87results about How to "Reduce rust" patented technology

The invention relates to the technical field of thread rolling machining, and discloses penetrating rod thread rolling equipment for an automobile air brake, the penetrating rod thread rolling equipment comprises a plurality of sets of thread rolling mechanisms which are sequentially connected in series, and each thread rolling mechanism comprises a feeding assembly, a thread rolling machining assembly, a discharging assembly, a feeding assembly and a detecting assembly; the detection module is used for detecting materials, the discharging module is used for discharging unqualified materials, and qualified materials can enter a thread rolling station; the thread rolling machining assembly is used for conducting thread rolling machining on the materials at the thread rolling station. The hopper in the subsequent thread rolling mechanism is in butt joint with the discharging assembly in the previous thread rolling mechanism. Three sections of threads are machined at a time by splicing the three thread rolling mechanisms, automatic conveying is achieved between the adjacent thread rolling mechanisms, materials do not need to be manually conveyed in sequence, the production efficiency is remarkably improved, and manual intervention is reduced; before entering the thread rolling process, the penetrating rod is subjected to at least one detection, defective products are eliminated, and the production requirements of high-precision parts are met.

The invention relates to the technical field of power grids, and discloses a horizontal flywheel energy storage system and a system control method, and the system comprises a flywheel energy storage unit, a first-stage connector, a double-fed motor and a system control unit. The flywheel energy storage unit is rigidly or flexibly connected with a rotor of the doubly-fed motor through the primary connector; a stator of the double-fed motor is electrically connected with an alternating current power grid; the system control unit is electrically connected with the flywheel energy storage unit, the primary connector and the double-feed motor; wherein the flywheel energy storage unit, the primary connector and the doubly-fed motor are all horizontally arranged, and the flywheel energy storage unit adopts vacuum sealing. The flywheel energy storage unit, the first-stage connector and the double-fed motor are all arranged in a horizontal mode, a larger and heavier flywheel rotor can be supported, the rotational inertia of the flywheel rotor is increased, and then the capacity of the horizontal flywheel energy storage system for providing the rotational inertia for an alternating current power grid is improved.

The application belongs to the technical field of electrical equipment, and discloses an air compressor sealing structure and an air compressor. The air compressor sealing structure comprises a connecting sleeve, a first gas seal assembly and a second gas seal assembly. The connecting sleeve is sleeved on the rotating shaft of the air compressor, and has opposite first and second ends. The first gas seal assembly is arranged at the first end, and is sleeved on the rotating shaft and connected with the bearing of the rotating shaft to seal the gap between the first end and the rotating shaft by means of sealing gas. The second gas seal assembly is arranged between the connecting sleeve and the rotating shaft and at the second end to seal the gap between the second end and the rotating shaft by means of water vapor. The connecting sleeve is provided with an exhaust hole between the first gas seal assembly and the second gas seal assembly. In this way, the possibility of gas contacting the bearing is reduced, and the possibility of damage to the bearing is reduced, thereby effectively improving the reliability of the air compressor sealing structure and enabling the air compressor to operate reliably for a long time.

The present invention belongs to the technical field of cable cover plates, and discloses a cable cover plate and a method of using the same, including a shell, a telescopic limit assembly, a handle, and a plurality of slide plates; ribs are evenly distributed in the middle of the shell; a telescopic limit assembly is installed between the ribs and the side walls of the shell; a handle is installed between the telescopic limit assemblies; the top of the shell is open, and slide rails are provided on both sides; the two sides of the slide plate are slidably connected to the slide rails respectively. By adding a slide plate, the cable cover plate can be connected to the slots of the cable trench on both sides through the slide plate after installation, and there is no need to fill mud, which reduces the rust of the shell caused by the accumulation of silt water, increases the overall service life, reduces the workload of personnel, and is also convenient to lift, saving time and effort; the telescopic limit assembly is used to limit the cable cover plate during installation, reducing the regular external force that causes the displacement of the cable cover plate, and improving the overall safety factor.

