330results about How to "Reduce corrosion" patented technology

The invention discloses a synthetic method of a water soluble ultraviolet light absorber BP-9. The method mainly comprises the following process steps: (1) carrying out methylation on the main raw materials of 2, 2', 4, 4'-tetrahydroxyl benzophenone, a transition metal salt catalyst and a mixed solvent which is prepared from dichloroethane and anhydrous ethanol in equal parts by weight to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone; (2) carrying out sulfonation reaction on the main raw materials of methylate, sulfamic acid and C1-C3 halohydrocarbon to obtain 2, 2'-dihydroxyl-4, 4'-dimethoxyl benzophenone-5, 5'-disulfonic acid; and (3) carrying out neutral reaction on the main raw materials of sulfonated product, inorganic base and ethanol water to finally obtain the BP-9 product. The synthetic method disclosed by the invention is few in reaction step, low in cost, high in product purity and stable in quality, and raw materials are easily available.

The invention discloses a triazine desulfurizer and a preparation method thereof, and belongs to the technical field of gas purification. The triazine desulfurizer is mainly prepared from the following raw materials in percentage by weight: 20 to 50 weight percent of triazine derivative, 10 to 15 weight percent of sterically hindered amine, 3 to 7 weight percent of stabilizer, 1 to 3 weight percent of synergist, 0.5 to 1.5 weight percent of penetrant, 0.5 to 1.5 weight percent of inhibitor, 1 to 2 weight percent of additive and the balance of water, the preparation method of the triazine derivative comprises the following steps: adding 2-(diphenylphosphino) ethylamine into a toluene solvent, adding a paraformaldehyde aqueous solution in batches under a stirring condition, and reacting for 2-8 hours to obtain the triazine derivative. According to the triazine desulfurizer and the preparation method thereof provided by the invention, the triazine derivative and the sterically hindered amine are taken as a host, and the stabilizer, the synergist, the penetrant, the inhibitor and the assistant are compounded, so that the scaling trend of the triazine desulfurizer in an oil and gas well can be slowed down, the dissolution rate of hydrogen sulfide and the mass transfer rate in a solution are increased, and the desulfurization reaction is promoted; the desulfurization effect and the desulfurization rate are improved, and meanwhile, a very good scale inhibition effect is also achieved.

This utility model discloses a container, comprising a frame, a top panel, side panels, end panels, and door panels. At least one of the top panel, side panels, end panels, and door panels includes at least two layers: a steel plate and a composite material plate. The steel plate is fixedly connected to the frame. The composite material plate is located on at least one side of the steel plate facing inwards and outwards, and is fixedly connected to the steel plate. The composite material plate has the same shape as the steel plate to be integrally fitted with it, or the composite material plate is flat and partially fitted with the steel plate. According to this utility model, at least one of the top panel, side panels, end panels, and door panels is configured as a two- or multi-layer structure, wherein the side of the steel plate facing inwards and / or the side facing outwards is a composite material plate. This design allows the container to meet long-term requirements for wear resistance, acid and alkali resistance, salt spray resistance, and mildew resistance. Furthermore, container wall maintenance is relatively simple and inexpensive.

The utility model provides a high -power dynamic charging pile structure relates to charging pile technical field, and the air outlet plate spare is connected on the casing, and the water drain support fixedly connected in the side of air outlet plate spare near casing inside, sets up the air inlet louver plate spare above the water drain support, the air inlet hole is set up in the upper position of air outlet plate spare, the lower position of air outlet plate spare sets up the external water drain hole, the height position of air inlet hole corresponds air inlet louver plate spare, the height position of external water drain hole corresponds water drain support. The utility model discloses the setting of air inlet louver plate spare and water drain support, and the flow track of air in air inlet louver plate spare area will repeatedly collide to the surface of folding frame and baffle, even if there is rainwater from the air outlet plate spare and enters, and the surface of folding frame and baffle is collided after immediately falls down under the action of gravity, and the rainwater droplet is gathered in the water drain support, and is discharged from the external water drain hole and the casing in time, improves the protection effect to each electrical element.

