4528 results about "Sand blasting" patented technology

The invention discloses a high-rise building operation robot, and belongs to the technical field of engineering construction, the high-rise building operation robot comprises a base, the base is provided with a mechanical arm, a driving mechanism for driving the mechanical arm to move horizontally and a lifting mechanism for vertically moving along a wall surface, the end part of the mechanical arm is provided with a sand blasting gun, two sides of the sand blasting gun are provided with distance measuring sensors, and the base is provided with a wind direction and wind speed sensor; the modeling module is used for fusing sensor data to generate an environment model containing three-dimensional geometric and semantic information and a dynamic wind field distribution model; the cooperation module generates a cooperation control instruction sequence for coordinating each component based on prediction optimization control; the adjusting module corrects parameters of the sand blasting gun in real time through autonomous learning; the execution module generates a driving instruction in combination with feedforward and compliance control; and the decision module monitors and outputs an operation adjustment instruction or a re-planning instruction. The device can sense the condition of the outer wall in real time and dynamically adjust the operation strategy, the adaptability to the complex wall surface is improved, meanwhile, wind disturbance is effectively resisted, and the sand blasting quality is guaranteed.

The invention discloses a neodymium iron boron composite magnet and a production process thereof, and belongs to the technical field of magnetic materials. Carrying out sand blasting and phosphoric acid treatment on the neodymium-iron-boron magnet to obtain a pretreated neodymium-iron-boron magnet; and mixing 50-60 parts of epoxy resin, 30-40 parts of polyurethane and 10-20 parts of polysiloxane, then adding 10-20 parts of a solvent, 8-16 parts of filler, 3-5 parts of an auxiliary agent and 1-3 parts of dibenzoyl peroxide, stirring to obtain a protective coating, then spraying the protective coating on the surface of the pretreated neodymium-iron-boron magnet, and curing to obtain the neodymium-iron-boron composite magnet. The auxiliary agent contains a hindered phenol structure, a benzotriazole structure and fluorine atoms, and a hybrid cross-linked network structure is formed among the auxiliary agent, the epoxy resin and the filler, so that the auxiliary agent and the filler can be highly dispersed and stably exist in the protective coating and fully play roles, and the protective coating has the advantages that the protective coating is more stable in performance due to the combined action of the other raw materials in the protective coating; the neodymium-iron-boron composite magnet has excellent and stable water resistance, aging resistance, corrosion resistance and the like.

The invention discloses a preparation method of an antibacterial PEEK material for bone implantation. The preparation method comprises the following steps: carrying out sand blasting treatment on the surface of a PEEK sample; immersing the sandblasted PEEK sample into a mixed solution containing concentrated sulfuric acid and hydrogen peroxide, and carrying out chemical sulfonation treatment; immersing the sulfonated PEEK sample into a dopamine solution, so that dopamine is oxidized and self-polymerized on the surface to form a PDA coating; immersing the PEEK sample with the PDA coating into an antibacterial drug solution, so that the antibacterial drug is loaded on the surface; carrying out heat treatment on the PEEK sample loaded with the antibacterial drug; thoroughly cleaning the sample, removing uncombined antibacterial drug molecules, and drying; through sand blasting treatment and sulfonation treatment, the surface roughness and hydrophilicity of the PEEK material are remarkably improved, and favorable conditions are provided for adhesion of a dopamine coating and an antibacterial agent; due to introduction of the dopamine coating, the biocompatibility and the adhesion of the material are enhanced, and the dopamine coating also serves as an effective carrier of antibacterial drugs, so that the antibacterial function is maximized.