The utility model relates to the technical fields of bridge, especially a kind of quick installation recoverable anti-falling beam limiting device for bridge, which reduces the contact of rain and air with steel wire rope, delays the rust of steel wire rope, improves the service life of steel wire rope, is convenient to use, and is high in practicality;It comprises a pier and a bridge, and the bridge is fixedly installed on the upper end of the pier;It also comprises two groups of connecting plates, two groups of connecting rings, a steel wire rope and a protection mechanism, the two groups of connecting plates are fixedly installed on the pier and the bridge by expansion bolts respectively, connecting rings are fixedly installed on the two groups of connecting plates, the upper and lower ends of the steel wire rope are fixedly installed on the two groups of connecting rings respectively, the protection mechanism is installed on the steel wire rope, and the protection mechanism is used for protecting the steel wire rope.

The invention relates to the technical field of information acquisition devices, in particular to a handheld sample information machine which comprises an ink-jet printer body, a display screen and an ink-jet nozzle are mounted on the outer side of the ink-jet printer body, and a positioning assembly used for positioning the ink-jet position of a packaging carton is mounted on the outer side of the ink-jet printer body; the positioning assembly comprises a transverse frame with one end movably penetrating through the ink-jet printer body, the top of the transverse frame is provided with a ventilation groove penetrating through the transverse frame, one side of the transverse frame is open, one end of the transverse frame is provided with a sealing plug movably penetrating into the transverse frame, and one side of the ink-jet printer body is provided with a separation assembly used for separating the internal space of the transverse frame. The end, away from the sealing plug, of the transverse frame is fixedly connected with a spring, the partition assembly comprises a partition plate slidably connected with the inner wall of the transverse frame, and a sliding block is arranged on one side of the partition plate. The problems that the packaging carton in the moving process is difficult to position, and the dislocation degree of sample information code spraying is reduced are solved.

The utility model discloses a kind of widening structure of municipal road, including the filling plate as widening base layer, the accommodating groove of downward recess is equipped on filling plate upper surface, the rubber particle layer solidified by cementing agent is filled in accommodating groove, the groove bottom of accommodating groove is equipped with reinforcing plate that is interlaced longitudinally and transversely, reinforcing plate is fixedly connected with filling plate, for enhancing the overall stiffness and deformation resistance of widening structure, the bottom of filling plate is connected with connecting assembly, connecting assembly includes the connecting column inserted into soil, the outer wall of connecting column is equipped with the plug-in cone for increasing friction, connecting column is equipped with expansion assembly in, expansion assembly includes the pull block for making the outer wall of connecting column outwardly offset, the surface of filling plate, connecting assembly and expansion assembly is equipped with rust-proof paint. By filling plate and rubber particle layer combination, it is convenient to quickly lay, also can cope with certain degree of thermal expansion and cold shrink, the cooperation of connecting column and expansion assembly realizes firm anchoring with ground.

The utility model provides a gate valve with antirust function, including the valve body, set up in the upper end of valve body gland, open in the opening on gland, set up in the upper end of gland hand wheel, set up in the valve body and with hand wheel threaded connection's valve rod, still include two cooperation seat that set up in the valve cover in opening inside up and down symmetry, open in two cooperation seat's avoidance opening, set up between two cooperation seat and located valve rod outside's insulating sleeve, set up in the upper end of rotating hand wheel and located valve rod's outside's insulating cavity, open in the upper end of top rod cover and with insulating cavity intercommunication's top opening, slidable set up in top rod cover in top opening inside's prompt rod, set up in top rod cover's elastic cover.

