202results about How to "Freeze fast" patented technology

The invention relates to the technical field of laser tapping, in particular to a portable steel pipe laser tapping machine. Comprising a laser cutting head, a driving motor, a mounting cylinder, a connecting plate, a compression spring, a fixing assembly and the like, the laser cutting head is slidably connected with the mounting cylinder, the connecting plate is connected to the outer wall of the laser cutting head, the compression spring is connected with the mounting cylinder and the connecting plate, and the fixing assembly is used for fixing the position of the driving motor. And then the driving motor drives the mounting cylinder to rotate, and the laser cutting head can be driven to rotate with the output shaft of the driving motor as the center point so as to accurately draw a circle and open a hole in the surface of the steel pipe body. The position of the driving motor can be fixed through the switch magnetic base, then through the action of the driving motor, the laser cutting head can be driven to rotate with the output shaft of the driving motor as the center point to conduct precise circle drawing and trepanning on the surface of the steel pipe, in this way, the situation of trepanning deformation can be prevented, and the trepanning effect is guaranteed.

The invention provides a hybrid welding method. The hybrid welding method comprises the following steps that the surfaces of a first to-be-welded part and a second to-be-welded part are cleaned; the welding interface of the first to-be-welded part and the second to-be-welded part is coated with a brazing material, and the first to-be-welded part and the second to-be-welded part are clamped to form a to-be-welded assembly; the to-be-welded assembly is fed into a vacuum brazing furnace to be brazed, a brazing material is cooled and solidified to form a brazing layer after being heated and melted, the brazing layer is connected with the first to-be-welded part and the second to-be-welded part, and a brazed welding part is obtained; and the brazing welding part is taken out of the vacuum brazing furnace, laser is focused on a brazing layer of the brazing welding part, the laser conducts scanning welding according to a preset track, and a welding part is obtained. The method can reduce the requirement of the component on the surface machining precision of the to-be-welded part and the requirement on the assembly process precision, can simplify the process, reduces the production cost, and improves the production efficiency.

The utility model discloses a branch pipeline utilizing a centrifugal pump to adjust flow, which comprises a main water tank, a water outlet pipe is arranged at the bottom of the main water tank, the side face of the water outlet pipe is connected with a water outlet branch pipe through a centrifugal pump, and a return pipe is connected between the water outlet branch pipe and the upper end of the main water tank. According to the utility model, the combination of the return pipe and the flow velocity sensor is introduced, so that unstable water flow can be automatically guided back to the main water tank at the initial stage of starting of the centrifugal pump, and the damage to the water outlet branch pipe caused by water flow impact is effectively avoided. By means of the design, the aging speed of the pipeline is remarkably reduced, the service life of the pipeline is prolonged, and the maintenance cost and the water cut-off time caused by pipeline damage are reduced.

The invention provides an invar alloy and a rheoforming method thereof, and relates to the technical field of invar alloy production processes. The rheoforming method of the invar alloy comprises the following steps that alloy raw materials are sequentially subjected to smelting and tundish treatment, and alloy melt is obtained; the superheat degree of the melt is controlled, the alloy melt is subjected to thin-strip continuous casting, and a thin strip is obtained; and the thin strip is sequentially subjected to soaking treatment and rolling deformation, and an invar alloy product is obtained. The rheoforming technology is adopted, the invar alloy can be rapidly solidified, the surface of a casting strip is smooth and free of vibration marks, slag inclusion, flash and the like, segregation of inclusion elements to the grain boundary can be effectively restrained, and oxidation of the casting strip is reduced, so that the hot rolling procedure is shortened or even omitted, the problem of cracking in hot working is fundamentally avoided, the production efficiency and the yield are effectively improved, and the production cost is reduced. Therefore, energy consumption is reduced, production cycle is shortened, and production cost is reduced.