The invention discloses an underground chamber structure of a compressed air energy storage power station, a construction method and a parameter optimization design method, and belongs to the field of compressed air energy storage and underground space engineering. A hard rock stratum building chamber is determined through systematic site selection investigation, a high-performance concrete lining (containing fiber reinforcement) and a polyurethane buffer layer are adopted to synergistically improve the stability, and a vinyl ester resin-based glass fiber reinforced plastic three-layer composite structure serves as a sealing layer (including a bonding layer, a reinforcement layer and an impermeable layer); the processes of sand blasting pretreatment, stepped joint and the like are combined to guarantee the sealing performance; meanwhile, on the basis of a finite element model, structural parameters are optimized by taking the lowest whole life cycle cost as a target and taking strength, deformation, leakage rate and the like as constraints, and a recommended parameter combination of each structural layer is obtained in combination with an orthogonal experimental design and an improved genetic algorithm. The method is suitable for various geological conditions, the safety, economical efficiency and adaptability of the compressed air energy storage power station are effectively improved, and the method is suitable for large-scale application and popularization.

The invention provides a sleeve material for molding an aspheric glass lens and a preparation method of the sleeve material. The method comprises the steps that 1, raw material powder is mixed and dried, tungsten carbide powder and Si3N4 powder are mixed in a ball milling tank in an inert atmosphere to obtain composite powder, and the adding amount of the Si3N4 powder is 1 wt%-15 wt%; (2) die filling; putting the composite powder into a graphite female die, and pre-pressing under the pressure of 5-20 MPa; (3) sintering is conducted, specifically, the mold is placed in an SPS system, the initial axial pressure ranges from 5 MPa to 10 MPa, vacuumizing is conducted till the pressure is 10 Pa or below, gradient heating sintering is conducted, the highest sintering temperature ranges from 1500 DEG C to 1900 DEG C, the highest sintering pressure ranges from 40 MPa to 60 MPa, and after heat preservation is finished, the mold is taken out after cooling; and (4) sampling: carrying out sand blasting treatment on the graphite on the surface of the sample to obtain the sleeve material for molding the aspheric glass lens. The material has a lower thermal expansion coefficient.

The invention relates to a cleaning method for removing pollutants deposited on the surface of a fluoride coating heater. The cleaning method comprises the specific steps that appearance inspection is conducted on a part, and a universal meter is used for detecting a resistor; the binding post part is protected; a white corundum sand material is used for sand blasting and film removal; blowing through an air gun; carrying out deprotection and washing; the heater is right placed in an ultrasonic cleaning tank, deionized water is used for ultrasonic cleaning, and the part is rotated by 90 degrees once every 3 min; wiping with isopropyl alcohol; the part is put into an ultrasonic cleaning tank to be cleaned, the part is rotated by 90 degrees once every 3 min, and whether marks are generated or not is observed; purging with nitrogen; performing drying; performing inspection; and vacuum packaging. The white corundum sand material is used for conducting sand blasting and film removing treatment on the surface of the component, a small amount of residual pollutants on the surface of the component can be rapidly removed, and it is guaranteed that the surface of the component keeps uniform; and the part is rotated once every 3 minutes during ultrasonic cleaning, so that the surface can be controlled not to generate marks due to ultrasonic oscillation.

The manufacturing method comprises the following steps that S1, raw materials, an organic auxiliary agent and pure water are subjected to slurry preparation in a ball milling tank according to the proportion, a boat support splitting part blank is obtained through a slip casting technology, and a boat support splitting part blank is obtained; performing natural drying and hot air drying on the green body to discharge moisture, and then fettling and carving the green body into a boat support splitting part semi-finished product meeting the size requirement; s2, putting the semi-finished product in S1 into an induction furnace, purifying and sintering at high temperature of 2000-2300 DEG C under the protection of inert gas, and obtaining a silicon carbide boat support splitting part biscuit which has the open pore porosity of 8-10% and the strength of more than 70 Mpa and contains a small amount of free carbon after high-temperature purifying and sintering; and S3, splicing the silicon carbide boat support splitting part biscuits, feeding the spliced whole boat support into a vacuum furnace, carrying out high-temperature siliconizing sintering treatment at 1650-1700 DEG C, and carrying out grinding, sand blasting, fine cleaning, impurity removal, ultrasonic cleaning and drying process treatment after discharging to obtain the low-iron-content boat support.