The utility model discloses an aluminum cup with good anti-corrosion effect in the field of textile aluminum cups, which comprises a rotating rod, an aluminum cup body, a protective mechanism and a connecting mechanism, the aluminum cup body is fixedly connected to the top of the outer side of the rotating rod through the connecting mechanism, the protective mechanism is fixedly connected to the outer side of the aluminum cup body, and the connecting mechanism is fixedly connected to the outer side of the aluminum cup body. The inner side of the aluminum cup body is sleeved with a lining, and the top of the lining is fixedly connected with a mounting ring. According to the aluminum cup with the good anti-corrosion effect, the lining is mounted in the aluminum cup body, the inserting rod is pulled, the connecting spring is stretched, the outer side of the aluminum cup body is sleeved with the outer lining, the connecting spring is loosened, and the outer lining is rotated; and through resetting of the connecting spring, the inserting rod is embedded in the inserting hole, and the outer lining is fixed, so that the outer side of the aluminum cup is protected, corrosion to the aluminum cup is reduced, the anti-rust capacity of the aluminum cup is improved, and the service life of the aluminum cup is prolonged.

The application relates to an intelligent table lamp based on a millimeter wave radar, which comprises a base, the top end of the base is fixedly connected with a lamp post, the end, away from the base, of the lamp post is fixedly connected with a clamping joint, the clamping joint is internally provided with a clamping piece, a square piece is inserted between the clamping joint and the clamping piece, the inside of the square piece is threadedly connected with a locking bolt, the square piece and the clamping piece are connected through the locking bolt, the side, away from the lamp post, of the clamping piece is fixedly connected with a lampshade, and the bottom of the lampshade is fixedly installed with an illuminating lamp. The application has the beneficial effect that when the illuminating lamp at the bottom of the lampshade is damaged, the table lamp does not need to be replaced as a whole, only the locking bolt needs to be unscrewed, the square piece and the clamping piece need to be separated, the lampshade can be separately disassembled and the illuminating lamp can be replaced, and through the protective plates on the two sides of the clamping joint, the locking bolt can be importantly protected, so that rusting of the locking bolt caused by external water vapor is reduced, and normal use of the table lamp is ensured.

The invention discloses a composite film etching solution and application thereof in etching of a copper layer and nickel layer composite film, and belongs to the field of chemical etching of electronic equipment. The etching solution comprises the following main components: sulfuric acid, hydrochloric acid, ferric chloride, oxalic acid, hydrogen peroxide, sodium sulfate, glutamic acid and the balance of ultrapure water. The etching solution can be used for etching a copper and nickel composite film, the etched edge is flat and smooth, the taper angle is proper, the etching speed is high, no insoluble substance is generated, the operation is simple, the consumed time is less, and the etching solution is suitable for industrial batch production.

The utility model discloses a wheel protecting ridge structure, which belongs to the technical field of wheel protecting ridges and comprises a wheel protecting ridge body mounted on the edge of a foundation and a plurality of protecting plates capable of covering the outer side of the wheel protecting ridge body. The lower edge of the inner side of the protection plate is bent inwards to form a horizontal folded edge, a plurality of positioning holes are formed in the horizontal folded edge, a first bolt upwards penetrating through the positioning holes is installed on the foundation in a positioning mode, and a first nut is screwed on the first bolt. The protection plate made of steel is attached to the outer side of the wheel protection ridge body of an original steel-concrete structure in a wrapping mode, the first bolts penetrate through the positioning holes and are screwed and pressed through the nuts, and protection on the wheel protection ridge body is effectively achieved; damage and corrosion to the wheel protection ridge body are greatly reduced, the service life of the wheel protection ridge body is effectively prolonged, the outer protection plate is convenient to disassemble, assemble and replace, the maintenance period is effectively shortened, and influences on normal operation are avoided. The overall structure is simple, implementation is easy, and practicability is good.