The utility model relates to a semi-open type inversion brick structure for an electric drive system, a controller system and a vehicle. The structure comprises a control mainboard, an IGBT module, a heat radiation substrate, a film capacitor, an EMC filtering assembly and a semi-open type housing. One side of the heat dissipation substrate is provided with a heat dissipation water tank, the heat dissipation water tank is connected with a water inlet and a water outlet, the IGBT module is installed in the heat dissipation water tank, the control mainboard is located at the upper end of the IGBT module, the thin film capacitor and the EMC filtering assembly are installed on the side, away from the heat dissipation water tank, of the heat dissipation substrate, and the heat dissipation substrate is installed in the semi-open type shell; a cooling pipeline is arranged in the semi-open type shell, one end of the cooling pipeline is connected with a water inlet pipe, the other end of the cooling pipeline is connected with a water inlet, and the side, away from the heat dissipation water tank, of the heat dissipation substrate is close to the cooling pipeline. Compared with the prior art, the power module has the advantages of being convenient to assemble, good in heat dissipation and cooling effect, high in filtering performance and safety and the like.

The invention relates to a synthesis method of a 3-olefine acid ester compound. The method comprises the following steps: carrying out contact reaction on an organic phosphine ligand, a palladium compound, conjugated olefin, an alcohol compound and carbon monoxide; wherein the structural formula of the organic phosphine ligand is shown in the specification, and in the structural formula, R0 and R1 are respectively selected from hydrogen, alkyl, alkoxy, halogen or halogenated alkyl; and R2 and R3 are respectively selected from hydrogen or alkyl. The method provided by the invention has the advantages of mild conditions, no need of an acid auxiliary agent, high yield and selectivity of the generated 3-olefine acid ester compound, reduction of corrosion to a reactor, and good application prospect, and the speculation is that the electrical property of phosphorus atoms can be regulated and controlled by using the organic phosphine ligand provided by the invention, so that the reaction activity of the palladium-organic phosphine ligand catalyst is regulated and controlled, and the yield and selectivity of the 3-olefine acid ester compound are improved. Therefore, the palladium-organic phosphine ligand catalyst generated by the ligand and a palladium compound in situ can efficiently catalyze the reaction of conjugated olefin, carbon monoxide and alcohol compounds.

The application provides a porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction and a preparation method. The preparation method comprises the following steps: adding 4,4-diamino diphenyl ether and pyromellitic dianhydride into a solvent, uniformly mixing, and preparing a polyamide acid precursor spinning solution; electrospinning the prepared polyamide acid precursor spinning solution to prepare polyamide acid nanofibers; immersing the prepared polyamide acid nanofibers in a mixed metal salt solution containing cobalt salt, lanthanum salt and zinc salt to prepare polyamide acid nanofiber precursors loaded with metal ions; and performing programmed temperature heat treatment on the prepared polyamide acid nanofiber precursors loaded with metal ions in a protective atmosphere to prepare the porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction. The prepared porous carbon nanofiber electrocatalyst loaded with cobalt / lanthanum hydroxide heterojunction has excellent electrochemical oxygen reduction reaction and oxygen evolution reaction bifunctional catalytic activity.

The present application relates to the technical field of chemical experiment, and specifically relates to a chemical experiment table with chemical solution treatment function, which comprises a chemical experiment table composed of a table body, a water tank and a storage rack, a controller is arranged on the table body, the controller is signal connected with a touch display screen, neutralization cavities are symmetrically arranged in the middle of the table body, a PH sensor is arranged in each neutralization cavity, a fixing block is fixedly connected to the side wall of each neutralization cavity, vibration grooves are formed in the two sides of the inner wall of the table body, a neutralization pipe is slidably arranged in the middle of each neutralization cavity, a plurality of through holes are formed in the neutralization pipe, a waste liquid pipe is connected to the top of each neutralization cavity, a three-way pipe is connected to the bottom of each neutralization cavity, a collecting assembly and a sewage assembly are arranged at the other two ends of the three-way pipe respectively, and an auxiliary assembly is arranged in the vibration groove. The structure for preliminary neutralization treatment of chemical solution arranged below the chemical experiment table can avoid the leakage risk and high subsequent treatment cost caused by the temporary storage of the traditional experiment table relying on the collecting barrel.

