279results about How to "Prevent tripping" patented technology

The invention relates to a power transmission line nest hazard grade identification method and device and computer equipment. The method comprises the following steps: acquiring a target power transmission inspection image, wherein the target power transmission inspection image comprises a bird nest and an insulator; detecting a bird nest and an insulator in the target power transmission inspection image to obtain a target detection result; performing instance segmentation on the target power transmission inspection image to obtain a first segmented region image including a bird nest and a second segmented region image including an insulator; based on the target detection result, the first segmented region image and the second segmented region image, determining a spatial position relationship between the bird nest and the insulator; and determining a bird nest hazard level based on the spatial position relationship. By adopting the method, the accuracy of bird nest hazard grade identification can be improved.

A short circuit detection circuit before closing of a charging pile relay relates to the field of electric vehicle charging piles, driving voltage drives a light emitting diode of an isolation optocoupler to be lightened, so that a detection signal of an MCU of a charging pile is changed from a high level to a low level, and the MCU of the charging pile forbids the relay to be closed according to a low level signal of short circuit detection. And equipment tripping or equipment damage is avoided. When the load end of the relay is connected with the charger and the battery of the electric vehicle, the resistance of the load end is increased, so that the voltage of the input side of the isolation optocoupler 6 is reduced, the light emitting diode in the driver cannot be lightened, and the detection signal of the MCU is always kept at a high level. Before the relay of the charging pile is closed, whether the output end of the relay is short-circuited can be detected, so that short-circuit faults are avoided, the maintenance cost is reduced, the service life of equipment is prolonged, and major fire disasters are avoided.

The utility model discloses an electric power material storage frame, and relates to the technical field of electric power material storage. The electric power material storage frame comprises a storage frame body, a first fixing plate and a second fixing plate are fixedly connected to the front surface of the storage frame body, and triangular plates are fixedly connected to the surfaces, away from the storage frame body, of the first fixing plate and the second fixing plate. By arranging the display board capable of sliding up and down, when goods need to be loaded and unloaded on the goods shelf on the upper layer of the storage rack main body, a worker can be lifted, so that the goods can be conveniently placed or taken, the worker does not need to climb a ladder or use other tools, potential safety hazards caused by slipping or falling of the goods are reduced, and the working efficiency is improved. By means of the structure that the display board can slide front and back, when the storage rack is not used, the display board can slide to the bottom of the storage rack body by sliding the display board, passing people can be prevented from being stumbled, safety is improved, and practicability is enhanced.

The invention provides a ventilation and dehumidification device for a 35kV box-type transformer, and relates to the technical field of power transformers, the ventilation and dehumidification device comprises a box-type transformer substation box body, the bottom of the box-type transformer substation box body is installed at the top of a box-type transformer substation base body, through holes are formed in two opposite side walls of the box-type transformer substation base body, an air inlet pipe and an air outlet pipe are correspondingly arranged in the through holes respectively, and the air inlet pipe and the air outlet pipe are communicated with the box-type transformer substation base body. And the air inlet pipe and the air outlet pipe are respectively connected with a ventilation mechanism. The air inlet pipe and the air outlet pipe are embedded in the two side walls of the box transformer substation base body, and the ventilation mechanisms are connected to the air inlet of the air inlet pipe and the air outlet of the air outlet pipe respectively, so that the interior of the box transformer substation base body can be ventilated, it is guaranteed that the cable well in the box transformer substation base body is always in a dry, ventilated and ponding-free state, and the service life of the cable well is prolonged. Insulativity reduction caused by long-time soaking of the cable due to water accumulation in the box-type transformer substation base body is effectively avoided, and the fault rate of the box-type transformer substation cable is reduced at the same time.

