48results about How to "Meet repair requirements" patented technology

The invention relates to a build-up welding rod for repairing a Cr3 roller and a build-up welding method, which belong to the technical field of welding materials and welding. The build-up welding rodcomprises a welding core and a coating, the welding core is H08A steel and the coating of the welding rod comprises, by mass percent, 36 to 42 marble, 20 to 26 fluorite, 1.5 to 4 low-carbon ferromanganese, 1 to 4 ferromolybdenum, 13 to 17 high carbon ferro-chrome, 0 to 1.5 calcined soda, 1 to 4 rare earth alloy, 4 to 8 titanium dioxide, 0.5 to 1.5 graphite, 3 to 5 No,45 silicoferrite and 4 to 7 silicon dioxide. The build-up metal has no crack, good crack resistance, good wear resistance, high hardness and plasticity and good tempering stability. The welding method is simple and convenient, and the connection of the melt-applying metal and the roller is firm to excellently satisfy the repairing requirement of the Cr3 support roller.

The invention discloses an epoxy mortar used for repairing sea oil gas pipeline and a preparation method thereof, which belongs to the technical field of polymer mortar application. The epoxy mortar is composed of a component A, a component B and a component C, the component A is prepared by bisphenol A epoxy resin E44, E51 and a certain amount of auxiliary agent, the component B is prepared by mixing a T31-3 type modified phenolic amine curing agent and a NP440 amidoamines curing agent according to a certain proportion, and the component C is an aggregate by mixing cement and quartz sand according to a certain proportion. The preparation method comprises the following steps: heating the component A to the temperature of 30-50 DEG C, stirring to homogeneous phase, then mixing the component A and the component B according to a certain proportion, uniformly mixing, adding the component C according to a certain proportion, and uniformly blending to obtain the epoxy mortar. The preparation method has simple technology, the epoxy mortar has strong cohesiveness, the epoxy mortar through solidification has excellent anti-compression, anti-punching and anti-seawater corrosion performances, and the epoxy mortar can be used for repairing and reinforcing a concrete coating on the sea oil gas pipeline and a thin layer of an underwater concrete structure.

The invention discloses a composite material component rapid repairation device and a composite material component rapid repairation method based on microwaves, and relates to the technical field of composite material component external field rapid repairation technology and equipment. According to the invention, one end of a microwave generating source is connected with a microwave transmission line, and the other end of the microwave transmission line is connected with one end of a coaxial waveguide converter and one end of a bi-directional coupler; the other end of the coaxial waveguide converter and the other end of the bi-directional coupler are connected with one end of a microwave radiator; the other end of the microwave radiator is oppositely provided with a composite material component; one side of the composite material component, which is close to the composite material component, forms a to-be-repaired region; the to-be-repaired region is connected with one end of a signal amplifier by an optical fiber sensor, the other end of the signal amplifier is connected with the signal converter, the other end of the signal converter is connected with one end of a control unit, and the other end of the control unit is connected with the other end of the microwave generating source. According to the invention, the aims of high curing speed, uniform heating, excellent repairation component quality and health monitoring of the repairation region are reached.

The invention belongs to repair technology of a composite material blade of a rotor system, and relates to an enhanced method after damage of a composite material blade skin and internal filling. Theenhanced method comprises the following steps that after damaged areas are cleaned, a filling area is formed; adhesive films are laid in the filling area, the bottom surface and the side surfaces of acore material filling area are coated with the adhesive films; the core material filling area is filled with core materials, adhesive film materials are laid on an entire repair area on the upper part of the filling core materials, and the all skin damaged areas are covered with the adhesive film materials; and the upper part of a docking area of the filling core materials and a blade structure is covered with a prepreg. The enhanced method is used for smoothing the small jump between the filling core materials and the blade structure.

The invention belongs to the technical field of highway crack repair materials and preparation methods thereof, and mainly solves the technical problems that the existing materials used for repairing pavement cracks easily cause pavement crack protrusion, the material strength is low, the elongation at break is low, the permeability is low, the environment is polluted, the curing time is long and the pavement binding property is poor. The material is formed by a component A and a component B through curing. The component A comprises 30 to 65 parts of polyoxypropylene diol N220, 40 to 25 parts of polyoxypropylene diol N210, 12 to 5 parts of amino-terminated polyoxypropylene ether D2000, 8 to 2 parts of carbon black, 7 to 2 parts of titanium dioxide and 3 to 1 parts of catalyst; the component B comprises 171.4 parts of polyether polyurethane prepolymer and 28.6 parts of di 2-ethyl hexyl phthalate and the like; after the component A and the component B are mixed according to a mass ratio of 1:1, the immobilization time of mixture is shorter than or equal to 8min under 25DEG C, the curing time is shorter or equal to 90min and the road can be opened to traffic after curing.

