50results about How to "Avoid peel damage" patented technology

The invention belongs to the technical field of concrete reinforcement and relates to a method for reinforcing concrete with a fibrage net and a cement-based material. The method is to pour the fibrage net the total thickness of which is between 10 and 20 millimeters and fine concrete on the outer surface of a structure, and is characterized by comprising the following steps that: drilling holes on the surface of the structure in the process of construction; using the short end foot of a U-shaped shear resistant pin of which the two end feet have different lengths to hook the fibrage net, and inserting the long end foot thereof into the hole after a building structural adhesive is smeared on the long end foot; spraying the fine concrete after the adhesive is solidified; using the short end foot of a U-shaped hook of which the two end feet have different lengths to hook a second layer fibrage net, and inserting the long end foot thereof to the fine concrete; and spraying the fine concrete. The method can avoid the generation of interface micro cracks at high stress, effectively prevent interface peeling damages, reinforces building structures reliably, simply, efficiently and environmental protection, and is applicable to reinforcing and repairing various types of structures.

The invention provides a method for precisely machining a deep groove and a deep hole by varifocal lasers. The method comprises the steps that a plurality of focusing lenses with different focal lengths and workpieces are clamped; if deep groove machining is carried out, a laser beam is continuously output; laser etching machining is completed once; if deep hole machining is carried out, N laser pulses are output; the lasers are closed, and a working table moves to the original position; whether machining meets the requirements or not is detected; if machining meets the requirements, machining is finished; if machining does not meet the requirements, a focusing lens base is rotated, the next focusing lens is moved to the position of the current focusing lens, and laser machining is carried out again until machining meets the requirements. The pulse laser beam sequentially penetrates through the focusing lenses with the different focal lengths by rotating the focusing lens base, the focal lengths are progressively changed, the lasers are focused on the new exposed surface in the laser etching or punching process all the time, energy is more concentrated, the punching deep is larger, and the efficiency is higher. The invention provides a device for precisely machining the deep groove and the deep hole by the varifocal lasers at the same time.

The invention discloses a prestress-steel-wire-rope-bending-shearing-reinforced concrete T beam. The prestress-steel-wire-rope-bending-shearing-reinforced concrete T beam comprises a reinforcing system arranged on the concrete T beam. The reinforcing system comprises steel wire ropes, a plurality of bending-resistant reinforcing steel plates arranged at the bottom of the concrete T beam and a plurality of angle steels horizontally fixed to the two sides of a web plate of the concrete T beam; a plurality of bolt holes are formed in the other edges of all the angle steels in the length direction of the angle steels, adjustable bolts are arranged in all the bolt holes, circular rings are arranged at one ends of the adjustable bolts, and after the steel wire ropes are wound around the beam bottom, the two ends penetrate through corresponding circular rings respectively and are tensioned; a protection system is further arranged on the outer side of the reinforcing system. In the reinforcing process, prestress is applied to the steel wire ropes through the adjustable bolts, a specially-made tensioning apparatus does not need to be adopted, construction is convenient and fast, construction efficiency is greatly improved, the prestress is applied to the steel wire ropes, the stress hysteresis effect is avoided, and the reinforcing effect and the whole bearing capacity are improved; construction cost is low, construction is easy and convenient, the influence on structure weight is small, and the excellent structural performance and economic benefits are achieved.

The invention discloses a fiber reinforced composite material rib concrete drainage pipe pile which comprises a pile body, an end plate and inner sleeves. The pile body is internally provided with fiber reinforced composite material ribs. Carbon fiber is adopted for the material ribs to serve as the reinforcing materials, and unsaturated polyester or epoxy resin or phenolic resin serves as the base body. The material ribs are sleeved with steel pipes. The inner wall of the pile body is evenly provided with concrete protrusions, and the pipe pile body is evenly provided with a certain number of drainage holes. According to the fiber reinforced composite material rib concrete drainage pipe pile, steel ribs are replaced by the fiber reinforced composite material ribs, the problem that ordinary reinforced concrete piles are prone to crack after being pulled is effectively solved by the adoption of the advantages of the high-elasticity modulus, corrosion resistance and the like of carbon fiber ribs, and the service life of the permeable pipe pile is prolonged. Meanwhile, the fiber ribs are sleeved with the steel pipes, and the fiber ribs are separated from the concrete, so that the situation that a concrete structure interface is stripped and damaged due to insufficient fiber rib-concrete interface strength is avoided, and the inner wall of the pile body is creatively provided with the concrete protrusions so that the permeable pipe pile can be pulled out in the future demolition conveniently to rebuild the building foundation.

