63results about How to "Improve structural integrity" patented technology

The invention discloses a paving device for garden pavement bricks, relates to the field of garden pavement paving, and solves the problems that an existing paving device for garden pavement bricks is low in operation efficiency and difficult to fully fill brick joints when filling the brick joints, and the paving device comprises a vehicle body, a loading hopper, a paving mechanism, a blocking mechanism and a recycling mechanism, the laying mechanism comprises a rotating cylinder, a driving cylinder and bristles, the recycling mechanism comprises a conveying belt, sandy soil in the loading hopper is evenly output to the upper sides of bricks through the laying mechanism, meanwhile, in the moving process of the vehicle body, the rotating cylinder is linked to rotate, horizontal reciprocating swing is conducted, and the sandy soil is fully stuffed into brick joints through the bristles for filling; in the moving process of the vehicle body, sandy soil at the bottom is continuously pushed to the bottom position of the vehicle body through linkage of the blocking mechanism, loss of the sandy soil around the vehicle body is reduced, redundant sandy soil is recycled into the loading hopper through the conveying belt through the recycling mechanism to be recycled, and the utilization rate of raw materials is increased.

The invention discloses a fabricated steel-ultra-high-performance concrete combined bridge deck structure with shear grooves and a construction method of the fabricated steel-ultra-high-performance concrete combined bridge deck structure, and relates to the technical field of bridge deck constructions.The bridge deck structure comprises a lower-layer steel bridge deck, an upper-layer prefabricated ultra-high-performance concrete bridge deck and shear connectors; the prefabricated ultra-high performance concrete bridge deck is provided with a shear groove, an embedded connecting piece penetrates through a groove opening of the shear groove in the transverse bridge direction, the two ends of the embedded connecting piece are embedded in the prefabricated ultra-high performance concrete bridge deck, the top of the shear connecting piece is fixed to the embedded connecting piece in a lap joint mode, and the bottom of the shear connecting piece is fixed to the steel bridge deck. A post-pouring layer is arranged between the prefabricated ultra-high performance concrete bridge deck and the steel bridge deck. The bridge deck slab is good in structural integrity, excellent in crack resistance and reasonable in stress, the interface connection problem of the prefabricated ultra-high-performance concrete bridge deck slab and the steel bridge deck slab can be effectively solved, the bearing capacity of a combined bridge deck system is improved, and the service life of the combined bridge deck system is prolonged.

The invention relates to the technical field of shock insulation supports, and provides a building shock insulation support connecting joint and a construction method thereof. An upper fixing plate is fixed to an upper support plate and used for bearing a building structure, a lower fixing plate is arranged on a foundation, and a lower support plate is fixed to the lower fixing plate; the sliding block is arranged between the upper support plate and the lower support plate in a sliding mode, the shape of the upper surface of the sliding block is matched with the shape of the inner side of the upper support plate, the shape of the lower surface of the sliding block is matched with the shape of the inner side of the lower support plate, the inner side of the upper support plate abuts against the upper surface of the sliding block, and the inner side of the lower support plate abuts against the lower surface of the sliding block. The sliding space is formed between the upper support plate and the lower support plate, the sliding block slides in the sliding space when an earthquake occurs, so that the upper support plate and the lower support plate are staggered, and the problems that a rubber shock insulation support is not suitable for a large building or a heavy-load structure, and the shock insulation and absorption effect on impact force in the horizontal direction is poor are solved.

The invention discloses a micro-vibration control construction process for a grating vibration isolation foundation, and relates to the technical field of building construction. Comprising the following steps: S1, measuring and positioning: measuring and releasing sideline control piles of each shock insulation pier and a sand-gravel cushion layer; s2, construction of a graded gravel cushion layer; s3, compaction coefficient detection; s4, paying-off is conducted on the bottoms of the shock insulation piers, wherein the sideline control point of each shock insulation pier is measured and paid off; s5, side formwork installation and steel bar binding, wherein the distance between the vibration isolation pier and the equipment walkway foundation is 10 cm, a foam polyethylene plate with the thickness of 10 cm is adopted as the side formwork, and the side formwork and the steel bars are installed, bound and formed together; s6, mass concrete pouring and temperature control, wherein layered pushing type continuous pouring is adopted, and the thickness of each layer does not exceed 50 cm; s7, concrete curing; and S8, buffer seam treatment. The compaction graded gravel cushion layer is arranged as a vibration isolation filtering layer, and the large-scale independent vibration isolation pier body is combined, so that double isolation of earthquake dynamic response and environmental vibration is effectively realized, and stable operation of a precise instrument is ensured.

