with the shaft end of the gear shaft II; the shaft end of the gear shaft I is installed in the eccentric bearing frame through a bearing, and the gear end of the gear shaft I is connected with a gear shaft II in an engaged mode. The encoder device solves the problems that an existing encoder device is large in gear meshing clearance due to insufficient machining precision and unstable in signal output due to the fact that the clearance is aggravated by abrasion after long-term operation, and then the control precision and safety performance of a mine hoist are affected.

The invention relates to the technical field of agricultural machinery, in particular to a biological bacterial fertilizer and seed same-hole precision sowing device which comprises a seed box, a seed sowing device, a seed input pipe, a collecting bin, a bacterial fertilizer box, a fertilizer discharger, a fertilizer conveying hose, a bacterial fertilizer input pipe, a distribution bin, a discharge pipe and a controller. A discharging port of the seed box is communicated with a feeding port of the seed metering device, a discharging port of the seed metering device is communicated with a feeding port of the seed input pipe, the seed input pipe is installed at the upper end of the collecting bin, a discharging port of the bacterial fertilizer box is communicated with a feeding port of the fertilizer feeding device, and a discharging port of the fertilizer feeding device is communicated with a feeding port of the fertilizer conveying hose. A discharging opening of the fertilizer conveying hose communicates with a feeding opening of the bacterial fertilizer input pipe, the bacterial fertilizer input pipe is installed at the upper end of the collecting bin, and a feeding opening is formed in the upper end of the collecting bin; the problems that after an existing mechanical seed and fertilizer same-hole seeder works for a long time, due to abrasion of a chain or a belt, the seed and fertilizer synchronism is poor, the use amount of biological bacterial fertilizer cannot be accurately controlled, and waste is caused are solved.

The invention relates to the technical field of image recognition, in particular to a fish disease category increment method based on double distillation, which comprises the following steps: S1, performing data enhancement on new category data and part of old category data in a category increment learning model; s2, constructing a teacher model and a student model, respectively inputting the data stream after data enhancement into the teacher model and the student model to extract a feature matrix, and obtaining sample information by adopting a characterization deviation distillation module; s3, a similar pair distillation module is adopted to ensure the consistency of the characterization features of the teacher model and the characterization features of the student model, and catastrophic forgetting caused by excessive correction is prevented; s4, reversely training the teacher model by adopting a random momentum updating method and utilizing the parameters trained by the student model, and updating the teacher model; the problem of disastrous forgetting caused by excessive correction is prevented by controlling the consistency of the representation similarity between the teacher model and the student model.

The utility model relates to the technical field of tunnel protection, in particular to a rockfall-preventing shading shed suitable for being used between two tunnel portal openings, which comprises a steel arch group and a shading top fixedly mounted on the upper surface of the steel arch group. The steel arch group comprises a plurality of steel arches; a plurality of steel arch bases are arranged on the left side and the right side of the steel arch group; a supporting rod is fixedly mounted on each steel arch base; the supporting rods are fixedly connected with arch feet of the steel arches in a one-to-one correspondence mode. The front end and the rear end of the steel arch set are each provided with a pair of supporting piles, the pair of supporting piles at the front end of the steel arch set are fixedly connected with the two steel arch bases located at the foremost portion respectively, and the pair of supporting piles at the rear end of the steel arch set are fixedly connected with the two steel arch bases located at the rearmost portion respectively. The supporting piles in the same pair are jointly connected with a steel cable net. The light ray impact on a driver when the driver goes in and out of the tunnel can be relieved, and meanwhile the protection effect on broken stones falling off from the slope above the tunnel portal is improved.

This utility model relates to the field of water conservancy construction technology, specifically a wall-brushing device for concrete anti-seepage walls used in grab bucket excavators. It includes a base plate, with two opposing base vertical plates fixed to the lower surface of the base plate. A first reinforcing plate is fixed between each base vertical plate and the base plate. Two outer wire mesh clamps are fixed to the upper surface of the base plate, and two inner wire mesh clamps are detachably installed between the two outer wire mesh clamps. The two outer wire mesh clamps and the two inner wire mesh clamps correspond one-to-one and are all semi-circular. Several wire brushes, evenly spaced along their arc-shaped edges, are clamped between each outer wire mesh clamp and its corresponding inner wire mesh clamp. Several reinforcing ribs are fixed between the tops of the two outer wire mesh clamps along their arc-shaped edges. This invention solves the problems of existing concrete anti-seepage wall joint treatment where wall brushing, slag removal, roughening, and groove milling require two separate sets of equipment for step-by-step operation, resulting in low construction efficiency, high construction costs, and time consumption.

The application is a kind of impeller blade for full hydrogen strong convection cover type annealing furnace platform fan, which is used to increase the heat obtained by steel coil during the use of full hydrogen strong convection cover type annealing furnace. The blade body of the impeller blade for full hydrogen strong convection cover type annealing furnace platform fan includes vertical flat piece and curved piece, and the curved piece is connected to the upper side of the vertical flat piece. The rear surface of the curved piece is part of a conical surface, and the front surface is parallel to the rear surface. The generatrix of the conical surface is the intersection line of the rear surface of the vertical flat piece and the rear surface of the curved piece. The apex of the conical surface is located between the center line of the impeller and the intersection line. The rotation axis of the conical surface is arranged on the plane perpendicular to the vertical flat piece, and the rotation axis is located behind the curved piece. The optimization design of the structure of the impeller blade makes the impeller meet the requirements of fluid mechanics, high speed and high temperature. In full hydrogen atmosphere, the air volume can reach 60000m 3 / h.

