32results about How to "Avoid corrosion damage" patented technology

The invention relates to the technical field of prefabricated structural parts, and particularly discloses a prefabricated butt joint steel structure which comprises a wall body, corner fixing frames are arranged at the corners of the wall body, cement board bodies are arranged on the two sides of the wall body, fixing devices are arranged at the two ends of each cement board body, clamping grooves are vertically formed in the corner fixing frames, and the fixing devices are arranged in the clamping grooves. Connecting grooves are formed in the front side and the rear side of the inner surface of the clamping groove, and the two ends of the cement board body are inserted into the clamping grooves in the corner fixing frames through fixers to be connected and fixed. The fixator comprises a built-in groove, a clamping block, an extrusion block, a connecting piece, a rotating shaft, a connecting strip, a first movable groove, a second movable groove, a butt joint groove, a bumper and a buffer assembly. The structure can prevent a large amount of rainwater from being injected, reduces corrosion damage caused by residual rainwater in the fixer, protects the cutting end of the cement board main body, prevents water from entering the cement board main body to corrode and damage the cement board main body, and prolongs the service life of the device structure.

The invention aims to provide a methanol / diesel oil dual-fuel single needle valve injector, and belongs to the field of engines. A methanol hydraulic on-off control assembly is installed in the methanol connector body and the on-off valve body, a diesel hydraulic on-off control assembly is installed in the diesel connector body and the ejector intermediate body, a methanol-diesel common nozzle assembly is installed in the nozzle body, a methanol pipeline connector is installed on the side of the methanol connector body, and a methanol pipeline is arranged in the methanol pipeline connector. A diesel pipeline connector is installed on the side of the diesel connector body, a diesel pipeline is arranged in the diesel pipeline connector, and a high-pressure methanol path and a high-pressure diesel path are arranged in the diesel connector body. The two fuel injection modes are controlled through the same needle valve, fuel is injected through the same injection hole, and an inner and outer needle valve nested structure which is high in machining difficulty and poor in reliability is avoided. In addition, in the methanol and diesel oil injection mode, diesel oil is introduced into a pressure chamber of the injector, and corrosion damage to a precise throttling hole in the injector caused by methanol fuel is avoided.

The utility model provides a water tank connecting structure and rowing machine, including the upper lid body and lower lid body of split, the circumference lateral wall surface of lower lid body around its upside opening is equipped with a plurality of clamping portions, the downside opening of upper lid body is provided with a circle and the clamping groove of lower lid body upside opening inlay, the inner side wall of clamping groove is equipped with a plurality of and the clamping hole of buckling cooperation one -to -one opposite with clamping portion, still including a sealing washer, the positioning groove of distributing around its circumference side is equipped with one side of sealing washer, the positioning protrusion of inlaying is provided with on the upside of lower lid body, positioning protrusion and the positioning groove of sealing washer inlay and integrally inlay in the inner bottom portion of clamping groove to form the seal, the utility model can realize upper lid body and lower lid body between more convenient, fast connection, significantly reduce the labor cost and time cost, keep upper lid body and lower lid body between good sealing performance simultaneously, can effectively prevent the water tank seepage problem, avoid the corrosion damage of seepage to rowing machine other parts, greatly prolong the overall service life of equipment.

The utility model discloses a kind of air energy water heaters with condensate water recovery device, it is related to air energy water heater technical field.The utility model includes collection mechanism, the collection mechanism includes collection mechanism including air energy water heater, the left side of the air energy water heater is provided with fixed plate, the left side top of the fixed plate is equipped with upper hopper, the lower portion of the upper hopper is equipped with lower hopper.The utility model is by being arranged collection mechanism, specifically is clockwise rotating knob, makes screw rod drive trapezoidal boss to move downwards, makes triangular block along trapezoidal boss bevel slide, and by two triangular blocks drive clamp block mutually close, finally two clamp block and boss are inserted together, so it can be controlled to the installation and disassembly of lower hopper by the rotating direction of hole knob, it is convenient to regularly clean container inside container and timely remove scale, prevent scale deposition and cause container corrosion damage, guarantee the service life of container.