Provided is a bending member for a bamboo reinforced wood beam. The member is composed of a wood beam, a bamboo board, an adhesive, angular fasteners sand anchor bolts. The bamboo board is closely bonded on the bottom surface of the wood beam through the adhesive. The angular fasteners are arranged on angle positions where the bottom surface intersects with side surfaces of the wood beam along thevertical direction of the wood beam at spaced intervals. Bottom flanges of the angular fasteners are fixed on the bottom surface of the bamboo board. Flanges on the side surfaces of the angular fasteners are fixed on the side surface of the wood beam in order to form a member body. Through the angular fasteners, the reinforced wood board is anchored multiple times. The member enjoys following advantages of effectively preventing separation between the bamboo board and the wood beam, improving anti-bending performance of the wood beam and fully leveraging high anti-pulling strength of the bamboo material.

The invention relates to a shear strengthening method of a concrete beam. The method comprises the following steps of: selecting a fiber reinforcement with a diameter of 8mm-25mm according to the shear span area length of the concrete beam and the strength of concrete; drilling corresponding holes in a shear span area of the beam, wherein the diameter of the holes is 1.5 to 1.5 times larger than the diameter of the fiber reinforcement, the distance between adjacent holes is 1 to 2 times larger than the distance between hoop reinforcements in the shear span area, and the holes are positioned in the midpoints of the cross beam of the beam in the width direction; filling epoxy resin glue in the holes; applying prestress on the selected fiber reinforcement; and inserting the fiber reinforcements with prestress into the holes to form a shear system formed by longitudinal reinforcements, the hoop reinforcements, the fiber reinforcements, and epoxy resin glue and the concrete. The method has the beneficial effects that the damage to a concrete protecting layer limited to the concrete beam itself is avoided, the middle of the beam is provided with the holes, and the fiber reinforcements are fully wrapped by epoxy resin and concrete, so that a greater anchoring force is generated, the material utilization rate is improved, and the debonding failure of the fiber reinforcements and the concrete is also prevented, and thus the utilization value of the fiber reinforcements is increased.

A furniture hinge mounted between a furniture wall and a furniture door so as to be used as an opening and closing mechanism of the furniture door, in which, by using the movement part provided on the body part of the furniture hinge and the adjustment part provided at the movement path of the movement part, the entire length of the furniture hinge is changed by advancing and returning the movement part in the opening and closing process of the furniture door such that, since the furniture wall and the furniture door do not come into contact with each other even though the furniture door is completely opened, the peeling damage to the exterior of the furniture is prevented and contact noise is eliminated, thereby improving the satisfaction of consumers.

The invention discloses a preparation method of graphene. The method comprises the following steps: using novel expanded graphite as a raw material, oxidizing the expanded graphite at low temperatureof 45 DEG C by using a strong oxidization solution, and then reducing graphene oxide at the temperature of 200 DEG C, cooling to collect high-quality graphene. The expanded graphite is taken as the raw material in the invention, so that an expanded graphite sheet provided with an expanded graphite layer is beneficial to infiltration of an acid solution and the subsequent oxidation reaction. The synthesis process uses strong acid and performs a redox reaction at low temperature, and an ultrasonic stripping process is eliminated, so that the prepared graphene oxide has a large size, and the production of conductive graphene is facilitated.

