45results about How to "Avoid setting" patented technology

The utility model relates to an electrocardio watch which comprises a bottom shell, a middle frame and a transparent watch cover, the bottom shell and the watch cover are arranged at the bottom end and the top end of the middle frame respectively, a control circuit board is arranged in the middle frame, a first electrode electrically connected with the control circuit board is arranged on the bottom face of the bottom shell, a second electrode is arranged on the upper surface of the watch cover, and the first electrode is electrically connected with the control circuit board. The second electrode comprises an upper electrode part located on the upper surface of the meter cover, a lower electrode part located in the middle frame and a connecting part, the two ends of the connecting part are connected with the upper electrode part and the lower electrode part respectively, and the lower electrode part is electrically connected with the control circuit board. According to the electrocardio watch, a structure used for installing the second electrode does not need to be independently arranged on the middle frame, the occupied space of the second electrode is reduced, the watch can be designed to be thinner, meanwhile, holes or protruding electrodes are prevented from being arranged on the middle frame, and the appearance integrity of the electrocardio watch is maintained.

The utility model discloses a multicore wire stranding machine, including frame, swivel support, rotation axis, drive mechanism and at least two constant tension pay -off device, constant tension pay -off device sets up in swivel support and gives out core wire, drive mechanism drives rotation axis and swivel support rotation, constant tension pay -off device includes frame and sets up in the pay -off reel of frame, pay -off servo motor, gyro wheel, flexible connecting piece, rotation servo motor, tension take -up wheel, displacement detection subassembly and servo controller, and the output of pay -off servo motor is connected with the pivot of pay -off reel, and gyro wheel is linearly movably arranged in the frame, the output shaft of rotation servo motor is connected with tension take -up wheel, and displacement detection subassembly detects the rotation angle of the output shaft of rotation servo motor or detects the displacement of gyro wheel. The utility model can automatically control the tension of the core wire pay -off of stranding machine, makes the tension and line speed of cable keep constant, realizes digitization and intelligent production, effectively improves production efficiency and the quality of cable.

The application relates to an overcurrent-preventing resistor, which comprises a shell and a resistance coil, the bottom of the shell is internally provided with a bobbin and externally provided with a first pin and a second pin, the resistance coil is electrically connected to the first pin and the second pin, the resistance coil is sleeved on the bobbin and electrically insulated from the bobbin, the bobbin is internally provided with a magnetic piece, the magnetic piece is in sliding connection with the bobbin, the magnetic poles of the magnetic piece are distributed along the axis of the bobbin, the magnetic piece is electrically connected with the bobbin, the top of the inside of the shell is provided with an electric contact opposite to the bobbin, the top of the outside of the shell is provided with an indicating lamp electrically connected with the electric contact, and the inside of the shell is provided with a wire for electrically connecting the second pin. The application has the functions of quickly determining overcurrent in a laboratory and giving a warning.

The utility model discloses a kind of coal-fired unit furnace inner lifting platforms, including girder, reinforcing beam, side beam, vice beam, folding beam, protector, main hoisting device, hinge, pressing plate, cable-stayed point, cable-stayed upright, railing seat, guide wheel and square pressing plate.Girder and vice beam cross connection form load-bearing frame, reinforcing beam is set below girder to improve rigidity, side beam is surrounded in the periphery of frame.Folding beam is connected with girder or side beam by hinge, fixed by pressing plate and square pressing plate when unfolding, folded around hinge when folding.Main hoisting device cooperates with steel wire rope, steel wire rope is connected with winch through guide wheel, realize platform lifting;Cable-stayed upright and cable-stayed point form triangular support structure, for offsetting horizontal thrust.Protector is used to prevent overload or falling accident, railing seat is used to install safety protection component.The utility model platform structure is stable, safe and reliable, can cover boiler furnace dividing screen and screen superheater area, improve maintenance efficiency and reduce cost.

The application discloses infrared FPA-on-MEMS technology, belongs to the field of optical imaging and micro-electro-mechanical system integration technology, is used for manufacturing of infrared FPA-on-MEMS chip, utilizes the design of electrothermal-electrostatic dual driving module manufacturing process and the integration of infrared FPA unit on the middle platform of electrothermal-electrostatic dual driving module, can realize the coupling design of infrared FPA unit and MEMS driving technology on the chip level, and obtains infrared FPA-on-MEMS chip with automatic displacement control capability.The infrared FPA-on-MEMS technology of the application can effectively overcome the problems of large volume, slow speed, high power consumption and complex system caused by the fact that the traditional infrared imaging system relies on external optical mechanical components to realize functions such as anti-shake, scanning and zooming, improves the integration and reliability of the infrared thermal imaging system, breaks through the application bottleneck of the infrared thermal imaging technology, greatly improves the system integration and comprehensive use performance of the infrared thermal imaging system, and has excellent application prospect.