The utility model discloses a kind of device for separating and purifying cosmetic functional raw materials using affinity chromatography technology, it is related to chromatography column field, including fixed plate, chromatography column, heat preservation shell and connecting assembly, chromatography column is by effluent bucket, glass shell and top cover composition, fixed plate fixedly sets in effluent bucket outer wall, effluent bucket and top cover are with glass shell and are formed sealed cavity by thread connection, heat preservation shell is clamped by two half shells and is wrapped in chromatography column outer wall, connecting assembly is installed in fixed plate lower surface, connecting assembly is used for the fixation and separation of two half shells, the utility model is split by heat preservation shell, so that scale can be completely removed in cleaning process, improve heat transfer efficiency, ensure the uniformity of chromatography column internal temperature distribution, conducive to maintaining the stability and separation effect of chromatographic process.

The present application belongs to the technical field of white carbon black preparation, and particularly relates to an industrialized preparation method for preparing high-purity low-fluorine white carbon black by taking fluorine-containing silicon slag as raw material, and through mechanical activation, composite alkali leaching, fractional impurity removal, low-temperature crystallization and surface modification. The present application can realize harmless disposal of the fluorine-containing silicon slag and high-value regeneration and utilization of fluorine and silicon resources, has good environmental protection value and economic benefits, and has wide industrialized application prospect.

The invention discloses a process for preparing a V2O3 / ZnV2O3 total battery by simultaneously using vanadium oxide in a zinc ion battery as a positive electrode material and a negative electrode material, which comprises the following steps: reacting ammonium metavanadate with absolute ethyl alcohol by adopting a solvothermal synthesis method, washing, drying, and calcining in a tubular furnace to obtain V2O3; in the preparation process of the V2O3 positive electrode material, only V2O3, acetylene black serving as a conductive agent and PVDF serving as a binder are mixed in proportion and then are coated on graphite paper, other coating protection materials do not need to be introduced into a V2O3 / Zn negative electrode, and V2O3 is used as a protection layer to inhibit growth of zinc dendrites, relieve hydrogen evolution side reaction of the zinc negative electrode and reduce corrosion of zinc. Vanadium oxide V2O3 is directly used as a core positive electrode material, the zinc negative electrode coating is developed by utilizing the characteristics of the vanadium oxide V2O3, a material is formed, meanwhile, the performance optimization of the positive electrode and the negative electrode is realized, the used raw materials are simple and easy to obtain, the process is simple and easy to implement, and the preparation process is simple and easy to implement from V2O3 raw material synthesis to positive and negative electrode piece preparation to V2O3 / ZnV2O3 total battery assembly. And comprehensive improvement of positive and negative electrode performances of zinc ions is simultaneously realized by a single material.

The utility model relates to the technical field of household appliances, in particular to a refrigerator. The door body is movably connected to the refrigerator body and is constructed to open and close the refrigeration chamber; the evaporation dish assembly is arranged at the bottom of the box body, the evaporation dish assembly comprises an evaporation dish used for collecting defrosting water, the evaporation dish is provided with an inserting groove located in the outer side of the bottom of the evaporation dish, and the inserting groove extends in the length direction of the evaporation dish or the width direction of the evaporation dish; and at least part of the evaporating pipe is inserted into the inserting groove in the extending direction of the inserting groove, so that at least part of the evaporating pipe is attached to the bottom of the evaporating dish. The service life of the evaporation pipe is prolonged, the bottleneck problem that the size of the evaporation pipe is not accurate is solved, and the installation stability of the evaporation pipe can be improved.

The application discloses a kind of nano-permeable resin coating for construction in high-humidity water environment of desulfurization chimney lining anticorrosion, chimney lining includes reducing agent layer, reinforcing agent layer, primer layer, topcoat layer in turn from inside to outside, nano-permeable resin primer and topcoat can be permeated into the concrete matrix to form the anticorrosion layer of "matrix-coating", "mixing element integration", so that it not only has excellent acid corrosion resistance, but also has high and low temperature alternation and airflow scouring performance, solve the problem that chimney lining anticorrosion layer fails due to stress corrosion, also has good construction performance, solve the difficult problem that chimney lining anticorrosion layer construction period is short.