The utility model discloses a grounding device for electric power engineering, relates to the technical field of electric power engineering, and solves the problems that an electric conductor is not easy to smash into soil when the grounding device faces the ground with hard soil texture, and the installation is relatively inconvenient, the grounding device comprises a bottom plate, the top of the bottom plate is in threaded connection with a drill rod, and the top of the drill rod is fixedly connected with a turntable; according to the utility model, through the arrangement of the bottom plate, the grounding device can be supported, through the arrangement of the rotating disc and the drill rod, the conductive rod and the conductive block can be drilled into the soil, and the grounding device can be used for grounding. And by arranging a rotating handle, a threaded rod and a threaded sleeve, the conductive rod and the conductive block can be driven to move downwards again, the conductive rod and the conductive block are made to penetrate into the soil and make close contact with the soil, time and labor are saved during installation, meanwhile, the stability after installation is high, and the device can be suitable for the grounds with different hardness.

The utility model relates to the technical field of sewage treatment equipment, and discloses multistage AO process sewage treatment equipment which comprises a shell, an anaerobic zone, an anoxic zone and an aerobic zone are arranged in the shell, the outer wall of the aerobic zone is fixedly connected with an air pump, the output end of the air pump is fixedly connected with an air inlet pipe, and the output end of the air inlet pipe is fixedly connected with an air outlet pipe. The inner wall of the aerobic zone is fixedly connected with a fixing mechanism for fixing the air inlet pipe, the inner wall of the aerobic zone is fixedly connected with a rotating assembly, the rotating assembly is fixedly connected with an aeration disc, and a connecting assembly is arranged between the air inlet pipe and the aeration disc. According to the multi-stage AO process sewage treatment equipment, two groups of aeration discs are arranged, after one group is damaged, the other group can continue to work, normal aeration work of an aerobic zone can be ensured, meanwhile, when the multi-stage AO process sewage treatment equipment is cleaned, the aeration discs can be lifted up, workers are prevented from being stumbled by a pipe network of the aeration discs, and the working efficiency is improved. The possibility that the aeration head is trampled is avoided, and the operation is simple and convenient.

The invention discloses a preparation method of a regenerated colored polyester fiber, the regenerated colored polyester comprises regenerated polyester and pigment, the preparation method comprises the following steps: melting the regenerated colored polyester to obtain a regenerated colored polyester melt, the regenerated colored polyester fiber is prepared from the regenerated colored polyester melt through metering, spinneret plate extrusion, cooling, oiling, stretching, heat setting and winding, and an oil agent adopted in the oiling step at least comprises mineral oil and iso-tridecanol polyoxyethylene ether. According to the invention, the static friction coefficient mu s and the dynamic friction coefficient mu d are adjusted through the oil agent to obtain the cohesive force suitable for the fiber, so that the wear resistance of the fiber is improved, broken filaments generated by breakage of the fiber in the spinning process are reduced, and the machinability of the fiber is improved.

The invention, which relates to the field of power system monitoring and management, provides a power line installation potential safety hazard integrated device comprising a data acquisition unit, a signal processing unit, a data analysis unit, a positioning early warning unit, a data learning module and a big data unit. The data acquisition unit comprises a double-end traveling wave sensor module for acquiring traveling wave signals at the two ends of the power line in real time; by means of the design, a fault tower can be rapidly and accurately positioned, line operation and maintenance personnel can be guided to rapidly find a fault point, rapid and accurate fault positioning is achieved, the problem that the detection effect is low by means of manual inspection or using a simple instrument is solved, real-time monitoring, analysis and positioning can be conducted, the operation and maintenance personnel can be timely notified to go to the site for troubleshooting, and the working efficiency is improved. According to the method, line fault tripping is avoided, fault traveling waves collected each time can be compared with a big data expert database for analysis, and operation and maintenance personnel go to the site to handle faults, continuously learn and improve and adapt to continuously changing environmental conditions.