The application discloses a MAX phase reinforced three-dimensional network tin-based lead-free solder and a preparation method thereof, and belongs to the technical field of lead-free solder. The MAX phase reinforced three-dimensional network tin-based lead-free solder is characterized in that the MAX phase reinforcing phase is distributed in the form of a three-dimensional continuous network skeleton at the grain boundary of a tin-based lead-free solder matrix; and the MAX phase reinforcing phase forms a continuous network penetrating through the whole tin-based lead-free solder matrix. The application also discloses an application of the MAX phase reinforced three-dimensional network tin-based lead-free solder in a high-temperature, high-load and high-frequency vibration scene. Through process innovation and performance optimization, the application aims to finally prepare a "high-strength, high-plasticity and high-temperature stability" tin-based three-dimensional network composite solder, solves the problem that a traditional tin-based single-component lead-free solder is prone to deformation and cracking due to thermal stress and mechanical load, improves the reliability of electronic packaging, and expands the application range of the tin-based lead-free solder in high-demand fields.

The utility model provides a kind of skeleton assembly, stator assembly, motor, the skeleton assembly among them includes insulating skeleton and wiring connector, insulating skeleton includes first end part, first end part is formed with first slot, wiring connector includes plug-in part, and it is formed with protrusion on plug-in part, wiring connector is inserted in first slot by plug-in part, protrusion is in first slot, and protrusion abuts the groove wall of first slot.According to the utility model, wiring connector is assembled on insulating skeleton by the moderate means of insertion in the first slot of insulating skeleton, instead of using equipment to force into, so it can avoid insulating skeleton to break due to external force, thereby improve the convenience and stability of assembly, so that the structure of skeleton assembly is good in integrity, high in strength.Simultaneously, the protrusion on plug-in part abuts the groove wall of first slot, equivalent to the interference fit of insulating skeleton and first slot, thereby also enhance the assembly stability of wiring connector on insulating skeleton.

The utility model provides a spare tire mounting seat which comprises a mounting seat body which is integrally formed, the mounting seat body is provided with a connecting face and a limiting face which are spaced from each other, the connecting face is connected with a vehicle body mounting position, the limiting face abuts against a spare tire hub, and the limiting face is provided with a fastener suitable for fixing the spare tire hub. A supporting enclosure bulkhead is formed on the portion, located between the connecting face and the limiting face, of the installation base body, and reinforcing supporting ribs are arranged on the inner side wall face and / or the outer side wall face of the supporting enclosure bulkhead. According to the spare tire mounting seat provided by the utility model, the integrally-formed mounting seat body can omit connecting welding seams among parts, so that the situation that the welding seams are broken due to stress concentration is avoided, the structural strength of the mounting seat body is improved, and weight reduction is facilitated; in addition, reinforcing supporting ribs are arranged on the inner side wall face and / or the outer side wall face of the supporting enclosure bulkhead, the structural strength of the installation base body can be further improved, the risk of stress fracture is reduced, and therefore the installation reliability of the spare tire is improved.

This utility model discloses an automatic centering ball-distributing oscillator structure, belonging to the field of bearing assembly. The automatic centering ball-distributing oscillator structure includes an upper connecting seat, with a lower connecting seat at the bottom of the upper connecting seat. The upper and lower connecting seats are interconnected by a centering structure. This utility model solves the problems of traditional oscillating ball-distributing mechanisms, where a single soft rubber body directly connects to the ball distributor for rotational oscillation, or directly connects to an object for rotational oscillation. These mechanisms are prone to breakage of the connecting rubber body, resulting in a short service life, frequent replacement of parts, low production efficiency, and increased operating costs. More critically, when using a single soft rubber body structure, the concentricity of the oscillating component is poor, preventing automatic centering. When used in bearing production equipment, the poor concentricity of the oscillating component frequently causes it to bump against the bearing edge. This utility model patent solves all these problems, resulting in significant economic benefits.