This utility model discloses a cooler for a battery pack, a battery pack, and an electrical device. The cooler for the battery pack includes a housing with a first dimension L and a second dimension W. The first and second directions are perpendicular, and L and W satisfy the following relationships: 10mm ≤ L ≤ 50mm and 10mm ≤ W ≤ 50mm, respectively. Therefore, the cooler can be flexibly arranged at the location on the battery pack requiring cooling, thus avoiding the need to place the cooler in a fixed position on the top of the battery pack or the side of the battery cells.

The utility model belongs to the technical field of environmental protection equipment, and particularly relates to an integrated multi-medium filtering type rainwater recycling device which comprises an installation cabinet, a multi-medium filter and a dosing assembly which are connected through a pipeline are arranged in the installation cabinet, and the multi-medium filter is provided with a water inlet pipe and a water outlet pipe. The dosing assembly comprises a clarifying agent tank and a long-acting disinfectant tank, the clarifying agent tank is connected with the water inlet pipe through a pipeline, and the long-acting disinfectant tank is connected with the water outlet pipe through a pipeline. According to the present invention, the filtration effect is improved, the floor area is reduced, the adopted clarifying agent is added in front of the filter, the clarifying agent enables the impurities in the rainwater to form the aggregated large flocs before entering the filter so as to improve the filtration effect, the long-acting disinfectant is added after the water passes through the filter, and the long-acting disinfectant adopts the chlorine preparation so as to achieve the long disinfection effect lasting time.

The utility model relates to the technical field of aluminum alloy sections, in particular to a high-strength aluminum alloy section for a combined energy-saving curtain wall, which comprises a stand column, a plurality of rib columns distributed at equal intervals are arranged on the inner side of the stand column, and ribs are arranged on the periphery of each rib column. The cross beams are located on the front side and the rear side of the stand column, fixing cylinders are arranged on the inner sides of the cross beams, and reinforcing fins are fixedly connected between the peripheries of the outer surfaces of the fixing cylinders and the inner walls of the cross beams. Under the action of the rib columns, the ribs and the honeycomb fiber braid layer, the aluminum alloy profile has the advantages of high strength and large bearing load, and the problem that the aluminum alloy profile for the combined energy-saving curtain wall possibly has insufficient strength in certain specific application scenes is solved; in particular, in a large-span, high-wind-pressure or complex-modeling curtain wall system, most traditional aluminum alloy sections are designed into single cavities, and deformation is prone to occurring when large loads are borne.

The application discloses a kind of industrial equipment's health degree analysis method without weight, belong to electric digital data processing technical field, comprising: in healthy state, according to the data index type for analyzing health degree, respectively collect at least one historical time window of industrial equipment industrial time series data, as reference data, collect the industrial time series data in current time window, as comparison data;According to reference data and comparison data, one by one through kernel density estimation, obtain probability density curve, to obtain probability distribution;According to data index type, the probability distribution of comparison data and the probability distribution of at least one reference data corresponding, obtain the JS divergence value for measuring data distribution similarity under data index type, to obtain the health degree of industrial equipment according to multiple JS divergence values.The application is based on kernel density estimation and JS divergence, quantifies distribution difference, without weight setting, improves health degree evaluation sensitivity and consistency.

The application provides a braiding device and a braiding method for manufacturing a double-head closed-loop dense net support. The braiding device comprises a rotating disc, a spindle assembly with a plurality of spindles, the spindle assembly being mounted on the rotating disc, the plurality of spindles being arranged in sequence along the circumference of the rotating disc, every two spindles being symmetrical about the center of the rotating disc, and any two symmetrical spindles being used for sleeving a braiding ring so that the centers of all the braiding rings intersect at the center of the rotating disc; and a braiding core rod coaxially arranged with the rotating disc, the braiding core rod being movable in the axial direction of the rotating disc, the braiding core rod penetrating the center intersection area of the braiding ring and making the center intersection area located at a braiding starting point of the braiding core rod, and the braiding core rod tensioning all the braiding rings at the braiding starting point. The braiding device can braiding the double-head closed-loop dense net support on the braiding core rod at one time through the movement of all the spindles along the circumference of the rotating disc and the movement of the braiding core rod along the axial direction of the rotating disc, thereby effectively reducing the manufacturing difficulty of the double-head closed-loop dense net support and improving the manufacturing yield.