The utility model provides a rotary adsorption type mirror structure which comprises a shell, a lens and an adsorption assembly, the lens and the adsorption assembly are oppositely connected to the shell, the bottom wall of the shell protrudes towards one side to form an installation base, the top wall of the installation base is concavely provided with an installation groove, the side wall of the installation base is provided with an installation opening, and the installation opening is communicated with the installation groove. A guide slope obliquely extends from one end to the other end of the edge of the mounting opening, and a clamping groove is formed in the top end of the guide slope; the lens is buckled and fixed on the mounting groove through a fixing sheet; the adsorption assembly comprises a sealing membrane and a base piece which are fixedly connected, the sealing membrane can cover the outer side of the shell, the base piece is rotationally connected into the installation base, a spring is connected between the base piece and the installation base, and the base piece is provided with a clamping block corresponding to the installation opening in a protruding mode. And the clamping block can move along the guide slope to be buckled and fixed with the clamping groove. The mirror structure is convenient to mount and operate and smooth to use, and has a good damping effect and a firm connecting structure.

The utility model discloses an asphalt pavement anti-sliding low-noise structure which comprises a rock layer, a supporting pile is fixedly poured in the rock layer, a concrete layer is fixedly poured at the upper end of the supporting pile, and an anti-sliding groove is formed in the upper end of the concrete layer. The installation opening is formed in the asphalt pavement, rainwater can be conveniently and rapidly discharged downwards along the drainage pipe, garbage impurities can be filtered through the design of the filter screen and prevented from entering the drainage pipe, the flatness of the asphalt pavement can be guaranteed through the design of the supporting block, and passersby are prevented from being stumbled by the installation opening; the arc-shaped pavement is arranged at the upper end of the asphalt pavement, rainwater can be conveniently drained to the two sides, rainwater accumulation is prevented from influencing driving, the design of the drainage ports can assist in drainage and improve the drainage efficiency, and the design of the steel bar frame and the square frame can reinforce the concrete layer and the asphalt pavement structure and improve the integrity of the road.

The utility model belongs to the technical field of municipal road drainage equipment, and particularly relates to a municipal bridge road drainage channel anti-blocking peripheral which comprises a road and a drainage pipe arranged below the road, and further comprises an anti-blocking assembly arranged on the surface of the drainage pipe, and the anti-blocking assembly comprises a water inlet pipe fixedly connected to the surface of the drainage pipe. The water inlet pipe is communicated with the drainage pipe, a fixing ring is fixedly connected to the surface of the inner side of the water inlet pipe, a water outlet pipe is fixedly connected to the surface of the inner side of the fixing ring, six stand columns are fixedly connected to the surface of the upper end of the water inlet pipe, and a second filter screen is fixedly connected between every two adjacent stand columns; a cover plate is fixedly connected to the end, away from the water inlet pipe, of the stand column, and a guide sleeve is fixedly connected to the center of the bottom face of the cover plate. The drainage channel can be prevented from being blocked, and meanwhile peculiar smells generated by waste water can be prevented from floating to the road surface.

A cable channel environment automatic adjusting device disclosed by the present invention comprises a monitoring module, a communication module, a CPU processor, a power supply module and a control module, an output end of the monitoring module is connected with the CPU processor, a power supply port of the CPU processor is connected with the power supply module, the CPU processor is further electrically connected with the communication module and the control module, and the communication module is wirelessly connected to a mobile equipment terminal. The monitoring module collects water level, temperature, humidity and video environment information of accumulated water of the cable channel and transmits the environment information to the CPU processor, and the control module is started through the CPU processor to automatically adjust the environment of the cable channel. The cable can reliably operate in a normal-temperature and dry environment, the service life of the cable is effectively prolonged, the power failure time is shortened, and the power supply reliability is improved.

The utility model relates to a relative motion support steel structure with a plane rotation function, which comprises a shank frame, and the shank frame is provided with an overturning frame and a rotation driving assembly for driving the overturning frame to rotate towards one side. The guide piece slides on the shank frame in a guiding mode in the transverse direction, the pull rod is arranged on the shank frame in a swinging mode, the pull rod driving piece drives the pull rod to swing, one end of the pull rod is in linkage with the pull rod driving piece, the other end of the pull rod is hinged to the overturning frame, and the overturning frame is connected to the guide piece and can rotate relative to the shank frame. The space on one side of the shank frame can be released in a sideslip rotating mode, the problem that the space is narrow is solved, and a user can stand more conveniently.