The present invention discloses an ecological restoration method for bottom-cultured Cyclina sinensis at beach. The present invention includes: (1) selecting a damaged beach prepared for ecological restoration; (2) selecting Cyclina sinensisas a species for ecological restoration of the damaged beach; (3) putting a number of Cyclina sinensis fingerlings to the damaged beach and breeding; (4) checking out whether the toxic and hazardous substances in sediment environment meet conditions or not after the batch of Cyclina sinensis fingerlings is bred and harvested; and (5) if at least one toxic and hazardous substance in the sediment environment detected in step (4) does not meet the conditions, repeating steps (3) and (4). If the toxic and hazardous substances in the sediment environment detected in step (4) meet the conditions, the ecological restoration of the damaged beach is completed. The method adopts an ecological restoration method to repair the damaged beach, recovers the beach ecosystem, reduces the pollution degree of water body, as well as generates aquaculture economic benefits, thereby achieving the goals of ecological protection of the marine beach and the sustainable economic development.

The invention relates to a bone tractor, in particular to an adjustable mid-face bone tractor and a design method thereof. The bone tractor comprises a bracket, a cranial bone fixing pin, a traction titanium pin and a traction fiber at least. The invention is characterized in that the bracket is formed in a way that a cambered connection frame with clamping grooves is fixedly connected with adjustable connection rods by removable connection parts; the middle part of the cambered connection frame is fixedly connected with a bracket connection block by removable connection parts; and one or more than one adjustable connection rods can be fixed on the cambered connection frame as required, the adjustable connecting rods are connected with traction screw rods and traction nuts, and the traction of the mid-face bones of a patient is completed by the traction fiber. By adjusting the antero-posterior position of the traction fiber, the invention can meet the requirements for the multi-point, multi-direction and force-adjustable traction of the mid-face bones in such treatment, thereby achieving the optimum treatment effect of reconstructing the face.

The invention discloses a nucleus pulposus-cartilage extracellular matrix scaffold and a preparing method thereof and belongs to the biological tissue engineering technology. The preparing method comprises the steps that nucleus pulposuses and bony articular surface cartilage are smashed, decellularized, subjected to gradient centrifugation to collect extracellular matrix microfilament suspension, and freeze-dried to obtain a freeze-dried decellularized nucleus pulposus matrix and a freeze-dried decellularized cartilage matrix, the two matrixes are taken in certain proportion and dissolved in ultrapure water to prepare mixed matrix suspension with certain concentration, and the mixed matrix suspension is freeze-dried and subjected to ultraviolet irradiation crosslinking and chemical reagent crosslinking in sequence so that the nucleus pulposus-cartilage extracellular matrix scaffold can be obtained. In this way, the defect that the nucleus pulposuses are hard to obtain due to the small number is overcome; the preparing technology is simple, and decellularizing can be achieved thoroughly; the matrix scaffold is degradable and high in biocompatibility; the matrix scaffold is of a three-dimensional structure, is high in mechanical property and plasticity, and can facilitate the distribution, growth and differentiation of seed cells; the freeze-dried extracellular matrixes are convenient to store and prepare and can be used for constructing a tissue engineered intervertebral disc to repair partial defects of the intervertebral disc, and broad clinical application prospects are realized.

The invention provides a casting gap repairing device. The casting gap repairing device comprises a closed container, wherein the closed container is respectively communicated with a penetrating fluid container and a cleaning water container; a penetrating fluid inlet and outlet valve is arranged between the closed container and the penetrating fluid container, and a water inlet and outlet valve is arranged between the closed container and the cleaning water container. The casting gap repairing device comprises an air pipe, a carbon dioxide pipe, a pressure increasing pipe and a pressure reducing pipe, wherein an air ventilation valve is arranged on the air pipe; a carbon dioxide inlet valve is arranged on the carbon dioxide pipe; a pressure increasing valve is arranged on the pressure increasing pipe; a negative pressure valve is arranged on the pressure reducing pipe. According to the casting gap repairing device, before a water-soluble sodium silicate repairing liquid is charged to the closed container, the closed container is vacuumized, so that the diffusion velocity of charged water-soluble sodium silicate solution molecules is multiplied, and the diffusion time is greatly shortened; furthermore, gaps in a casting are in a vacuum suction state, so that deep holes and tiny air holes in the casting can be full of water-soluble sodium silicate quickly and completely; in the closed container, the carbon dioxide and the water-soluble sodium silicate fully react to finally generate silicon dioxide to accumulate in the air holes of the casting, so that a hardening repair function is achieved.

