107results about How to "Avoid short circuit problems" patented technology

The embodiment of the invention relates to the photovoltaic field, and provides a back contact photovoltaic module, which comprises a battery piece body, the back surface of which is provided with first and second fine grids which are alternately arranged along a first direction, and first and second main grids which are alternately arranged along a second direction; a plurality of bonding pads, wherein a single bonding pad is located at the disconnected part of the first fine grid and connected with the second main grid or located at the disconnected part of the second fine grid and connected with the first main grid; a plurality of first insulating strips extending along a second direction, wherein at least two first insulating strips form a first insulating group corresponding to a bonding pad; at least two first insulating strips in a single first insulating group are respectively positioned on two opposite sides of the bonding pad along the first direction, any first insulating strip comprises a communication part, and the communication part covers a partial region of the main grid and end parts of two branches of one fine grid disconnected by the main grid; at least one first insulating strip comprises a protruding part protruding towards the bonding pad so as to cover a partial area of the fine grid close to the bonding pad, and at least improvement of the structural stability of the back contact photovoltaic module is facilitated.

The invention discloses intelligent cooling protection equipment for a new energy battery and a use method thereof, and relates to the technical field of new energy batteries, the intelligent cooling protection equipment comprises a protection box body, the top surface of the protection box body is fixedly connected with a box cover shell through bolts, and the left side and the right side of the inner wall of the box cover shell are each provided with a cooling opening; a fixed pressing shell is fixedly connected to the center of the bottom face of the box cover shell, and intelligent temperature control switches are arranged on the left side and the right side of the bottom face of the box cover shell correspondingly. According to the device, intelligent cooling is carried out in time aiming at high temperature in the battery using process, the problem of energy waste of a new energy battery or short circuit of a battery connecting line is avoided, the device has a fixed battery loosening alarm function, surface damage of the battery caused by loosening in the battery using process is avoided, and the service life of the battery is prolonged. The device can solve the problem of danger of spontaneous combustion and explosion of the damaged battery, the use safety of the battery is ensured, the stability of the whole device in the use process can be ensured, and the problem of shaking of the device in the use process is avoided.

The application provides an alloy frame resistance loading platform and a laser processing device. The alloy frame resistance loading platform comprises: an insulating base module, comprising a loading platform base and an insulating base plate, wherein the loading platform base is configured to provide basic support, and the insulating base plate is arranged on the loading platform base and is configured to be partially insulated from the alloy frame resistance to avoid circuit short circuit during laser processing; a supporting and adsorbing module, arranged on the loading platform base and penetrating through the insulating base plate, configured to adsorb a frame entity part of the alloy frame resistance and avoid the hollowed-out area of the alloy frame resistance to avoid air leakage; and a positioning module, arranged on the loading platform base, configured to push the alloy frame resistance to a positioning reference position.

The utility model discloses a kind of multi-pass solenoid valve with power connection plate, comprising: multiple valve bodies and power connection plate, each valve body has a pair of same direction projecting insert, the power connection plate includes: multiple metal sheets for the conductive connection of the insert and power supply, and plastic layer covering the metal sheet, the metal sheet has wiring end connected with power supply and insert connection plug-in end, the plastic layer exposes the wiring end and the plug-in end, characterized in that, between adjacent two metal sheets, there is the bending part formed by punching cutting, the plastic layer is provided with at least part recess of covering the bending part, to prevent the rebound of bending part, thereby avoid the short circuit problem that multi-pass solenoid valve appears when working.

The utility model discloses a rotary transformer. The rotary transformer comprises a stator core, an insulating part, a coil, a terminal block part, a terminal and a wire holding part, the stator iron core is provided with an annular main body part, a plurality of teeth which extend from the main body part along the radial direction and are arranged along the circumferential direction of the inner side of the main body part, and a plurality of mounting parts which are arranged along the circumferential direction of the outer side of the main body part; the insulating part covers the plurality of teeth; the coil is wound on each tooth through the insulating part; the terminal block part is arranged on the main body part of the stator core and connected with the insulating part, and the terminal block part is of a cubic structure; the terminal is arranged on the terminal block part and extends along the axial direction of the stator core, and the tail end of the winding of the coil is wound at one end of the terminal; one end, wound with the winding tail end of the coil, of the terminal is cylindrical, and the other end of the terminal is square and is provided with a wire through hole for arranging wires; the wire holding portion is provided on the terminal block portion, extends in the axial direction of the stator core, and accommodates the other end of the terminal, the other end of the terminal allowing a wire to be inserted and connected thereto.