The present invention is specifically a centrifugal high-speed seeding device, which solves the problems of poor seeding quality and low efficiency of existing broadcast seeding devices. A seeding wheel is arranged between the left support frame and the right support frame, and a limited seed box and seeding holes are arranged in the seeding wheel; a seed blocking sleeve is sleeved on the seeding wheel, and a seed protection hole is opened on the seed blocking sleeve, and a seeding shell is sleeved on the seed blocking sleeve, and a seed outlet hole is arranged at the lower end of the seeding shell; an adjustment disk is arranged at the right end of the seed blocking sleeve, and a seed delivery pipe is arranged between the seed box and the limited seed box, a seeding shaft is arranged at the center of the left end of the seeding wheel, and a seeding sprocket is arranged at the left end of the seeding shaft. The present invention greatly improves the sowing quality and improves the sowing efficiency.

This utility model provides a battery pack charging stand and a charger including the same. The upper and lower shells of the battery pack charging stand each have a U-shaped recessed charging coupling space on their outer sides. Pairs of L-shaped holes are formed at the junction of the bottom plate and side plate of the charging coupling space, and each L-shaped hole accommodates a charging electrode plate. The charging electrodes are arranged in pairs, staggered on the upper and lower shells. Positioning mechanisms for the charging electrodes are provided on the inner surfaces of the upper and lower shells. The charging electrodes are L-shaped, including an integrally formed narrow square portion and a wide square portion. The narrow square portion extends from the L-shaped hole into the charging coupling space for inserting a battery pack. The wide square portion is limited in six directions (front / back, left / right, and up / down) by the positioning mechanism. This utility model can meet the requirements of simultaneous charging of multiple battery packs, with a robust structure and compact size.

This utility model relates to a structure for treating bridge abutment slab settlement. The pile foundation has piles extending deep into the bearing layer beneath the soft soil foundation. A support wall is located behind the pile foundation and situated on the soft soil foundation. From bottom to top, the pile foundation includes a pile cap, an abutment, and abutment cap. One end of a slab rests on the abutment cap, and the other end rests on the support wall. The support wall has a tenon at its rear to resist the thrust of the telescopic mechanism. A wedge-shaped settlement compensation block and a telescopic mechanism are arranged on the support wall between the slab and the tenon. The lower end of the wedge-shaped settlement compensation block is inserted into the gap between the slab and the support wall. One end of the telescopic mechanism abuts the tenon, and the other end abuts the wedge-shaped settlement compensation block. During its extension, the telescopic mechanism pushes the wedge-shaped settlement compensation block towards the slab to lift the rear of the slab. The advantages are: the structure is reasonably and reliably designed, easy to operate, improves the construction efficiency of treating bridge abutment slab settlement, has low cost, allows for earlier traffic opening, and facilitates residents' travel.

The utility model relates to the technical field of concrete conveying, in particular to a movable crossing concrete conveying device which comprises a base, an engine and a spiral conveyor are installed on the base, a driving belt wheel is installed at the output end of the engine, and a main walking wheel is installed on the lower surface of the base. The spiral conveyor comprises a groove body, a spiral shaft is rotationally connected into the groove body, spiral blades are fixed to the outer surface of the spiral shaft, a driven belt wheel is installed at the front end of the spiral shaft, the driven belt wheel is located on the outer side of the groove body, the driven belt wheel is in transmission connection with the driving belt wheel through a belt, and a feeding hopper is installed at the top of the front end of the groove body. Auxiliary walking wheels are installed on the front portion of the lower surface of the bottom plate, supporting columns are installed on the rear portion of the lower surface of the bottom plate, a discharging port is formed in the rear portion of the lower surface of the bottom plate, and a discharging adjusting mechanism is installed at the rear end of the tank body. The problems that the construction efficiency is low, the equipment is inconvenient to move and the potential safety hazard is large when a channel embankment beside a narrow side channel top road is heightened in an existing concrete conveying mode are solved.

The utility model relates to the technical field of bridge construction, in particular to a bridge floor expansion joint rubber water stop strip mounting device which comprises a rectangular support, a small electric winch is bound on a front transverse rod of the rectangular support, a longitudinal inclined rod with the front portion higher than the rear portion is fixed to the middle of a rear transverse rod of the rectangular support, and a left-right through sliding groove is formed in the longitudinal inclined rod. A clamping and fixing device is slidably connected into the sliding groove, a fixed pulley is arranged at the end of the longitudinal inclined rod, a steel wire rope of a small electric winch is wound around the fixed pulley, and a hook is fixed to the end of the steel wire rope. The clamping and fixing device comprises an adjusting bolt and two U-shaped clamps, a rod body of the adjusting bolt is inserted into the sliding groove in a sliding mode, the two U-shaped clamps are installed at the two ends of the adjusting bolt respectively, and the two U-shaped clamps are in bilateral symmetry about the longitudinal inclined rod; the problems that an existing bridge deck expansion joint rubber water stop strip installation mode is labor-consuming, time-consuming and low in construction efficiency are solved.