The invention discloses an externally-wrapped anchor steel reinforcement structure for a concrete beam and a column joint. The externally-wrapped anchor steel reinforcement structure is composed of penetration steel angles, beam side steel angles, beam side steel plates and column side steel plates, wherein the penetration steel angles, the beam side steel angles, the beam side steel plates and the column side steel plates are connected in a planting bar type post-installed fastening mode. The penetration steel angles penetrate through floors and are connected with the column side steel plates, the beam side steel plates are connected with the penetration steel angles by the beam side steel angle, and therefore a complete set of reinforcement scheme with reasonable force transmission is formed. When the bearing capacity of beams and columns is improved, the problem that a core area of the joint is relatively weak caused by beam and column reinforcement is solved, and brittle shear failure in the core area is avoided; and internal force transmitted to the core area of the joint through the penetration steel angles is evenly distributed onto bolts and steel plates, so that shearing resistance and energy dissipation performance of the core area are greatly improved.

The invention discloses high-performance sulfur concrete and a preparation method thereof. The high-performance sulfur concrete comprises the following raw materials in percentage by mass: 30%-37% ofcement, 38%-43% of river sand, 11%-17% of water, 0.4%-0.8% of a water reducer, 8%-15% of sulfur powder, 0.1-0.5% of an emulsifying dispersant and 0.8-1.2% of resin emulsion. By the high-performance sulfur concrete provided by the invention, sulfur can be recycled, furthermore, the bending resistance, the seepage resistance and the frost resistance of the concrete can be improved, and the durability of the concrete and the service capability of the concrete under extreme condition are improved effectively.

The invention relates to the technical field of winding shafts, and discloses a microelectronic hollow inductor winding shaft. The side surface of an upper baffle, located on the outer ring of a rotating roller, is provided with a bayonet; the side surface middle part of the upper baffle, located at the bayonet, is provided with a clamping groove; the inner part of the clamping groove, located atthe bayonet, is fixedly connected to the inner end of a tension spring; the outer ends of the tension springs are elastically connected to the inner sides of two ends of a gear lever; an extension rodA is fixed by the gear lever, an extension rod B passes through a rotating ring and is slidably connected between two elastic support rods, the rotating roller passes through from the front surface of a casing, the extension rod A is bent and clamped between a fixing block and a supporting platform, a blocking block is buckled, a bottom baffle is clamped to the bottom end of the winding roller, the extension rod B passes through a clamping hole arranged in the bottom baffle, the bottom baffle is rotated, waste time and energy during a manual operation process can be avoided, and the efficiency in the production process is facilitated.

The invention belongs to the technical field of seismic reinforcement and discloses a method for anti-bending reinforcement of a beam end with a floor, wherein a wall or a pillar is disposed at the beam end; the floor is in perpendicular connection to a beam, the wall or the pillar; and composite mortar reinforced by a CFRP mesh is paved to an L-shaped connecting surface between the beam and the wall or the pillar for reinforcement. The method disclosed by the invention has the beneficial effects that based on characteristics of the CFRP mesh that the mesh is light, high in strength and modulus, flexible and easy in construction, easy in anchoring, overlapping and positioning, durable, anti-corrosion, anti-fatigue, anti-magnetic, anti-shielding, and anti-stripping and can reduce thicknessof a reinforcement layer, the CFRP mesh is built in the high-performance cement composite mortar for reinforcement of parts with complicated structures, so various adverse factors of reinforcement with various composite materials which take a traditional rebar mesh as a reinforcement phase can be remedied. The high-strength CFRP mesh is paved to the L-shaped connecting surface between the beam andthe wall or the pillar in an L-shaped manner, so the reinforcement layer formed through combination of the CFRP mesh and the subsequent cement composite mortar can give full play to an anti-tension effect.

