41results about How to "Avoid corrosion risk" patented technology

The invention provides a urea crystallization amount estimation, crystalline state judging and crystal eliminating method. Based on the engine running working conditions, influences of the urea crystallization speed and the SCR conversion efficiency on urea crystallization are estimated under the current working condition. When the urea crystallization amount is too much, the engine running state is adjusted, crystals are removed in time, and the stone forming phenomenon is prevented.

A heat transfer tube (101) for a heat exchanger. The wall (120) of the heat transfer tube comprising at least one axially extending wing-shaped protrusion (104, 105) to provide the tube with additional heat transfer surface area. The wing shaped protrusion is formed by a process comprising at least one of: (i) folding the wall of the tube; and (ii) extrusion.

A composite structural reinforcement is realized within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin matrix. The band is arranged according to a helicoidal path along the internal side of the pipe.

The invention discloses a semi-dry method pulse plasma flue gas purification system. The system comprises a reactor shell for flue gas to circulate and a high-voltage pulse power source form a plasma electric field in the reactor shell and further comprises an atomized water supply system for increasing the water content for the flue gas, a humidity sensor used for humidity of the flue gas in the reactor shell, and a control system used for controlling the water spraying amount of the atomized water supply system according to the detection result of the humidity sensor to keep the relative humidity of the flue gas between 85% and 95%, and the atomized water supply system is arranged on a flue gas inlet of the reactor shell. According to the flue gas purification system, the water spraying amount of the atomized water supply system is controlled through the control system, and the relative humidity of the flue gas is controlled between 85% and 95%; compared with a traditional dry type reaction, the removal efficiency of various pollutants is improved, meanwhile, the corrosion risk of the wet method reaction technology on a subsequent flue and other facilities is also avoided, the economy performance is better, and the semi-dry method pulse plasma flue gas purification system is suitable for a large-scale flue gas processing project.

The invention discloses an aluminium alloy section and a manufacture method thereof. The aluminium alloy section comprises the following elementary components of 87.5 percent of Al, 0.4 percent of Si, 1.1 percent of Fe, 0.75 percent of Mn, 0.8 percent of Mg, 2.1 percent of Zn, 4.4 percent of Cu, 0.1 percent of Ni and 0.1 percent of Ti. The manufacture method of the aluminium alloy section comprises the following process steps of: (1) melting an aluminium material, and adding metal components including the Si, the Fe, the Cu, the Mn, the Mg, the Zn, the Ni and the Ti; (2) controlling high temperature for casting to form an aluminium-based solid solution; (3) carrying out purification treatment and modification to enable grains to be refined and reduced to 1 / 20 before treatment and enable the total content to be reduced by 30 percent to obtain antirust hard aluminium alloy; and (4) splicing and molding by adopting a mould to obtain the aluminium alloy section. The aluminium alloy section provided by the invention has favorable corrosion resistance and excellent mechanical strength and is superior to a general section for a common laboratory.

The invention discloses a lithium ion battery tab which comprises a switching positive tab and a switching negative tab which are arranged on a lithium ion battery. Tab glue is arranged on the switching positive tab and the switching negative tab, and a positioning device is arranged on the tab glue and used for positioning aluminum-plastic films in folding. The tab glue of the switching tabs is provided with two positioning projections or lugs which are positioned on two side surfaces of the switching tabs, the shell-entering position of a bare cell can be accurately positioned by the aid ofthe positioning projections or lugs on one surface of each switching tab, and alignment of the aluminum-plastic films after turnover can be accurately controlled by the aid of the positioning projections or lugs on the other surface of each switching tab. On one hand, poor exposure of packaged tab glue due to the inaccurate shell-entering position of the bare cell in packaging can be prevented, exposure consistency of the tab is improved, and assembly positioning accuracy of a battery pack assembled by the cell is improved. On the other hand, top edge sealing dislocation can be decreased and even eliminated, and cell length consistency is improved. The lithium ion battery tab is applied to the technical field of batteries.

A composite structural reinforcement is realized within the pipe through in situ stratification of at least one band of reinforcement fibers and a resin matrix. The band is arranged according to a helicoidal path along the internal side of the pipe.

