126results about How to "Reduce the number of repairs" patented technology

The invention discloses an asymmetrical bolt-net-cable combined supporting method for a special-shaped recovery tunnel of a large inclination angle coal bed. The method is characterized by comprising the following steps of: digging the tunnel according to the shape of the tunnel section, and supporting tunnel top plates, tunnel high-cut surrounding rock and tunnel low-cut surrounding rock by using prestressed anchor rods, steel bar nets and steel strips; arranging top plate prestressed anchor cables on the tunnel top plates; for the solid coal recovery tunnel, arranging high-cut prestressed anchor cables on the tunnel high-cut surrounding rock when the tunnel is dug for 5 to 7 days, and arranging struts in the center of the tunnel towards one side of the low-cut surrounding rock; and for the small coal post reserved recovery tunnel, arranging low-cut prestressed anchor cables on the tunnel low-cut surrounding rock when the tunnel is dug for 5 to 7 days, and arranging struts in the center of the tunnel towards one side of the low-cut surrounding rock. The combined asymmetrical supporting method has good application effect of stability control of the special-shaped recovery tunnel of the large inclination angle coal bed, the repair frequency of the tunnel is greatly reduced, and the supporting cost of the tunnel is reduced.

The invention discloses a microcapsule type additive for corrosion-resistant coating and a preparation method thereof. The microcapsule type additive is prepared by the following components by weight percent, 40wt-80wt% of water, 5wt%-35wt% of air-drying type film-forming substance, 0.01wt%-10wt% of anti-rusting agent, 5wt%-30wt% of capsule-wall resin and 0.05wt%-2wt% of emulsifying agent; the mixture of the air-drying film-forming substance and the anti-rusting agent is wrapped in the capsule-wall resin which is urea resin, melamine-formaldehyde resin or modified polymer of the urea resin and melamine-formaldehyde resin or mixture of two or more than two substances. The additive disclosed by the invention has the advantages that the additive is added into the corrosion-resistant coating, the corrosion resistance of the prepared coating can be further improved, especially when the paint film is damaged due to action of external force, the added additive can release a restoration agent and the anti-rusting agent to restore the damage and inhibit the corrosion expansion by self, so that the service life of the paint film is prolonged.

The invention relates to a method for controlling surrounding rock deformation of a gateway subjected to repeated overhead mining by using a hollow grouting anchor cable. The method comprises the following implementation steps of: performing repair brushing on the section of the gateway, reinforcing support in a bottom plate gateway to be mined in an advance face which is 280-320 meters in range by adopting high-performance pre-stressed anchor rods, and meanwhile, arranging a metal net on the entire section of the gateway; arranging a novel hollow grouting anchor cable between a top plate of the gateway and the high-performance pre-stressed anchor rods on both sides; grouting on the surface of the surrounding rock of the gateway for enclosing; and injecting a grouting material into the hollow grouting anchor cable. The method has the characteristics of high setting load, sudden increase in resistance and high bearing capability, the problems of high gateway deformation, strong heaving floors and difficulty in maintaining can be well solved, the gateway repair times are reduced, and the gateway support cost is reduced effectively; and the method is particularly suitable for solving the problems of rapid attenuation and loss of anchoring force caused by looseness, breakage and large deformation of surrounding rock due to repeated overhead mining on the gateway.

The invention discloses a surrounding rock supporting construction method of a water-contained roadway of a coal mine and belongs to the field of surrounding rock supporting of underground engineering. The surrounding rock supporting construction method comprises the following steps that (1) primary spraying is conducted after the roadway is excavated; (2) according to the geological conditions of the water-contained roadway, a controllable grouting anchor rod structure is designed, and controllable grouting anchor rod-anchor cable supporting parameters are designed; (3) through the combination of controllable grouting anchor rods, anchor cables, metal nets and sprayed grout supporting, so that a grouting reinforcement waterproof ring is formed, and grout is sprayed onto the surrounding rock on the surface of the roadway; (4) the key portion where supporting needs to be reinforced and water insulation is needed is determined through the field observation technical means such as numerical simulation; (5) the supporting parameters of the water-contained roadway are adjusted and optimized, and grouting reinforcement supporting is conducted on the key portion; and (6) a base plate of the roadway is reasonably supported. The invention further provides a surrounding rock supporting structure. The supporting method and structure are suitable for water-contained roadways with different depths, roadways with broken surrounding rocks, and soft rock roadways; and in addition, construction is easy and convenient, and the supporting method and structure can be popularized within a wide range.