The invention relates to the technical field of aging tests, and discloses a test device and method for accelerating material aging through multi-environmental factor coupling, and the test device for accelerating material aging through multi-environmental factor coupling comprises a test box body which is used for providing an aging degree test environment; the illumination system is mounted in the test box body and is used for providing irradiation for the test box body; the salt mist system is connected to one side of the test box body through a pipeline and is used for spraying salt mist into the test box body; and the gas mixing system is connected to one side of the test box body through a pipeline and is used for guiding various gases into the test box body. By adopting the multi-factor coupling material aging system, the combined action of multiple factors in a service environment is simulated, the process of a multi-factor coupling aging test is accelerated, the test steps are simplified, the test period is greatly shortened, the manual labor is reduced, and the system closely combines a salt fog factor with other environmental factors.

The invention discloses a heat recovery heat exchanger with a heat preservation function for smoked ducks, which comprises a tank body, two partition plates and a plurality of bent pipes, a flow guide cover is fixedly mounted on the left side of the tank body, a heat outlet is formed in the middle of the left side of the flow guide cover, and the two partition plates are fixed on the inner wall of the tank body; the two ends of the bent pipes penetrate through and are fixed to the ends, close to each other, of the two partition plates respectively, the gas guide assembly is arranged on the top face of the tank body, the round cover is fixedly installed on the right side of the tank body, the barrel shell penetrates through and is fixed to the middle of the right side of the round cover, and the motor is fixedly installed on the inner wall of the barrel shell. According to the device, grease in high-temperature flue gas is adsorbed in a large area through the activated carbon blocks, and therefore the situation that the grease in the high-temperature flue gas is accumulated in the bent pipe in a large area, and consequently the heat conduction effect of the bent pipe is poor is avoided.

This utility model relates to the field of sulfur incinerators, specifically to an in-furnace protection device for combustion-supporting gas in a sulfur dioxide incinerator. The utility model comprises a sulfur incinerator body, a fixed pipe, a jacketed sleeve, a cooling sleeve, a gas transmission pipe, and a coolant pipe. A circulation pump is connected to the external coolant pipe, and a storage tank is connected to the bottom of the circulation pump. A heat dissipation mechanism is installed on one side of the top of the storage tank. The coolant pipe, circulation pump, storage tank, and heat dissipation mechanism together constitute a cooling mechanism for the gas transmission pipe. During sulfur incinerator operation, combustion-supporting gas is transported to the inside of the sulfur incinerator body through the gas transmission pipe. The circulation pump pumps the coolant from the storage tank into the coolant pipe, causing the coolant to circulate within the pipe. The coolant absorbs heat and cools the gas transmission pipe, keeping it at a lower temperature during sulfur incinerator operation and preventing corrosion damage to the gas transmission pipe extending into the incinerator due to high temperatures.

This invention discloses a five-layer electrodeposited high-sealing corrugated pipe based on ultrasound assistance and its preparation method, belonging to the technical field of metal corrugated pipe manufacturing. It aims to solve the problem that in multi-layer electrodeposited corrugated pipes, it is difficult to effectively coordinate current density, surface quality, and interfacial bonding strength, leading to insufficient densification of the deposited layer, unstable interlayer bonding, poor wall thickness uniformity, and failure to meet airtightness standards, ultimately resulting in poor overall performance stability. This invention includes a five-layer composite structure in which the pipe wall is composed of alternating nickel-cobalt alloy and copper layers. Each layer of the five-layer composite structure undergoes ultrasonic vibration treatment during deposition. The corrugated pipe prepared by this invention has a uniform and dense deposited layer with good interlayer bonding. The five-layer alternating deposition layer composite structure not only achieves uniform stress transmission and dispersion, effectively delaying crack propagation and interfacial penetration, but also improves the uniformity of wall thickness distribution, enabling the corrugated pipe to exhibit higher structural stability and long-term reliability in a sealed environment.