The application discloses a preparation method of a metal catalyst material and application of the metal catalyst material in controllable degradation of polysaccharides, and the preparation comprises the following steps: mixing and reacting a ligand material with a metal ion solution, solid-liquid separation, washing, and drying; grinding the dried solid into powder, and then high-temperature calcining to obtain a metal monatomic catalyst, namely the metal catalyst material; or uniformly mixing and grinding the obtained metal monatomic catalyst with a metal organic framework material, and then high-temperature calcining to obtain a composite metal catalyst material. The metal catalyst material prepared by the application can make up for the limitations of Fenton oxidation principle in degrading polysaccharides, such as large iron consumption, strong pollution, and difficult control, and can avoid the adverse effects caused by the corrosiveness of hydrogen peroxide in actual production and operation. Different molecular weight polysaccharides can be obtained by adjusting the proportion and dosage of the metal catalyst material, the method can prepare polysaccharides with different molecular weights, and the prepared polysaccharides have good uniformity.

The present application relates to the technical field of metallurgical material processing, and particularly relates to a pickling process for avoiding corrosion defects of pickled plates. The pickling process flow is: unwinding, welding, tension leveling, turbulent hydrochloric acid pickling, rinsing, drying, flattening, edge cutting, oiling and coiling. The present application effectively removes the surface iron oxide scale by reasonably matching the tension leveling elongation, acid temperature, concentration and process speed, and avoids the generation of under-pickling and over-pickling conditions. The Cl ‑ <20mg / L in the rinsing water and the atmospheric environment humidity is controlled to be ≤60%RH, the residual acid on the surface of the steel plate and atmospheric corrosion are reduced, the rust-proof oil has good replaceability, moisture and heat resistance, salt spray resistance, high temperature resistance and atmospheric resistance, can make perfect adsorption between the steel matrix and the oil film, and avoid the generation of various corrosion defects such as point, strip and block, and the like from the root, and the surface is smooth and clean without any corrosion and color difference defects.

A kind of copper clad steel grounding wire is used to straightening device, it is related to copper clad steel grounding wire straightening technical field, including mounting plate and the support frame for supporting mounting plate, a group of straightening rollers for extruding grounding wire is rotationally arranged on mounting plate, and once straightening area is formed between two straightening rollers, which can be passed through by grounding wire, first sliding plate capable of sliding along the direction perpendicular to the movement direction of grounding wire is arranged on mounting plate, and another straightening roller is rotationally connected with first sliding plate;Multiple auxiliary rollers are arranged on the side of straightening roller away from the entry of grounding wire, and multiple auxiliary rollers are respectively located at the two sides of grounding wire, so that secondary straightening area is formed between the two sides of auxiliary roller of grounding wire, which can be passed through by grounding wire, multiple second sliding plates capable of sliding along the direction perpendicular to the movement direction of grounding wire are arranged on mounting plate, and second sliding plate is located at the same side with first sliding plate, corresponding second sliding plate is rotationally connected with the side auxiliary roller, and the interval between straightening rollers can be adjusted to adapt to grounding wire of different diameters.

The invention discloses a dechlorination method of a wet-process phosphoric acid process, and belongs to the technical field of dechlorination of wet-process phosphoric acid. The method comprises the following steps: adding ground phosphorite into a reaction tank A, carrying out decomposition reaction on the phosphorite and high-temperature slurry to obtain slurry a, pumping the slurry a into a reaction tank B, adding concentrated sulfuric acid and a sodium persulfate solution, activating sodium persulfate in the inherent high temperature, strong acid and Fe2 environment, carrying out oxidation dechlorination reaction, and carrying out solid-liquid separation to obtain low-chlorine phosphoric acid and phosphogypsum; finally, the reaction tank B is connected with a tail gas washing system, water is used for circulating washing, then alkali liquor is used for countercurrent washing, and the pollution discharge standard is met. The oxidation dechlorination process is integrated in the wet-process phosphoric acid production process for the first time, chloride ions are efficiently oxidized into chlorine to be removed by utilizing the strong oxidizing property of sodium persulfate, the dechlorination rate can reach 95% or above, the chlorine content in phosphoric acid is remarkably reduced, equipment corrosion is relieved, the product quality is improved, and the method is simple in process, low in energy consumption, low in cost, green, environmentally friendly and suitable for industrial production. The method is suitable for industrial application.