The invention discloses a method for preparing a metal casting mold based on steel grit 3D printing, and belongs to the technical field of metal casting mold machining. In order to solve the technical problem that in the prior art, the mechanical strength and collapsibility of a metal casting mold need to be further improved, the method for preparing the metal casting mold based on steel grit 3D printing comprises the following steps that a sand mold three-dimensional model is established according to a metal casting, then casting mold steel grit is filled in an operation box of sand mold 3D printing equipment, and the casting mold steel grit is obtained; the binder storage tank is filled with a binder; and according to the section formation of the sand mold three-dimensional model, a sand paving system of the sand mold 3D printing equipment paves cast steel sand on a printing platform. The casting steel sand and the binder are matched with each other, the metal casting mold blank is prepared through 3D printing and then dried, the normal-temperature mechanical property and high-temperature property of the metal casting mold are effectively improved, the application range of the metal casting mold is widened, and meanwhile the collapsibility of the metal casting mold is improved.

The invention discloses a process for processing a corrosion-resistant aluminum alloy pipe through laser cladding, which comprises the following steps of: performing laser cladding on a formed aluminum alloy pipe, transmitting a laser beam to the surface of the aluminum alloy pipe, conveying cladding layer powder / alloy wires to a laser area, quickly melting the cladding layer powder / alloy wires and the surface of the aluminum alloy pipe together through the laser beam, and solidifying, thereby obtaining the corrosion-resistant aluminum alloy pipe. The cladding layer combined with the aluminum alloy pipe is formed on the surface of the aluminum alloy pipe, cladding layer powder / alloy wires are made of zinc or zinc alloy, the cladding layer serves as a sacrificial anode, a thin and compact oxide and hydroxide layer is formed on the surface of the aluminum alloy pipe, further oxidation reaction is effectively prevented, and the corrosion resistance and reliability of the aluminum alloy pipe are improved. And the laser cladding procedure can be accurately controlled by controlling the laser power of the laser beam, the spot diameter, the passing speed of the aluminum alloy pipe and the speed of conveying cladding layer powder / alloy wires, so that the cladding layer has the advantages of being small in dilution degree, compact in structure, good in combination with the aluminum alloy pipe and not prone to falling off.

The invention discloses a gas-liquid composite auxiliary device for laser processing, and belongs to the technical field of material processing, the gas-liquid composite auxiliary device for laser processing comprises a liquid jet module, the liquid jet module comprises a liquid storage shell, one end of the liquid storage shell is provided with a liquid guide pipe, the other end of the liquid storage shell is used for being connected with a laser processing head, and laser emitted by the laser processing head acts on the surface of a workpiece through the liquid guide pipe; the liquid storage shell is communicated with a liquid inlet assembly; and the gas jet module comprises a gas outlet pipe, the gas outlet pipe and the liquid guide pipe are coaxially arranged, the liquid guide pipe is sleeved with the gas outlet pipe, a gap is formed between the gas outlet pipe and the liquid guide pipe, and the gas outlet pipe communicates with a gas inlet assembly. The composite mode of combining gas and liquid is adopted, slag generated by laser processing can be efficiently cleaned, cleanliness of a processing area is guaranteed, the cooling effect can be further improved, heat affected zones generated by laser processing are reduced, and therefore the influence of laser processing on the overall performance of materials is reduced.

The invention belongs to the technical field of metal materials and radiation protection, and particularly relates to a preparation method of thermal neutron shielding steel. According to the method, efficient spray forming of the B4C / 304 stainless steel composite material is achieved through a gas-solid two-phase flow driving mechanism under the negative pressure environment, B4C ceramic particles are evenly dispersed and embedded into a 304 stainless steel matrix, and due to the strong driving force of gas-solid two-phase flow, firm interface bonding is formed between the B4C particles and the matrix. According to the process, gas atomization and solid-phase medium particles are combined, a gas-solid two-phase mixed flow is formed, the atomization efficiency is greatly improved, the powder particle size is refined, reinforced phase distribution is optimized, and a new way is opened up for preparation of the high-performance thermal neutron shielding steel composite material.

The invention discloses a continuous casting device and method for manganese-series iron alloy, and the continuous casting device comprises a casting ladle, a crystallizer arranged below the casting ladle, a tundish arranged between the casting ladle and the crystallizer, a transportation mechanism arranged on one side of the crystallizer, and a throwing machine arranged between the crystallizer and the transportation mechanism. The collecting box is arranged on the side, away from the throwing machine, of the conveying mechanism, the cutting mechanism is arranged between the conveying mechanism and the throwing machine, a vibration mechanism and a liquid cooling unit are arranged on the crystallizer, and an air cooling unit is arranged at the top of the conveying mechanism; the ferromanganese alloy is prepared through the continuous casting process, the ferromanganese liquid only needs 50-60 s from casting to solidification, rapid solidification is achieved, the uniformity of components of the ferromanganese alloy is greatly improved, the product quality is improved, the related ferromanganese continuous casting process continuously produces casting blanks from the liquid ferromanganese liquid, the working procedures of water spraying cooling and jaw breaking are reduced, the production period is shortened, and the production cost is reduced. Manpower and equipment investment is saved, and the production efficiency is improved.