The invention discloses a double-layer anchor net cable supporting structure for controlling mining roadway surrounding rock deformation. The double-layer anchor net cable supporting structure is characterized in that secondary anchor net supporting is performed on the basis of primary anchor net supporting, secondary supporting anchor rods (2-2) and primary supporting anchor rods (2-1) are arranged at intervals, the row spacing between the anchor rods is 700-900 mm, the specifications of the secondary supporting anchor rods (2-2) are the same as those of the primary supporting anchor rods (2-1), hollow grouting anchor cables (3) are arranged between the secondary supporting anchor rods (2-2), the interval between the hollow grouting anchor cables (3) is 1000-1500 mm, and the row spacing is 700-1800 mm. According to the supporting structure, the capability of a double-layer anchor net actively supporting shallow part surrounding rock can be brought into full play, the supporting capability of deep part surrounding rock can be improved through the anchor cables, the roadway supporting safety reliability is improved, severe deformation of a mining roadway can be controlled, it can be guaranteed that the supporting structure is continuously effective during the service life of the roadway, the roadway rework times are reduced, and the roadway maintenance cost is reduced.

The invention provides a high-drawing speed continuous casting machine crystallizer copper plate electroplating process. The process comprises the steps of a), performing electroplating pretreatment of a copper plate base body; b), bonding the lower portion of a copper plate firmly by using insulating tapes and placing the copper plate in a electrolyzer; c), placing a positive electrode in an electroplating tank, and injecting high-temperature coating resistant electroplate liquid into the tank; d), switching on the power supply and starting electroplating; e), bonding the upper portion of the copper plate firmly by using the insulating tapes, placing the lower portion of the copper plate to the electrolyzer after pretreatment; f), placing the positive electrode into the electroplating tank, and injecting wear-resistant coating electroplate liquid; g), switching on the power supply and starting electroplating; and h), after the electroplating, performing electroplating aftertreatment of the copper plate. According to the process, twice electroplating of the crystallizer copper plate is performed, the upper portion and the lower portion of the copper plate are electroplated with different coatings respectively, the upper surface is provided with a high temperature-resistant coating, and the lower surface is provided with an anti-wear coating. The service life of the copper plate is prolonged, the usage times of the crystallizer copper plate are increased, and the maintenance costs and the maintenance load are reduced.

The invention discloses a large-curvature aircraft fuselage double-track positioner unit, which comprises a first mounting base mounted on a tooling platform, a vertical column mounted on a free end of the first mounting base, a second mounting base arranged on the top of the vertical column, and a cantilever arranged on the second mounting seat. The vertical column is slidably connected with thefirst mounting seat through a first sliding mechanism. A positioning pin is fixedly arranged on the vertical column. The cantilever is mounted on the second mounting seat. The cantilever is slidably connected with the second mounting seat through a second sliding mechanism. Symmetrical cantilever positioning quick locking pins are arranged on the second mounting seat and on both sides of the cantilever. The cantilever is provided with a product positioning pin bolt at a working end. According to the invention, the retractable distance and the reachable size of the positioner are improved, thetooling space is enlarged, meanwhile, the post-maintenance cost of the positioned is reduced, and the service life of the positioned is prolonged.

The invention discloses a technique for preventing defects of a surfacing wear-resistant layer of a part. By the technique, the surfacing quality of parts such as pistons is improved, the number of rework is reduced, the one-step delivery-check qualified rate of the parts is improved, and the production cost is reduced. According to the technical scheme, the technique comprises the following steps of (1) roughly turning outlines of a piston part to obtain a part with a cylindrical boss structure and forming an annular groove with the inverted-isosceles-trapezoid-shaped section in a cambered surface of a large end of the part; (2) surfacing a nickel-base superalloy auxiliary layer in the annular groove, performing crossing symmetrical welding, transversely welding the annular groove along the axial direction, sequentially welding the annular groove until surfacing on the whole annular groove of the part is finished and machining the auxiliary layer; (3) surfacing an aluminum bronze layer on the auxiliary layer and performing crossing symmetric welding; and (4) sequentially performing destressing treatment and finish machining on the piston part after the piston part is subjected to surfacing so as to obtain a finished product of a piston.

The invention discloses a support method for a deep soft rock roadway, which includes the following steps: (1) measuring the thickness of the broken rock zone of the surrounding rock of a roadway; (2)determining the relationship between the deformation of the roadway and the creep time; (3) carrying out primary shotcrete support; (4) installing an anchor rod net; (5) carrying out secondary shotcrete support; (6) installing a circular steel bracket; and (7) backfilling the bottom of the roadway. A support method based on concrete-anchor rod net-concrete-shed pipe-steel support is adopted, andthe support structure is rigid-flexible, which can improve the support strength and reduce the number of repairs. The same support structure is also adopted at the bottom of the roadway, and the bottom is backfilled with gravel, which can improve the support strength at the bottom of the roadway and solve the problem of bottom heave. A structure of shed pipe-steel support is adopted, and the shedpipe can withstand a certain amount of deformation, so that the influence of long-term creep deformation of the roadway on the steel support structure can be avoided, and the number of support repairscan be reduced.

