25results about How to "Solve the cracking problem" patented technology

An ultra-wideband end-fire antenna with a common aperture embedded in a metal carrier includes a metal cavity with a coaxial cable compartment on one side. A radiator module is connected to the bottom of the metal cavity via a radiator fixing slot. The radiator module includes a common aperture antenna substrate. A low-frequency radiator is printed on the side of the common aperture antenna substrate closer to the coaxial cable compartment, and a high-frequency radiator is printed on the side farther from the coaxial cable compartment. This invention utilizes a dual-band antenna in a common aperture design to enhance the channel capacity and anti-fading capability of the communication system. At the same time, by achieving the antenna's carrier conformal characteristics, high isolation, and miniaturization, it enriches the antenna's application scenarios and improves the overall performance of the communication system.

The invention relates to the technical field of hovercraft apron adhesive tape coating, and discloses a novel formula of hovercraft apron adhesive tape coating. A semi-reinforcing carbon black and high-structure reinforcing carbon black combined system, an anti-aging system formed by combining a physical anti-aging agent and a chemical anti-aging agent, a sulfur vulcanization system, a tackifier and other matching systems are used as auxiliary materials. Through the comprehensive scheme of improving the rubber formula and coating the anti-aging elastic coating on the outer surface of the flexible apron rubber coating layer, on the premise of not generating negative effects on the existing materials and products, the anti-aging elastic coating is formed; the anti-aging performance of the rubber material of the flexible apron rubber coating layer and the anti-aging elastic coating coated on the outer surface of the flexible apron rubber coating layer are researched, so that the problem that the exposed surface of the flexible apron rubber coating layer is cracked after the QDC sails and parks for a long time is solved, and the overall performance of the product is improved.

The invention provides a negative water pressure radical treatment method for underground structure penetrating crack leakage in a high water pressure environment. The negative water pressure radical treatment method comprises the following steps: carrying out base layer treatment on a to-be-treated base surface; a series of grouting holes are drilled in the two sides of the crack respectively; water stop needle heads are installed in the grouting holes respectively; slurry is injected through the water stop needle head, and the slurry contains a ZJ-III high-molecular elastic plugging agent; reinforced grouting is conducted, and grouting liquid for reinforced grouting is ZJ-V inorganic non-dispersive adaptive grouting liquid; the water stop needle head is dismantled, and the grouting hole is blocked through an X13 high-strength alkali-resistant repairing agent; a V-shaped groove is formed in the crack, and a base plane is subjected to chiseling treatment; the surface of the V-shaped groove is subjected to wetting treatment, and an SK-3 nanometer silicon ion crack repairing modifier is sprayed; blocking the V-shaped groove and paving an X14 composite polymer alkali-resistant fiber sealing layer; and a protective layer is laid after maintenance. The method can fundamentally solve the problem of repeated leakage.

This utility model relates to the field of port engineering construction equipment, and discloses a drainage ditch forming device, including a template system, a support assembly, an expansion joint forming assembly, and a concrete pouring thickness monitoring assembly. The template system consists of parallel inner and outer templates forming a cavity that matches the cross-section of the drainage ditch. Double-sided waterproofing strips are pasted at the template joints to prevent grout leakage. The support assembly secures the templates with tie bolts and steel pipe supports, ensuring stability during concrete pouring. The expansion joint forming assembly consists of a vertically arranged foam rubber sheet within the cavity and positioning components fixed to the inside of the template, used to prefabricate expansion joints during pouring. The thickness monitoring assembly consists of an array of ultrasonic thickness sensors arranged along the height of the inner template to detect the concrete pouring thickness in real time. This device effectively prevents grout leakage, maintains template positioning accuracy, prefabricates expansion joints, and monitors pouring thickness, improving the construction quality and efficiency of drainage ditches.