The invention discloses a reinforcing system and method for a reinforced concrete column. A reinforcing groove is vertically formed in a side wall protective layer on the to-be-reinforced reinforced concrete column, and the interior of the reinforcing groove is coated with a filling material; the clean reinforcing groove is half filled with the filling material, then an aluminum alloy rib is placed into the clean reinforcing groove, and the reinforcing groove is pressed into the filling material; then the reinforcing groove is filled with a filling material and compacted and leveled, so that the reinforced concrete column and the aluminum alloy rib form a whole. A near-surface reinforcing method is adopted, so that the bonding area of the reinforcing rib and the concrete is increased, thepossibility of bonding stripping damage is reduced, and the bonding performance of the reinforcing rib and the concrete is improved. The characteristics of the aluminum alloy rib are utilized so thatthe energy consumption capability of the reinforcing column can be remarkably improved, the residual deformation generated after stress of the concrete column is reduced, and the damage self-repairingcapability of a component is improved.

The invention discloses a modular rubber plate for roller rubber coating. Mutually-matched socket and spigot joints are arranged at two ends of a rubber plate head (1) and two ends of a rubber plate tail (2). The length of the working face between the rubber plate head and the rubber plate tail is 157 mm+/-20 mm, 314 mm+/-20 mm, 471+/-20 mm, 628+/-20 mm, 785+/-20 mm or 942+/-20 mm. The socket and spigot joint (3) at the rubber plate head portion is wedge-shaped, or step-shaped or convex, and the socket and spigot joint (4) at the rubber plate tail portion is inverted-wedge-shaped, or inverted-step-shaped or concave and is matched with the socket and spigot joint at the head portion. A soft rubber layer (5) is arranged on the bonding face of the rubber plate. The anti-stripping performance of the roller rubber plate is improved, cutting is not needed, construction is convenient, and quick roller rubber coating in a field can be achieved.

The invention discloses a novel surface-mounted inductor which comprises a base, an I-shaped magnetic core located on the upper surface of the base, and a coil winding arranged on the magnetic core, wherein one end of the magnetic core is adhered to the upper surface of the base with pins PIN; the pins PIN of the base are welded with the terminals of the coil winding; gaps are formed in black plastic positions at the pin-free ends of the base; and electric spark lines are formed on the surface, bonded with the magnetic core, of the base. By the adoption of the structure, the product quality and the production efficiency of the surface-mounted inductor are improved.

The invention discloses a rubber-metal bonding quality detection method. The method is characterized by comprising the following steps: 1, preparing a bath solution with metal cations and anions, 2, soaking a rubber-metal part into the bath solution, polarizing the cations and anions in the bath solution under the action of current according to a metal electroplating method within specified time,extruding the cations and anions into a rubber-metal bonding interface to destroy the stability of adhesive and metal bonding chemical bonds; and 3, taking out the rubber-metal part, checking the stripping damage condition of the bonding edges of rubber and metal, and judging whether the bonding quality of the rubber-metal part is qualified or not according to the bonding quality requirement of the product. Nondestructive testing of the rubber-metal bonding quality is achieved, product scrapping after detection is avoided, and the method is suitable for batch detection of rubber metal parts. The invention further provides a rubber-metal bonding strength quality judgment method.

The invention discloses a UHPC (Ultra High Performance Concrete) board and concrete combined type frame slab bridge and a construction method thereof, the structure part of the UHPC board and concrete combined type frame slab bridge comprises a plurality of groups of bridge piers arranged at equal intervals, cover beams are arranged on the bridge piers, UHPC board trusses are erected among the cover beams, concrete is poured on the UHPC board trusses, and the UHPC board trusses are connected with the cover beams through the concrete. The ends of the adjacent UHPC plate trusses are correspondingly provided with hogging moment area UHPC prefabricated slabs, and the two ends of each hogging moment area UHPC prefabricated slab are connected with concrete at the ends of the UHPC plate trusses on the two sides respectively. Compared with a cast-in-place common concrete structure, the UHPC board concrete combined continuous frame slab bridge designed by the invention is better in stress performance, better in durability, more convenient in construction process and lower in construction cost, has very remarkable advantages, and has relatively high applicability to construction of bridges in coastal splash zones.