The invention belongs to the field of seawater desalination, and specifically discloses a wave-energy-based seawater desalination system. The system comprises a wave energy conversion device and a seawater desalination device, wherein the wave energy conversion device comprises a first buoy, a second buoy, a third buoy and a fourth buoy which are connected in sequence by transmission bearings, andfurther comprises four sets of supercharging units with the same structure; each set of the supercharging units comprises a piston, a piston cylinder and a hydraulic oil cylinder which are connectedin sequence; the bottom of each hydraulic oil cylinder is an elastic diaphragm; the seawater desalination device comprises four sets of seawater desalination units with the same structure; each set ofthe seawater desalination units is connected with the corresponding supercharging units; pressure applied by the supercharging units enables seawater to be filtered through a reverse osmosis membraneso as to obtain fresh water. According to the seawater desalination system disclosed by the invention, the structure and layout of the wave energy conversion device are optimized, so that the situation that the stretching and compression of the pistons occur in pairs during the change of the angular displacement of one buoy can be ensured, thereby greatly improving the ability to absorb and transform wave energy.

The invention provides a urea crystallization amount estimation, crystalline state judging and crystal eliminating method. Based on the engine running working conditions, influences of the urea crystallization speed and the SCR conversion efficiency on urea crystallization are estimated under the current working condition. When the urea crystallization amount is too much, the engine running state is adjusted, crystals are removed in time, and the stone forming phenomenon is prevented.

The invention concerns a bitumen emulsion-based surfacing composition or bituminous mix consisting of an amphoteric surfactant and its use in road highway engineering for making materials for new roads, for reinforcing or maintaining old roads or for punctually repairing same.

A compressor housing resistant to a titanium fire (burning titanium). A mixed housing is constructed, in which a structure holding stator blades includes a single-cast part made from titanium or titanium alloy, and at least one element forming a shield made from refractory alloy(s), and which is incombustible in presence of burning titanium, where each shield is secured to the single-cast part by fasteners. The fasteners are positioned with each shield so as to define jointly an inner wall demarcating an outer contour of the compressor airstream.

The invention discloses an anticorrosion surfacing interior joint coating method for a submarine pipeline. According to the technical scheme, the method comprises the steps that anticorrosion alloy with a certain width and thickness is surfaced on the inner walls of the two ends of a submarine pipeline steel pipe through an automatic tungsten inert-gas arc surfacing machine, and then anticorrosion and heat preservation treatment are conducted on the inner wall and the outer wall of the steel pipe (the step is shown as the Figure 1); during the submarine pipeline welding construction process, priming and transiting are conducted through argon welding wire filling-free inert gas shielded-arc welding, and by means of a metallurgy composite welding technique of diffusing, filling and covering of flux-cored self-shielded welding wires or manual arc welding electrodes, a continuous anticorrosion layer is formed on the inner wall of the pipeline (the step is shown as the Figure 2).

The invention relates to an anticorrosion hard aluminum alloy sectional material and a preparation process thereof. The anticorrosion hard aluminum alloy section material consists of the following elements by weight percent: 88.5 percent of Al, 0.7 percent of Si, 1.4 percent of Fe, 0.95 percent of Mn, 0.9 percent of Mg, 2.4 percent of Zn, 4.6 percent of Cu, 0.35 percent of Ni and 0.2 percent of Ti. The preparation process comprises the following steps: step S1: melting an aluminum material, and charging Si, Fe, Mn, Mg, Zn, Cu, Ni and Ti according to the ratio; step S2: controlling high-temperature casting, and forming aluminum-base solid solution; step S3: carrying out anode oxidation, purification and turning treatment, and refining crystal grains; step S4: splicing molding by adopting a mold. The anticorrosion hard aluminum alloy sectional material has good anticorrosion characteristics and excellent mechanical strength and is better than an ordinary universal sectional material for laboratory.

The invention discloses a black water coupling processing apparatus. The apparatus mainly comprises a solid-liquid separation unit used for removing solid particles from black water to form gray water and a gray water evaporation unit used for removing mineral matters from the gray water. The invention further discloses a black water coupling processing method, which comprises steps: 1) separating solid particles from black water through solid-liquid separation technology to form gray water; and 2) separating mineral matters from gray water through evaporation technology to obtain purified gray water. Solid-liquid separation technology and evaporation technology are well combined to be applied to process black water from a coal gasification apparatus. Compared with a common black water processing process, the method allows safety and stability of operation of a black water processing apparatus to be improved, the technical process to be simplified, area occupation and difficulties of arrangement, operation and maintenance of the apparatus to be reduced, and the cost for treating black water to be reduced.