The present invention discloses a liquid filling deep drawing forming device for an explosion-proof shielding tube, and the present invention relates to the technical field of shielding tube production, comprising a base, the top of the base is fixedly connected to a slide bar, the top of the slide bar is fixedly connected to a top plate, the top of the top plate is fixedly connected to a first hydraulic cylinder, the output end of the first hydraulic cylinder is fixedly connected to a punch die, and also comprises a hydraulic support mechanism, the inner side surface of the hydraulic support mechanism is fixedly installed at a position below the surface of the slide bar. The liquid filling deep drawing forming device for the explosion-proof shielding tube achieves a high-viscosity liquid with a large tension. Compared with a low-viscosity liquid, a high-viscosity liquid has a greater supporting force on a sheet material without causing a non-continuous contact surface of the sheet material. The punch die impacts downward, and the support of the high-viscosity liquid prevents the sheet material from wrinkling. The liquid guide component stores the squeezed high-viscosity liquid, and solves the problem that the squeezing of particles will make the surface of the shielding tube uneven.

The invention relates to the technical field of ferrous metallurgy, and discloses welding wire steel for maritime work equipment and a smelting method.The smelting method comprises the steps that an ingot mold and a heat preservation riser are prepared, and drying and heat preservation are conducted in a heating furnace; the method comprises the following steps: preparing materials according to the chemical components of the welding wire steel, polishing the surface, sequentially charging in a smelting furnace, carrying out vacuum induction smelting, starting to carry out power transmission smelting when the vacuum degree is less than or equal to 10Pa, sequentially adding carbon blocks, metal silicon and aluminum in batches when the vacuum degree is less than or equal to 5Pa, filling argon, adding ferrotitanium, metal manganese and metal boron, finally adding rare earth zirconium, regulating the temperature to 1590-1620 DEG C, and tapping, casting in a steel ingot mold; and carrying out heat treatment on the blank to obtain the welding wire steel cast ingot. By adding trace Ti, B and rare earth alloy elements, a bainite structure is obtained in a wide cooling range while grain structures in the steel are refined and inclusions are modified, the toughness of a welding seam is improved, the low-oxygen and low-nitrogen steel for the welding wire is prepared by adopting a vacuum induction process, and the problem of cracking in the cold drawing process of the welding wire steel is solved.

The utility model relates to steel combined beam engineering technical field, concretely relates to a UHDC corrugated steel combined bent cap, including bent cap body, the cantilever end of bent cap body is provided with straight web, the upper surface of bent cap body is provided with super high ductility concrete (UHDC) layer, the below of super high ductility concrete layer is provided with ordinary concrete (NC) layer, super high ductility concrete layer and ordinary concrete layer are connected through connecting structure, the middle position of bent cap body is provided with corrugated steel web, prolongs maintenance cycle and bent cap bears negative bending moment, and the upper and lower layer concrete forms occlusal connection through dentiform interface, can improve the durability and security of bent cap greatly.

The utility model relates to the technical field of concrete foundation construction, in particular to an ultra-large and ultra-thick concrete foundation cooling underground seepage water recycling device which comprises a water collecting pit, a reinforcement cage, a water inlet pipe, a water outlet pipe, a water storage pool and a water suction pump. A water inlet of the water inlet pipe is communicated with a cooling pipe in the concrete foundation, a water outlet of the water inlet pipe is arranged in the reinforcement cage, a water inlet of the water outlet pipe is arranged in the reinforcement cage, and a water outlet of the water outlet pipe is communicated with the cooling pipe in the concrete foundation; the reservoir is communicated with the water inlet pipe through a cooling pipe; the water suction pump communicates with the water outlet pipe through the cooling pipe; the water collecting pit, the cooling pipe, the water inlet pipe, the water outlet pipe and the water storage pool are sequentially communicated through the water suction pump to form a circulating water path, it is guaranteed that water can be continuously drained in the concrete pouring process, and drained water is used for cooling and curing.