This invention provides a portable air conditioner integrating drying and preservation, relating to the field of air conditioning technology, and designed to solve the problem of low energy utilization in portable air conditioners. The portable air conditioner includes a housing, within which are a first heat exchange chamber, a second heat exchange chamber, and a storage chamber. The housing has a first air inlet, a second air inlet, and an air outlet. Both the first air inlet and the air outlet are connected to the first heat exchange chamber, which houses a first heat exchanger and a first fan. The second air inlet is connected to the second heat exchange chamber, which is also connected to the storage chamber via the air outlet. The second heat exchange chamber is isolated from the first heat exchange chamber and houses a second heat exchanger and a second fan. The storage chamber also has an exhaust port configured to connect to an exhaust pipe. This invention can fully utilize waste heat or waste cold energy generated during the cooling or heating process of a space, thereby achieving efficient resource utilization and reducing energy consumption.

The invention is applicable to the technical field of building construction, and provides a pavement grouting pouring lifting device for building construction, which comprises a bottom plate, a through groove is formed in the upper surface of the bottom plate, a lifting plate is slidably connected in the through groove, a collecting box is fixedly connected to the lower surface of the lifting plate, and a collecting cavity is formed in the collecting box. The interior of the collecting cavity is slidably connected with a cleaning hopper, and the right end of the cleaning hopper slidably extends out of the interior of the collecting box, so that the functionality of the device is improved, a worker can conveniently conduct leveling work after grouting and pouring on a road surface, the worker does not need to conduct leveling independently, the working steps of the worker are reduced, and the working efficiency is improved. According to the pavement grouting and pouring device for building construction, the working intensity of workers is reduced, meanwhile, redundant mortar is collected as much as possible, the working intensity of the workers during subsequent redundant mortar cleaning is reduced, and the problem that some existing pavement grouting and pouring devices for building construction are inconvenient to level and collect mortar is solved.

The invention discloses a relay control method based on temperature induction. The relay control method comprises the following steps: acquiring electrical equipment protected by a relay to obtain a current current value; obtaining a current-time limit mapping relation; determining an initial countdown time limit corresponding to the current current value based on the current current value and a current-time limit mapping relation; acquiring the current working temperature of the relay to obtain a current temperature value; calculating a final countdown time limit based on the current temperature value and the initial countdown limit; and controlling the relay to trip based on the final countdown time limit. Therefore, the inverse time limit characteristic and the temperature protection are organically combined, more accurate, reasonable and efficient overcurrent protection can be carried out, and the adaptability of the system to a complex operation environment is enhanced.

The utility model discloses an anti-torsion invisible puller and a zipper, and belongs to the technical field of zippers, the invisible puller comprises a puller main body and a self-locking plate; a connecting seat is arranged on the puller main body, and the self-locking plate is hinged to the connecting seat; the connecting seat is provided with two heightening stop blocks at the pull-stop hole, and the outer ends of the two heightening stop blocks are mutually connected into a whole to form a guide part; two wall baffles are arranged at the connecting position of the connecting base and the self-locking piece, and the inner sides of the two wall baffles protrude oppositely to form two thickened bosses. And the two heightened stop blocks and the two thickened bosses are used for restraining the front end and the rear end of the self-locking plate respectively. The two heightened stop blocks and the two thickened bosses are arranged on the puller body and used for restraining the front end and the rear end of the self-locking piece respectively, so that it is guaranteed that when the self-locking piece is subjected to twisting force, the puller body cannot deform due to twisting force, and the pull ring and the invisible puller are firmly and reliably connected; and the puller and the zipper finished product can pass the torsion detection of the children's wear zipper at a higher level.