The invention discloses an intelligent mechanical arm assembly for cooking, and relates to the field of mechanical arms, according to the intelligent mechanical arm assembly for cooking, through rotating connection between a rotating plate and a connecting groove and matching with the characteristic of an elastic material of an arc-shaped plate, when a spatula is driven to stir and fry in a frying pan, the contact pressure between the spatula and the frying pan is greatly reduced in the frying process, and the cooking efficiency is greatly improved. And the pressure is transmitted to the rotating plate, so that the rotating plate rotates in the connecting groove and presses the arc-shaped plate to be deformed and bent, in the bending process, the contact pressure between the spatula and the frying pan is buffered, meanwhile, in the buffering process, the angle of the spatula for lifting dishes in the frying pan is changed through rotation of the rotating plate, and the phenomenon that the spatula is damaged in the dish frying process is avoided. The contact pressure between the turner and a frying pan is large, kitchen ware is damaged, meanwhile, the turning-frying angle of the turner is changed through rotation of the rotating plate, and the turner can turn dishes smoothly.

The utility model discloses a cable support for electric power engineering, which comprises a support seat and a fixing rod, the side end of the support seat is fixedly connected with a connecting seat, the side end of the connecting seat is fixedly connected with a fixing column, the top end of the fixing column is provided with a circular groove, the outside of the fixing column is slidably provided with an adjusting cover, and the inside of the adjusting cover is fixedly connected with an internal thread pipe. The inner threaded pipe is located in the circular groove, the inner threaded pipe is in threaded connection with a screw, the bottom of the fixing column is in sealed rotation connection with a rotating shaft, one end, extending into the circular groove, of the rotating shaft is fixedly connected with the bottom end of the screw, the fixing rod is fixedly connected with the upper side of the side end of the adjusting cover, and the top end of the fixing rod is slidably provided with a plurality of cable bases. The top end of the cable base is connected with a cable pressing base through a first screw, rainwater is prevented from entering the circular groove, the rainwater is prevented from making contact with the inner threaded pipe and the screw, corrosion damage to the inner threaded pipe and the screw is avoided, and the service life of the screw is guaranteed.

The application belongs to the technical field of coal mill safety equipment, and discloses a medium-speed coal mill coal blocking alarm device, which comprises a controller, an alarm lamp and a sensor, a signal interface and an assembling cavity are respectively arranged on the back of the controller, and an intermediate hole is arranged in the inside of the back of the controller. The gas is pressed into the elastic air bag through the cooperation of the rotating extrusion, the inflation effect after the inside of the elastic air bag is ventilated is utilized, the signal connector maintains good sealing after being sleeved, the air in the signal interface is extracted when the movable plug in the suction assembly is moved by the cooperation of the operation assembly, the signal connector is adsorbed and fixed after being sleeved with the sealing frame under the negative pressure, the stability after actual wiring installation is greatly improved, good plug-in stability can be maintained under external force pulling or vibration effect, the situation of relaxation and disconnection can be effectively avoided, the frequency of arranging artificial maintenance and troubleshooting can be reduced, the use effect is good, and the monitoring and alarm are stable and reliable.

The utility model discloses a kind of deformation-preventing sickroom bathroom cabinet, it includes keel frame being arranged in the front side of wall body: the wall body includes original structure wall, the front side of the original structure wall is brushed with waterproof layer, the front side of the waterproof layer is brushed with structure adhesive layer, the keel frame includes vertical skeleton being arranged in the two sides of wall body front side. The utility model is by the setting of structure adhesive layer, so that multiple veneer brick can be fixed installation, in turn make to the effect of protection and device to wall body, by vertical skeleton and longitudinal skeleton cooperation, so that artificial stone countertop can be installed, in turn make to be able to install washbasin, by the setting of water turning assembly, so that sewage pipe can be installed, in turn make to be able to discharge sewage in washbasin inner cavity, by the setting of washbasin, so that bathroom cabinet can not be deformed due to indoor damp, i.

The invention relates to the technical field of liquid level control, in particular to a liquid level control system for an ammonia water environment, which comprises an ammonia water tank, an ammonia water pump, a liquid level sensor and a logic controller, the ammonia water tank is provided with a liquid inlet and a liquid outlet; a liquid inlet of the ammonia water tank is connected with a liquid outlet of the ammonia water pump; the liquid level sensor is arranged on the ammonia water tank; the logic controller is in communication connection with the ammonia water pump and the liquid level sensor; the liquid level sensor senses the liquid level of ammonia water in the ammonia water tank and sends a signal to the logic controller, and the logic controller sends an instruction to control whether the ammonia water pump supplements the ammonia water to the ammonia water tank or not. The liquid level in the ammonia water tank is synchronously controlled through two different control modes, the stability and reliability of ammonia water control are improved, and long-period safe operation is ensured.