The invention belongs to the field of error control during part machining process, and relates to a closed-loop quality control simulation method with simulation prediction and actual production integrated. The method includes the steps of 1), performing multi-operation multi-error source analysis and description of the part machining process; 2), designing a data integration real-time collecting method and device of on-side multi-operation multi-error sources; 3), performing simulation prediction on comprehensive error on the basis of a dynamic error source coupling model; 4), predicting a quality pre-control method on the basis of dynamic error simulation prediction; 5), adjusting the out-of-control process according to quality monitoring situations and realizing closed-loop quality control. Thinking bandage of an existing method is broken through during control over the multi-operation machining process of the parts, prediction of the errors during the machining process is performed firstly, and then quality pre-control and process adjustment is performed on the basis of error prediction. Conventional afterwards quality control is converted into prior pre-control of quality by the method which is ideal in quality control.

The invention discloses a polishing method for a glass input window element and a clamp and belongs to the field of glass machining. According to the polishing method, initial polishing and final polishing are conducted on the two surfaces of the glass input window element. The polishing method includes the following steps that initial polishing is conducted, wherein the glass input window element to be polished is pressed on a polishing disc to be subjected to initial polishing till the number of apertures of the surface of the element ranges from 1 to 5; and final polishing is conducted, wherein the element obtained after initial polishing is pressed on the polishing disc to be subjected to final polishing till the defect of the surface of the element reaches the zero level standard. The polishing method has the beneficial effect of being low in rejection rate.

The invention provides a laser radar for a driverless car with high safety performance, and relates to the field of parts for the driverless car. The laser radar for the driverless car with high safety performance comprises a transverse plate. A through hole is formed in the transverse plate; a hinge is fixedly connected to the right side of the inner wall of the through hole, and the hinge comprises a upper hinge piece and a lower hinge piece; two rotating bases are fixedly connected to one side, close to the upper hinge piece, of the lower hinge piece; one side, close to the lower hinge piece, of the upper hinge piece is fixedly connected to the surface of a rotating rod; the two ends of the rotating rod are penetrating the two rotating bases and extend to the outside of the two rotatingbases respectively; the upper hinge piece is located between the two rotating bases, and the lower hinge piece is fixedly connected to the right side of the inner wall of the through hole; an iron plate is provided at the top of the transverse plate. The laser radar for the driverless car with high safety performance is high in the safety performance, reduces the number of times of performing inspection and repair on the laser radar by a car owner, and saves time and labor.

The invention relates to the field of alloy smelting facilities and provides an ultrathin aluminum-based steel flowing tank. The wall thickness of a tank body of the steel flowing tank is 12-25 mm, and the tank body of the steel flowing tank is of a segmental structure and comprises a steel receiving tank, a first steel flowing tank, a second steel flowing tank and a tapping tank connected successively. The tank body of the steel flowing tank is lighter and thinner. As the wall thickness and the weight are reduced greatly, the production and application costs are lowered. A connecting mode between the tank body assemblies is also changed, so that the tank body assemblies are more easily replaced. Therefore, the risk that a repair material pollutes an alloy solution is reduced fundamentally.

The invention discloses a COB module repairing method. The method comprises the following steps of providing a COB module with an LED damage after packaging; melting the solder at the LED damage position; and if the LED damage is still not repaired, melting the welding flux at the dead lamp position repeatedly. According to the COB module repairing method provided by the invention, chip-level repairing can be realized through a fixed-point heating mode, the times of glue digging, crystal fixing and film pressing repairing are greatly reduced, and then single-point crystal supplementing repairing is carried out on the remaining LED damage positions which cannot be repaired through the fixed-point heating mode. According to the COB module repairing method, the dead lamp repairing efficiency can be greatly improved.

The invention relates to the field of municipal engineering, and particularly discloses a non-excavation inspection wheel comprehensive repairing method. The non-excavation inspection wheel comprehensive repairing method comprises the steps of grouting reinforcement for a soil body, local leakage checking and stoppage, comprehensive surface spray repairing, and the like. According to the non-excavation inspection wheel comprehensive repairing method, an inspection wheel is comprehensively reinforced and repaired, the repairing effect is good, and the service life of the inspection well and corresponding pipe networks is effectively prolonged.