The invention discloses a crack-free heat treatment method for additive manufacturing of nickel-based superalloy, and relates to the technical field of heat treatment of superalloy, in particular to a crack-free heat treatment method for additive manufacturing of nickel-based superalloy. The invention aims to solve the technical problem that an existing additive manufacturing nickel-based superalloy is extremely easy to generate intergranular cracks in a subsequent heat treatment temperature rise stage, so that a component is directly scrapped. According to the method, the heating rate of the additive manufacturing nickel-based superalloy at the initial stage of heat treatment is increased to be not lower than 40 DEG C / min, so that precipitation of carbide M23C6 at the grain boundary in the heating process is effectively inhibited, heat treatment cracks are avoided, the method is particularly suitable for IN738LC alloy and other similar precipitation strengthening superalloy, and the method is suitable for industrial production. And an effective scheme is provided for realizing defect-free heat treatment of the additive manufacturing high-temperature alloy component. The rapid heating step can be used as pretreatment and is seamlessly connected with subsequent heat treatment for various purposes, and the application window is wide.

The invention discloses an integral tamping reinforcement construction method for a poor foundation of an industrial factory building terrace. The integral tamping reinforcement construction method comprises the operation procedures of surface cleaning, earthwork backfilling, earthwork compaction, geotextile laying at intervals in a crossed mode through a weaving method, geotextile fixing, earthwork backfilling and geotextile laying circularly and repeatedly till filling soil reaches the designed elevation. The geotechnical cloth is woven and laid at intervals to form a grid shape, so that the integrality is better, and labor and materials are saved; geotextile is laid, so that unfavorable soil texture is greatly improved, and time and cost for replacing good soil or watering, tedding and the like of the soil body are reduced; the grid-shaped geotechnical cloth is laid to improve the integrity of the soil body, the virtual laying thickness of each layer can be properly increased, the layering frequency is reduced, the construction efficiency is improved, and uneven settlement of the soil body caused by construction or environmental factors is reduced; the large-area overall filling earthwork increases the construction efficiency and shortens the construction period.

The utility model relates to the technical field of coal-fired power generation, in particular to a through-wall pipe sealing device capable of absorbing expansion, and aims to solve the problems of poor expansion and structural stress of a through-wall sealing device, prevention of furnace wall leakage and improvement of safety and reliability in operation of a heating surface of a boiler. According to the scheme, the water cooling wall is used for being arranged in the furnace wall to conduct cold water circulation so as to cool the furnace wall, the multiple through-wall pipes penetrate through the position, in the middle of the water cooling wall, of the furnace wall, each through-wall pipe is sleeved with one sleeve, the part, located below the water cooling wall, of each through-wall pipe is fixedly connected with one sleeve, and the multiple sleeves penetrate through one sealing flange plate and are fixedly connected with the sealing flange plate. According to the scheme, expansion displacement and structural stress between the heating surface scattering pipe and the water cooling wall area are eliminated, the situation that the displacement difference and the structural stress cause tension fracture and leakage of the furnace wall is prevented, and the heat dissipation effect of the furnace wall is improved. And the reliability and the safety of the heating surface in wide-load operation are improved.

The invention provides a Burmar local locomotive production load test platform, which is applied to Burmar regions and comprises a water resistance load serving as power consumption of an internal combustion locomotive, a console, a shunt box and a circuit. The water resistance load is groove-shaped; the water resistance load comprises a fixed polar plate, a liftable polar plate, a water tank, a lifting mechanism, a control motor and a fixed connection mechanism. A control motor of the water resistance load adopts variable-frequency speed regulation; a cold water inlet valve and an external interface are arranged at the lower part of the water resistance load; a high-temperature water overflow outlet is formed in the upper part of the water tank; a polar plate thermal imaging over-temperature early warning system is arranged at the high-temperature water overflow water outlet; the console is connected with a liftable polar plate of the water resistance load through a control line; a cable bracket and a busbar bracket are laid on the protection control line of the lifting polar plate; and a connecting line between the console and the diverter box. The invention has the advantages of reasonable structural design, high manufacturing precision, sufficient static and dynamic rigidity, and good use performance under high-temperature and high-humidity conditions.