The utility model discloses an electric heat tracing band explosion -proof tee joint box, including box body and setting in the wiring port of three lateral surfaces of box body, the inner rear wall of box body is fixed and is embedded with first wiring post, second wiring post and third wiring post, first wiring post is equipped with two, and is arranged in horizontal arrangement, second wiring post is equipped with two, and is arranged in vertical arrangement, third wiring post is equipped with one, and is located one side of the inner rear wall of box body, the inner rear wall of box body still is equipped with first baffle, second baffle and third baffle, first baffle is located the bottom of one first wiring post, second baffle sets up between two second wiring posts, and its shape is U shape and surrounds the second wiring post located above partially, the utility model discloses through built -in baffle realizes the physical isolation between lines, and the copper row of pre -buried ensures the safety of connection, and optimizes space layout to improve explosion -proof security, insulation reliability and installation maintenance convenience significantly.

The present invention discloses a power supply device with a heat dissipation function, which comprises a heat dissipation unit and a battery module with at least one single battery. Two heat dissipation units are provided and are respectively located on both sides of the battery module. The heat dissipation unit comprises a water cooling pipe and at least one heat dissipation component. The at least one heat dissipation component is sequentially sleeved on the water cooling pipe, and the at least one heat dissipation component is connected to at least one single battery in a one-to-one correspondence. In this way, the heat dissipation unit of the present invention can realize local rapid heat conduction of the battery module through the integrated arrangement of the water cooling pipe and the at least one heat dissipation component. At the same time, the distance between adjacent heat dissipation components can be adjusted according to the different sizes of the single batteries. The structure is simple and easy to install. In addition, the device can avoid the problem of battery short circuit while ensuring the heat dissipation effect through the cooperation of the water cooling pipe and the heat dissipation component, and has higher safety and reliability.

The utility model discloses a pole piece printing clamp based on adhesive layer lamination, and relates to the field of battery manufacturing. The first positioning piece is provided with a positioning groove capable of accommodating and positioning the pole piece group; the second positioning piece is provided with a printing groove and a plurality of liquid passing channels, the two opposite sides of the second positioning piece are provided with a first surface and a second surface correspondingly, the first surface is sunken to form the printing groove, and the liquid passing channels are formed in the groove bottom of the printing groove and penetrate through the second surface; when the first positioning piece is in a first state, the second surface is attached to the first positioning piece, the second surface and the positioning groove define a positioning cavity capable of containing and positioning a pole piece set, and the liquid passing channel communicates with the positioning cavity so that the liquid passing channel can be aligned with a pole piece suspension area of the pole piece set in the positioning cavity; and when the first positioning piece is in the second state, the first positioning piece is separated from the second positioning piece. According to the utility model, the adhesive layer can be efficiently and accurately formed in the pole piece suspension area of the pole piece group, and the problem of short circuit caused by internal collapse of the battery cell module in a pressure test due to the existence of the pole piece suspension area is solved.

The utility model relates to the technical field of household appliances, in particular to a safe electric connection structure of a spraying device of an electric hair drier. According to the technical scheme, the electric hair drier comprises an electric hair drier body and a spraying device body, and a containing groove used for inserting and fixing the spraying device body is formed in the middle of an air outlet in the front end of the electric hair drier body; the spraying device body is composed of an atomizing component at the front end and a liquid containing component at the rear end, and a containing groove is composed of a supporting groove part at the front end and an inserting groove part at the rear end. A first electric connecting part is arranged on the atomizing part, and a second electric connecting part is correspondingly arranged in the supporting groove part. The electric hair drier has the beneficial effects that the electric connecting parts, electrically connected with the hair drier main body, on the spraying device are arranged on the two sides of the atomizing part at the front end of the spraying device, so that the two connecting electrodes can be effectively separated from each other and are far away from the liquid accommodating part, and the problem of short circuit at the electric connecting part of the spraying device and the hair drier main body is avoided; the safety performance of the electric connection structure of the spraying device is effectively improved.