The invention discloses a liquid nitrogen-liquid carbon dioxide combined stratum freezing system which comprises a liquid carbon dioxide freezing mechanism and a liquid nitrogen cooling mechanism, the liquid carbon dioxide freezing mechanism comprises a carbon dioxide circulating pipeline, and a liquid nitrogen structure comprises a nitrogen storage tank, a liquid nitrogen conveying pipe and an exhaust pipe which are connected and matched with one another. The control device can control the liquid nitrogen cooling mechanism to work and convey liquid nitrogen into the freezing pipe so that the stratum can be rapidly cooled, and then control the liquid carbon dioxide freezing mechanism to work and convey liquid carbon dioxide into the freezing pipe so that the carbon dioxide can be recycled so that the stratum can be rapidly frozen. Therefore, the liquid carbon dioxide freezing mechanism and the liquid nitrogen cooling mechanism are combined to cool and freeze the stratum, the cooling and freezing efficiency can be effectively improved, and meanwhile the cost of freezing by independently using liquid nitrogen is reduced.

The invention belongs to the technical field of valve sealing element coating and plating processes, and discloses a special valve hard sealing element dissimilar material coating and plating process which comprises the following steps: S1, surface pretreatment; s2, coating of a bottom layer coating; s3, coating of an intermediate coating; s4, coating of a top layer coating; s5, quality detection and control; the surface pretreatment comprises cleaning, mechanical treatment, acid pickling and passivation, the coating of the bottom coating comprises nickel plating treatment and chromium plating treatment, the coating of the middle coating comprises ceramic coating and coating curing, and the coating of the top coating comprises tungsten carbide coating and coating heat treatment. The quality detection and control comprises coating thickness testing, adhesive force testing, corrosion resistance testing and wear resistance testing. According to the method, a compact and hard ceramic coating is formed through curing treatment, so that the high temperature resistance of the sealing element is improved, and the wear resistance and corrosion resistance of the sealing element are further enhanced.

The invention relates to a preparation method of marine concrete for underwater self-flowing cemented block stone and the marine concrete. The preparation method comprises the following steps: acquiring component information of reference concrete; according to the expected initial setting time and the expected final setting time of the marine concrete, the amount of quick-hardening cement for replacing the Portland cement is determined; according to the particle size range of the dimension stone in the dimension stone accumulation body, the maximum particle size and grading of coarse aggregate in the gravel aggregate are obtained through calculation; according to the single-time pouring amount of the maritime work concrete and the diameter of a pouring pipe, the expected flowing depth of the block stone accumulation body in water and the expected diffusion diameter of the surface of the block stone accumulation body are calculated, and the expected expansion degree of the maritime work concrete in water is determined; obtaining component information of the marine concrete; and preparing the maritime work concrete according to the component information of the maritime work concrete. According to the scheme provided by the invention, the anti-scouring effect of the cementation block stone under continuous scouring of water flow can be improved, so that the concrete is good in fluidity in the pouring process, and the concrete can be rapidly solidified after being poured.

The invention relates to the technical field of iron-silicon-aluminum powder production, in particular to an iron-silicon-aluminum powder production device based on a gas atomization method powder.The iron-silicon-aluminum powder production device comprises a supporting frame, a reaction barrel is fixedly connected to the inner side of the supporting frame, a fixing rod is annularly and fixedly connected to the inner wall of the reaction barrel, and a fixing ring is fixedly connected to the inner side of the fixing rod; a motor is fixedly connected to the inner wall of the fixing ring, a first screw rod is fixedly connected to the output end of the motor, a rotating rod is fixedly connected to the top of the first screw rod, a tray is slidably clamped to the outer surface of the bottom of the rotating rod, and scraping plates are symmetrically and fixedly connected to the lower surface of the tray. The metal liquid extends into a sheet shape to fly out under the action of centrifugal force, and at the moment, the tray can also drive the metal liquid to move upwards, so that the metal liquid on the tray is closer to the gas collecting ring, and the high-speed gas flow can more effectively impact the metal liquid and crush the metal liquid into smaller and more uniform liquid drops.