The utility model relates to the technical field of house board material, especially a tenon and mortise structure board of preventing deformation, including board body, the T type sliding slot is seted up in the board body side, its other side is fixedly connected with the T type sliding block of sliding in the T type sliding slot, the spring hole is seted up in the T type sliding slot inner wall, the compression spring is fixedly connected in the spring hole, the compression spring end is fixedly connected with the plug -in rod of sliding in the spring hole, the fixed hole is seted up on the T type sliding block. The utility model discloses a piece of board body right side T type sliding block is inserted into the T type sliding slot of initial board body left side, can fast complete two board body tenon and mortise connection, and in the process of plugging, T type sliding block extrusion plug -in rod, make it retract into spring hole and compress compression spring, when the fixed hole on T type sliding block and the position of plug -in rod coincide, compression spring resets under the action of self elasticity, thereby promotes plug -in rod and inserts fixed hole, completes two board body fixing, avoids two to separate.

The application relates to a top structure of a steel pipe concrete composite tower, the steel pipe concrete composite tower and a bridge, the top structure comprising a stiff skeleton column and a steel box beam, the steel box beam comprising a bottom steel plate and a top steel plate, the main steel pipe of the stiff skeleton column being connected to the bottom of the bottom steel plate, longitudinal webs and transverse webs being connected between the top steel plate and the bottom steel plate, first through holes being arranged on the bottom steel plate, the top steel plate, the longitudinal webs and the transverse webs respectively, first steel bars being arranged in the first through holes to form PBL shear keys, and the top region of the stiff skeleton column and the steel box beam being wrapped with concrete. The steel box beam, the main steel pipe and the wrapped concrete are connected by the PBL shear keys to form an integral whole, the huge pressure at the cable saddle can be transmitted to the stiff skeleton column, the steel box beam is fixedly connected with the stiff skeleton column, the steel box beam, the main steel pipe and the wrapped concrete work cooperatively, the structure has good integrity, the force transmission of the node is clear, the top structure has simple structure, convenient operation, short construction period and good effect.

The utility model discloses a multi-frequency heat pump through shaft self-water-feeding structure, which belongs to the field of multi-frequency heat pumps and comprises a heat pump body, an upper drain plate, a rotor outer cover and an upper cover plate are sequentially and fixedly mounted at the top of a shell, an upper valve plate is fixedly mounted at the top of the upper cover plate, and a lower valve plate is fixedly mounted at the bottom of the shell. An upper valve plate is fixedly installed in the shell, a water outlet tee joint is fixedly installed at the top of the upper valve plate, a lower drainage plate and a lower base are sequentially and fixedly installed at the bottom of the shell, and a water inlet connector is fixedly installed on one side of the lower base. The impeller rotating at a high speed actively pumps water upwards through the overflow groove, the first communication opening and the water inlet through hole, the efficiency that the water climbs upwards after entering the impeller cavity is improved, the water can penetrate through the interior of the shell more easily and reach the energy adding rotor, the contact efficiency of the water and the energy adding rotor is improved, and the temperature rising efficiency of the water is improved.

This utility model discloses an assembled design structure for irregularly shaped aluminum plates with a ring-shaped, stacked configuration, comprising: a base plate, an upper ring-shaped aluminum plate, and a lower ring-shaped aluminum plate, which are respectively suspended from the base layer of a wall by lifting rods; an upper positioning seat, which is arranged at the bottom edge of the base plate and the upper ring-shaped aluminum plate, with the top of a connector slidably connected to a first oblong hole extending in the x-axis direction on the upper positioning seat, and a first cap abutting against the end face of the upper positioning seat; a lower positioning seat, which is arranged on the top surface of the upper and lower ring-shaped aluminum plates, with the bottom of a connector slidably connected to a second oblong hole extending in the y-axis direction on the lower positioning seat, and a second cap abutting against the end face of the lower positioning seat; and several lamps. This utility model can solve the problems of existing irregularly shaped aluminum plate structures, such as difficulty in achieving efficient, safe, convenient, and detachable assembly, and insufficient structural integrity, structural strength, and seismic performance.