This disclosure provides a plug-in pulse ignition device and a fully premixed burner assembly including the device. The plug-in pulse ignition device includes an igniter and a pulse generator. The igniter includes a mounting bracket, a first electrode and a second electrode extending downward from the mounting bracket, and a first conductive terminal extending upward from the mounting bracket. The pulse generator includes a housing, a pulse generating assembly disposed within the housing, and a second conductive terminal electrically connected to the pulse generating assembly. A receiving cavity is formed on one of the first and second conductive terminals, and the head of the other terminal is detachably inserted into and in contact with the receiving cavity. By arranging the conductive terminals of the igniter and the pulse generator in a plug-in configuration, they can be plugged together for assembly, thereby avoiding the need for a high-voltage wire between them, reducing safety hazards, and facilitating the internal component layout of the equipment.

This utility model relates to the field of sealing conduits, and particularly to a sealing device for conduits, comprising a gripping rod, a pressurizing component, a pressure line, and an injection mechanism for extending into the conduit port. The end of the gripping rod is detachably connected to a storage container for adhesive, and the injection mechanism is detachably connected to the outlet of the storage container for adhesive, with an injection port communicating with the outlet. The pressurizing component is connected to the pressure line, which is detachably connected to the storage container for adhesive. The operator uses the gripping rod to raise the storage container for adhesive to a designated position and inserts the injection mechanism into the conduit port. Pressure is transmitted through the pressure line to inject adhesive into the conduit port, achieving the purpose of sealing the conduit at a high location. When sealing conduit ports at high locations, scaffolding is avoided, reducing scaffolding costs and ensuring the safety of workers.

This invention provides an aerial assembly device for large-span steel beams. The device includes a support mechanism and two positioning mechanisms. The support mechanism is positioned between the factory columns where the steel beams are to be installed. The positioning mechanisms are symmetrically positioned at the top of the support mechanism along the axis of the steel beams and include paired positioning components. These positioning components can move perpendicular to the axis of the steel beams to position and adjust their axial position. This invention provides a support platform and working platform for the assembly and connection of the steel beams by setting up the support mechanism, avoiding the need for large-scale temporary work platforms and significantly saving construction time and costs. The positioning mechanisms enable convenient, efficient, and precise positioning of the steel beams. The self-unloading lifting device allows for the dismantling of the support mechanism, avoiding prolonged occupation of hoisting equipment, resulting in high construction efficiency and safety.

The utility model discloses a kind of circulating pet water dispensers, including water storage tank and support seat, pump body assembly is configured in support seat, first containing cavity is provided in support seat, the setting of pump body assembly part is in first containing cavity, water tray is provided in the top of first containing cavity, water outlet channel and water inlet channel are formed in support seat, the water outlet channel is communicated with water tray, drain outlet is provided in the bottom of first containing cavity, the sealing member that can be opened and closed is provided in drain outlet, the drain outlet is located above water storage tank. Through being provided with first containing cavity in support seat, while pump body assembly is set in first containing cavity, the problem that pump body assembly durability is caused by being set in water storage tank is avoided, while drain outlet is set in the middle of support seat, so that the dirt in its water tray can be discharged from water tray faster, so that the water in water tray can have better circulation efficiency.

The utility model relates to the technical field of building construction, in particular to a cast-in-place slab formwork assembly. The cast-in-place slab formwork assembly comprises a building bottom formwork; the supporting structure is arranged at the bottom of the building bottom formwork, the supporting structure is provided with first supporting pieces and second supporting pieces, the first supporting pieces are arranged in a cavity between an upper flange plate and a lower flange plate of the steel beam, the first supporting pieces are connected with the lower flange plate, and the two ends of each second supporting piece are fixedly connected with the two adjacent first supporting pieces correspondingly; the second supporting piece abuts against the building bottom formwork and is used for supporting the building bottom formwork. The first supporting piece is arranged in the cavity between the upper flange plate and the lower flange plate, the two ends of the second supporting piece are fixedly connected with the first supporting piece, and the second supporting piece supports the building bottom formwork, so that erecting of a full framing body can be avoided, the labor cost is reduced, the danger is reduced, and meanwhile, the construction efficiency is improved. And the full framing of the upper layer can be carried out without waiting for the concrete of the lower layer to reach the design strength.