The utility model relates to the field of paper cup bonding forming devices, and discloses a coating paper cup bonding forming device which comprises a supporting mechanism, a motor is fixedly arranged at the upper end of the supporting mechanism, a bonding mechanism is fixedly arranged in the middle of the supporting mechanism, and an auxiliary mechanism is fixedly arranged at the lower end of the supporting mechanism. A heat absorption box is fixedly arranged on the front face of the auxiliary mechanism, a fan is fixedly arranged in the heat absorption box, a conveying pipe is fixedly arranged at the output end of the fan, and a fixing block is fixedly arranged on one side of the middle position of the front face of the supporting mechanism. According to the device, through the arrangement of the motor, the fixing plate, the supporting column, the working table, the containing groove, the rotating column, the air cylinder and the rotating disc, a user can sleeve the outer surface of the supporting column with a cup body and place the cup bottom into the containing groove, and at the moment, the working table can be driven to ascend and descend through the operation of the air cylinder; the supporting columns are inserted into the containing grooves so that the cup body can make contact with the cup bottom.

The quick-freezing warehouse comprises a warehouse body, a goods shelf trolley, a heat exchanger and an axial flow fan are arranged in the warehouse body, the axial flow fan sucks low-temperature airflow of the heat exchanger and forcibly conveys the low-temperature airflow to an air inducing device, and the high-pressure low-temperature airflow vertically enters an air guiding device after the airflow direction is changed through the air inducing device. Horizontal airflow guided layer by layer through the air guiding device enters the air guiding grating, the air guiding grating is arranged in a modularized mode, and low-temperature airflow blown out of the air guiding grating is evenly blown to each layer of frozen products on the goods shelf trolley. According to the utility model, the air duct system of the quick-freezing storage is optimized, so that frozen products in the storage are uniformly blown, the freezing time is shortened, and the energy consumption is reduced; products of different specifications can be frozen at the same time and can be independently adjusted in different areas. According to the utility model, small-batch quick freezing can be realized, when small-batch goods are warehoused, the grating plates in other areas are closed, centralized blowing heat exchange is carried out on the goods placing area, the local air volume is improved, and the freezing time is shortened.

The invention relates to a film sintering high-frequency automatic moving device which comprises a mounting frame, a sintering high-frequency machine is fixed to the outer wall of the middle of the mounting frame, a driving wire feeding roller and a driving wire collecting roller are distributed and mounted on the outer walls of the two ends of the top of the mounting frame, and a guide seat is fixed to the outer wall, located between the sintering high-frequency machine and the driving wire feeding roller, of the mounting frame. A guide groove is formed in the outer wall of the top of the guide seat, and a mounting frame is fixed to the outer wall of one side of the top of the guide seat. The sintering uniform cooling assembly is arranged, an arc cover fixedly covers the top of the water storage tank, an upper guide wheel and a lower guide wheel are matched to guide and convey an electromagnetic wire, the problem that the electromagnetic wire is bent and wrinkled is avoided, a driving wire feeding roller can drive a turbine pump to work, cooling water in the water storage tank is pumped, and the cooling effect of the electromagnetic wire is improved. And the liquid is pumped into the arc cover through the liquid pumping pipe, is sprayed and discharged through the spraying holes, and is sprayed on the outer wall of the conducting and conveying electromagnetic wire in the arc cover, so that a thin film formed after the electromagnetic wire is sintered is quickly cooled.