The utility model relates to the technical field of water pump high-voltage frequency converters, in particular to a condensate pump high-voltage frequency converter convenient to assemble, which has the characteristic of convenience in disassembly and comprises a condensate pump and a high-voltage frequency converter, a wire connecting seat is arranged at the top of the condensate pump, and a plurality of threaded holes are uniformly formed in the periphery of the wire connecting seat. A bolt is in threaded connection with the interior of each threaded hole, and the bolts and the base are fastened and connected in a threaded connection mode; a sliding groove is formed in the upper portion of the base, a sliding plate is slidably connected into the sliding groove, and the upper surface of the sliding plate is fixedly connected with the bottom of the high-voltage frequency converter. A sliding hole is formed in the middle of the base, an inserting rod is arranged in the sliding hole in a sliding mode, an inserting hole is correspondingly formed in the middle of the sliding plate, and when the sliding plate slides to a preset position along the sliding groove, the inserting rod can be inserted into the inserting hole, so that the sliding plate and the high-voltage frequency converter are fixed to the base.

The invention relates to the technical field of building equipment, in particular to a movable protective hanging rack and a control method thereof, the movable protective hanging rack comprises a supporting mechanism and a supporting platform, and the supporting mechanism comprises a first connecting seat; the supporting platform comprises a second connecting seat, and a fastening mechanism is arranged between the first connecting seat and the second connecting seat; the fastening mechanism comprises a connecting assembly and an abutting assembly. The connecting assembly comprises a connecting stud and a locking nut which are installed on the first connecting base and the second connecting base in a penetrating mode. The abutting assembly comprises a supporting base fixedly arranged on the second connecting base, an abutting elastic piece is arranged on the supporting base in an embedded mode, and the abutting elastic piece faces the locking nut and abuts against the locking nut. The abutting elastic pieces apply elastic force to the locking nuts so that the locking nuts can abut against each other to achieve looseness prevention, connection with the connecting studs is guaranteed, the safety and stability of the protection hanging frame are effectively guaranteed, and meanwhile vibration reduction can be achieved on the platform body through the buffering mechanism.

The utility model discloses a kind of anti-deformation supporting devices of wheel hub mould, belong to the technical field of wheel hub mould supporting structure, including shade cover, upper pressure rod, lower bearing rod, lower cross pipe, end connecting plate and locking bolt.Shade cover top is equipped with dehumidification structure, both sides are equipped with upper pressure rod and form top shade structure, upper pressure rod is pressed on the casting surface side slope of wheel hub side module, lower bearing rod is equipped below, lower cross pipe is equipped between two lower bearing rods and forms bottom supporting frame, top shade structure and bottom supporting frame two ends are equipped with end connecting plate.The utility model is convenient to install and can be reused, can provide effective support and protection to these key parts such as wheel hub side module's casting surface and casting surface joint line after wheel hub side module production is completed, to effectively reduce the risk of physical deformation or corrosion in transportation and storage process.

The utility model relates to the field of buildings, in particular to a large-span structure metal roof anti-tripping anchoring connecting device which comprises a bottom layer support, a suspended ceiling layer and a dustproof layer are sequentially installed on the top of the bottom layer support from bottom to top, and a plurality of main purlins are transversely installed on the top of the dustproof layer at equal intervals. The supporting plates are jacked up through the telescopic pieces, so that the metal roof, the heat preservation layer and the waterproof layer are tightened, gaps caused by aging are avoided, the service life of the metal roof can be prolonged, vibration of the metal roof can be avoided, the matched connecting plates are installed to penetrate through the matched installing grooves, the limiting effect can be achieved, the supporting plates are prevented from shaking, and the service life of the metal roof is prolonged. Meanwhile, the metal net is matched to cover the bottom of the T-shaped fixing support so that the fixity can be improved, then the non-woven fabric can well prevent water, and the situation that the connecting position rusts is delayed.

This utility model belongs to the technical field of daily necessities, specifically a metal frame bed that is easy to install. It includes a bed frame; the bed frame contains a bed body for supporting a mattress. The key feature is that the bed frame includes a pair of parallel longitudinal beams and a pair of parallel transverse beams perpendicular to the longitudinal beams. The lower end face of the longitudinal beams has corner legs for supporting and fixing the bed frame. The transverse beams are located at both ends of the longitudinal beams and are detachably connected. The end walls of the corner legs are detachably connected to the longitudinal beams by bolts. By connecting the longitudinal beams, transverse beams, and corner legs with bolts, the assembly and disassembly of the bed frame are facilitated, as is the transportation of the entire metal frame bed.