The invention discloses UV moisture dual-curing silica gel, which comprises the following components in parts by weight: 60-100 parts of vinyl alkoxy terminated polydimethylsiloxane, 40-60 parts of sulfydryl terminated polydimethylsiloxane, 5-20 parts of a cross-linking agent, 5-30 parts of filler, 1-10 parts of a catalyst and 1-10 parts of a photoinitiator. The vinyl alkoxy-terminated polydimethylsiloxane is used as main resin and contains a vinyl group and an alkoxy group at the same time, and the vinyl group is used as a UV curing group and is subjected to a click chemical reaction with sulfydryl-terminated polydimethylsilane under the promotion of a photoinitiator, so that a cross-linked cured film is formed; wherein the alkoxy group is used as a moisture curing group and is subjected to cross-linking polymerization with a cross-linking agent under the action of a catalyst. Compared with the prior art, firstly, UV curing is carried out to achieve rapid primary curing, the problem that the initial curing speed is low is solved, secondly, the existence of acrylic acid substances in a traditional UV moisture curing adhesive is avoided, the problem that the acrylic acid substances corrode materials such as devices and circuit boards is solved, and the product can be widely applied to bonding and sealing of electronic devices.

The invention discloses a ship sanitary system by utilizing air-conditioning condensed water. The system comprises an air conditioner and an air-conditioning condensed water cabin; the air-conditioning condensed cabin is connected with an air-conditioning water pump set unit; the air-conditioning water pump set unit is connected with a disinfection unit, the disinfection unit is connected with anair-conditioning condensed water pressure tank; the air-conditioning condensed water pressure tank is connected with a sanitary appliance; the sanitary appliance is connected with a sanitary water pressure tank; a condensed water supply electric remote-controlled valve is arranged between the air-conditioning condensed water pressure tank and the sanitary appliance; a sanitary water supply electric remote-controlled valve is arranged between the sanitary water pressure tank and the sanitary appliance; the ship sanitation water system by utilizing the air-conditioning condensed water also comprises a ship automatic control system; a liquid level sensor is arranged on the air-conditioning condensed water tank, and the liquid level sensor is connected with the automatic control system of theship. According to the ship sanitary water system by utilizing air-conditioning condensed water, the sanitary water system can be used for flushing the sanitary ware by using the air-conditioning condensed water, so that the corrosion risk of the seawater pipeline is avoided, the self-holding capacity of the ship is provided, and the operation cost is reduced.

The invention belongs to the technical field of surface treatment and in particular relates to a hard anodic oxidation pre-treatment technology applicable to protection of groove and blind hole parts.A flow of the hard anodic oxidation pre-treatment technology comprises the following steps: inspecting and accepting a workpiece; removing gasoline; insulating protection glue of the groove and blindhole parts; hanging; chemically removing oil; washing with hot water; washing with cold water; carrying out acid etching; washing with the cold water; washing with the cold water; carrying out hard oxidation; washing with the cold water; washing with the cold water; sealing; washing with the cold water; washing with the cold water; drying; detaching; drying; removing insulating glue; checking. According to the hard anodic oxidation pre-treatment technology provided by the invention, chemical oil removal and alkali etching procedures are not adopted so that corrosion risks are completely avoided; actual production proves that oxidation tint on the groove part of a product with a certain model can be avoided. By adopting the method, a condition that glue layers of the groove and blind holeparts are torn to fall off in a common partial hard anodic oxidation pre-treatment process so that the protection on the part becomes invalid can be avoided or a condition that alkali etching liquid is retained in a groove and a blind hole so that serious electrochemical corrosion on the part is caused can be avoided.