The utility model belongs to the technical field of environmental protection equipment, and particularly relates to an integrated superfine micropore multilayer filtering type rainwater recycling device which comprises an installation cabinet, a superfine micropore multilayer filter and a chemical adding assembly which are connected through a pipeline are arranged in the installation cabinet, and the superfine micropore multilayer filter is provided with a water inlet pipe and a water outlet pipe. The ultrafine micropore multilayer filter comprises a machine body and a plurality of groups of filter elements, the dosing assembly comprises a clarifying agent tank and a long-acting disinfectant tank, the clarifying agent tank is connected with the water inlet pipe through a pipeline, and the long-acting disinfectant tank is connected with the water outlet pipe through a pipeline. According to the utility model, rainwater is treated through the ultrafine micropore multilayer filter, so that the arrangement of a split type filter is avoided, the occupied area is reduced, and meanwhile, a plurality of groups of filter elements are adopted, so that the requirement of large-flux filtration can be met, and the filtration precision of 150 microns can be realized at the same time.

This invention discloses a modular construction method for prefabricated utility tunnel structures, comprising the following steps: S1, prefabricating several segments of reinforced concrete integrated utility tunnel columns and beams; S2, excavating a foundation pit to construct a foundation platform, forming several spaced-apart sockets on the platform; S3, hoisting the integrated utility tunnel column and beam structure as a whole, positioning and fixing the bottom of the integrated structure into the sockets; S4, repeating step S3 to complete the installation of the next integrated utility tunnel column and beam structure; S5, pouring concrete at the joints between adjacent integrated utility tunnel columns and beams. This invention can further reduce construction costs, shorten the construction period, and ensure construction progress while maintaining construction efficiency and quality, and can effectively control problems such as construction waste, site dampness, and dust pollution during construction.

The utility model provides a writing whiteboard capable of being overturned and folded, which comprises a first whiteboard and a second whiteboard, the two whiteboards are hinged through a connecting piece, and relative rotation and sliding of the two whiteboards are realized by utilizing the matching of a sliding chute and a sliding block. The second whiteboard is provided with a sliding groove, the connecting piece is rotationally connected with the sliding block, the whiteboard splicing face is provided with first magnet sets which attract each other, the side away from the connecting piece is provided with a second magnet set, and rapid fixing is achieved. When the white board disclosed by the utility model is unfolded, a gap is extremely small, and when the white board is folded, the writing surface can be inwards protected. In addition, a U-shaped support and an angle adjusting assembly can be arranged on the back side of the whiteboard to provide additional supporting and functions, so that the whiteboard can be used as a three-dimensional support of the display board. The modular design allows the second whiteboard to be connected to the third whiteboard or more through a similar mechanism, and the use requirements of different scales and occasions are met.

The invention relates to the technical field of battery management, and discloses a battery management system, method and device, a medium and an unmanned aerial vehicle. The active equalization management circuit is electrically connected with the series battery pack and is used for collecting state information of the single batteries and executing bidirectional active equalization control on the series battery pack; the interface unit is used for establishing electric connection with external equipment; wherein the series battery pack and external equipment form a direct connection type main loop through the interface unit, and energy on-off control of the direct connection type main loop is realized through physical plugging of the interface unit. Energy on-off control is realized through physical plugging of the interface unit, an electronic power switch device is prevented from being arranged in a main loop, the design of the main loop is effectively simplified, and hardware complexity and control difficulty are reduced. And a direct connection type main loop is formed by the series battery pack and the external equipment, so that the number of intermediate devices in the main loop is reduced, the conduction loss is effectively reduced, and the energy transmission efficiency is improved.

The utility model belongs to the technical field of charging equipment, and provides a direct current charging pile capable of rapidly replacing a charging handle and a handle part. The direct-current charging pile comprises a charging handle and a direct-current charging pile body, the direct-current charging pile body comprises a first blocking body, the first blocking body divides the direct-current charging pile body into a charging gun wiring cavity and a mains supply access wiring cavity, the charging gun wiring cavity and the mains supply access wiring cavity are mutually independent, and the charging handle comprises a charging gun cable. The charging gun cable is detachably connected with the charging handle and the charging gun wiring cavity. The charging gun wiring cavity and the commercial power access wiring cavity are mutually independent, components in the commercial power access wiring cavity cannot be touched when the charging gun is replaced or the charging wiring cavity is operated, an independent wiring space is provided, and the high-voltage direct-current charging gun wiring cavity and the low-voltage alternating-current commercial power access wiring cavity are physically isolated. And the quality problem of other components caused by manual operation is avoided.