This invention discloses a method for preparing tin dioxide hydrated colloidal precursors via dual-anode synchronous electrolysis, belonging to the field of electrochemical preparation technology of inorganic functional materials. The method includes the following steps: a) preparing an electrolyte containing 0.01 M hydrochloric acid and adjusting the initial pH value; b) using a high-purity tin plate as anode 1 and a titanium-based size-stabilized electrode as anode 2; using the titanium-based size-stabilized electrode as a common cathode; c) applying a DC voltage for constant-voltage synchronous electrolysis; anode 1 dissolves to generate stannous ions, anode 2 electrolyzes chloride ions to generate hypochlorous acid, and the hypochlorous acid instantly oxidizes the stannous ions to tetravalent tin ions in the bulk solution far from the cathode, forming a translucent tin dioxide hydrated colloidal precursor in situ in an acidic medium; d) drying the resulting colloid under reduced pressure and then calcining it at 200–250℃ to obtain high-purity nano-tin dioxide. This invention achieves integrated "dissolution-oxidation-gelation" through dual-anode synergy, avoiding the loss of hypochlorous acid during cathode reduction.

The invention provides a high-frequency carrier plate and a manufacturing method. The high-frequency carrier plate comprises a first copper foil layer, a first PP layer, a first LCP layer, a first bonding layer, a core plate layer, a second bonding layer, a second LCP layer, a second PP layer and a second copper foil layer which are sequentially stacked in the height direction. The LCP layer is matched with the PP layer, so that the loss of high-frequency signals in the transmission process is reduced, and the transmission quality of the high-frequency signals is improved; and the glass fiber reinforced PP layer is arranged, and meanwhile, the insulation effect of the PP layer is improved through glass fibers, so that the problem of short circuit of the PCB is avoided. The PP layer is arranged on the outer side of the LCP layer, deformation of the LCP layer under the influence of the welding temperature is avoided, meanwhile, glass fibers of the glass fiber reinforced PP layer are used for supporting the copper foil layer, and the supporting performance of the high-frequency carrier plate is improved.

This utility model relates to a transformer body clamping structure, belonging to the field of transformer manufacturing technology. It includes a transformer body main body, comprising a core, coils on the outer side of the core, and core clamping components. The distributed clamping structure includes side yoke pads, a central yoke pad, and a central insulating pressure plate assembly. The distributed clamping structure is used to axially clamp the coils, and the side yoke pads, central yoke pads, and central insulating pressure plate assembly are all located between the core clamping components and the coils. The side clamping protection structure includes side channel steel, a side insulating pressure plate assembly, and coil pressing support strips. This utility model, through the distributed clamping structure and the side clamping protection structure, improves the heat dissipation capacity of the internal structure of the transformer body, reduces the risk of deformation of the internal structure during sudden short circuits, and significantly improves the transformer's short-circuit withstand capability.

This utility model relates to an anode, comprising an anode plate, an anode plate frame, a gas collecting chamber, a first diaphragm, and a second diaphragm. The anode plate frame defines an anode plate receiving space with front and rear openings. The anode plate is placed within this space, and the gas collecting chamber is located above and communicates with it. An acid mist outlet is provided on one side of the gas collecting chamber. The first diaphragm covers the front end of the anode plate frame to close the front opening of the anode plate receiving space, and the second diaphragm covers the rear end of the anode plate frame to close the rear opening of the anode plate receiving space. Furthermore, the periphery of the first diaphragm is detachably and sealingly connected to the front end of the anode plate frame and the front wall of the gas collecting chamber, and the periphery of the second diaphragm is detachably and sealingly connected to the rear end of the anode plate frame and the rear wall of the gas collecting chamber. This design avoids a series of adverse effects caused by the diaphragm contacting the anode and cathode during use.

The present invention relates to a walking mechanism of an intelligent robot, comprising a frame, a gear box and a driving motor, wherein the gear box is arranged on the frame, the driving motor is arranged in the gear box, and the driving motor drives the walking wheels to walk through the gear box; a cutting assembly is symmetrically arranged on both sides of the frame, the cutting assembly is located between the two walking wheels on the same side, and the cutting assembly is used to clean the wheel axles on the walking wheels; the present invention arranges the cutting assembly on the frame, and utilizes the cutting assembly to move relative to the cutting assembly while walking, so as to cut off and clean the sundries wound on the wheel axles, thereby reducing the occurrence of the walking wheel jamming, playing a role in ensuring the normal walking of the robot and the safety of the people around, and improving the practical application value of the walking mechanism of the intelligent robot.