The utility model discloses a VIN marking machine working frame which comprises a base, a stand column is fixed to the upper end of the base, a transverse pipe is fixed to the upper end of the stand column, the two ends of the transverse pipe are each rotationally connected with a chain wheel, a chain is arranged in the transverse pipe, and the chain is matched with the two chain wheels at the same time. The length of the chain is larger than the distance between the two chain wheels, and the parts, exceeding the chain wheels, of the two ends of the chain naturally fall downwards. One end of the chain is detachably connected with a VIN marking machine, and the other end of the chain is detachably connected with a spring balancer and detachably connected with a steel cable of the spring balancer. According to the utility model, the height and angle of the VIN coding machine can be conveniently adjusted, the transfer is convenient, the coding task can be accurately and quickly completed, and the coding efficiency and quality are improved.

The utility model relates to a take-up track transfer type pile line split air mobile charging robot system, which comprises an air track, a walking module, a movable charger, a winding gun line module, a charger side butt joint module, a winding side butt joint module, a power taking module, a charging call response system and a control processing unit, the movable charger can move along the aerial track and change the track and steer under the driving of the walking module, a winding gun line module is arranged beside each parking space, the movable charger can achieve the purpose that any parking space can be in electrical butt joint with the winding gun line module, and therefore the charging service can be provided for an electric automobile below the movable charger. The utility model relates to the field of new energy vehicle charging, eliminates the one-to-one binding relationship between a movable charger and a charging gun line, greatly improves the utilization rate of charging resources, supports reservation charging and queuing charging, can take back the charging gun line after a user pulls out a gun, and is more convenient, more efficient, cleaner and safer.

The present invention discloses a convenient post-forming concrete pavement maintenance device, which relates to the technical field of pavement maintenance, and includes a trailer, wherein the trailer is fixedly connected with a handle, a side of the trailer close to the handle is fixedly connected with a high-pressure water tank, the high-pressure water tank is connected with a first hose, and a side of the trailer away from the handle is fixedly connected with a bracket, the bracket is fixedly connected with a joint box, and the first hose is connected with the joint box. The present invention uses hydraulic action to make each nozzle of the telescopic nozzle assembly automatically extend outward step by step when spraying the maintenance solution, so that the maintenance solution is evenly sprinkled on the concrete pavement over a large range, and through the elastic force of the first spring, when the spraying of the maintenance solution stops, each nozzle of the telescopic nozzle assembly automatically retracts inward step by step, so as to avoid occupying a large amount of storage space during operation and non-operation periods, and avoid tripping operators and hindering the operation of other mechanical equipment.

The utility model discloses a concrete reinforcement detection device for construction project quality detection, and relates to the technical field of concrete reinforcements, the concrete reinforcement detection device comprises a box body, the left side of the box body is movably connected with a box door through a hinge, the box body is internally provided with a buffer mechanism, and the left side of the buffer mechanism is detachably provided with a detection equipment body; a locking lifting mechanism is arranged at the top of the box body, and a bearing mechanism is arranged at the top of the inner side of the box body; the locking lifting mechanism comprises an inverted-U-shaped handle, an outer sleeve plate and a reset spring. The inverted-U-shaped handle is arranged at the top of the box body in a sliding and penetrating mode. The portable concrete reinforcement detection device can be carried on the back to move and can also be lifted to move at the same time, in addition, the carrying mechanism can be automatically triggered and stored in the lifting process, a user can be prevented from being stumbled while the floor is prevented from being dirtied, the portable concrete reinforcement detection device is more convenient to use in actual use, and normal proceeding of the concrete reinforcement detection process is guaranteed.

The invention relates to a debugging method and device for a magnetic valve type controllable shunt reactor, and belongs to the technical field of power systems. According to the method, the trigger pulse frequency during normal operation of the magnetic valve type controllable shunt reactor is adjusted, and the number of trigger pulses is reduced under the condition that the trigger angle of the thyristor is not changed, so that the trigger pulses subjected to frequency reduction can reduce the magnitude of direct-current exciting current in the magnetic valve type controllable shunt reactor, and the frequency of the direct-current exciting current in the magnetic valve type controllable shunt reactor is reduced. And the change trend of the magnitude of the three-phase current can be accurately reflected. According to the method, the trigger pulse in normal operation is subjected to frequency division processing, so that the problem that the phase of the reactor is incorrect when the reactor is electrified and debugged for the first time can be effectively solved, tripping or damage of the reactor caused by the phase can be avoided, field installation and debugging personnel are helped to carry out troubleshooting, and the debugging efficiency of the magnetic valve type controllable shunt reactor complete equipment is improved.