The invention discloses a steam-water separation device for an air compressor, relates to the field of steam-water separation devices for air compressors, and solves the problems that an existing steam-water separation device for an air compressor is difficult to realize self-cleaning in a separation process when in use, so that the separation is not efficient enough. Comprising a shell, a conveying pipe, an exhaust pipe, a separation mechanism, a cleaning mechanism and a condensation mechanism, the separation mechanism comprises a filter screen ring, a driving wheel and a guide wheel, and the cleaning mechanism comprises a partition plate and an electric heating piece. A set amount of gas penetrates through the partition plate through the cleaning mechanism, is heated by the electric heating piece and then is reversely blown to the side face of the filter screen ring, the filter screen ring is dried and cleaned, waste gas is exhausted through the exhaust pipe, and water vapor in the gas filtered by the filter screen ring is condensed and output through the condensation mechanism.

This invention discloses a symmetrical non-rotational composite material oblique mesh structure suitable for automated molding, comprising an upper frame, a lower frame, and bidirectional helical ribs; the upper frame, lower frame, and bidirectional helical ribs are integrally molded structures, and the structural materials used for the upper frame, lower frame, and bidirectional helical ribs are composite materials; the bidirectional helical ribs include two mutually symmetrical ribs, and the center line of the outer contour surface of each rib is a helix with equal pitch, equal helix angle, or geodesic. This invention further discloses methods for determining the center line of ribs used in various typical symmetrical non-rotational structures applied in aerospace engineering. The oblique mesh structure of this invention is rationally designed, lightweight, and suitable for automated mass production.

The application discloses a kind of semi-active shock absorber, including cylinder body assembly and the base fixed in the rear end of cylinder body assembly, the cylinder body assembly includes pressure cylinder, intermediate cylinder and oil storage cylinder, piston assembly is arranged in the sliding seal of pressure cylinder, and pressure cylinder is divided into pressure cylinder upper cavity and pressure cylinder lower cavity, piston rod is arranged in the pressure cylinder upper cavity, the front end of piston rod extends to the outside of cylinder body assembly, and rear end is fixedly connected with piston assembly, valve group and oil circuit system are arranged on the base, the front end of intermediate cylinder is communicated with pressure cylinder upper cavity, and rear end is communicated with pressure cylinder lower cavity and oil storage cylinder by oil circuit system, and the valve group includes first high-speed on-off valve, second high-speed on-off valve, manual overflow valve, electric control proportional valve and third high-speed on-off valve which are distributed along the circumferential direction and surround the outer circumferential surface of cylinder body assembly.The application is integrally arranged with all control valves and shock absorber, and installation space is reduced, which can be interchangeably installed and used with passive shock absorber, without changing vehicle bogie structure.

The utility model provides a front floor reinforcing structure and a vehicle, which comprises a front floor body, a rear floor front cross beam reinforcing plate, a front row seat rear mounting beam and a floor reinforcing plate, the rear floor front cross beam reinforcing plate is connected to the rear side edge of the front floor body, and the front floor body comprises a front floor middle channel. The front-row seat rear mounting beam and the floor reinforcing plate are connected to the upper portion of the front floor body, the front-row seat rear mounting beam is connected with the front floor middle channel, and the floor reinforcing plate is located between the front-row seat rear mounting beam and the rear floor front beam reinforcing plate. According to the front floor reinforcing structure, the front floor middle channel, the front row seat rear mounting beam, the floor reinforcing plate and the rear floor front cross beam reinforcing plate are enclosed to form the frame structure, so that the structural integrity of the front floor is enhanced, the structural rigidity and strength of the front floor are improved, and the deformation resistance of the front floor is enhanced; deformation caused by manual treading is avoided, and safe use of the under-vehicle battery pack is guaranteed.