The utility model discloses a combined circuit board, include: circuit female board and circuit daughter board, the outer edge of circuit female board is provided with the socket, one end of circuit daughter board is provided with the plug, the utility model discloses through the butt joint of plug and socket, realizes the connection of circuit female board and circuit daughter board circuit, then is provided with the tensioning assembly between plug and socket, makes plug and socket close adhesion, prevents the separation of plug and socket, leads to the circuit virtual connection of plug and socket inside, is provided with locking assembly on plug and socket simultaneously, is used for with circuit female board and circuit daughter board and carries out stable connection, prevents the shake between circuit daughter board and circuit female board, leads to the shake of plug and socket and circuit female board and circuit daughter board junction, causes the short circuit of circuit, thereby avoids the problem that traditional combined circuit board circuit is easy to short circuit.

This utility model discloses a battery, comprising: a casing having a receiving cavity, the casing having a lead-out wall surface, the lead-out wall surface having a first through hole communicating with the receiving cavity; a battery cell disposed within the receiving cavity, the battery cell including a tab assembly; a terminal assembly including a terminal body, a connecting piece, and an insulating and sealing connection layer, the connecting piece and the lead-out wall surface being welded together to form a solder mark, the connecting piece having a second through hole, the first through hole and the second through hole corresponding to each other, the terminal body being connected to the tab assembly, the terminal body including a sheet portion and a pillar portion, the pillar portion passing through the first through hole and the second through hole, the sheet portion and the pillar portion being connected, the insulating and sealing connection layer being disposed between the sheet portion and the connecting piece; and an insulating member disposed between the tab assembly and the casing, wherein, in the length direction of the battery, the orthographic projection of the insulating member on the lead-out wall surface at least partially covers the solder mark. The battery of this utility model embodiment not only has good sealing performance and simple manufacturing process, but also high energy density.

The application provides a display panel and a preparation method thereof and a display device. The display panel comprises a substrate, a plurality of pads located in a non-display area, the plurality of pads are arranged at intervals on one side of the substrate, and a gap is formed between adjacent pads; a side wall of the pad near the gap comprises an inclined surface, the inclined surface is inclined in a direction away from the gap along a direction away from the substrate; and an insulating structure is located at least in the non-display area, the insulating structure at least partially fills the gap, and a normal projection of the inclined surface on the substrate at least partially overlaps a normal projection of the insulating structure on the substrate. The display panel provided by the application avoids the problem of dissection when a subsequent insulating layer is formed to a certain extent by arranging the inclined surface on the side wall of the pad or by filling the gap with the insulating structure and not being lower than the pad, thereby avoiding short circuit caused by the contact between the side wall of the pad and other metals, and improving the reliability and use performance of the display panel.

The utility model provides a sealing element, a battery cap and a battery, the sealing element is used for insulating and sealing a gap between the cap of the battery and a shell, the sealing element comprises a body, and the body comprises a first sub-body located between the shell and the cap; wherein the melting point of at least part of the first sub-body is greater than the temperature in the enclosure space of the shell when the battery is in the maximum discharge state. In the embodiment of the invention, the melting point of at least part of the first sub-body is higher than the temperature in the enclosure space of the shell when the battery is in the maximum discharge state, that is, the first sub-body does not melt or partially melt when the battery is in the maximum discharge state; namely, the first sub-body can still separate the cap and the shell of the battery when the battery is in the maximum discharge state, so that the problem of short circuit of the battery caused by contact between the shell and the cap is avoided.

The utility model discloses an inductive heating equipment convenient to radiate, relates to inductive heating equipment field, including inductive heating equipment body, the both sides of inductive heating equipment body are equipped with the heat dissipation hole, and the inside of inductive heating equipment body is provided with air inlet fan, the inside of heat dissipation hole is provided with filter assembly, filter assembly includes stop plate, fixed frame and filter tow, one side of stop plate is fixed with fixed frame, and the inside of fixed frame is provided with filter tow. The utility model discloses air inlet fan work can inhale the gas of outside to inductive heating equipment, to realize the purpose of radiating inside, can filter dust through the filter tow of setting, avoid dust and can be attached on the top of circuit board, and cause the problem of circuit board short circuit, through the extrusion component of setting can realize the purpose of fixed filter assembly, and spring gives the spring of extrusion block to make stop plate and inductive heating equipment outer wall closely adhere.

The application discloses a push rod component and a relay. The push rod component comprises a first component and a second component. The first component has two spaced-apart openings. The second component has two protrusions which are respectively arranged in the two openings. The protrusions have deformation portions which are located outside the openings. The deformation portions of the two protrusions can be deformed when subjected to external force to connect the first component and the second component.