The invention relates to a flue gas waste heat utilization technology, in particular to a flue gas waste heat utilization process. The provided flue gas waste heat utilization process comprises the following steps: the flue gas generated after the combined firing of fuel and air in a burner (1) enters a heating furnace (2); the high-temperature flue gas from the heating furnace enters a low-temperature heat exchange device (5) after the heat exchange through a high-temperature heat exchange device (3) and a medium-temperature heat exchange device (4); and the combustion-supporting air is preheated in the low-temperature heat exchange device (5) via process medium or medium-temperature steam, and the temperature of the flue gas and the heated combustion-supporting air is decreased to about 150-200 DEG C. According to the invention, the flue gas waste heat is utilized to the utmost extent, the heat loss carried away by the flue gas and discharged in the atmosphere is reduced, the thermal efficiency of the heating furnace is improved, and the energy consumption of the whole process flow is reduced.

The invention discloses a shell-and-tube dry type evaporator. The shell-and-tube dry type evaporator comprises a distributor, arch-shaped baffle plates, heat exchange tubes and a barrel; one end of the barrel is closed, the other end of the barrel is open, the heat exchange tubes and the arch-shaped baffle plates are arranged in the barrel, the heat exchange tubes penetrate through the arch-shaped baffle plates, and a multi-stage distributor is arranged at the open end of the barrel; holes are formed in the top and the bottom of the barrel separately, a water side inlet pipe is mounted in the hole in the bottom, and a water side outlet pipe is mounted in the hole in the top; and a distribution channel is machined in the lower portion of an end cover and communicates with inlets of the heat exchange tubes, a convergence cavity is machined in the upper portion of the end cover and communicates with an outlet of a heat exchanger, and an outlet is formed in the convergence cavity. According to the shell-and-tube dry type evaporator, the distributor is simple in structure, can be machined through laser cutting, linear cutting and other machining methods, and is low in manufacturing cost and convenient to popularize and use on a large scale; and through the design and use of an inlet distributor and the arch-shaped baffle plates, the amount of heat exchange tubes is reduced by 30% or above.

The invention discloses a structure for reducing shaft voltage of a PWM inverter driving type plastic package motor, which relates to the field of motors. In the existing PWM inverter driving type plastic package motor, a high-frequency switch of a power element can cause change of common-mode voltage and parasitic capacitance at each position in the motor, so that a potential difference is generated between an inner ring and an outer ring of a bearing, an oil film of bearing lubricating grease is easily damaged, the bearing is damaged by electrocorrosion, and electrocorrosion generated by theinner ring, the outer ring and a ball is always a key factor influencing the service life of the motor. According to the structure disclosed in the invention, a front end cover and a rear end cover are connected through a conductive piece to realize equipotential, and a capacitor is connected between the conductive piece and a stator core. Effective conduction among the front end cover, the rearend cover and the stator iron core is conveniently realized, the equipotential is formed, the capacitor is arranged between the end cover and the stator core, a proper amount of capacitance is added,and finally, the external induction capacitance of the inner ring and the outer ring of the bearing is balanced, so that the shaft voltage is effectively reduced, the electrocorrosion risk of the bearing is avoided, the service life of the motor is prolonged, and the reliability is improved.

A compressor housing resistant to a titanium fire (burning titanium). A mixed housing is constructed, in which a structure holding stator blades includes a single-cast part made from titanium or titanium alloy, and at least one element forming a shield made from refractory alloy(s), and which is incombustible in presence of burning titanium, where each shield is secured to the single-cast part by fasteners. The fasteners are positioned with each shield so as to define jointly an inner wall demarcating an outer contour of the compressor airstream.

The invention relates to a swing type high-power X-ray conversion target device which comprises a conversion target and a supporting assembly used for supporting the conversion target, the conversion target and the supporting assembly are arranged below a scanning window, the supporting assembly comprises a supporting frame and a motor driving mechanism, and the supporting frame comprises a frame body and guide rails arranged on the two sides of the frame body; motor driving mechanisms are arranged on the guide rails on the two sides, each motor driving mechanism comprises a driving motor, a pulley and a connecting plate, the pulleys are arranged on the guide rails, the driving motors drive the pulleys to move and drive the connecting plates to move along with the pulleys, and the connecting plates are hinged to the conversion target. The supporting assembly drives the conversion target to do reciprocating rectilinear motion and reciprocating swing motion, long-time bombardment of electron beams at the same position of the target is avoided, the service life of the target is prolonged, and the uniformity of X-ray output is improved, and a cooling liquid pipe is arranged at the lower end of a metal composite plate of the conversion target. And a good cooling effect is guaranteed, meanwhile, direct contact between the cooling liquid and the heavy metal plate is avoided, and target corrosion hidden danger and sealing ring replacement problems are avoided.