The utility model relates to the technical field of steel reinforcement cage, concretely to the whole structure of variable diameter steel reinforcement cage, including concrete cushion layer, be provided with screw thread reinforcement in concrete cushion layer, the bottom plate body is provided with screw thread reinforcement above concrete cushion layer, the anchor is connected with the screw thread reinforcement upper end, be provided with spiral stirrup between anchor and bottom plate body, be provided with multiple groups of bent reinforcement on bottom plate body, the stretchable part is provided with screw thread reinforcement below concrete cushion layer, the utility model, screw thread reinforcement, bottom plate body, bent reinforcement and spiral stirrup etc. jointly constitute the stable steel reinforcement cage structure, screw thread reinforcement as main force component, bear the tension and pressure, bottom plate body positioning and supporting split type variable diameter steel reinforcement cage, ensure its correct position in concrete member, bent reinforcement resists shear force, strengthens the structural integrity, spiral stirrup restricts concrete, improves its compressive strength and deformation capacity, makes the structure more stable, can better bear various loads.

This application belongs to the technical field of flame-retardant intumescent thermal insulation materials, specifically providing an inorganic intumescent thermal insulation fireproof coating and its preparation method. The inorganic intumescent thermal insulation fireproof coating comprises the following components: potassium silicate solution, aluminum dihydrogen phosphate, porous composite filler, melamine, pentaerythritol, aluminum hydroxide, glass powder, expandable graphite, mullite fiber, BYK-025 defoamer, sodium tripolyphosphate dispersant, and hydroxypropyl methylcellulose thickener. The inorganic intumescent thermal insulation fireproof coating obtained by this application exhibits excellent bonding strength, high-temperature structural stability, and controllable expansion, making it suitable for fire protection in scenarios such as new energy battery boxes and steel structure buildings, and capable of meeting stringent fire protection requirements.

The invention relates to a multiphase composite flame-retardant waterproof coiled material and a preparation method thereof. The flame-retardant waterproof coiled material comprises an upper waterproof layer, a flame-retardant middle layer and a lower waterproof layer which are sequentially laminated and compounded from top to bottom, the upper waterproof layer and the lower waterproof layer are thermoplastic polymer layers; the flame-retardant middle layer comprises a base material layer, at least one first patterned flame-retardant layer combined on the upper surface of the base material layer and / or at least one second patterned flame-retardant layer combined on the lower surface of the base material layer, and a thermoplastic protective adhesive layer covering the surfaces of the patterned flame-retardant layers and the surface of the base material layer; the horizontal shape of the patterned flame-retardant layer is a two-dimensional area shape and corresponds to the plane outline of at least one fire risk area preset on the target laying surface.

The invention discloses a shaft combined construction method, and relates to the technical field of shaft construction. Comprising the following steps that firstly, construction preparation is conducted, a raise boring machine is selected, and well mouth positioning and raise boring machine leveling are conducted; step 2, guide hole construction: adopting graded drilling to form a guide hole penetrating through the upper and lower horizontal planes of the vertical shaft; 3, expanding excavation construction is carried out, slope expanding, drilling and blasting operation is carried out, and vertical shaft full-section zoning and layering expanding excavation is carried out from top to bottom with the guide hole as the center; fourthly, primary supporting is carried out, and supporting is synchronously carried out on the expanding excavation face when one layer is expanded and excavated in the zoning and layering expanding excavation process; and 5, secondary supporting is conducted, specifically, after expanding excavation and primary supporting construction are conducted to the bottom of the vertical shaft, secondary supporting is conducted on the wall face of the vertical shaft from bottom to top through the slip form. The mode that the raise boring machine guide hole and manual expanding excavation are combined is adopted, the problems of ventilation, drainage and deslagging existing in the manual expanding excavation process are solved in advance through the guide hole, the technology of secondary lining from bottom to top of the slip form is combined, and the time of the supporting procedure is greatly shortened.

The invention relates to the technical field of piezoelectric material preparation, and discloses stacked high-voltage-resistant piezoelectric ceramic and a manufacturing method thereof. The stack type high-voltage-resistant piezoelectric ceramic comprises an insulating sheet, a piezoelectric ceramic sheet, an electrode, an electric lead and an insulating layer. The piezoelectric ceramic pieces are stacked between the two insulating pieces, and the positive electrode faces and the negative electrode faces of every two adjacent piezoelectric ceramic pieces are arranged in opposite directions. The electrodes include a positive electrode and a negative electrode. The electrode plates are connected in series through the connecting beams. The electrodes and the piezoelectric ceramic pieces are alternately stacked and bonded. And the two electric leads are respectively connected with the positive electrode and the negative electrode. The insulating layer wraps the insulating sheets, the piezoelectric ceramic sheets and the electrodes and fills the arc-shaped cavities connected with the cross beams. The invention has the advantages of same volume, low electrostatic capacity, better dynamic performance under the condition of preloading force and high voltage resistance, so that the invention can be normally used in special environments such as high voltage, high humidity and the like. The manufacturing process is simple, the efficiency is high, and the product has the characteristics of stability and high pressure resistance.