The invention belongs to the field of mineral processing and secondary resource recycling, and particularly relates to a method and a system for recovering tungsten from scheelite heating concentrate tailings, the method comprises the following steps: blowing carbon dioxide-containing gas into slurry containing the scheelite heating concentrate tailings, and carrying out gas-solid-liquid three-phase activation treatment to obtain activated ore pulp; and then the activated ore pulp is directly subjected to roughing without an additional collecting agent, and scheelite roughing concentrate is obtained. According to the method, carbon dioxide is creatively adopted for carrying out gas-solid-liquid three-phase modification activation on the tailings, in this way, the surface property of the tailings can be optimized, scheelite surface calcium sites are selectively activated, and the recovery rate and the collecting selectivity of tungsten in the tailings can be effectively improved through further cooperation with subsequent direct flotation treatment without additional agents.

The invention discloses a method for recovering valuable elements in liquid obtained after bauxite wet desulphurization, and relates to the technical field of bauxite resource utilization. Comprising the following steps: carrying out ceramic membrane filtration pretreatment on the bauxite wet desulfurization liquid to remove impurities; the silicon element is recycled in a targeted manner through a compound flocculation-calcination process to obtain the white carbon black; the iron element is recycled through ozone oxidation-ammonium bicarbonate precipitation, and high-purity iron oxide is prepared; separating and purifying an aluminum element through a seed crystal induction-calcination process to obtain metallurgical-grade aluminum oxide; a fluorine-containing precipitant is used for selectively precipitating and recovering magnesium element to obtain a high-quality magnesium salt product; and neutralizing the tail liquid, and discharging after reaching the standard. According to the method, accurate separation and high-valued utilization of four elements of aluminum, iron, silicon and magnesium are realized through a synergistic process of targeted recovery of silicon, gradient separation of iron and aluminum and selective precipitation of magnesium, and the problems of silicon resource waste, low element separation efficiency, insufficient product purity, secondary pollution and the like in a traditional process are thoroughly solved; all-component resource comprehensive utilization of desulfurized liquid resources is achieved.

This invention discloses a low-corrosion chloride molten salt heat transfer and storage medium, method, and application, belonging to the field of molten salt thermal storage technology. The high-heat-capacity, low-corrosion carbonate molten salt heat transfer and storage medium of this invention is composed of 18%~22% potassium chloride, 6%~10% sodium chloride, 1%~3% aluminum powder, 1%~3% magnesium powder, 1%~3% zinc powder, with the remainder being zinc chloride. Its key feature is the introduction of metal powder into the molten salt, which not only achieves excellent thermal storage performance at 600℃~800℃, but also reduces corrosion by utilizing the potential regulation ability of dissolved metal ions and the formation of highly active [Al] from gaseous chloride products through physical and chemical adsorption. This low-corrosion chloride molten salt heat transfer and storage medium achieves excellent thermal storage performance and low corrosivity, and can be applied in solar thermal power generation and molten salt energy storage.

The utility model belongs to the technical field of recovery heat exchanger, concretely relates to a flue gas waste heat recovery heat exchanger with leak detection structure, a flue gas waste heat recovery heat exchanger with leak detection structure, including recovery heat exchanger body, recovery heat exchanger body inside is provided with heat pipe, the heat pipe includes the water inlet and water outlet of extending recovery heat exchanger body inside organism, recovery heat exchanger body still includes the flue inlet pipe and the flue outlet pipe, the flue inlet pipe entrance is equipped with the filter component for intercepting the smoke dust, the recovery heat exchanger body outer wall is equipped with detachable monitoring assembly, the monitoring assembly includes the barometric pressure sensor for real -time monitoring recovery heat exchanger body inside barometric pressure change, through the barometric pressure sensor real -time monitoring inside barometric pressure change in monitoring assembly, the detachable structure design of combination screw pipe, monitoring assembly can be quickly disassembled replacement.