The invention discloses a shell-and-tube heat exchanger with a refrigerant distribution device. The shell-and-tube heat exchanger with the refrigerant distribution device comprises a refrigerant outlet pipe, a distribution structure, a tube plate and a barrel. A tube plate is arranged at one end of the barrel; a heat exchange tube and a plurality of segmental baffles are arranged in the barrel; the distribution structure is arranged at a refrigerant inlet at one end of the barrel and comprises a refrigerant distribution tube, a cover plate and an end cover; the refrigerant distribution tube is connected with the cover plate; the cover plate is connected with the end cover; and the end cover is connected with the tube plate. The refrigerant distribution pipe comprises a first-stage distribution pipe, a first-stage transverse pipe, a second-stage distribution pipe, a second-stage transverse pipe and a third-stage distribution pipe; the first-stage distribution pipe communicates with the first-stage transverse pipe; the first-stage transverse pipe communicates with the second-stage distribution pipe; the second-stage distribution pipe communicates with the second-stage transverse pipe; and the second-stage transverse pipe communicates with the third-stage distribution pipe. The shell-and-tube heat exchanger with the refrigerant distribution device has the advantages that the whole size of the shell-and-tube heat exchanger is close to that of an existing product, the matching degree with a system is high, and replacement is convenient. By arranging the inlet distribution structure and the segmental baffles, the amount of heat exchange tubes is reduced by more than 30%.

The invention discloses a large-capacity electrochemical device individual structure. The structure comprises aluminum polar columns, an aluminum pot, cover plates, current collectors and an electrode roll core, wherein each of two end surfaces of the electrode roll core is connected with the current collector; the two current collectors are connected with the aluminum polar columns at two ends respectively; the aluminum polar columns are stepped columns; the cover plates sleeve the aluminum polar columns; an insulated ring is arranged between the end surface of one side of each cover plate and each aluminum polar column; a seal ring is arranged between the inner ring wall of each insulated ring and each aluminum polar column; the seal rings are pressed on the aluminum polar columns through plastic fixing blocks; the inner ring walls of the cover plates are isolated from the aluminum polar columns through the insulated rings and the plastic fixing blocks; and clamp springs are arranged at the upper parts of the plastic fixing blocks to perform locating. The invention furthermore discloses a large-capacity electrochemical device individual structure-based large-capacity electrochemical device individual assembling method. By adopting the structure and the method, the production process is simple; automated production is easy to realize; the product uniformity is improved; the production cost is reduced; the use of super capacitors in all industries is facilitated; and the aluminum pot is electrically neutral, so that the reliability is improved.

A bayonet type locking ring of a circular electrical connector. A first piece with the shape of a cylindrical ring extends from one end to the other. The first piece is made of thermoplastic material, and includes notches distributed over the internal face of the first piece adjacent to one end and a first ramp part on the internal face of the first piece. A second piece with the shape of a cylindrical ring, and includes notches distributed over its external face and a second ramp part on the internal cylindrical surface. The first piece and the second piece are assemblable such that the notches of the second piece fit in the notches of the first piece, and prevent the second piece from rotating in relation to the first piece. The second ramp part of the second piece complements the first ramp part of the first piece.

The invention discloses an auxiliary device for soldering pins of printed circuit boards, belonging to the technical field of soldering pins of circuit boards. The lower part of the inner baffle is supported on the upper edge of the pin hole of the circuit board. During the wave soldering process, the tin liquid flows upward through the gap between the pin and the pin hole, and is attached to the upper edge of the pin hole through the inner baffle tube, which can block the tin liquid overflowing upward and ensure the welding quality; and cooperate with the lower end of the outer sleeve It is attached to the surface of the circuit board to effectively prevent the contaminants from spreading and scattering around the surface of the circuit board; and is fastened with the pins through the small mouth end of the outer sleeve to prevent the contaminants from moving up along the pins and prevent the contaminants from entering. Inside the parts, the welding quality and welding safety are guaranteed; the overall structure is simple, the cost is low, the realization is easy, and the practicability is good.