The invention provides a preparation method of an MXene-based alkaline electrolytic water hydrogen production electrode. The preparation method comprises the following steps: 1, pretreatment of a base material: cleaning impurities on the base material, drying, and carrying out sand blasting roughening treatment; secondly, first metal powder and second metal powder are weighed and mixed according to a certain proportion to be guided into a powder mixing machine, vacuum drying is conducted after mixing treatment, third metal powder is prepared, the first metal powder is MAX phase powder, and the second metal powder is one or more of metal simple substances or alloys used for water electrolysis hydrogen production; thirdly, third metal powder is deposited on the surface of the pretreated base material through the plasma spraying technology, and a composite coating is obtained; 4, immersing the base material treated in the step 3 into an activation solution for activation; 5, after activation is finished, the base material is taken out and dried, and then the electrode is obtained.The method optimizes the conductivity and hydrophilicity of the electrode, and the diversity of the morphology of a plasma spraying electrode coating is improved.

The invention discloses a high-strength wear-resistant self-lubricating drill bit for a coal mine and a preparation method of the high-strength wear-resistant self-lubricating drill bit. The preparation process comprises the steps that a drill bit blank is prepared from low-alloy carbon structural steel, a high-strength and high-toughness matrix is obtained through thermal refining, and then sand blasting activation is conducted to clean and coarsen the surface. After diamond particles are subjected to acid pickling pretreatment, metal modified diamond composite powder is obtained through salt bath metal and reduction prefabrication. The preparation method comprises the following steps: mixing MoS2 with the carbon dioxide, spraying the mixture on the surface of a matrix through high velocity oxy-fuel to form a wear-resistant coating, and then improving the density and interface bonding strength of the coating through high-frequency induction instantaneous remelting, thereby finally obtaining the coal mine drill bit with high hardness, strong bonding force and self-lubricating performance. The metal modified diamond composite coating containing the metal transition layer and the MoS2 lubricating phase is constructed on the steel substrate, and a high-frequency remelting process is combined, so that the wear resistance, the bonding strength and the self-lubricating performance of the drill bit are synergistically improved, and the drill bit has the advantages of high strength and toughness matching and low cost.

The utility model discloses a rotary compressor crankshaft machining device which comprises a vertical derusting box, the lower end of the interior of the derusting box is provided with a lower clamping assembly for installing one end of a crankshaft, the upper end of the interior of the derusting box is provided with an upper clamping assembly for installing the other end of the crankshaft, and the upper clamping assembly is driven by a driving device to rotate horizontally. An electric sliding rail is arranged on one side in the rust removal box in the height direction of the rust removal box, a sliding base is arranged on the electric sliding rail, and a sand blasting adjusting assembly is arranged on one side of the sliding base. The lower shaft end of the crankshaft is fixed in the first shaft end clamp, then the first electric rod is started according to the specific length of the crankshaft, and the second shaft end clamp is driven to descend till the second shaft end clamp can clamp the upper shaft end of the crankshaft; the servo motor can drive the two clamps and the crankshaft to rotate longitudinally and axially under the cooperation of the rotating disc and the rotating shaft, and therefore circumferential sand blasting and rust removal can be conveniently conducted on the crankshaft through the spray gun.

The utility model provides a rotary spray gun sandblasting device, which relates to the field of sandblasting cleaning technology, and solves the problem that commonly used sandblasting equipment is usually fixed for sandblasting, which results in the inability to process workpieces of different specifications well, reduces the convenience of using the sandblasting device, and cannot process workpieces of different specifications. A rotary spray gun sandblasting device, comprising: a connecting frame with a circular frame structure design is slidably arranged inside the processing box; through the arrangement of the sandblasting device body and the transmission motor, when the workpiece is sandblasted, the transmission motor will drive the sandblasting device body to rotate inside the connecting frame through the transmission between the transmission shaft A and the transmission shaft B, and the sandblasting head at the bottom of the sandblasting device body will rotate around the workpiece, thereby speeding up the sandblasting speed and improving the processing efficiency to perform sandblasting on multiple sides of the workpiece.