The utility model relates to the technical field of liquid level measuring instruments, and particularly discloses an electric contact liquid level meter which comprises a measuring cylinder, an electrode holder, a pressing cap and an electrode, the electrode holder is arranged on the outer wall of the measuring cylinder, the electrode is arranged in the electrode holder, and the pressing cap is in threaded connection with the end, away from the measuring cylinder, of the electrode holder. The pressing cap is used for abutting against the end of the electrode, the outer side of the electrode base is sleeved with a sealing ring, one side of the sealing ring abuts against the pressing cap, and an abutting assembly used for pressing the sealing ring is arranged on the electrode base. The possibility of rusting of the threaded section between the pressing cap and the electrode holder can be reduced.

The utility model relates to a punching hook device for a straight pickling line, and belongs to the technical field of pickling lines. Comprising two flushing units, the two flushing units are symmetrically arranged on the two sides of an immersion cleaning tank body, supporting boxes are arranged at the two ends of the upper portion of the immersion cleaning tank body, and a C-shaped hook is supported in the two supporting boxes; any flushing unit comprises a flushing pipeline, a tap water connector is connected to the flushing pipeline, a plurality of flushing nozzles are arranged on the flushing pipeline, and the spraying directions of the flushing nozzles face the C-shaped hooks; tap water flows into the flushing pipeline through the tap water connector and then is sprayed to the C-shaped hook through the flushing nozzle. The supporting boxes are respectively provided with a gravity induction sensor. A valve is arranged on the tap water connector, and the gravity induction sensor is in signal connection with the valve. The device is simple in structure and convenient to operate, acid liquid accumulated on the C-shaped hook can be automatically removed, material surface dripping rusting caused by the acid liquid on the C-shaped hook is reduced, and the labor intensity is reduced.

The utility model relates to kitchen support technical field, especially a kind of multifunctional kitchenware placing support, including bottom plate, the edge of the both sides of bottom plate top surface is uniformly fixedly connected with support frame, several water receiving trays are fixedly connected with several pot body supports around the top of several water receiving trays between two support frames jointly fixed connection has. The utility model has the advantages that: through the lifting structure of one intermediate high four around bottom formed by several pot body supports, the inner wall of pot body is effectively supported from the middle, so that the pot can be placed upside down, so that the water in the pot body can flow into the inside of water receiving tray, the water in the pot is placed, the corrosion of pot is reduced, and the inner wall of pot is erected, so that the inner wall is dry, the pot is effectively supported and positioned by several pot body supports, the pot is prevented from falling, the water in the inside of several water receiving trays is gathered and discharged through the communication pipe and several drain pipes, and the water is discharged into collection box through drain hole, so that water is concentrated and collected.

The utility model discloses a terrazzo floor grinding machine, specifically relates to floor polishing technical field, including work platform, the hidden rotation of grinding disc has rotation in work platform front end bottom, is installed with push handle at work platform rear end top, is installed with equipment box on work platform top surface, is installed with the drive motor and sewage tank of driving grinding disc rotation at equipment box top, is equipped with the sewage recovery part of fixed in work platform bottom at the rear side of grinding disc, is connected with the sewage pipe of bending between sewage recovery part and sewage tank, is provided with semicircular water body shielding piece on the both sides of sewage recovery part and grinding disc. The utility model can shield and recover the water body sputtering produced in the working process of grinding disc, improves the effect that terrazzo floor is polished, and after operation, it is convenient to clean the grinding disc, guarantees the cleanliness of equipment surface, reduces the corrosion phenomenon of equipment because of silt and other impurities adhesion, prolongs the service life of equipment.