The utility model discloses electromagnetic power supply master switch, including fixed base, be provided with a plurality of mounting hole on the fixed base, be connected with the electromagnetic switch body through the fixed mechanism on the fixed base, be provided with two binding posts on the electromagnetic switch body, the middle part of two binding posts is provided with interval seat, and the protective cover is connected with two first screws on the interval seat, and the side end fixed connection of electromagnetic switch body has the fixed ring, and the position that fixed ring is connected with the protective cover is provided with two threading port, and the first sealing washer is arranged between fixed ring and the protective cover, and the position that the first sealing washer corresponds with two threading port all is provided with the sealing ring on, and the top fixed connection of interval seat has the second sealing washer, and the protection of two binding posts is convenient for protection, avoids the object of conducting electricity and falls on two binding posts and leads two binding posts connection line intercommunication, avoids leading to the automatic start of corresponding equipment, avoids the emergence certain security risk.

The utility model relates to sound barrier technical field, concretely is a kind of sound barrier with protective structure, comprising: metal barrier, installation hole is equipped in the installation of metal barrier, recessed and convex plate is fixedly connected in the inside of metal barrier, mounting bracket is installed at the bottom of metal barrier, and mounting rail is set up in the assembling of mounting bracket;Beneficial effect is: PC board is installed on metal barrier by sliding mode, can be covered outside metal barrier, can be rust-proof, coating aging covering outside metal barrier, it is convenient for user to manually integral sliding assembling in metal barrier inside, need not regular inspection replacement, when PC board yellowing, transmittance drop, edge cracking etc., metal barrier is still protected in railway, highway etc. Traffic both sides, carry out protective installation, double-layer PC board and metal barrier not only can improve barrier effect, but also can be replaced at any time, PC board and metal barrier replacement process, can still work.

The present invention relates to a magnet pump equipped with a magnetic device, and more particularly, to a pump for pumping water, in which: a housing main body forms a water-introducing port through which water flows in and water is discharged; the driving motor is arranged in the shell main body; the impeller part is connected to a rotating shaft of the driving motor and is driven by the driving motor to rotate; the magnet pump is characterized in that the magnet pump is composed of a magnetic water film on the shell body and provided with a magnetic unit. According to the magnet pump configured with the magnetic unit, metal foreign matters in water flowing into the magnet pump are collected through magnetic force, the water is prevented from being polluted by the foreign matters, the metal foreign matters are prevented from being attached to a motor or an impeller to be corroded and damaged, the magnetic unit is detachably bonded to the magnet pump, and the metal foreign matters can be conveniently recycled from the magnetic unit; and the usability and the convenience are improved.

The invention belongs to the technical field of detection sampling, and particularly relates to safe sampling equipment for chemical wastewater detection, which comprises a wastewater storage tank, an ultrasonic liquid level meter and a PLC (programmable logic controller) arranged at the top of the wastewater storage tank, and further comprises a transferring assembly, a sampling assembly, a guiding and conveying cleaning assembly, a sample conveying assembly and a sewage discharge assembly. By adopting the design that the separated sampling barrel enters the tank and then is combined for sampling, the sampling depth can be adaptively adjusted according to the depth of sewage in the wastewater tank, multi-depth sampling is realized, and the sampling safety level is greatly improved through non-contact operation; a traditional pipeline pumping structure is abandoned, the pipeline laying and maintaining cost is effectively reduced, a pump and a pipeline are prevented from being corroded and damaged by chemical wastewater, the service life of equipment is prolonged, meanwhile, collected wastewater samples can be rapidly conveyed to a sample bottle, and a sampling shell, a guiding and conveying barrel and a guiding and conveying pipe are comprehensively cleaned; the previous sampling residue interference is avoided to guarantee the accuracy of the detection result.