The utility model provides a polishing sand feeding mechanism of a sand blasting and polishing machine, belongs to the technical field of sand blasting and polishing machines, and aims to solve the problem that the mixing efficiency of the sand is influenced as the conventional sand is easy to agglomerate with a solution. Comprising a liquid distribution cylinder, a sand inlet pipe, a liquid inlet pipe, a discharging pipe, a hybrid driving motor, a stirring shaft, a filtering piece, a stirring and mixing mechanism and a distribution anti-blocking mechanism, the sand inlet pipe is fixedly connected to the upper part of the liquid distribution cylinder; the hybrid driving motor is fixedly connected to the lower part of the liquid distribution cylinder; the stirring shaft is rotationally connected to the interior of the liquid distribution cylinder, and the stirring shaft is coaxially and fixedly connected to the upper end of a rotating shaft of the hybrid drive motor; the filter part is arranged at the upper end of the interior of the liquid distribution cylinder and is of a conical filter screen structure; the stirring and mixing mechanism is arranged in the liquid distribution cylinder; and the distribution anti-blocking mechanism is arranged at the upper end of the stirring shaft, so that full mixing of sand and a solution is ensured, caking of the sand is reduced, and uniform mixing of the sand and the solution is ensured.

The invention relates to the technical field of surface engineering, discloses a method and a system for preparing a yttrium fluoride composite ceramic coating through atmospheric plasma spraying, and aims to solve the problems that the yttrium fluoride coating generates a brittle aluminum fluoride layer on the surface of an aluminum substrate due to fluorine ion diffusion, so that the bonding strength is low, and the yttrium fluoride coating is easy to peel off and lose efficacy. The method comprises the following steps: sequentially carrying out mechanical polishing, ultrasonic cleaning and sand blasting roughening on an aluminum base material; preparing composite powder formed by mixing yttrium fluoride, yttrium oxide and nanometer aluminum oxide according to the mass ratio of 75: 20: 5; sequentially depositing a yttrium oxide transition layer, a composite barrier layer and a yttrium fluoride functional layer by adopting atmospheric plasma spraying; and finally carrying out vacuum post-heat treatment. According to the system, through the synergistic effect of the three layers of gradient structures, the transition layer forms an yttrium aluminate metallurgical bonding interface, the barrier layer inhibits fluorine ion diffusion through the dual mechanisms of nanometer aluminum oxide physical barrier and yttrium oxide chemical adsorption, and the functional layer guarantees the plasma erosion resistance. According to the method, the bonding strength of the coating is remarkably improved to 50 MPa or above, the porosity is lower than 3%, stripping is avoided under 500-hour high-energy plasma bombardment, the process cost is reduced by 40%, and the method is suitable for cavity protection of semiconductor etching equipment.

The invention relates to the technical field of spaceflight material forming, in particular to a tension control winding process of a spaceflight carbon fiber composite launch canister, which comprises pretreatment, winding forming, curing and post-treatment. The method comprises the following steps: S1, coating a release agent and a modified coating after processing a core mold, carrying out plasma treatment and eliminating stress; the carbon fiber filaments are soaked in resin containing nanometer components, and are pre-stretched after a hot melting reaction; s2, closed-loop tension control is conducted, winding is conducted according to segmented angles, and modified resin is coated between layers to be overlapped in a crossed mode; s3, stepwise heating and curing, dynamically regulating the pressure and introducing inert gas; and S4, polishing after hydraulic demolding, carrying out sand blasting, carrying out transition layer and ceramic coating, and carrying out multi-dimensional detection. According to the process, the mechanical property and environmental adaptability of the launch canister are improved, the process precision is high, defects are reduced, the forming time is shortened, the rework rate and cost are reduced, the spaceflight requirement is met, and the process is suitable for batch production.