The invention discloses a transistor, a preparation method thereof, a semiconductor device and electronic equipment. The transistor includes a channel, a gate structure, a first pole assembly, and a second pole assembly. The gate structure includes a gate electrode. The first pole assembly and the second pole assembly are located on the two sides of the gate structure in the first direction respectively and connected with the channel. The orthographic projection of at least one of the first pole assembly and the second pole assembly on the substrate is overlapped with the orthographic projection of the channel on the first plane; or, the orthographic projection of the first pole assembly and the orthographic projection of the second pole assembly on the first plane are not overlapped with the orthographic projection of the channel on the first plane, and the two ends of the gate structure in the first direction are correspondingly flush with the two ends of the channel in the first direction. According to the transistor and the preparation method thereof, the semiconductor device and the electronic equipment, the distance between the gate electrode and the source / drain electrode can be reduced, and the electrical property of the transistor can be improved.

The utility model discloses a high-power high-voltage direct-current contactor, which comprises a shell, a binding post is arranged at the top of the shell, the binding post is mounted on a ceramic arc extinguishing cover, two ends of the ceramic arc extinguishing cover are lapped on a magnetic conductive plate, the lower part of the magnetic conductive plate is lapped on a coil, and the coil is accommodated in a U-shaped magnet yoke; a contact support penetrates through the center of the magnetic conductive plate, a contact bridge is connected to the top of the contact support, a spring seat is arranged in the middle of the contact support, the contact bridge and the spring seat are connected through a contact spring, a push rod is inserted into the center of a base of the spring seat, the bottom of the push rod sequentially penetrates through static iron and an armature, and the static iron and the armature are sequentially sleeved with a sealing sleeve. The sealing sleeve is welded with the bottom of the concentrating flux plate; according to the utility model, through the design of the integrated contact support and the push rod limiting groove, the flatness, the compact degree and the action speed of the contact in the connection and disconnection process of the product are improved while the stroke parameters of the product are ensured, and meanwhile, the insulation gasket is additionally arranged, so that the product can be reliably connected and disconnected under the conditions of high voltage and large current.

The utility model discloses a threaded vertical plate evaporation equipment, including base, the top center position fixed mounting stand of base, spiral flow channel, spiral flow channel spiral installation is on the outer wall of stand, the inner wall of spiral flow channel is equipped with evaporation flow channel, the inner wall of evaporation flow channel evenly is provided with vertical plate the utility model belongs to evaporation equipment technical field, the utility model discloses the purpose is in the prior art in the limited space cannot effectively increase the contact area of water body and air, reaches the technical effect for: spring -like spiral flow channel has prolonged the liquid flow path, and the overflow structure formed by vertical plate makes liquid need to fill the current water storage space after can enter next space, and the residence time of liquid in evaporation flow channel is forced to prolong, and this design effectively avoids the short circuit problem caused by liquid flow too fast in traditional equipment, and the contact area is increased, and the evaporation efficiency is improved significantly, and the liquid processing speed is accelerated.

The invention relates to the field of power distribution cabinets, in particular to an energy-saving power distribution cabinet for photovoltaic power generation, which comprises a base, a power distribution box, a water-cooling heat dissipation frame, a fan and the like, the base is fixedly connected with a distribution box; the rear side of the distribution box is fixedly connected with a water-cooling heat dissipation frame used for assisting heat dissipation, the water-cooling heat dissipation frame is hollow, and the water-cooling heat dissipation frame is provided with a heat conduction plate. The distribution box is fixedly connected with a plurality of fans. Water flows through the water-cooling heat dissipation frame, the water-cooling heat dissipation frame is kept at a low temperature all the time, so that a fan is assisted in dissipating heat of electrical elements, the heat dissipation effect on the electrical elements is greatly improved, water flows into a sliding groove, a buoyancy plate, a sealing plate and a connecting rod move upwards, and the heat dissipation effect on the electrical elements is greatly improved. And the sealing plate is used for blocking splashed water when the spindrift hits the base, so that the problem that the water passes through the heat dissipation holes in the distribution box and enters the distribution box to cause short circuit of an internal circuit of the distribution box is solved.