This utility model discloses a fire extinguishing device, including a fire extinguishing agent storage tank, a connecting valve, and a glass bulb temperature sensing unit. The fire extinguishing agent storage tank has a liquid storage chamber inside, storing fire extinguishing agent and pressurized gas. The fire extinguishing agent storage tank also has an outlet connecting to the liquid storage chamber. The connecting valve is detachably installed at the outlet and has an outlet channel. Multiple multi-hole nozzles are located on the side of the connecting valve, and these nozzles are connected to the outlet through the outlet channel. A movable sealing element is provided between the multi-hole nozzles and the outlet channel. The glass bulb temperature sensing unit is installed on top of the connecting valve and limits the sealing element to maintain its sealing state. When the ambient temperature exceeds the critical temperature of the glass bulb temperature sensing unit, the unit breaks, and the sealing element, driven by the pressurized gas, changes from a sealing state to a releasing state, allowing the multi-hole nozzles to connect to the outlet through the outlet channel. This utility model's technical solution can improve the reliability of the fire extinguishing device.

The application provides a joint pressure measuring device and a surgical robot system, the joint pressure measuring device comprising: a pressure measuring module and a gap adjusting module; the gap adjusting module comprising a first platform and a second platform oppositely arranged along the axial direction of the gap adjusting module, and the first platform is movable relative to the second platform along the axial direction of the gap adjusting module; the pressure measuring module is arranged on the side of the first platform away from the second platform and is used for abutting against a first object; the side of the second platform away from the first platform is used for abutting against a second object; the pressure measuring module is used for detecting the pressure data between the first object and the second object and outputting outwardly through the first platform. In this way, the accuracy of pressure measurement is effectively improved by avoiding the arrangement of intermediate components such as structural deformation or gaskets, and the balance of soft tissue is better, and the accuracy of prosthesis installation is improved.

The present application relates to the technical field of BMC, and discloses a setting method and device for a baseboard management controller page identification picture, which judges the type of an identification picture upload instruction, extracts target identification information if the identification picture upload instruction is an intelligent platform management interface command, searches for whether a target identification picture corresponding to the target identification information is stored in a first preset directory, acquires the target identification picture again when the target identification picture does not exist, renames the target identification picture as a first preset identification name, and stores the target identification picture in a second preset directory, so that the baseboard management controller page is refreshed, a preset page source code is run, and the target identification picture is displayed, thus realizing updating without restarting, reducing user waiting time and the number of restarts, avoiding security risks caused by frequent restarting of the baseboard management controller, and realizing efficient replacement of a baseboard management controller home page identification picture.

The application discloses a column-level latch module, an analog-to-digital converter and an image sensor, and belongs to the field of integrated circuit design. A first latch of a first stage, a second and third latch of a second stage and an output latch unit of a third stage are sequentially arranged. The first latch can sequentially latch four level quantization values, the second latch can latch a low conversion gain reset level quantization value from the first stage and timely transmit the low conversion gain reset level quantization value to the third stage, and the third latch can time-sharing transmit the other three level quantization values in the first latch to the third stage. Finally, the third stage can time-sharing output a high conversion gain reset level quantization value and a signal level quantization value and a low conversion gain reset level quantization value and a signal level quantization value. The column-level latch module can be constructed by a small number of latch combinations, the time-sharing output of a pair of level quantization values of high and low conversion gains can be realized, and the column-level latch module has a small circuit area and a low cost.

The utility model provides a drying machine convenient to clean, which relates to the technical field of drying machines and comprises a drying machine body, a support is fixedly mounted in the drying machine body, a sliding groove is formed in the side face of the support, a tray is slidably connected in the sliding groove, a hinge is fixedly mounted on the surface of the drying machine body, and the hinge is fixedly connected with the support. A cover plate is fixedly mounted on the surface of a hinge, a better use effect is achieved, after long-time use, a rotating handle is firstly pinched to rotate, a threaded rod rotates backwards through a rotating groove, and the threaded rod can be taken out of a fixing plate through a fixing groove after completely rotating out of the interior of the filter box through the rotating groove; and at the moment, the handle can be held to pull backwards, so that the filter box slides out of the interior of the filter box through the mounting groove, and the problem that the filter box is arranged on the side face of the air inlet of an existing dryer, most of the filter screens are directly and fixedly mounted in the filter box, and the filter box needs to be detached for cleaning after being used for a long time is solved.