The utility model belongs to an equipment belt for a ceiling, which is provided with two structural forms and comprises a mounting plate forming an equipment belt main body, a groove is arranged on the upper surface of the mounting plate and divides the mounting plate into two parts, namely an inner plate in the middle and a flash on the outer ring, the inner plate in one structural form is designed to be concave, a plurality of holes are arranged on the upper surface of the inner plate, and the flash is arranged on the outer ring of the inner plate. The upper surface of the flash is a plane or a texture surface, the bottom surface of the mounting plate is provided with a rail groove and a fixed hanger, and an inclined plane or a vertical plane is arranged at the intersection of the flash and the outer side of the groove. The equipment belt is of an integrated structure, is mainly applied to ceilings of storefronts, and solves the problem that equipment installed on the top ceilings can crack under the natural loss of houses for a long time. When an equipment belt is installed, the keel on any ceiling does not need to be broken, the structural stability and installation performance of the ceiling keel are guaranteed, installation is convenient, and the early-stage installation pressure of constructors is reduced.

This utility model discloses a prefabricated slab installation design structure, belonging to the field of building decoration technology. It includes: a partition wall with a structural floor slab at its bottom, and a supporting layer on the structural floor slab; a keel frame, installed on the partition wall via mounting components; and metal dry-hanging components, fixed to the keel frame with screws. The slab composite panel is fixed to the metal dry-hanging components with screws. This utility model connects the slab to an aluminum honeycomb panel and then to the keel frame via metal dry-hanging components. This structure allows the aluminum honeycomb panel to absorb and disperse the expansion stress of the slab during thermal expansion and contraction, providing a "buffer zone" and preventing cracking or deformation due to direct rigid constraint. Similarly, in cold seasons, when the slab contracts, the aluminum honeycomb panel adjusts accordingly to maintain the overall stability of the structure, further enhancing its adaptability to thermal expansion and contraction.

The present invention provides a prefabricated spliced ​​plate type ballastless track structure and a construction method thereof, belonging to the technical field of railway tracks, comprising: a supporting layer, a ballast plate and two rails, wherein limited bosses are arranged at intervals on the supporting layer; the ballast plate comprises a filling layer and a prefabricated part arranged on the supporting layer in sequence from bottom to top; the prefabricated part comprises two prefabricated plates symmetrically arranged on both sides of the filling layer in the width direction and two rows of rail bearing platforms arranged on the two prefabricated plates, and an isolation wall is formed along the center line of the filling layer to isolate the two prefabricated plates, and the two prefabricated plates are connected as a whole by steel bars penetrating the isolation wall; the two rails are respectively arranged on the two rows of rail bearing platforms. The present invention has the advantages of high availability in tunnels and is suitable for the construction of tunnel railways and subway projects; it has the advantages of high smoothness, replaceable and maintainable ballast plates, controllable filling layer quality and low cost, and also has the advantages of low risk of cracks and separation on the contact surface of new and old concrete.

The invention belongs to the technical field of tunnel supporting, discloses a variable cross-section high-strength anchoring supporting method for tunnel construction, and aims to solve the problems of long construction period and high cost caused by large use amount of tunnel surrounding rock anchor rods and easy generation of cracks caused by concentrated acting force of a single anchor rod on tunnel surrounding rock. The method comprises the following steps: (1) after tunnel surrounding rock is excavated, spraying concrete to form a first concrete protective layer; (2) erecting a steel arch; (3) laying a reinforcing mesh; (4) anchor rod construction; (5) after anchor rod construction is completed, concrete is sprayed again to form a second concrete protection layer; and then secondary lining is constructed according to design requirements. The combined acting force of the single anchor rod and the tunnel surrounding rock can be improved, the number of the tunnel surrounding rock anchor rods is reduced, and the purposes of reducing the construction period and reducing the grouting amount are achieved; and meanwhile, the crack problem caused by overlarge local pressure intensity of the tunnel surrounding rock can be effectively prevented.