The invention relates to a method for repairing a plunger of a ship steering engine, in particular to a method for repairing the plunger of the ship steering engine, which is particularly suitable tothe repair of the plunger of the ship steering engine for a sea ship. The method sequentially comprises the following steps: preprocessing, spraying, brush plating, bath plating, simulating and examining, and accepting. The invention not only can fully repair the plunger of the ship steering engine to meet total repair requirements, but also can not damage original metallographic structures and base materials of the plunger of the ship steering engine without causing welding distortion, can not increase the processing difficulty of the plunger of the ship steering machine and can not influencethe subsequent bath chromium plating process of the plunger of the ship steering engine after the repair, and is convenient for field maintenance.

The invention discloses a preparation method of a nanometer calcium hydroxide/hexagonal boron nitride nano-composite, used for solving the technical problem of large calcium hydroxide particles in a nano-composite prepared by the existing method. According to the technical scheme, the nanometer calcium hydroxide/hexagonal boron nitride nano-composite is synthesized by adding hexagonal boron nitride in the process of synthesizing calcium hydroxide through a solution method. Compared with the prior art, on one hand, the preparation method is simple in preparation process, saves the time, is controllable and is large in quantity; and on the other hand, the particle size of the synthesized nano-composite is about 50 nanometers, so that the nano-composite meets the requirements for the aspect of cultural relic restoration. Meanwhile, with participation of boron nitride, the synthesized calcium hydroxide is not liable in aggregation, so that the technical problems of instability and easiness in aggregation of the synthesized calcium hydroxide are solved. Meanwhile, more importantly, by utilizing the strong oxidation resistance, high temperature resistance and good mechanical properties of the hexagonal boron nitride, the strength of protecting cultural relics is improved.

Dental device fixing unit (3) which can be secured resiliently into a dental implant enabling optional angular position adjustment comprising a threaded shank (4) tiltable in all direction projecting from the implant (2) and a fixing element (5) for securing the threaded shank (4) to the implant (2). The fixing element (5) consists of an insertion piece (6) and an intermediate piece (7) provided with a bore-hole (14) in which the threaded shank (4) is led through in order to secure the insertion piece (6) to the implant (2). The end (9) of the insertion piece (6) and the inner end (8) of the threaded shank (4) are attached to each other in a swivelable manner. The inner end (8) of the threaded shank (4) is positioned between the end (9) of the insertion piece (6) and the upper end (13) of the intermediate piece (7).

The invention discloses a welding bead residual stress eliminating device and method. The welding bead residual stress eliminating device comprises a magnetic base, a mechanical arm and an ultrasonic impact head, wherein the ultrasonic impact head is hinged to a first end of a mechanical arm, and a second end of the mechanical arm is hinged to a magnetic seat. The method comprises the following steps of A, aligning the head of the ultrasonic impact head to a to-be-repaired part of a workpiece; B, opening the magnetic seat, and enabling the magnetic seat to be adsorbed nearby the workpiece; C, adjusting the mechanical arm and the ultrasonic impact head to rotate to a position far away from the to-be-repaired position; D, starting cold welding repair equipment, and carrying out welding repair on the workpiece; E, aligning the head of the ultrasonic impact head to the surface of a welding bead of the workpiece after welding repair is completed, enabling the ultrasonic impact head applying pressure to the welding bead, and fixing the mechanical arm and the ultrasonic impact head; and F, starting the ultrasonic impact head so as to enable the ultrasonic impact head carrying out residual stress elimination of the welding bead, and repeating the above steps. The device and the method have the advantages that the labor intensity is low, the impact pressure is stable, and the repairing effect is good.

The invention discloses a tubular scaffold having a double-layer structure, wherein the double-layer structure comprises an outer layer and an inner layer, wherein the outer layer is a dense layer having a first porosity and the inner layer is a porous layer having a second porosity; The dense layer and the porous layer are connected into one body through an interpenetrating polymer network structure formed between the polymers; And the first porosity is smaller than the second porosity. The invention also discloses a method for preparing the tubular scaffold by a one-step method. The tubularscaffold of the invention is integrally formed, wherein the inner layer can promote tissue growth and induce tissue regeneration, the outer layer has anti-adhesion effect, and the tubular scaffold hasthe advantages of good mechanical properties, tight connection between layers, soft hand feeling after wetting, and the like. In addition, the preparation method of the tubular scaffold of the invention has the advantages of simple process, easy operation and the like.