The utility model provides a kind of water tank mechanism of circulating filter type water detection machine, including water tank, water inlet pipe, water outlet pipe, water tank is equipped with the filter tank, water pump, pressure tank connected in sequence, the water inlet pipe is connected the water tank inner chamber with the filter tank, the water outlet pipe is connected the water tank inner chamber with the pressure tank. The utility model can make detection water recycling by increasing circulating filter device, and effectively ensure the water quality in water tank, avoid the influence of water quality on detection effect, while reducing the rust condition of water tank, prolong the service life of equipment;At the same time, intelligent water replenishment can be realized, so that the water level is maintained at a reasonable level, and the detection stability is improved.

The invention relates to the technical field of metal coating surface treatment, and discloses a surface treatment method of a zinc-nickel coating, a passivation solution provided by the invention contains composite modified silicon carbide and modified epoxy resin, and the composite modified silicon carbide and the modified epoxy resin form a layer of compact protective film on the surface of the coating. The protective film can effectively prevent external corrosive media from invading, so that the corrosion resistance of the plating layer is improved; the silicon carbide inorganic material selected by the invention has excellent wear resistance, and can effectively prevent the protective film layer from being worn and broken; meanwhile, an alkyl long-chain structure in the composite modified silicon carbide and a polysiloxane structure in the modified epoxy resin have excellent flexibility, so that the protective film layer can better adapt to deformation of a matrix under the action of external force, the risk of cracking of the protective film layer is reduced, and corrosion of the surface of the coating material is delayed.

The invention discloses a novel road guardrail cleaning device which comprises a telescopic arm, and further comprises a mounting bracket, a cleaning device, a cleaning device and a cleaning device, and is characterized in that the mounting bracket is fixedly mounted on the telescopic arm; and the cleaning component is mounted on the mounting bracket. Water drops left on the surface of the cleaned guardrail are wiped in all directions, water stain residues and guardrail corrosion are avoided, a cleaning tool is squeezed dry and impurities in the cleaning tool are removed during wiping, it is ensured that the surface of the guardrail cannot be polluted again in the wiping process, water collected during wiping is reused, the use efficiency of the water is improved, and the cleaning tool is convenient to use. The cleaning frequency of the extrusion rod is automatically regulated and controlled according to the water quantity during collection, the using effect of the extrusion rod is guaranteed, the service life of a cleaning tool is prolonged, secondary pollution is prevented, the follow-up maintenance frequency is reduced, the surface of the guardrail can be protected, the service life of the guardrail can be prolonged, the cleaning efficiency and safety can be improved, and efficient utilization of the cleaning tool is guaranteed. And the possibility of rusting, freezing and dust adhesion after the guardrail is cleaned is reduced.

The utility model belongs to the technical field of manual stop valve, specifically is a kind of manual stop valve, including manual stop valve body;Manual stop valve body lateral wall is equipped with protective shell;The inboard wall of the protective shell is fixedly connected with drive motor;The output end of the drive motor is fixedly connected with fan blade;Drive motor is rotated to produce airflow with fan blade, airflow passes heating wire at this time, using the air flow of guide plate can be drained, it is dispersed, the dry effect when manual stop valve body is used in humid environment is played, reduce the humidity long time adhesion and cause the rust of manual stop valve body, to improve the service life of manual stop valve body, the contact area of airflow and manual stop valve body can be increased simultaneously using flow guide pipe and guide plate, increase drying speed, and also using protective shell can increase the safety of drive motor when using.

The invention discloses an anti-corrosion method for flaw detection of a medium-thickness steel plate. Domestic water and a water-based anti-rust solution are mixed to serve as a coupling agent for flaw detection to be sprayed on the steel plate; after flaw detection is completed, a wear-resistant scraping plate is tightly attached to the surface of the flaw detection plate, and the coupling agent is scraped; and in the process of transferring the flaw detection plate from the cooling bed to the side conveying ground roller, the flaw detection plate is kept in an inclined posture. The problem that an existing medium-thickness steel plate is prone to rusting after being subjected to flaw detection by using domestic water as a coupling agent is solved.