The utility model discloses convenient photovoltaic energy supply equipment, which comprises a shell, a photovoltaic panel and a storage battery are respectively arranged in the shell, an interface is fixedly connected below the front surface of the shell, the convenient photovoltaic energy supply equipment further comprises a storage device, and the storage device is arranged on the side wall of the shell; the protection device is arranged outside the shell; and the supporting device is arranged below the photovoltaic panel. The utility model relates to the technical field of photovoltaic energy, and according to the convenient photovoltaic energy supply equipment, through cooperation of the box body, the worm, the hand wheel, the worm gear, the stand column, the connecting plate, the frame body, the guide part and the auxiliary part, the storage of the photovoltaic panel is realized, and the problem that most of the photovoltaic panels on the photovoltaic energy supply equipment are fixed on the equipment, so that the equipment is inconvenient to use is solved. The problems that the overall size of the equipment is large due to the fact that the photovoltaic panel cannot be stored, the overall equipment is heavy when being carried, and the convenience of the photovoltaic energy supply equipment is reduced in the prior art are solved.

The utility model provides an anti-tearing outer tire of a cart tire. Comprising a hub, an outer tire is arranged on the edge of the outer side of the hub, and an anti-tearing assembly is arranged on the surface of the outer tire; a plurality of inner circular frames are arranged on the inner side of the outer tire, and a plurality of positioning bolts are in threaded connection with the inner sides of the inner circular frames. According to the anti-tearing cart tire cover, all parts of the anti-tearing cart tire cover are arranged in a matched mode, so that in the using process of the tire cover, the friction force generated when the tire cover makes contact with the ground can be increased through the grooves and the anti-skid patterns, the tire cover can be prevented from slipping, and the service life of the tire cover is prolonged. By using a first reinforcing block, a second reinforcing block and a cam block, the overall durability and stability can be guaranteed, then the problem that the surface of an outer tire cracks due to the gravity borne by the outer tire and the use environment when the tire rotates for a long time is solved, and the service life of the trolley is further prolonged.

This invention belongs to the field of ceramic materials and processing technology, and relates to a stable glazed ceramic hot-bent slab and its preparation method. The invention includes a green body and a glaze. The green body adopts a multi-component composite flux system, including 20-25 parts quartz, 18-22 parts calcined kaolin, 18-22 parts potassium feldspar, 22-25 parts sodium feldspar, 8-12 parts wollastonite, 2-3 parts magnesium oxide, 0.2-0.5 parts iron oxide, and 0.1-0.3 parts titanium dioxide. The glaze includes 50-70 parts frit glaze, 0.5-5 parts coloring oxide, 2-6 parts alumina, and 1-4 parts zinc oxide. Through innovative green body and glaze formulations and optimized secondary hot-bending heat treatment processes, this invention achieves a hot-bending temperature ≤1150℃ and a holding time ≤60min. The resulting ceramic hot-bent slab has advantages such as high forming accuracy, no surface cracks, good strength retention, small glaze color difference, and low energy consumption, and has good prospects for industrial application.

The present invention relates to the technical field of building structural components prepared with lightweight concrete, and specifically to a building lightweight structural component and a splicing method thereof and a splicing component, comprising a component body, one end of the component body used for splicing protrudes outward to form a splicing portion, the width of the splicing portion is smaller than the width of the component body, so that the ends of the component body form a first step on both sides of the splicing portion in the width direction; the end face of the splicing portion away from the component body is a plane, and the plane serves as the splicing surface of the lightweight structural component. The lightweight structural component of the present invention adopts convex-convex splicing during splicing, and splicing materials are used to close the gap at the joint during the splicing process, which solves the problem of cracks at the joint of the lightweight structural component caused by the existing convex-concave splicing method.

The offshore photovoltaic structure combined with the jacket comprises a jacket foundation, the jacket foundation is of a space truss structure composed of a plurality of pile bodies, side face cross connecting rods and transverse connecting rods, and the side face cross connecting rods are fixedly connected between every two pile bodies adjacent in the circumferential direction. Transverse connecting rods are fixedly connected to the two ends of the side cross connecting rods, a plurality of supporting rods are fixedly connected to the pile body, a supporting frame is fixedly connected to the tops of the supporting rods, a plurality of purlines are fixed to the supporting frame, the purlines are used for bearing photovoltaic modules, the main structure can be prefabricated ashore, less welding on the sea is achieved, and the offshore operation time is shortened; the jacket foundation is adopted to replace a traditional pile foundation, and the problem that a support and assemblies are cracked due to differential settlement of piles is solved.

