53results about How to "Guaranteed strength performance" patented technology

The invention relates to a manufacturing process of a mold for manufacturing a carbon fiber box. In the process, a male mold is used. The manufacturing process comprises the following steps: step 1, spraying a gel coat on the outer surface of the male mold and curing to form a gel coat layer; step 2, coating the gel coat layer with surface felt to form a surface felt layer; step 3, gluing at least three layers of shortly-chopped felt on the surface felt layer to form a shortly-chopped felt layer, and curing the surface felt layer, resin and the shortly-chopped felt layer to form a glass fiber reinforced plastic layer; step 4, sequentially laying the shortly-chopped felt layer, a multi-axial cloth layer and a bordering cloth layer on the glass fiber reinforced plastic layer; step 5, filling in vacuum, namely sequentially laying de-molding cloth, a double-layered flow guide net, a flow guide belt, a flow guide pipe and a double-layered vacuum bag on the layer in the step 4, and after keeping pressure, filling to primarily form a female mold shell plate; step 6, gluing a steel frame and a steel plate; and step 7, after sticking the steel frame and the female mold shell plate for at least 48 hours, taking out the male mold from the female mold shell plate so as to manufacture the mold. The manufacturing process provided by the invention has the characteristics that the high-strength performance of the mold is guaranteed, the durability of the mold is improved, the service life of the mold is prolonged and the like.

The invention relates to phase-change roof self-insulation ceramsite concrete, and belongs to the technical field of building materials. The problems that existing ceramsite concrete is low in strength property and poor in energy storage effect can be solved. The phase-change roof self-insulation ceramsite concrete comprises, by mass, 30%-40% of cement, 20%-35% of pottery sand, 8.0%-13% of phase-change material, 10%-20% of ceramsite and 5.0%-8.0% of coal ash. The phase-change material uses the ceramsite as a loaded carrier. According to the concrete, the phase-change material is added and loaded onto the ceramsite, hence, a good energy storage effect can be achieved, and a large amount of heat can be stored or released when phase change happens; the phase-change latent heat range is wide, indoor temperature fluctuation is reduced, and cost is lowered; meanwhile, the strength property of the concrete can be guaranteed.

Provided is a wheeled obstacle-surmounting robot. A telescopic support cylinder comprises a plurality of sleeves which are sleeved with each other sequentially and slidably matched with each other, wherein the sleeves comprises an upper sleeve body, a plurality of middle sleeve bodies and a lower sleeve body, and a mounting frame is arranged at the upper end of the upper sleeve body; a scissor-fork linkage mechanism is arranged in the sleeves, and the lower end of the scissor-fork linkage mechanism is connected with the lower sleeve body; the upper end of the scissor-fork linkage mechanism extends out of the upper sleeve body and is connected with a first drive transmission mechanism which drives the scissor-fork linkage mechanism to expand and contract, and the first drive transmission mechanism is mounted at a mounting frame; the mounting frame is hinged to a connecting piece. According to the wheeled obstacle-surmounting robot, the scissor-fork linkage mechanism is better in telescopic adjustment ability and faster in telescopic adjustment speed, and meanwhile is also arranged in the sleeves which are sleeved with each other sequentially and slidably matched with each other; through the combination of the scissor-fork linkage mechanism and the sleeves, not only can the telescopic range and the telescopic speed be ensured, bu also the strength capability can be ensured; therefore, the support effect is more stable and tighter, the obstacle-surmounting ability of a ladder-climbing and obstacle-surmounting robot is stronger, and the obstacle-surmounting speed is faster.

The invention discloses a drum-type tractor band-type brake monitoring device. The device comprises a power circuit, a pressure sensor, a signal processor and a display module, wherein the pressure sensor, the signal processor and the display module are connected with the power circuit, the pressure sensor is arranged on a brake arm to be used for acquiring a brake arm stress change signal, the acquired stress change signal is input into the signal processor by the pressure sensor for data processing to obtain a tractor braking torque monitoring signal, and the monitoring signal is input into the display module to be displayed. According to the device, a stress gauge is adopted to acquire brake arm stress change data, and then whether tractor braking torque meets using requirements is judged according to stress change. The device can be used for indirectly monitoring tractor braking torque and is convenient to install, reliable in use and easy to maintain. The safety performance of a tractor is improved, the dimension of the tractor is not affected at all, and the strength performance of the whole tractor is guaranteed.