The utility model discloses a handrail suitable for a ground sauna swimming pool bathtub, which relates to the technical field of bathtub handrails and comprises an upper handrail, a lower handrail and an adjusting handrail. A rotary connecting groove and a positioning groove are formed in the upper handrail, a lower handrail is arranged at the bottom of the upper handrail, and an inner adjusting groove is formed in the lower handrail. According to the handrail suitable for the ground sauna swimming pool bathtub, the whole handrail is split into a three-section type structure of the upper handrail rod, the lower handrail rod and the adjusting handrail rod which can be adjusted, the length of the handrail can be adjusted according to requirements during installation, the using effect is better, a protective cover and a sealing ring which can be used for isolating and protecting locking bolts are arranged, and therefore the using effect is better. The handrail suitable for the bathtub of the ground sauna swimming pool can effectively reduce corrosion of water vapor to locking bolts, so that the handrail suitable for the bathtub of the ground sauna swimming pool solves the problem that an existing handrail of the bathtub of the ground sauna swimming pool is integrally designed and cannot be extended or contracted according to the requirements of a user during installation.

The utility model discloses a piston type ship ballast water self -balancing device, including ship body, one side of the inside of ship body is equipped with ballast A, and its other side is equipped with ballast B, is equipped with the communicating pipe between ballast A and ballast B, and the inside of ballast A is provided with multiple groups of negative pressure passage, the inside of negative pressure passage is inserted with piston, and the piston end is fixed with the connecting column, the transmission plate is fixed to the connecting column end. The piston type ship ballast water self -balancing device, the output end of cylinder drives the fixed drive seat and does linear motion, the movement of piston changes the air pressure in ballast A, and then realizes the quick transfer of fluid in ballast A and ballast B by the connection effect of communicating pipe, adjusts the weight distribution of both sides of ship body to offset the inclination force, can respond to the inclination of ship body in real time, effectively avoids the risk of rollover, and the compact structure design, movement steady, guarantee the safety and the comfort of pleasure boat navigation.

The denitration and dust removal integrated biomass grate boiler comprises a second flue, a third flue and a fourth flue which are sequentially connected with an outlet of a hearth, the lower end of the second flue is communicated with the lower end of the third flue, and the upper end of the third flue is connected with the upper end of the fourth flue through a furnace top turning flue. A first platen superheater is arranged at the upper part of the hearth, a second platen superheater is arranged in the second flue, a coiled pipe superheater is arranged in the third flue, and denitration equipment, an economizer and a tail heating surface are sequentially arranged in the fourth flue according to the flowing direction of flue gas; dust removal equipment is arranged in the furnace top turning flue, and the dust removal equipment and denitration equipment are supported on a boiler body steel frame. The dust removal equipment and the denitration equipment are also arranged in the range of the boiler body, so that compared with the prior art, the lengths of the inlet flue and the outlet flue are greatly shortened, the heat dissipation loss is reduced, the boiler efficiency is improved, and the dust removal and denitration effects can be improved; and the floor area is small, and the construction cost is low.

This invention relates to the field of water filtration equipment, and particularly to a rare-earth magnetic alloy scale inhibitor and descaling water treatment device with a multi-layer filtration structure. It includes a housing, and within the filtration chamber, a magnetic purification filtration module comprising a magnetized cylinder installed within the filtration chamber and having a filtration channel. The filtration channel is vertically arranged, and the magnetized cylinder has an outlet and a first inlet communicating with the filtration channel. A magnetic purification component is also provided within the filtration channel, spanning across the filtration channel so that water flowing towards the outlet must pass through the magnetic purification component. The multi-layer filtration module includes a filtration component installed between the inlet and the magnetized cylinder, the filtration component being arranged in a covering shape on the outer periphery of the magnetized cylinder, so that water flowing in from the inlet passes through the filtration component before reaching the filtration channel. Through the combination of a multi-layer filtration structure and a magnetic purification filtration structure, multi-layer filtration is achieved, effectively improving the filtration effect.