An antiseepage leak-stopping organic grouting material used for landfill and an application method thereof. According to the gross weight of the slurry, the antiseepage leak-stopping organic grouting material contains 60-80 wt% of polyurethane and 20-40 wt% of a dichloromethane diluent. The application method comprises the following steps of: 1) mixing 60-80 wt% of polyurethane and 20-40 wt% of the dichloromethane diluent with stirring, and filling the mixture into a specified position; and 2) maintaining, preventing water and preventing impurity pollution. According to the invention, the problem of single performance of common organic grouting materials is overcome. The antiseepage leak-stopping organic grouting material provided by the invention has good groutability, binding property and flexibility, has good adaptability, and can be used to rapidly and effectively repair leaks of an HDPE film used in an impervious layer of a refuse landfill. The repaired material has high corrosion resistance and low permeability and the permeability coefficient meets the national standards. Simultaneously, the material has good flexibility after solidification, and secondary damage caused by nonuniform settlement of the refuse landfill bottom to the repaired part can be overcome.

The invention belongs to the technical field of aluminum battery boxes, and provides a rivet pressing water pipe connector with sealing performance for a battery box water cooling plate, which is usedfor sealing and firmly connecting a water pipe connector and an aluminum alloy water cooling plate. The rivet pressing water pipe connector with the sealing performance for the battery box water cooling plate comprises a main body; the main body is of a hollow cylindrical body structure; hobbing teeth are formed in one end of the main body; the peripheries of the hobbing teeth are provided with awaterproof sealing layer; and the waterproof sealing layer can fill the gap between the hobbing teeth and the aluminum alloy water cooling plate after being extruded in a rivet pressing process. Therivet pressing water pipe connector with the sealing performance for the battery box water cooling plate has the advantages that the rivet pressing water pipe connector is simple in structure and excellent in sealing performance, and can effectively prevent the water cooling plate from a sealing failure and preventing a water cooling liquid from leaking; moreover, the rivet pressing water pipe connector is made of a high-strength aluminum alloy material; and the connector has the advantages of excellent strength, good corrosion resistance, simple and feasible process, high machining efficiencyand the like.

The invention discloses a single-component indoor wall repairing material and a preparation method thereof and relates to the technical field of wall materials. The single-component indoor wall repairing material comprises 55-75 parts of silicate cement, 34-36 parts of seaweed powder, 30-35 parts of a carbon fiber-graphene enhancer, 24-26 parts of ethyl acetate, 20-22 parts of titanium dioxide, 14-16 parts of dimethicone, 14-16 parts of sodium carbonate, 14-16 parts of a seeping gelling agent, and suitable water. The single-component indoor wall repairing material is used for repairing wall cracks and has good stability and high strength, cohesive property may well meet the repairing requirement, layering is decreased, and peeling is relieved.

The invention discloses environment-friendly concrete water-based epoxy repair mortar. The mortar is prepared through mixing bisphenol A epoxy resin and C12-14 alkyl glycidyl ether to obtain a component A, mixing a nonionic modified polyamine curing agent, a wetting agent and a defoaming agent, carrying out uniform dispersion to obtain a component B, mixing two types of quartz sand with differentgranularities to obtain a sand mixture, uniformly mixing cement and the sand mixture to obtain a sand raw material, mixing the components A and B, carrying out stirring to obtain paste, adding 1/3 oftap water into the paste, carrying out unfirom stirring, adding the rest of the tap water into the mixture, carrying out uniform stirring to obtain an epoxy resin mixed solution, mixing the sand raw material and the epoxy resin mixed solution and carrying out uniform stirring to obtain the environment-friendly concrete water-based epoxy repair mortar. The repair mortar does not contain an organicsolvent, prevents environmental pollution and potential safety hazard, does not influence material performances in use, satisfies the concrete repairing requirements and is free of higher-level treatment on the base layer.

The invention relates to a hollow and micropore repair construction method of a wear-resisting emery ground. Through the process of early-stage drilling and high-pressure pump glue injection, ground hollows are repaired. After emery wear-resisting ground micropore repairing is adopted, ground hollows are all eliminated, surface cracks are all sealed, from the ground coring experiment result, compressive strength can reach design strength, from impressions, surface cracks cannot be seen clearly by naked eyes, and the effect of the repaired ground is good.

The invention relates to a construction method of a non-excavation expansion clinging-type repair pipeline. The construction method is characterized by comprising the following steps of 1, construction preparation, 2, winding to manufacture a tube, 3, expansion and clinging, and 4, port treatment. The construction method is scientific and reasonable in structural design, has the advantages that excavation is not needed, the construction speed is high, work with water can be conducted, the repair cost is low, the airtightness is high, the cross section loss is small, the discharge capacity is high and the achievement is easy, and the method is particularly suitable for repairing a middle and small caliber drainage pipeline, and is the construction method of the non-excavation expansion clinging-type repair pipeline with high innovativeness.