The invention relates to a movable mouse blocking device. The movable mouse blocking device comprises a mouse blocking plate and a connecting mechanism, the mouse blocking plate is used for being movably arranged at the bottom of a door opening of a door frame, the mouse blocking plate covers the bottom of the door opening of the door frame when in a closed state, and the mouse blocking plate opens the bottom of the door opening of the door frame when in an open state. The connecting mechanism comprises a fixed hinge, a movable hinge and a springback shaft, the side edge of the movable hinge and the side edge of the fixed hinge are movably connected to the springback shaft, the fixed hinge is connected to one side of the door frame through a first fastener, and the movable hinge is connected with one side of the mouse blocking plate through a second fastener; the springback shaft is used for automatically rotating to a closed state after the mouse blocking plate and the movable hinge are opened. The movable mouse blocking device has the advantages of being high in safety and high in use convenience.

The present application discloses a steam turbine emergency shutoff test device and an emergency shutoff test method, the device comprising a diaphragm valve connected to the oil outlet of the main oil pump of the steam turbine, an emergency shutoff pipeline and two oil injection branches; the emergency shutoff pipeline comprises a reset solenoid valve, two emergency shutoff branches corresponding to the two oil injection branches respectively, and an oil filling pipeline; the oil filling pipeline is connected between the two emergency shutoff branches; an oil filling valve is arranged in the oil filling pipeline, and an oil pressure monitoring device is arranged in each of the two emergency shutoff branches. The present application connects the oil filling pipeline between the two emergency shutoff branches, and after the oil injection test of one of the emergency shutoff branches is completed, the oil filling valve is first opened to allow the oil of the other emergency shutoff branch to be filled with oil, and then the emergency shutoff branch is connected to prevent the unit from tripping due to an instantaneous drop in oil pressure at the moment of connection.

The utility model discloses a security room alarm device, and mainly relates to security room alarm. Comprising an alarm device body, one side of the alarm device body is fixedly connected with a connecting wire, one end of the alarm device body is provided with an adjusting device, the adjusting device comprises an assembling block, the assembling block is fixedly connected with the alarm device body, and sliding blocks slidably penetrate through the two ends of the inner wall of the assembling block; and the sides, close to each other, of the two sliding blocks are fixedly connected with the same spring, the arc surfaces of the two sliding blocks are slidably connected with the same connecting plate, the two sides of the connecting plate are fixedly connected with fixing blocks, and threaded rods penetrate through the inner walls of the fixing blocks in a threaded mode. The beneficial effects of the utility model are that after the alarm device is installed on the wall body, when the alarm device breaks down and needs to be detached for maintenance, the alarm device can be rapidly detached through the adjusting device, so that the speed of maintenance of the alarm device is improved.

This application relates to the field of automotive mold manufacturing technology, and in particular to a mold cleaning device, including a housing, a protective mechanism, a drive mechanism, and a cleaning gun placement mechanism. The housing consists of a base, an outer cover fixedly mounted on the upper surface of the base, and a front opening on the front of the outer cover and a top opening on the top of the outer cover. The protective mechanism consists of a front protective component located at the front opening and a top protective component located at the top opening. The front protective component includes a groove on the inner wall of the outer cover, and a left protective door and a right protective door that slide and engage with the inner wall of the groove via rollers. The mold cleaning device described in this application employs a linkage design between the left and right protective doors and a foldable top plate, synchronously controlled by the drive mechanism, to automatically open and close the openings during mold loading and unloading, effectively isolating high-pressure fluid splashing and diffusion.