The invention relates to the technical field of coating preparation, in particular to a spraying process of a compact yttrium oxide coating, which comprises the steps of pretreatment, powder activation, matrix surface modification, meltallizing spraying, cooling curing, de-shielding treatment and post-cleaning. Yttrium oxide powder is activated through low-temperature plasma, sand blasting parameters and a high velocity oxy-fuel spraying process are optimized, the porosity of the coating is remarkably reduced to 1.5% or below, and the hardness is improved to 500 HV0.3. Internal stress is reduced in a sectional cooling mode, and balance of coating performance and economical efficiency is achieved in combination with a parameter optimization algorithm based on particle deposition dynamics. The preparation method can meet the requirement of the high-end semiconductor manufacturing field on a high-performance protective coating, and solves the problem of high porosity of a traditional process.

The invention relates to the technical field of ceramic substrates, in particular to a ceramic substrate blank powder coating and sintering process. Comprising the following steps: step 1, uniformly stirring boron nitride powder, terpilenol, ethyl cellulose, butyl benzyl phthalate and phosphate, and grinding to obtain coating powder; step 2, printing powder on the surface of the green body by using a silk-screen printing technology to form a powder pattern; a powder coating green body is obtained; step 3, stacking N powder-coated green bodies to obtain laminated green bodies; 4, the laminated green body is subjected to glue discharging sintering and sand blasting in sequence; and obtaining the ceramic substrate.

The utility model discloses a sand paving guide plate of binder sand blasting 3D printing equipment, which comprises a sand paving assembly, and the sand paving assembly comprises a support frame, a support cylinder, a support column, a support cross beam, a T-shaped groove, a T-shaped slide block and a sand outlet groove. According to the utility model, through the design of the V-shaped groove on the sand guide plate, sand can be more uniformly distributed and flows out through the sand outlet groove, so that the sand can be continuously and uniformly paved in the printing process, and the printing quality is improved; an output shaft is driven to rotate through a bidirectional synchronous motor, so that a gear is driven to move along a toothed plate, then an insertion plate is driven to slide in an insertion groove, the opening and closing number of sand outlet grooves is conveniently and accurately controlled through sliding of the insertion plate in the insertion groove, then the outflow amount of sand materials is controlled, and by controlling the outflow amount of the sand materials, according to the 3D printing requirement, the 3D printing efficiency is improved. And the sand paving thickness is adjusted in real time, and it is ensured that sand of each layer meets the preset requirement.

The invention provides an acoustic signal-based fault early warning method for a pneumatic sand blasting machine for aluminum profile processing, which relates to the field of fault early warning, and realizes high-precision early warning for the fault of the pneumatic sand blasting machine by fusing acoustic signals and vibration signals and constructing a multi-dimensional energy difference model and a linkage interference index system. The method is especially suitable for abnormal recognition and fault diffusion monitoring in a complex environment in the aluminum profile machining process. By constructing the fault evolution matrix and the high-risk path chain, the propagation trend of disturbance is effectively captured, so that the time-space evolution characteristics of the fault can be recognized and quantified in real time, and the operation stability of the sand blasting equipment and the perspectiveness of fault prediction are remarkably improved.

The invention discloses a preparation process of a sintering kiln silicon carbide guide roller with thermal shock resistance and high-temperature corrosion resistance. The process comprises the following steps: sequentially carrying out surface pretreatment such as reticulate pattern laser engraving, sand blasting and cleaning and drying on a silicon carbide guide roller substrate; performing plasma spraying on a pure aluminum oxide coating after preheating; carrying out segmented laser remelting on the coating to improve the compactness; and finally, coating the nano silicon carbide slurry, calcining and curing. The thermal shock resistance and the high-temperature corrosion resistance of the guide roller are remarkably improved by enhancing the binding force of the coating through laser engraving, optimizing the density of the coating through laser remelting and combining post-treatment of nano silicon carbide slurry, and the service life of the guide roller in a lithium battery positive electrode material sintering kiln is prolonged.