The utility model relates to the technical field of drain valves, in particular to a corrosion-resistant drain valve, which improves the sealing performance of a shell, reduces the corrosion of equipment parts, improves the use reliability and improves the cleaning and maintenance convenience in the shell. Comprising a shell and an inlet, and the inlet is formed in the outer side wall of the shell in a communicating mode; the discharging barrel is arranged on the lower portion of the outer side wall of the shell in a communicating mode, the bottom end of the first conveying pipe is communicated with the discharging barrel, the input end of the second conveying pipe is arranged on the upper portion of the shell in a communicating mode, and the output end of the second conveying pipe is communicated with the first conveying pipe; the first discharging device is arranged on the upper portion of the shell and used for controlling discharging of air and condensate water, and the second discharging device is arranged on the lower portion of the shell and used for controlling discharging of the condensate water.

This invention discloses a machining process for precision screws, belonging to the field of mechanical manufacturing technology. It includes the following steps: S1, rough machining and forming: treating the surface of the bar stock and machining functional slot structures, followed by pre-deburring; S2, structural strengthening: heat-treating the workpiece for strengthening; S3, precision finishing: correcting the form and position tolerances of the heat-treated workpiece and precision grinding each surface; S4, quality assurance delivery: completing inspection, cleaning, and packaging. This process flow is clear, employing a logical arrangement of "forming first, then strengthening, and then fine-tuning," resulting in a workpiece with not only a high-hardness surface but also improved coaxiality of its stepped axis and thread trajectory accuracy. This significantly enhances the screw's operational stability at high speeds. Furthermore, through staged quality control and precision correction, it improves the first-pass yield of the workpiece and reduces the risk of scrap due to heat treatment deformation, possessing extremely high industrial application value.

The utility model belongs to the technical field of liquid cooling plates, and particularly relates to an arch bridge type reinforced wide-flow-channel fin liquid cooling plate, which comprises a liquid cooling plate, a lower substrate is welded at the top of the liquid cooling plate, an upper substrate is welded at the bottom of the liquid cooling plate, and a flow channel cavity is reserved in a whole formed by the liquid cooling plate, the lower substrate and the upper substrate. The transverse beams and the vertical beams which are arranged in a staggered mode are arranged to support the lower base plate and the upper base plate, so that the interior of the runner cavity is reinforced, the overall structural strength is improved, the battery bulging phenomenon is reduced, the arc-shaped grooves are formed, cooling liquid can normally circulate when flowing through the transverse beams through the arc-shaped grooves, and the cooling effect is improved. According to the liquid cooling device, the cooling liquid can be guided to flow, the cooling liquid can be buffered and kept stable by forming the first transition round corner, air bubbles are prevented from being generated when the cooling liquid flows out by forming the second transition round corner, noise generated during liquid cooling is further reduced, and material corrosion is reduced.

This invention relates to the field of casting technology, specifically to a mold assembly and core removal method for a blind cavity deep-hole structure casting. The mold assembly for a blind cavity deep-hole structure casting includes a shell unit and a core unit. The shell unit includes a shell body; the shell body has a cavity that conforms to the outer surface contour of the casting; the core unit is located in the cavity; the shape of the core unit matches the inner cavity of the casting; the core unit includes an inner core and an outer core; the outer core covers the surface of the inner core; the collapse strength of the inner core is lower than that of the outer core; the core unit is connected to the shell unit. Through the multi-layer nested structure of the core unit, this helps to solve the problem of high difficulty in core removal for blind cavity deep-hole structure castings.

The utility model discloses a high-temperature-resistant lining oil pumping pipe, which relates to the technical field of oil exploitation and comprises an oil pumping pipe body, a lining pipe is arranged inside the oil pumping pipe body, the outer side of the oil pumping pipe body is in threaded connection with a coupling main body, and a sealing ring is fixedly connected inside the coupling main body. One end of the sealing ring abuts against one end of the oil pumping pipe body and one end of the lining pipe, the oil pumping pipe body is made of alloy steel materials, and a heat insulation layer is arranged on the outer side of the oil pumping pipe body. According to the oil pumping pipe with the high-temperature-resistant lining, the oil pumping pipe body made of alloy steel materials containing high chromium and nickel elements is combined with the heat insulation layer wrapped by the outer-layer heat-resistant fiber materials and the polytetrafluoroethylene lining pipe to form a composite material structure. Not only are many defects of a traditional pipeline in the high-temperature and high-pressure environment effectively overcome, but also the efficiency and the safety of the whole system are improved, and the strict requirements of modern oil exploitation for equipment are met.