The utility model provides an antifouling radar material liquid level meter probe, which relates to the technical field of liquid level measuring equipment and comprises a radar material liquid level meter probe body, and an external thread mounting pipe is fixedly sleeved on the surface of the bottom of the radar material liquid level meter probe body. According to the utility model, a worker can regularly start the motor and open the electric valve through the external controller, and precipitates and dirt adsorbed on the surface of the fluoroplastic lens are scraped in the rotating process of the scraping block, so that the measurement accuracy of the radar liquid level meter is prevented from being influenced by the precipitates and dirt formed inside the reaction kettle after long-term work; meanwhile, water in the water conveying pipe passes through the water conveying header pipe, the electric valve, the water conveying branch pipes and the nozzles and is sprayed out from the multiple nozzles, sediments and dirt scraped off the surfaces of the fluoroplastic lens and the electric valve are removed, and the situation that the sediments and the dirt are rapidly solidified and continue to be adsorbed on the surface of the fluoroplastic lens due to the fact that the scraped sediments and the dirt are not cleaned in time is avoided.

The present invention discloses a casting mold with rapid and uniform cooling and a manufacturing method thereof. The casting mold cavity is composed of a mold block and a powder metallurgy composite surface layer. The mold block is a porous metal block formed by sintering metal wires, which is machined to obtain a shape that matches the upper mold and the lower mold, and its entire surface is covered with a metal powder composite surface layer; the upper mold and the lower mold are respectively equipped with a cooling fluid inlet pipe and a cooling fluid outlet pipe; the cooling fluid inlet pipe is connected to the cooling fluid inlet, communicates with the mold block, and forms a cooling fluid channel with the cooling fluid outlet pipe. This manufacturing method includes pressing and sintering of a metal block, preparation of a powder metallurgy composite surface layer, and rolling extrusion. The present invention has a simple structure, a convenient manufacturing method, is easy to implement, and has a low production cost; it significantly improves the heat exchange efficiency between the fluid and the mold, realizes rapid solidification of the forming material, and improves production efficiency; and has good market application prospects.

The present invention provides a laser glaze repair machine for ceramics, which relates to the technical field of glaze repair. The laser glaze repair machine for ceramics includes two I-shaped support frames, which are arranged in parallel front and back, and the upper ends of the two I-shaped support frames are both installed with linear guide rails A, and also includes a protective bottom shell, which is located between the two I-shaped support frames, and both ends of the protective bottom shell are fixedly installed with linear guide rails B, which are perpendicular to the linear guide rails A, and the protective bottom shell is rotatably installed on the two I-shaped support frames. The laser glaze repair machine for ceramics can avoid various problems such as glaze liquid imbalance, convex points, and roughness in existing laser glaze repair by setting a variable track glaze blowing component and a laser emission component, reduce the number of grinding times, and can maximize the use of glaze strips. The angle of the porcelain can change with the angle of the laser emission component, and the effect of automatic glaze repair can be achieved.

The present invention relates to a multi-arm polyethylene glycol gel and a preparation method thereof, and belongs to the technical field of gel preparation. The preparation method of the multi-arm polyethylene glycol gel of the present invention is to form an anhydride structure by DCC condensation and dehydration of multi-arm polyethylene glycol acetic acid. The multi-arm polyethylene glycol gel of the present invention is a gel of a new structure, with a carboxylic acid group at the end, and is prepared in a non-aqueous phase system, so there is no situation where the active end loses its reactivity, and the prepared gel has good mechanical properties, stable chemical properties, and a wide range of applications. The preparation method of the multi-arm polyethylene glycol gel provided by the present invention has a non-aqueous phase reaction system and a fast gelation rate.

The utility model discloses a quick freezing device for food, which belongs to the technical field of food freezing and comprises a freezing chamber, a freezing cavity is vertically arranged in the freezing chamber, a feed port and a discharge port are arranged on the lateral side of the freezing chamber, and driving components for driving food to move upwards are symmetrically arranged in the freezing cavity. The two symmetrically-arranged driving assemblies are started synchronously, a plurality of spray head sets used for spraying liquid nitrogen are arranged in the freezing cavity and are arranged in the vertical direction, a storage box used for storing the liquid nitrogen is arranged at the top of the freezing chamber, the bottom of the storage box is connected with a discharging pipe, the discharging pipe communicates with each spray head set, and the spraying head sets are arranged in the storage box. The utilization rate of liquid nitrogen can be improved.