The invention provides a compound admixture for anti-crack limestone powder and a preparation method of the compound admixture. The compound admixture comprises, by mass, 60-70 parts of limestone powder, 28-40 parts of coal ash, 1-2 parts of polypropylene fibers and 0.1-0.2 part of triethanolamine. By the compound admixture for the anti-crack limestone powder, concrete contraction can be reduced and concrete anti-crack performance can be improved while working performance and mechanical performance of concrete are guaranteed, so that durability of limestone powder concrete is improved, and application of the limestone powder to the concrete is widened.

The invention provides a splicing coating method for a semiconductor part. The method comprises the following steps: shielding the surface, making contact with a clamp in coating equipment, of the semiconductor part by adopting a protective film; coating the treated semiconductor part, and controlling the coating temperature and power to finish the coating of the non-shielding surface; attaching the protective film to the coated surface, and removing the original shielding protective film; and repeating the coating of the non-shielding surface, and removing the protective film on the coated surface after the coating is completed until the semiconductor part with the fully-coated surface is obtained. According to the method, the whole surface of the semiconductor part can be coated in a splicing coating manner, and particularly, the non-coating surface is shielded firstly, so that the consistency of coating in different sequences can be ensured, and the requirements of a subsequent welding process are met; and coating parameters are correspondingly adjusted according to selected semiconductor part materials, crystal grain change can be avoided, the strength performance of the part is guaranteed, and the method is suitable for different kinds of products and wide in application range.

The invention provides a stair-climbing and obstacle-crossing robot. The stair-climbing and obstacle-crossing robot is characterized in that the structures of second telescoping support cylinders are same as those of first telescoping support cylinders, each first telescoping support cylinder comprises a plurality of sleeves, wherein the sleeves are arranged in a sleeved mode in sequence, and the sleeves are in slipping fit with each other. Each group of sleeves comprises the upper sleeve, the middle sleeves and the lower sleeve, wherein an installation frame is installed at the upper end of the upper sleeve. A scissor-fork type connecting rod mechanism is arranged in each group of sleeves, the lower ends of the scissor-fork type connecting rod mechanisms are connected with the lower sleeves respectively, the upper ends of the scissor-fork type connecting rod mechanisms extend out of the upper sleeves respectively, the scissor-fork type connecting rod mechanisms are connected with first drive transmission mechanisms driving the scissor-fork type connecting rod mechanisms to extend and retract respectively, the first drive transmission mechanisms are installed on the installation frames respectively, and the installation frames are hinged to connecting pieces respectively. The stair-climbing and obstacle-crossing robot has the advantages that the scissor-fork type connecting rod mechanisms have better telescopic adjustment capacity and higher telescopic adjustment speed, meanwhile, the strength capacity is ensured, the supporting is more stable and firmer, the stair-climbing and obstacle-crossing capacity of the stair-climbing and obstacle-crossing robot is higher, and the speed in the stair-climbing and obstacle-crossing processes is higher.

A low-temperature pipeline steel for LNG gas transmission main line and a preparation method thereof, belonging to the technical field of pipeline steel. The weight percent of its chemical composition is: C: 0.03-0.08wt%, Nb: 0.05-0.08wt%, Si: 0.15-0.30wt%, Mn: 1.40-1.65wt%. First smelting, then continuous casting, the steel billet is reheated and then rolled and cooled on the 4300-5500mm production line; after that, the pipe is made and welded through the expanded diameter welded pipe production line. The advantage is that the comprehensive performance is good, and it is suitable for the construction of the transmission pipeline after LNG gasification.

The invention discloses a method for preparing ceramsite by using coal-based solid waste, which comprises the following steps: classifying according to different plasticity of coal-based solid waste raw materials to obtain ceramsite raw materials; and after drying the ceramsite raw material, arranging an auxiliary combustion area in an interval of 800-1000 DEG C for decarburization, and roasting in an interval of 1000-1200 DEG C. The coal-based solid waste is efficiently utilized, an optimized roasting method is adopted, the full-solid waste ceramsite product is prepared, and the mechanical property of the product is excellent; and the process is simple, is suitable for industrial popularization and application, can be used as a building lightweight aggregate or a building gravel material, and has excellent environmental benefits, economic benefits and social benefits. The method is suitable for the field of coal-based solid waste utilization.