The utility model relates to the field of manned conveying device industry, in particular to a moving sidewalk. The technical problems that a conventional moving sidewalk is not convenient enough to overhaul and maintain, and pedestrians are prone to slipping on the sidewalk due to rainwater or silt on shoe soles are solved. According to the technical scheme, the moving sidewalk comprises a sidewalk assembly, a handrail assembly, a pedal assembly and a cleaning assembly. Through the arrangement of the access hole formed in the side face of the moving sidewalk and the pedal assembly easy to disassemble and assemble, the sidewalk can be rapidly overhauled and maintained, through the arrangement of the cleaning assembly and the dual cleaning of the ground mat and the drying machine, rainwater, silt and the like attached to the soles of pedestrians can be thoroughly cleaned, and the service life of the moving sidewalk is prolonged. And the anti-skid rubber blocks are arranged on the pedal assemblies, so that pedestrians are prevented from being injured due to slipping and falling down when climbing on the moving sidewalk, and the problems are solved.

The application relates to the technical field of equipment installation, and particularly discloses a pit edge mounting base and a construction method, which comprises a pre-buried plate, the pre-buried plate is installed on the bottom of the inner wall of a pouring groove arranged at the edge of a pit body, a supporting piece is fixedly installed on the pre-buried plate, a guard angle steel is installed on the top of the supporting piece, the top of the guard angle steel is flush with the top of the pouring groove, an angle steel supporting lug is fixedly connected to the side of the guard angle steel close to the pit, a gap is formed between the upper surface of the angle steel supporting lug and the upper surface of the guard angle steel, and the gap is used for mounting a pit cover plate; the pre-buried plate is used for connecting the structure of the pit foundation, the top of the pre-buried plate is provided with a civil engineering formwork during the civil engineering process, so that the pre-buried plate can be effectively leveled through the civil engineering formwork; and the pre-buried plate is arranged in a plane, after pouring the foundation, no protrusion is formed, and compared with the inclined steel bar used as the pre-buried piece, the safety hidden danger of tripping the installation personnel is eliminated.

The utility model discloses a quick shackle structure which comprises a female buckle, the female buckle comprises an upper fixing base and a lower fixing base which are connected with each other, a buckling hole facing the lower fixing base is formed in the top of the upper fixing base, and an inserting opening penetrating through the buckling hole is defined by the side portion of the upper fixing base and the side portion of the lower fixing base. The male buckle comprises a top cover, the top cover extends to be provided with an insertion piece capable of being inserted into the insertion opening, the insertion piece is provided with a movable elastic piece, the elastic piece is provided with an elastic pressing piece, and when the male buckle is connected with the female buckle in a buckled mode, the end of the elastic piece clamps the buckling hole, and the pressing piece is pressed downwards to abut against the lower fixing base. The device is ingenious in structural design, double insurance can be achieved during use, tripping can be prevented, the elastic piece is obliquely and upwards jacked up, collapse tripping is prevented, the pressing piece downwards presses the female buckle to achieve elastic limiting, and half tripping caused by the fact that the elastic piece ascends due to the fact that the male buckle bears too large tensile force is prevented.

The invention relates to the field of rack welding, in particular to smokeless welding equipment for rack manufacturing, which comprises a welding chamber, a collecting bin and the like, a collecting bin is arranged on the lower side of the welding chamber. A flowing cavity is formed between the welding chamber and the isolation frame, meanwhile, the first exhaust pipe generates suction force, then flowing airflow is made to be far away from a welding area, the flowing airflow is prevented from taking away protective gas, and the quality of the welding position of the rack is improved; the guide plate and the first exhaust pipe are matched to guide gas to form a cyclone, and then the gas enters the first exhaust pipe in a gas rotating mode during suction of the first exhaust pipe, so that the gas suction capacity of the first exhaust pipe is improved, and meanwhile protective gas is prevented from being sucked away; flue gas cannot accumulate and stay on the surface of the illuminating lamp through the rectangular holes, a light source of the illuminating lamp is guaranteed, the flue gas is prevented from interfering with welding work of workers, and meanwhile the service cycle of equipment is prolonged.