The utility model relates to the technical field of lead storage battery production, in particular to lead storage battery cast welding equipment. Comprising a battery clamping assembly, a bottom plate is arranged below the battery clamping assembly, a lead pan is fixed to the upper end of the bottom plate, a vertical lower air cylinder is fixed to the portion, on one side of the lead pan, of the bottom plate, an inverted-L-shaped connecting rod is fixed to the telescopic end of the lower air cylinder, a cast-weld mold is fixed to the connecting rod, a support is fixed to the portion, on the other side of the lead pan, of the bottom plate, and a motor is fixed to the upper end of the support. A rotating rod is concentrically fixed to an output shaft of the motor, a scraping rod is fixed to the upper end of the rotating rod, a fixing plate is fixed to one side of the rotating rod, a connecting plate is arranged on the rotating rod below the fixing plate in a sliding mode, the fixing plate is connected with the connecting plate through a vertical lifting air cylinder, and a cooling plate is fixed to the connecting plate. A motor is adopted to drive a scraping rod and cooling plate linkage structure, after the scraping rod scrapes redundant lead liquid on the surface of a mold in real time, the cooling plates designed in a staggered mode can immediately conduct directional cooling on the cast-weld mold, and the production takt time is remarkably shortened.

The present invention discloses an evaporator with passive defrosting, the evaporator comprising: an evaporator body, the evaporator body comprising a first end and a second end; fins, the fins being arranged on the evaporator body and extending from the first end to the second end of the evaporator body; fin grooves, the fin grooves being arranged on the fins and extending from the first end to the second end of the evaporator body; a water distribution tray, the water distribution tray being arranged on the first end of the evaporator body and being connected to the fin grooves. The present invention solves the technical problems that the defrosting method adopted in the prior art has high energy consumption, safety risks, complex structure and cumbersome operation due to the reduced heat exchange efficiency of the evaporator caused by frosting, and has the effect of preventing the evaporator from reducing the heat transfer efficiency due to frosting and being safe and energy-saving.

The invention discloses a hardware bed frame paint spraying device and a using method, relates to the technical field of hardware bed frame machining, and provides the following scheme aiming at the problems that an existing hardware bed frame paint spraying device often needs workers to manually spray paint on hardware raw material pipe fittings, the paint spraying efficiency is low, and paint spraying is uneven. A box is installed at the top of the workbench, a partition plate is arranged in the center of the interior of the box, a paint spraying chamber is formed in one side of the partition plate, a drying chamber is formed in the other side of the partition plate, the paint spraying chamber and the drying chamber are both installed in the box, baffles are arranged on the two sides of the workbench, a row roller is connected below the position between the baffles, and a conveying roller is arranged above the row roller. And feeding and discharging mechanisms are mounted on the two sides of the box body. The hardware raw material pipe fitting paint spraying device is novel in structure, hardware raw material pipe fittings are automatically fed, discharged and conveyed, spraying is more comprehensive, the hardware raw material pipe fittings are dried after spraying is completed, and the paint spraying quality of the hardware raw material pipe fittings is improved.

The utility model relates to the technical field of food quick-freezing feeding, in particular to a bean food quick-freezing vibration feeding device which comprises a machine frame body, a material conveying assembly is supported between the two ends of the machine frame body, a vibration assembly is fixedly installed above a first supporting frame, and the vibration assembly comprises a motor, a fixing base, a rotating shaft, a fixing rod, a fixing block, a transmission rod and a knocking rod. The fixing seats are fixedly installed at the two ends of the upper portion of the first supporting frame and located on the bottom side of the motor, one ends of the rotating shafts are movably installed at the centers of the fixing seats, the fixing rods are fixedly installed at the other ends of the rotating shafts, the fixing rods are fixedly installed at the two ends of the fixing blocks in a clamped mode, and one ends of the transmission rods are fixedly installed on one sides of the fixing blocks. A knocking rod is fixedly mounted at the other end of the transmission rod. According to the utility model, the material conveying assembly is knocked through the connecting rod mechanism driven by the motor of the vibration assembly, the vibration is beneficial to the transportation of bean dreg food, the soybean milk content in bean dregs can be reduced, and the material conveying assembly can transport the bean dreg food more efficiently.