The invention provides a method for improving the water filtering performance of paper by adopting microfibrillated fibers, and particularly relates to a method for forming a compound by adopting the microfibrillated fibers and fine components and then filling the compound into a papermaking process, so that the water filtering performance and the retention performance of the paper can be improved, the ash content in the paper can be effectively improved, and the use amount of paper pulp fibers can be reduced. Under the same paper making process conditions, the content of the filler in the paper can be increased on the premise that the strength performance of the paper is guaranteed, the papermaking water filtration and retention performance of the paper can be effectively improved, and the problem that the water filtration performance is reduced due to the fact that microfibrillated fibers are used for a papermaking system is effectively solved. The microfibrillated fibers and fine components obtained through white water recovery are adopted to form a compound to be used for paper filling, and the use amount of fresh paper pulp can be effectively reduced.

The invention relates to a high-precision clamping force measuring apparatus which comprises a pressure measuring device. The pressure measuring device comprises a mechanics sensor and a left bearing shaft and a right bearing shaft coaxially mounted at the two ends of the mechanics sensor; the pressure measuring device is coaxially mounted on a horizontal base; a left linear bearing and a right linear bearing are coaxially fixed at the two ends of the base respectively; the left bearing shaft and right bearing shaft at the two ends of the mechanics sensor are correspondingly mounted in the left linear bearing and right linear bearing in a sliding manner respectively; and the left linear bearing and right linear bearing are coaxially arranged. The high-precision clamping force measuring apparatus provided by the invention has a scientific and reasonable design, a simple structure and high reliability, is convenient to operate, and effectively improves the measurement accuracy; and moreover, as the bearing shaft has certain expansion amount, the pressure measuring device is effectively protected from damage, and the test efficiency is improved.

The invention discloses a splicing type construction method of a wall body. The splicing type construction method comprises the following steps that column bodies on the two sides of the wall body are fixed to the tops of corresponding column bodies below the wall body; when the distance between the two column bodies is smaller than or equal to one meter, the two column bodies are fixedly connected through transverse ribs; when the distance between the two column bodies is larger than one meter, the tops of the adjacent lower-layer beam bodies and the two column bodies are spliced and fixed through connecting pieces and at least one prefabricated wallboard horizontal pre-tightening tie bar or vertical pre-tightening tie bar; a fixed beam body is placed on the top between the two column bodies in the extending direction of the wall body; when the distance between the two column bodies is smaller than or equal to one meter, the screw rods at the bottoms of the beam bodies are fixedly connected with the screw rods at the tops of the adjacent lower-layer beam bodies through vertical ribs; cast-in-place concrete C is conducted on the wall defined by the column bodies and the beam bodies and the area located outside the prefabricated wall panel; and after the cast-in-place concrete C is solidified, wall building and forming are completed. According to the splicing type construction method of the wall, the building construction efficiency can be improved, the wall is firm and stable, the integration effect is good, and the good anti-seismic effect is achieved.

The invention discloses a 2K cold compressor impeller. The 2K cold compressor impeller is characterized by comprising an impeller rear cover plate (6), a plurality of main blades (2) and a plurality of flow dividing blades (3); the upper surface of the impeller rear cover plate (6) is a U-shaped arc surface with the center protruding upwards, and the center is provided with a rotation shaft connecting port (1); the parts extending from the lower edges of the outer sides of the main blades (2) to the upper edges are downward-protruding arcs matched with the U-shaped arc surface of the impellerrear cover plate (6); the parts extending from the lower edges of the outer sides of the flow dividing blades (3) to the upper edges are downward-protruding arcs matched with the U-shaped arc surfaceof the impeller rear cover plate (6); the main blades (2) and the flow dividing blades (3) are distributed on the U-shaped arc surface of the impeller rear cover plate (6) in a staggered manner; a helium outlet (5) is formed in the inner sides of every two adjacent main blades (2), and a helium inlet (4) is formed by the outer side of each main blade (2) and the outer side of the corresponding adjacent flow dividing blade (3).