The present disclosure provides a cooling system for driving motor and driving motor, and belongs to the technical field of electric vehicles. The cooling system comprises a shaft tooth oil injection assembly and a sealing oil ring. The shaft tooth oil injection assembly is located in the motor shell and has a hollow structure. The shaft tooth oil injection assembly has an oil inlet, an oil outlet and a plurality of shaft tooth oil injection holes. Each shaft tooth oil injection hole is arranged one-to-one corresponding to each part of the shaft tooth part to be cooled. The sealing oil ring is located in the motor shell and connected with one end of the stator and rotor part. An annular cavity is formed between the sealing oil ring and the inner wall of the motor shell. The sealing oil ring has a plurality of stator oil injection holes. The stator oil injection holes are in communication with the annular cavity. The annular cavity is in communication with the oil outlet. The present disclosure can improve the cooling effect of the driving motor.

The utility model provides a rotor assembly of a hollow shaft brake motor, and relates to the technical field of brake motors. The rotor assembly comprises a hollow shaft, a plastic end plate, a plurality of magnetic steels and a rotor sheath. Wherein a protruding ring sleeve is arranged on the side face of the hollow shaft, and a first positioning structure is arranged on the end face of one side of the protruding ring sleeve; a through hole is formed in the middle of the plastic end plate, a second positioning structure and a plurality of magnetic steel pasting surfaces are arranged on the plane of one side of the plastic end plate, the plastic end plate is arranged on the hollow shaft in a sleeving mode through the through hole, and the first positioning structure is matched with the second positioning structure; the plurality of magnetic steels are respectively pasted on the plurality of magnetic steel pasting surfaces, and the plurality of magnetic steels surround the side surface of the protruding ring sleeve; and the rotor sheath sleeves and is fixed on the hollow shaft at high temperature, and covers the plurality of magnetic steels. The rotor assembly is low in manufacturing cost, low in process complexity and not easy to crush the magnetic steel.

The invention relates to an anti-disassembly detection structure, method and device, electronic equipment and a medium. The anti-disassembly detection structure is applied to the electronic equipment, the electronic equipment comprises a middle frame and a back shell, and the middle frame is connected with the back shell; the anti-disassembly detection structure comprises an anti-disassembly piece which is arranged between the middle frame and the back shell, and the anti-disassembly piece is used for falling off when the back shell is disassembled from the middle frame; the distance sensor is arranged between the middle frame and the anti-disassembly piece, and the distance sensor is used for detecting the distance between the distance sensor and the anti-disassembly piece or the back shell; the processor is arranged between the middle frame and the back shell, the processor is electrically connected with the distance sensor, and the processor is used for determining whether the electronic equipment is disassembled or not according to the distance detected by the distance sensor. Whether the electronic equipment is disassembled or not is detected through the anti-disassembly piece and the distance sensor, and a series of complex circuits are prevented from being arranged, so that the structural complexity of the electronic equipment is reduced.

The utility model relates to the technical field of welding equipment, in particular to a welding protective sleeve and welding equipment. The welding equipment comprises a welding gun and a welding protective sleeve; the welding gun comprises a connector and a contact tube connected to the connector. The welding protection sleeve comprises a protection sleeve body and an air pipe. The protective sleeve is provided with a protective cavity and an air hole communicated with the protective cavity; the air pipe is provided with an air outlet end and an air inlet end and connected with the protective sleeve, the air outlet end communicates with the air hole, the air inlet end is used for being connected with an air source, and the air pipe is used for blowing air into the protective cavity; the protective sleeve is connected with the connector, and the contact tube is arranged in the protective cavity. The welding equipment blows air through the air pipe connected with the protective sleeve, so that welding slag is cleaned in time, and the shutdown frequency of the welding equipment is reduced; the problems that the welding slag cannot be cleaned in time and falls on a workpiece to be welded subsequently, the appearance of the workpiece to be welded subsequently is poor, and the welding quality is reduced can be solved; and meanwhile, the protective sleeve and the contact tube can be cooled, so that the service lives of the protective sleeve and the contact tube are prolonged.