The utility model discloses a steam turbine bearing bush temperature element circuit oil leakage prevention device which comprises a box body, a wire inlet is formed in one side of the box body, a sealing pipe is arranged on the other side of the box body, a cover plate is arranged on the upper portion of the box body, a first distributor plate and a second distributor plate are arranged in the box body, the bottom face of the cover plate is connected with a third distributor plate, and an oil collection cavity is formed in the lower portion of the box body. A clamping assembly is arranged at a connecting port of the sealing pipe and the box body, a plug is arranged at the end, away from the box body, of the sealing pipe, and a glue injection port is formed in the sealing pipe. Through the branching plate, the wire core of each branch wire bypasses the branching groove of each branching plate and is bent, lubricating oil leaked among thin wires of the branch wires is converged at the lower end of the bent branch wire under the action of gravity to form oil drops, the oil drops drop into the oil collection cavity at the lower part of the box body, and then sealant is injected into the sealing pipe through the sealant injection port. Gaps between circuits are filled with the sealant so as to prevent lubricating oil in the bearing bush from leaking outwards through the circuits of the temperature element to affect normal operation of unit components.

The present application relates to the field of environmental protection dust reduction technology of construction engineering, and provides an energy-saving construction engineering dust control device, which comprises a vehicle frame, a spray gun, a water tank, moving wheels and a water supply assembly, the moving wheels are arranged at the bottom of the vehicle frame and used for moving the device, the water tank is fixed to the top of the vehicle frame, the water inlet end of the water supply assembly is communicated with the water tank, and the water outlet end of the water supply assembly is communicated with the spray gun, the spray gun is installed above the vehicle frame through an angle adjusting mechanism, and the spray gun is provided with an openable and closable protection mechanism at the mist outlet end. The present application has the following beneficial effects: the openable and closable protection mechanism is arranged at the mist outlet of the spray gun, a plurality of closed pieces can be used to close and seal the mist outlet when the device is stopped, foreign matters such as dust, sand and cement ash in the construction site are completely blocked from entering the interior of the spray gun, the problems of nozzle blockage and corrosion and damage of internal components are effectively avoided, and the failure rate and maintenance cost of the equipment are greatly reduced.

This invention relates to the field of carbonaceous material reactor technology, specifically to a slag melter, comprising: a combustion aid distribution ring, which is a pipe arranged in a ring around the outer periphery of a discharger; a first pipe connected to the combustion aid distribution ring to introduce combustion aid; a gas-liquid fuel distribution ring, which is a pipe arranged in a ring around the outer periphery of the discharger; a second pipe connected to the gas-liquid fuel distribution ring to introduce gas-liquid fuel; multiple burners connected to both the combustion aid distribution ring and the gas-liquid fuel distribution ring; the multiple burners generate flames and high-temperature flue gas, which, in conjunction with the discharger, agitate, mix, oxidize, heat, and lift inorganic residues to produce molten liquid inorganic residues; this application distributes gas-liquid fuels and combustion aids as needed, fully mixes and combusts them, generates a stable high-temperature flame to agitate the inorganic residues according to operational needs, and adjusts the temperature of the inorganic residues, maintaining the slag level of the inorganic residues and ensuring smooth discharge.

The utility model discloses a backwash filter, including filter jar body and setting at the water inlet of filter jar body right end center upper side, the water outlet is provided with at filter jar body right end center downside, the water inlet and water outlet are close to the top and bottom of filter jar body respectively, the differential pressure switch is provided with at filter jar body left end center, the filter jar body inside is provided with the cylinder type filter screen, can with the original structure cooperation and promote cylinder type filter screen cleaning effect through the filter jar body additional novel efficiency decontamination device, reduce the block, prolong filter screen life, guarantee the filtration efficiency and reduce maintenance cost, the device is divided to the gas branch pipe of sending gas by ring type gas collector, is accurately spouted to the filter screen outer wall through the jet pipe head, the stubborn stain and small impurity that the stubborn stain and small impurity that traditional mechanical decontamination missed are cleaned up through the jet pipe head, realizes all -round deep -cleaning, avoids the filtration precision decline.