The invention discloses a continuous plastic dipping production process for C-shaped steel, and relates to the technical field of building materials. The C-shaped steel continuous plastic dipping production process comprises the steps that a core material is fed into heating equipment to be preheated; the preheated core material is fed into an inner tank of a boiling tank to be subjected to powder soaking, and then powder homogenizing is conducted through an outer tank of the boiling tank; the core material obtained after powder uniformizing is fed into a feeding area to be heated and fused, then cooling is conducted, a fully-wrapped plastic dipping layer is formed on the core material, and C-shaped steel is obtained; wherein the plastic dipping layer at least comprises modified polyethylene or modified polyvinyl chloride. According to the C-shaped steel continuous plastic dipping production process, continuous production is achieved, efficiency is improved, the plastic dipping labor intensity is reduced, port full protection and corrosion prevention are achieved, the corrosion prevention effect of the C-shaped steel surface is improved, and the problem that a port is prone to rusting is solved.

The utility model provides an urban bicycle capable of reducing chain noise, which belongs to the technical field of bicycles and comprises a bicycle body unit, a bicycle frame, a seat cushion movably mounted at the top of the bicycle frame and a handlebar hinged to the top of the bicycle frame. And the protection unit comprises a closed chain cover fixedly mounted on the outer side of the frame. Rainwater and dust are effectively isolated through the closed chain cover, and friction abnormal sound generated when the chain operates is reduced; the oil storage box is matched with the lubricating cotton block, so that abrasion and corrosion of the chain are reduced through dynamic lubrication, and abnormal sound caused by insufficient long-term lubrication is avoided; the adjustable design of the bolt and the threaded seat ensures that the tensioning degree of the chain is stable, and mechanical noise generated by loosening is avoided; the detachable shell cover is convenient to clean and maintain, dirt accumulation is prevented from intensifying noise, the chain noise problem is radically solved from the four aspects of physical sound insulation, continuous lubrication, rust and corrosion prevention and mechanical stability, the riding comfort is remarkably improved, and interference to the urban sound environment is reduced.

The utility model relates to the field of automobile parts, and discloses a water-repellent engine heat insulation bottom protection plate which comprises a protection plate body, a protection assembly is installed on the top of the protection plate body, a sealing assembly is installed on the outer ring of the protection plate body, an overhaul groove and a limiting groove are formed in the middle of the protection plate body, and the protection assembly comprises a cover plate. The cover plate is installed in the limiting groove, three positioning bolts are connected to the positions, close to the two sides, of the top of the cover plate in a penetrating mode, a plurality of heat dissipation grooves are formed in the top of the cover plate in a penetrating mode, a protective cover is installed on the top of each heat dissipation groove, and a protective plate is fixedly installed on the top of the cover plate; the two sides and the rear portion of the protection plate are each provided with a set of grating grooves. Through a cover plate and a protection plate, internal rapid maintenance and observation are facilitated, and internal heat dissipation is improved while muddy water entering is reduced; and through the sealing strip and the fixing sleeve, sealing in the protection plate body is improved, and corrosion of muddy water to bolts is reduced.

This utility model discloses a double-ended screw for fixing electrical equipment, including a rod body with a smooth rod section in the middle and threaded sections at both ends. A through hole is provided on the rod body, axially connecting to the end of the rod body. A protective cap is fitted onto the threaded section, the protective cap including a cap tube and a threaded ring. A corrugated tube is provided between the cap tube and the threaded ring, and the cap tube and the threaded ring have internal threads that engage with the threaded section. This utility model's double-ended screw, by opening resin injection holes within the rod body, can fill the installation gap of the double-ended screw, eliminating internal voids and cavities, and preventing loosening and disengagement due to vibration transmitted during the use of electrical equipment. Furthermore, the protective cap protects the exposed threaded section of the double-ended screw during installation, preventing it from being exposed to air, reducing corrosion, and extending its service life.