The present application relates to a multi-material composite parallel layered bead structure and design method, and belongs to the field of tire structure and manufacturing method thereof. The cross-sectional shape of the bead is hexagonal, the bead is composed of multiple composite layers stacked along the radial direction of the cross-section of the bead, the multiple composite layers contain at least two material layers with different elastic moduli, and the elastic modulus of each material layer is gradiently distributed along the radial direction of the cross-section of the bead; the laying direction of each material layer is parallel to the bottom side of the hexagonal cross-section, forming a parallel composite layered structure. The present application gradiently lays and arranges multiple materials with different elastic moduli along the radial direction of the cross-section of the bead, actively adjusts the stress proportion of each load-bearing layer, promotes the balanced distribution of the hoop tension in the full cross-section range, and thus improves the fatigue resistance quality and service life while maintaining the overall load-bearing capacity of the bead.

The utility model discloses a kind of precast concrete windowsill coping components, including component body, the component body includes integrally-formed flat section and bevel section, the component body inside pre-buried 4 longitudinal reinforcement, longitudinal reinforcement one end protrudes component body from bevel section and exposes as lap section;So bevel section sets up two length-through waterproof groove.The technical effect and advantage of the utility model: construction efficiency improves: precast component is installed with masonry synchronously, eliminates maintenance waiting period, and windowsill construction cycle is shortened to 1 day;Anti-cracking performance is excellent: bevel occlusion structure makes joint place crack resistance strength improve;Waterproof performance is reliable: double waterproof groove makes node leakage rate reduce;Structure integrality is good: pre-buried reinforcement and cast-in-place section form whole;The innovation of the present application is successfully cracked traditional windowsill construction quality common fault through the organic combination of precast component standardization production and field assembly construction, provides new industrialization solution for masonry structure engineering.

The application discloses a polymer modified asphalt and application thereof in a high-toughness stress absorbing layer of anti-fouling non-sticky wheel, relates to the technical field of pavement structure layer, and the polymer modified asphalt comprises the following components in parts by weight: 70-75 parts of base asphalt, 13-15 parts of high molecular polymer, 7-9 parts of organic silicon polyurea, 4-5 parts of anti-fouling agent and 1-3 parts of antioxidant; the stress absorbing layer comprises the following components in percentage by weight: 7.0-8.5% of polymer modified asphalt, 85-90% of aggregate, 6-8% of filler and 0.1-0.3% of toughening agent. The stress absorbing layer solves the problems of the existing stress absorbing layer, such as difficult cleaning of dust and flying dust after pollution, easy damage in the use process and poor toughness.

This utility model discloses a road surface widening and reinforcement structure, relating to the field of highway construction technology. It includes a vertical stepped structure, a longitudinal cast-in-place layer, a longitudinal cast-in-place top layer, and crack-resistant components. The vertical stepped structure is formed by cutting the old road surface base layer with a longitudinal cutting machine to create a stepped overlapping interface, with the cutting depth consistent with the thickness of the corresponding structural layer. The longitudinal cast-in-place layer is placed at the joint between the old and new road surfaces in the cement-stabilized crushed stone lower base layer, and the longitudinal cast-in-place top layer is placed at the joint of the upper base layer with its top surface flush. The crack-resistant components include ribbed steel bars transversely embedded in the middle of the upper base layer, crack-resistant wire mesh laid at the bottom of the lower base layer, and crack-resistant tape covering the joint of the upper base layer. This utility model achieves a seamless connection between the old and new road surfaces, forming an integrated load-bearing system and significantly improving the road surface's load transfer capacity and deformation resistance.