The invention belongs to the technical field of hot rolled strip residual stress control, and particularly relates to a sand blasting device of a hot rolled strip residual stress online regulation and control system, a using method of the sand blasting device and the hot rolled strip residual stress online regulation and control system. The non-uniform residual stress value information of the hot rolled strip is obtained through the obtaining mechanism and transmitted to the determining mechanism, and the determining mechanism determines the sand blasting operation information based on the preset relation between the non-uniform residual stress value information and the sand blasting operation information of the sand blaster; and the control system regulates and controls the sand blasting angle of the sand blaster based on the sand blasting operation information and controls the sand blasting parameters of the sand blaster, the sand blaster sprays sand grains to the hot-rolled strip, and the stress of the hot-rolled strip is regulated and controlled. According to the method, non-uniform residual stress in the production process of the hot-rolled strip is regulated on line, operation is convenient, targeted regulation can be conducted on the part with the large difference value, the strip does not need to be damaged, heat treatment does not need to be conducted on the strip again, and time and labor are saved.

The invention relates to a preparation method of a corrosion-resistant radial gradient porous bionic bone scaffold, and belongs to the technical field of medical machinery. According to the method, firstly, the offset C is redesigned according to the relation between a Gyandroid unit cell mathematical formula S (x, y, z) and the offset C, so that the mathematical formula is improved, and the mathematical formula is suitable for the radial gradient porous scaffold. An improved mathematical formula is adopted, a radial gradient porous cuboid model is generated by utilizing a Python script, and a cylindrical radial gradient porous model is obtained through Boolean intersection operation. Then, the model is subjected to smoothing and repairing treatment, and an initial radial gradient porous scaffold is prepared through a selective laser melting (SLM) forming technology; finally, through sand blasting treatment, the finished radial gradient porous bionic bone scaffold is obtained. The uniform porous scaffold has higher corrosion resistance, longer service life and larger specific surface area, is more beneficial to transmission, survival and attachment of bone cells, and has better performance compared with a traditional uniform porous scaffold.

The invention belongs to the technical field of titanium-steel composite plates, and particularly relates to a production process for preventing grain growth of a titanium-steel composite plate, which comprises the following steps: roughening the lower side surface of a titanium plate and the upper side surface of a steel plate by adopting a sand blasting process; an additive is sprayed to the upper side face of the steel plate and the lower side face of the titanium plate, the additive comprises boron powder and a binding agent, graphite foil is laid on the upper side face of the steel plate sprayed with the additive, the titanium plate sprayed with the additive is stacked on the steel plate, and the graphite foil is clamped by the upper side face of the steel plate and the lower side face of the titanium plate to prepare a composite plate blank; sealing the edge part of the composite plate blank by using a sealing material; the production process comprises the following steps: heating a composite plate blank through a heating furnace, rolling and cooling the heated composite plate blank, straightening the composite plate blank through a straightening machine, and trimming the straightened composite plate blank to obtain the titanium-steel composite plate. And the bonding strength and the shearing strength of the titanium steel composite plate are improved.

The invention discloses a spiral water channel sand core integral positioning hot core box which comprises a base and a spiral water channel sand core, a sand shooting device is installed on the upper portion of an upper mold, a transverse moving mechanism is installed at the bottom of a supporting plate and used for driving the upper mold to transversely move, an air duct is fixedly installed on the upper portion of the upper mold, and the lower end of the air duct penetrates through the bottom of the upper mold. A negative pressure fan is fixedly installed on the supporting plate, the air draft end of the negative pressure fan is communicated and connected with the air duct through a hose, positioning pipes are fixedly installed at the two ends of the spiral water channel sand core, and rear sticky blocks are arranged on the inner sides of the side molds and connected with the positioning pipes at the corresponding positions in an inserted mode. The upper mold can be controlled to move through the transverse moving mechanism, so that the position of the sand shooting device is adjusted, during sand shooting, air suction is conducted on the interior of the cavity through the negative pressure fan, fine sand in a hot core box can be sucked out, the forming quality of spiral water channel sand blasting is guaranteed, meanwhile, a spiral water channel sand core is bonded through the rear bonding block, and the production efficiency is improved. The positioning precision of the spiral water channel sand core can be ensured, and the operation labor intensity is reduced.