The utility model discloses an anti-corrosion corrugated sleeve complementary compensator which comprises a liquid inlet pipe, one end of the liquid inlet pipe is detachably connected with one end of a corrugated pipe, the other end of the corrugated pipe is connected with one end of a liquid discharging pipe through a connecting sealing piece, and a buffer spring is connected between the connecting sealing piece and a second positioning seat and located on the outer side of the liquid discharging pipe in a sleeved mode. A first positioning seat is arranged on the outer side of the connecting position of the liquid inlet pipe and the corrugated pipe, the corrugated pipe, the connecting sealing piece and the liquid discharging pipe are located in the protective cylinder, meanwhile, mounting flanges are symmetrically arranged at the two ends of the protective cylinder, and the middles of the interiors of the two mounting flanges are connected with the first positioning seat and the second positioning seat in a clamped mode respectively. According to the anti-corrosion corrugated sleeve complementary compensator, when the limiting cover plate, the limiting seat, the connecting rod, the mounting flange and the protective cylinder are matched for use, the liquid inlet pipe, the corrugated pipe and the liquid discharging pipe are protected, the connecting positions are prevented from being exposed in the external environment, corrosion damage is avoided, and later disassembly and maintenance are facilitated.

The application relates to a low-corrosion chip photoresist cleaning agent and a preparation method and application thereof, wherein the low-corrosion chip photoresist cleaning agent comprises the following components according to weight parts: 3-15 parts of organic strong base; 10-30 parts of alcohol amine; 0.05-10 parts of corrosion inhibitor; 20-45 parts of polar solvent; 0.1-16 parts of water-retaining agent; and 30-50 parts of ultrapure water. The application uses two kinds of compound corrosion inhibitors of polyaspartic acid and sodium metatungstate, and the polyaspartic acid and the sodium metatungstate not only can protect the metal and the substrate from corrosion alone, but also can synergistically improve the metal protection capacity.

This utility model relates to the field of LED lighting technology, and in particular to an LED lighting protection device, including a PCB connecting board and connecting lines. A lamp housing assembly is fixedly connected to the outside of the PCB connecting board. A protective component is fixedly connected to the front end of the lamp housing assembly by bolts. A glass plate is fixedly connected to the inside of the protective component. An LED bead is fixedly connected to the front end of the PCB connecting board. The protective component includes a frame plate. A hollow shell is fixedly connected to the inside of the frame plate. A flow groove, a fixing port, and a pressure relief hole are opened on the inside of the hollow shell. A rubber sheet is fixedly connected to the inside of the pressure relief hole. A copper tube is fixedly connected to the inside of the fixing port. An internal channel is opened on the inside of the copper tube. A filter plate is fixedly connected to the inside of the hollow shell. In this utility model, the device can effectively prevent moisture from damaging the LED lighting fixture, and at the same time prevent safety hazards caused by heat accumulation inside the LED lighting fixture, improve practicality and safety, and ensure stable operation in humid environments.

The application discloses a controllable stripping and plating method for a diamond-like carbon coating on a workpiece surface, and is aimed at processing a workpiece with a diamond-like carbon coating on the surface, and comprises the following steps: adopting oxygen plasma to bombard the surface of the workpiece after pretreatment, completely stripping carbon substances on the surface layer of the workpiece, and converting part or all of a transition layer deposited in gas phase into a metal carbon / oxide compound; then immersing the workpiece after the oxygen plasma bombardment in an alkaline immersion liquid A and an alkaline immersion liquid B in sequence, completely stripping the metal carbon / oxide compound remaining on the surface of the workpiece, and performing chemical polishing on exposed metal substances. The application does not damage the water plating metal layer, the stripping and plating quality is easy to control, and is beneficial to industrial production.

The utility model belongs to the technical field of papermaking pulp moisture monitoring, and particularly relates to a papermaking pulp discharge moisture monitoring device which comprises a moisture meter and a display screen installed on the surface of the moisture meter, one end of the moisture meter is connected with an electric wire, and the other end of the electric wire is connected with a detection handle. One end of the detection handle is provided with a probe. A probe is arranged on the detection handle, a protective cover is connected to one end, close to the probe, of the detection handle, and mounting side plates are connected to two sides of the protective cover, so that the mounting side plates on the side edge of the protective cover are in butt joint along the detection handle, and then the protective cover is driven to protect the probe; according to the protective cover, the elastic plate is arranged on the mounting side plate, so that the sliding block on the inner side of the mounting side plate is driven to extrude the elastic plate along the buckle, the buckle is conveniently embedded into the opening in one side of the sliding block, the protective cover is conveniently and stably mounted, the probe is conveniently protected, corrosion damage to the probe is avoided, and meanwhile, safety accidents of surrounding personnel are avoided.