The utility model provides a construction structure for controlling cracks of an ALC plate, and belongs to the field of building construction. A plurality of ALC plates are arranged between the ground and the building beam, a plurality of constructional columns are fixedly arranged between the ground and the building beam, the two sides of the constructional columns abut against the ALC plates, and a plurality of positioning assemblies are arranged between the constructional columns and the ALC plates on the two sides. A door buttress is arranged between the ground and the building beam. The constructional column and the door buttress are arranged, the ALC plate can be well supported, the phenomenon that weak positions such as the wall length larger than 6 m and a door opening crack is effectively avoided, the fixing assembly is further arranged, the plug pin can be mounted and dismounted, the constructional column can be conveniently transported, the lengthening piece is further arranged, and the fixing assembly can be used for fixing the constructional column. The requirements of doors and windows with different heights and different floor heights can be met, and the practicability is improved.

The invention provides a device and method for reinforcing a fan foundation through electric heating prestress rings, the device comprises a newly-added reinforced concrete body and a plurality of electric heating prestress rings, and the newly-added reinforced concrete body is arranged on an original wind power concrete foundation and arranged on the periphery of an original foundation ring structure; the multiple electric heating prestress rings are annularly arranged on the periphery of the original foundation ring structure and embedded in the newly-added reinforced concrete body. According to the method, the bond stress between the newly-poured concrete body and the original concrete foundation can be effectively guaranteed, and the reinforcing effect of the newly-poured concrete body is guaranteed; meanwhile, the bond stress between an original concrete foundation and an original foundation ring structure can be improved, and the reinforcing effect is improved; and concrete only needs to be poured once, so that the construction efficiency is high.

This utility model discloses a modular lifting stage, including a base and a lifting mechanism. The lifting mechanism includes fixed plates, adjusting seats, mounting seats, and drive rods. The fixed plates are respectively disposed on the left and right sides of the upper end of the base. Adjusting seats are respectively disposed on the front and rear sides between the opposite inner sides of the two fixed plates. Drive rods are rotatably connected inside the four sets of adjusting seats. A stage panel is disposed on the upper end of the base. Mounting seats are respectively disposed on the front and rear sides of the lower end of the stage panel. The upper ends of the four drive rods are rotatably connected to the lower ends of the vertically adjacent mounting seats. A microcontroller is disposed on the upper end of the base. The input end of the microcontroller is electrically connected to an external power supply. The lifting mechanism also includes a crossbar, a connecting plate, and a bidirectional screw. This modular lifting stage optimizes the driving method, enabling more uniform load distribution and providing more stable lifting, thus solving the problem of stage panel cracks or damage caused by stress concentration.

The invention relates to the technical field of construction based on a pushing support, in particular to a construction method based on a pushing support, which comprises the following steps: designing a pushing support structure, and installing a slideway at the top end of the pushing support after welding is completed; reinforcing steel bar machining and binding are conducted on the formwork according to the drawing, and concrete is poured into the formwork through a layered pouring method after binding; the horizontal jack is started, the prefabricated sections are pushed forwards step by step, and the steps are repeated till all the prefabricated sections are pushed to the designed positions; beam falling preparation work is carried out, the jack is started to slowly fall the bridge, and the bridge is gradually transferred to the designed support from the pushing support; the pushing support adopts a segmented prefabrication and continuous pushing mode, the construction period is greatly shortened, the construction efficiency is improved, meanwhile, through continuous pushing, the overall performance of a bridge is improved, the construction risk is reduced, the pouring complexity is reduced through the prefabricated pedestal and the formwork, the construction safety is improved, and environment protection is facilitated.