The invention discloses a polymorphic fiber reinforced resin-based composite structure, and belongs to the technical field of fiber reinforced composites, the polymorphic fiber reinforced resin-based composite structure comprises a polymorphic reinforced fiber system and a modified resin composition, the polymorphic reinforced fiber system comprises continuous reinforced fibers and gradient length discontinuous fibers, modified layers are arranged on the surfaces of the continuous reinforced fibers and the gradient length discontinuous fibers; the modified resin composition shows a single glass transition temperature before and after being heated at 400 DEG C for 1 hour, and the performance retention rate meets preset requirements after being aged at 300 DEG C for 1000 hours; through the synergistic effect of the fiber surface modification layer and the epoxy group modified polyarylene sulfide compatilizer, the interface bonding effect between the fiber and resin and between fibers in different forms is effectively enhanced; and by compounding the anti-aging agent, the degradation speed of the resin in a high-temperature environment can be delayed, the composite material is ensured to keep stable performance under a long-term high-temperature working condition, and the use requirements in the high-temperature environment are met.

The graphene battery pack comprises a shell, a plurality of battery units and a circulating fan, the shell comprises a bottom plate, an enclosure frame and a cover plate provided with a heat dissipation part, the bottom plate is provided with a mounting groove with an air guide groove in the peripheral wall, the air guide groove is connected with a limiting plate in an inserted mode, and the upper end of the limiting plate is connected with a limiting plate of the cover plate in an inserted mode; a flow guide hole communicated with the air guide groove and penetrating through the top face of the limiting plate is formed in the limiting plate, a heat dissipation cavity communicated with the flow guide hole is formed in the cover plate, an air return opening is formed in the upper end of the shell, an inlet of the circulating fan is communicated with the heat dissipation cavity, and an outlet of the circulating fan is in butt joint with the air return opening. The graphene battery pack has the advantages that heat dissipation of the side faces of the battery units can be completed, the heat dissipation capacity of the graphene battery pack is guaranteed, the limiting plates can also support the graphene battery pack, the strength of the graphene battery pack is improved, and flow guide holes are formed in the limiting plates, namely, the limiting plates are of internal hollow structures; and the limiting plates can be elastically compressed inwards during thermal expansion of the battery units, so that the structural strength of the graphene battery pack is flexibly enhanced.

This utility model relates to the field of bridge construction technology in water conservancy engineering, and discloses a hollow precast slab for a river sluice gate traffic bridge. It includes an upper slab with a support mechanism fixedly connected internally. Multiple ribs are fixedly connected to the bottom of the upper slab, and an assembly mechanism is fixedly connected to the bottom of each rib. The assembly mechanism includes a lower slab, the top of which is fixedly connected to the bottom of the ribs. Multiple protrusions are fixedly connected to one side of the lower slab, and multiple grooves are formed on the other side. Two sealing strips are fixedly connected to the opposite sides of two ribs. In this utility model, the protrusions and grooves are precisely engaged through a mortise and tenon joint, and then concrete is filled at the joint. The adhesive force of the concrete, combined with the mechanical interlocking force of the mortise and tenon structure, tightly bonds the slab into a whole, improving the shear strength of the joint.

The utility model discloses a durable steel ladle cover which comprises a cover body, the cover body is of a cylindrical structure with an opening in the lower end, an inner flange is arranged at the opening end of the cover body, transverse and longitudinal separation beams are arranged in the cover body and divide the inner space of the cover body into a plurality of filling areas, through holes are formed in the transverse and longitudinal separation beams, hexsteel is arranged in the filling areas, and the opening end of the cover body is provided with a through hole. A plurality of anchoring parts extending towards the opening side are arranged on the inner top face of the cover body, the hexsteel is fixed in the filling area through the anchoring parts, a heat insulation layer is arranged between the inner top face of the cover body and the transverse and longitudinal separation beams, a permanent layer is arranged in the filling area, and a working layer is arranged on the surface of the permanent layer. The interior of the cover body is divided into a plurality of filling areas through the transverse and longitudinal separation beams, the adjacent filling areas are physically connected through the through holes, the hexsteel serves as a framework of refractory materials and is fixed in the filling areas through the anchoring parts, and a composite layered structure of the heat insulation layer, the permanent layer and the working layer is adopted. The problems that a traditional ladle cover is prone to cracking, short in service life, high in maintenance cost and the like can be effectively solved.