The utility model relates to the field of pipe fitting processing equipment, in particular to a steel chisel waxing device for aerated concrete production, which comprises a waxing pool, a support frame, a steel chisel and a cooling component, the cooling assembly comprises moving grooves correspondingly and coaxially formed in the steel chisels, cooling blocks arranged in the moving grooves in an up-down moving mode, moving mechanisms driving the cooling blocks to move up and down and a power mechanism installed on the supporting frame and driving the multiple sets of moving mechanisms to move synchronously. The supporting frame drives the multiple sets of steel chisels to leave the wax dipping pool, the cooling blocks capable of moving up and down are arranged in the steel chisels and driven by the moving mechanism and the power mechanism, and when the steel chisels move out of the wax dipping pool, the cooling blocks and the steel chisels generate relative movement, so that the cooling blocks are kept above the liquid level of the wax dipping pool all the time; and after the steel chisel is moved out of the liquid level, the cooling block cools the steel chisel, so that the wax liquid is rapidly solidified, and the wax dipping efficiency is improved.

The invention belongs to the technical field of nonferrous alloy metallurgy and casting, and particularly relates to an Al-V-C grain refiner and a preparation method and application thereof. Comprising the following steps that Al-10V powder and VC powder are mixed and then subjected to vacuum ball milling, and a mixture is obtained; after a container is preheated, pure aluminum is placed in the container and heated till the pure aluminum is melted to form aluminum melt, the aluminum foil wrapped with the mixture is immersed in the aluminum melt, and mixed melt is formed; raising the temperature of the mixed melt to 1190-1210 DEG C and keeping the temperature; then cooling to 790-810 DEG C, and keeping the temperature; and after the mixture is poured to be in a semi-solid state, continuous rheological extrusion forming is conducted, and the Al-V-C grain refiner is obtained. According to the grain refiner prepared through the method, VAl3 and VC phase distribution is more uniform, an Al matrix is introduced by adding the Al-V-C refiner, heterogeneous nucleation sites of Al are increased, the purpose of grain refinement is achieved, and the problem that the wettability of carbon and aluminum is poor is solved.

The utility model relates to drying equipment for sunflower seeds after coating, which comprises a working frame, the upper end of the working frame is of a trumpet-shaped opening structure, the left side of the lower end of the working frame is provided with a discharge port, and a mixing mechanism and a drying transmission mechanism are sequentially arranged in the working frame from top to bottom. The mixing mechanism designed by the utility model stirs sunflower seeds and medicament in the working frame in multiple degrees of freedom during operation, so that the sunflower seeds and the medicament are fully mixed, the medicament can comprehensively wrap the surfaces of the sunflower seeds, the quality of coatings on the surfaces of the sunflower seeds is improved, the drying transmission mechanism dries the sunflower seeds, and the drying efficiency of the sunflower seeds is improved. According to the sunflower seed drying device, the agent wrapping the surfaces of sunflower seeds is rapidly solidified on the surfaces of the sunflower seeds, the drying conveying mechanism controls the sunflower seeds to enter the drying channels working alternately during operation, the sunflower seed drying time is prolonged under the condition that the sunflower seed drying efficiency is not affected, and the sunflower seed drying quality is improved.

The invention belongs to the field of metal additive manufacturing, and relates to a preparation method of a formed test block containing prefabricated micropores, which comprises the following steps: 1) obtaining an initial base material sample containing a flat and smooth surface; (2) forming spherical holes in the flat and smooth surface of the initial base material sample in a machining manner; 3) filling the spherical holes with a sublimable material, and curing the sublimable material in the spherical holes; 4) sealing the spherical hole filled with the sublimable material to obtain a base material sample after hole sealing; and (5) continuously forming on the base material sample after hole sealing until a formed test block containing the prefabricated micropores is formed. The invention provides the preparation method of the formed test block containing the prefabricated micropores, which can be compatible with metal additive manufacturing process characteristics and can be used for accurately prefabricating the controllable pores.

The utility model discloses a kind of gob coalbed methane rapid plugging devices, it is related to gas layer plugging technical field, including directional drilling rig and mixing box, mixing box is used to store filling material, support frame carries out stirring to filling material in mixing box, improve the injection efficiency of filling material, improve the plugging speed to gas layer, and support frame quantitative injection retarder or accelerator in mixing box changes the coagulation speed of filling material, improve the plugging effect to gas layer, while the filling material in mixing box is stirred, the inside wall of mixing box is scraped, avoid that filling material sticks in the inside wall of mixing box, the utility model improves the speed and efficiency of plugging to gas layer.