The invention relates to the technical field of perforation well completion and reservoir transformation, in particular to a self-anchoring depth-setting penetrating sand blasting perforation and plug removal integrated device and a using method. According to the technical scheme, an upper leather cup and a lower anchoring leather cup are arranged on the outer wall of the lower middle portion of a pump body outer pipe, a hydraulic self-anchoring device is arranged between the upper leather cup and the lower anchoring leather cup, a perforation nozzle is arranged on the lower side of the lower anchoring leather cup, and a returned sand liquid inlet is formed in the bottom of the pump body outer pipe; the top of the center pipe assembly is provided with a sand filtering flow dividing body, the middle of the center pipe assembly is connected with the pump body outer pipe through a bridge type flow guiding device, a nozzle, a diffusion cavity and a mixed liquid discharging flow channel are formed between the pump core and the inner wall of the center pipe assembly, and the lower end of the mixed liquid discharging flow channel is communicated with the mixed liquid outlet. The anti-creeping sand blasting perforation device has the beneficial effects that the anti-creeping function during sand blasting perforation can be realized, deep penetration sand blasting perforation can be realized, and the wall surface of a shot hole is smooth and regular and does not damage a sleeve; operation is easy and convenient, construction is simple and reliable, and economy and efficiency are achieved.

The invention relates to the technical field of oil and gas well completion sand prevention, in particular to a sand blasting perforation and sand prevention integrated combined operation device and a construction method. According to the technical scheme, a central pipe is installed in the center of an inner cavity of a jet pump assembly, the lower end of the central pipe extends out of the jet pump assembly, a liquid suction opening is formed in the lower middle portion of the jet pump assembly, a liquid outlet is formed in the outer wall of an upper connector, and a mixing cavity and a diffusion cavity are formed between the jet pump assembly above the liquid suction opening and the central pipe. An outlet of the diffusion cavity is communicated with the liquid outlet; the inner side of the central pipe is movably connected with a lower sliding sleeve; a nozzle is mounted on the jet pump assembly outside the lower flow transfer hole; and the inner side of the upper flow transfer hole of the central pipe is movably connected with a middle sliding sleeve. The method has the beneficial effects that the three processes of sand blasting perforation, blockage removal after perforation and ground filling sand prevention are completed by tripping in the tubular column once, so that the times of tripping the tubular column and using ground construction equipment are reduced, the construction efficiency is improved, the construction cost is saved, and the well control risk in the construction process is reduced.

The present invention discloses a high-pressure water jet plate and strip material cleaning device and a water jet cleaning line, wherein the high-pressure water jet plate and strip material cleaning device comprises a cleaning chamber, a flushing chamber, an abrasive tank, an abrasive collection box and a nozzle for spraying and cleaning the plate and strip material, the flushing chamber is arranged at the output end of the cleaning chamber, the abrasive collection box is arranged below the plate and strip material, the nozzle is connected to the abrasive tank arranged above the cleaning chamber, the nozzle faces the same width direction of the plate and strip material and is arranged in a gradient along the conveying direction of the cleaning chamber to cover the plate and strip material with a spray. The plate and strip material high-pressure water jet sandblasting cleaning device of the present invention has a simple and compact structure, low cost, convenient conveying, simple operation, high production efficiency, good surface cleaning effect, and the surface abrasive is easy to rinse and collect after cleaning without pollution.