The utility model relates to the technical field of sealing protection structures, in particular to an acid leakage prevention sealing protection structure of an acidification anti-reflection drill hole in coal mining. In order to solve the problems that an acid solution injected into a coal seam flows out along a drill hole in the acidification anti-reflection operation of coal seam mining, the solution is wasted, and the acidification anti-reflection effect is reduced, the following technical scheme is provided: the acidification anti-reflection device comprises a blocking plate; the positioning assembly is arranged on the side, close to the coal seam, of the blocking plate and inserted into the drill hole; the sealing mechanism is arranged on the blocking plate and is used for sealing the drilling position; the adjusting assembly is located on the side, away from the positioning assembly, of the blocking plate and used for driving the positioning assembly to be fixed in the drill hole. The acid solution can be effectively prevented from flowing out along the drill hole, solution waste is reduced, the acidification anti-reflection effect is guaranteed, and corrosion damage to the surroundings is avoided.

This invention discloses an ultrasonic coupling cleaning process for printed circuit board substrates, belonging to the field of printed circuit manufacturing technology. The process includes cleaning solution preparation, pretreatment, ultrasonic coupling cleaning, gradient temperature field stabilization, microbubble-enhanced separation, post-treatment, and drying steps. The cleaning solution is free of hydrogen peroxide and stabilizers, employing a low-alkali system combined with frequency conversion ultrasound to achieve efficient removal of adhering substances. A gradient temperature field promotes the full diffusion of impurities between fibers, followed by in-situ adsorption and flotation via micro-nano bubbles to complete three-phase separation. This invention significantly improves the cleanliness of glass fiber electronic cloth, with a residual impurity index (LOI) ≤0.08% and a tensile strength retention rate ≥95%. The entire process involves no high-temperature calcination or damage from strong oxidants, resulting in low energy consumption, easily treatable wastewater, and strong process adaptability. It is suitable for efficient and green cleaning of high-end electronic reinforcing substrates such as printed circuit boards and electronic packaging materials, meeting the needs of large-scale production.

This utility model relates to the field of elevator retrofitting technology in old residential communities, and discloses an elevator column corner protector, including a mounting plate, a guide section, and a corner protector plate; the mounting plate has a cross-shaped cross section with four vertical included angles, one of which is the first included angle, and the vertical included angle diagonally opposite to the first included angle is the second included angle; the guide section is disposed on the outer wall of the two sides of the first included angle, and the guide section includes multiple guide grooves evenly distributed horizontally along the outer wall, and each guide groove is disposed vertically along the outer wall; the corner protector plate includes a connecting plate with a right-angled fan-shaped cross section and an extension plate fixed perpendicularly to the two arc-shaped end faces of the fan; this utility model can vertically guide rainwater falling on the back side of the outer panel by providing multiple guide grooves on the mounting plate, thereby preventing rainwater from flowing horizontally or obliquely into the elevator shaft along the outer panel, effectively avoiding the problem of electrical equipment corrosion caused by rainwater leakage.

This application relates to a self-preheating burner, belonging to the technical field of heat treatment furnace accessories. It includes a preheating chamber, a flue gas duct, an inner tube, a pre-combustion chamber, a baffle cover, a gas pipe, a heat exchange assembly, heat exchange fins, and an ignition assembly. The preheating chamber has an air inlet and a flue gas outlet; the flue gas duct is located on one side of the preheating chamber and connects to its interior; the inner tube passes through both the preheating chamber and the flue gas duct; the pre-combustion chamber is located inside the outlet end of the inner tube; the gas pipe passes through the inner tube and connects to the pre-combustion chamber; the heat exchange assembly is located inside the preheating chamber and outside the inner tube; the heat exchange fins are located between the flue gas duct and the inner tube, forming a first channel and a second channel; the ignition assembly is used to ignite the gas. This application constructs a two-stage heat exchange structure through the heat exchange assembly and heat exchange fins. The combustion air is preheated twice before entering the pre-combustion chamber, significantly improving waste heat recovery efficiency and reducing exhaust gas temperature and nitrogen oxide emissions.