The invention relates to a biomass gasification system and a gasification method. The gasification system comprises a pressurized feeding unit, a fluidized bed gasification unit, a deslagging unit, an entrained-flow bed high-temperature cracking unit, a synthesis gas washing unit, a slag water unit and a gasification agent conveying unit, the fluidized bed gasification unit comprises a fluidized bed gasification furnace and a high-temperature cyclone separator; the fluidized bed gasification furnace is connected with the pressurized feeding unit, the gasifying agent conveying unit, the high-temperature cyclone separator and the deslagging unit; the entrained-flow bed high-temperature cracking unit comprises an entrained-flow bed high-temperature cracking furnace, and the entrained-flow bed high-temperature cracking furnace is connected with a high-temperature cyclone separator, a gasifying agent conveying unit, a synthesis gas washing unit and a slag water unit. Compared with the prior art, the invention couples the advantages of the fluidized bed and the entrained-flow bed, and has the characteristics of wide raw material applicability, high effective gas content, no tar, low energy consumption and the like.

The invention provides a mainboard non-contact type semi-immersion liquid cooling server, and relates to the technical field of server heat dissipation. The server comprises a mainboard bin, a partition plate and a fluid bin which are sequentially arranged from top to bottom, wherein the partition plate is arranged between the mainboard bin and the fluid bin; a main board is arranged in the main board bin, the main board is installed in the main board bin in an inverted mode, and the back of the main board is arranged upwards; a CPU module, a memory bank module, a GPU module, a hard disk module and a power supply module are respectively mounted on the mainboard; the GPU module is connected with the mainboard in parallel through a cable, and the CPU module, the memory bank module, the GPU module, the hard disk module and the power module are all provided with heat-conducting fins. Thermal interface materials are filled between the heat-conducting fins and the CPU module, the memory bank module, the GPU module, the hard disk module and the power supply module; the heat-conducting fins penetrate through the partition plate and extend into the fluid bin. The heat dissipation performance of the server can be remarkably improved, meanwhile, liquid is prevented from making contact with the mainboard, the structure is simple, modification is easy, and the heat dissipation device is suitable for cabinet server equipment.

The utility model relates to the technical field of lamp fixing devices, and particularly discloses a wire waterproof tensile device for a landscape lighting lamp, an upper cover is provided with a barb matched with a clamping groove, a lower cover is provided with a first arc-shaped groove penetrating through the two ends of the upper cover, and a first sealing gasket and an anti-skid belt are laid in the first arc-shaped groove; the first sealing gaskets are located at the two ends of the first arc-shaped groove, the anti-skid belt is located in the middle of the first arc-shaped groove, the upper cover is provided with a second arc-shaped groove penetrating through the two ends of the upper cover, and a second sealing gasket and a buffering gasket are laid in the second arc-shaped groove. The electric wire is effectively prevented from moving due to manual pulling, gaps are avoided, meanwhile, the waterproof capacity of the connecting position of the electric wire and the lamp tube is improved, the short circuit problem is avoided, and the service life of the lamp is guaranteed.

The sound box comprises a sound box body, a first surface of the sound box body is movably connected with a display screen, a second surface of the sound box body is provided with a containing space and a containing bin used for containing the microphone, and the containing space is matched with the containing bin. The storage bin is provided with a power supply assembly used for charging the microphone, and the storage bin can move relatively towards the storage space. The display screen and the storage bin are respectively arranged on different surfaces of the sound box body and are relatively independent, when the sound box body works, the display screen is opened, the storage bin can be completely stored in the sound box body at the moment, and the storage space is matched with the storage bin, so that when the storage bin is completely stored in the sound box body, the sound box body is prevented from being damaged. And the power supply assembly of the storage bin is not exposed in the external environment, so that the problem of short circuit caused by long-time exposure of the power supply assembly in the external environment is avoided.

The application discloses a circulating fan for dry quenching system and relates to the field of circulating fans, which comprises a fan shell, an air inlet, an air outlet, an air inlet flange, a cleaning cylinder arranged at the air inlet of the fan shell, a filter cylinder arranged in the cleaning cylinder, wherein the filter cylinder is in the shape of a truncated cone, the smaller end of the filter cylinder is arranged away from the fan shell, and a wind guide cylinder corresponding to the filter cylinder is arranged at the end of the cleaning cylinder away from the fan shell; and a dust collecting unit is arranged at the end of the filter cylinder close to the fan shell, which is used for collecting and treating the impurities filtered out. The cleaning cylinder with the filter cylinder in the shape of a truncated cone is arranged at the air inlet of the fan, the coke powder and dust impurities in the circulating gas are completely filtered out before entering the fan shell through the front filter structure, the problems of the erosion and abrasion of the fan impeller and the internal flow channel and the flow channel blockage caused by the dust are avoided from the root, the operation failure rate of the fan is significantly reduced, and the service life of the whole machine is prolonged.