The invention relates to the field of material surface treatment, and discloses a silica gel and metal combined treatment process which comprises the following steps: S1, ultra-short pulse laser is adopted to machine a three-dimensional micro-nano composite structure on the surface of a titanium alloy, the structure comprises a periodic groove array and surface nano holes, and the surface roughness Ra of the titanium alloy is larger than or equal to 5 microns; and S2, a titanium nitride transition layer and a siloxane self-assembly molecular layer are sequentially formed on the roughened titanium alloy surface through atomic layer deposition, and a gradient chemical interface is formed. According to the method, the micro-nano composite structure is processed through ultra-short pulse laser, the interface mechanical embedding area is remarkably increased, the two-dimensional rough limitation of a traditional sand blasting process is broken through, deep barb-shaped anchoring is achieved, the anti-stripping capacity is greatly enhanced, gradient chemical bonding is formed by the atomic layer deposition titanium nitride transition layer and the amino self-assembly molecular layer, and the anti-stripping performance is improved. The thermal expansion difference is effectively buffered, and the interface high-temperature resistance is improved.

The utility model provides a surface pretreatment device for steel plate processing, which relates to the technical field of steel plate processing and comprises a base, a support beam is fixedly mounted on the top surface of the base, a cylinder is fixedly mounted on the top surface of the support beam, a sand blasting cavity is mounted at the output end of the cylinder, and the bottom surface of the sand blasting cavity is communicated with a sand blasting gun. And the top face of the sand blasting cavity communicates with a material guiding pipe and a draught fan, the top face of the base is rotationally connected with a rotating column, and a steel plate fixing table is fixedly installed at the top end of the rotating column. The steel plate fixing table is driven to rotate through a transmission mechanism of the worm and the worm wheel, so that a steel plate can uniformly rotate in the sand blasting process, the surface of the steel plate can be in full contact with sand blasting, insufficient sand blasting in a local area is avoided, and the overall rust removal effect is improved; and the rotating steel plate fixing table enables the sand blasting spray gun to cover the whole surface of the steel plate in a more efficient manner, so that the sand blasting operation time is shortened, and the working efficiency is improved.

The invention discloses a sand blasting machine for tubing coupling machining, and relates to the technical field of sand blasting equipment. A raw material box is fixedly connected to the top end of the shell, an upper sand blasting pipe is connected to the top side of the raw material box in a penetrating mode, a butt joint hose is connected to the side of the raw material box in a penetrating mode, meanwhile, a side sand blasting pipe is connected to the outer end of the butt joint hose in a penetrating mode, the side sand blasting pipe is slidably connected to the side of the shell, and a fixing frame is fixedly connected to the bottom side of the interior of the shell. According to the sand blasting machine for tubing coupling machining, when a side sand blasting pipe moves, a butt joint disc and an abutting disc can be synchronously driven to move, the outer end of a tubing coupling extrudes an abutting air bag arranged on the inner side of the abutting disc, air in the abutting air bag enters an expansion air bag through a communicating pipe, and the expansion air bag is expanded; the internal threads of the tubing coupling can be protected and blocked through the expansion air bag, and the possibility that the internal threads of the tubing coupling are abraded due to the sand blasting effect and the follow-up butt joint stability is affected is reduced.

The invention relates to the field of precision casting, and discloses a precision casting process for a stainless steel impeller for nuclear power, which comprises the following steps of: S1, pressing a wax mold by using an investment casting process, and connecting the wax mold into a tree shape by using a wax rod; s2, the surface of the wax mold is coated with a refractory material, dewaxing is conducted through dewaxing equipment after drying, a hollow shell is obtained, and then high-temperature roasting is conducted; s3, selecting duplex stainless steel to be smelted in an electric furnace, heating molten steel to a preset pouring temperature, and pouring the molten steel into the shell from the bottom or the side; s4, the shell is removed after being naturally cooled, and solution treatment is conducted on the impeller; s5, carrying out sand blasting, shot blasting and sand cleaning, and carrying out nondestructive inspection; wherein dewaxing equipment used in the step S2 comprises a tank body, a rotatable tray is arranged in the tank body, and a plurality of adjustable fixing clamps are arranged on the tray to meet the fixing requirements of different shells; the top of the tank body is provided with a feed port, a discharge port and an automatic sealing door, and the bottom is connected with a wax liquid collecting tank and is internally provided with a liquid level sensor; the inner wall of the tank body is provided with a heating cavity for containing heating elements, and the outer wall is wrapped with heat insulation materials.