61results about How to "Effective grounding" patented technology

The invention relates to a capacitance DC (Direct Current) blocking on-off controllable bridge circuit for inhibiting DC magnetic bias of a transformer, which is characterized by comprising a bypass ground loop, a transformer neutral wire earthing switch K1, a DC blocking switch K 2, a DC blocking capacitor C and a transient current inhibiting bridge circuit. Compared with a conventional capacitance DC blocking circuit, the capacitance DC blocking on-off controllable bridge circuit utilizes a DC inductance in the transient current inhibiting bridge circuit to limit the rising change rate of a short circuit current on the initial stage of system failure, does not need to control system response and adopts an instantaneous automatic switching mode, so that the capacitor is avoided being impacted and damaged by a transient current, a neutral point of the transformer is guaranteed to be effectively grounded and a control system has sufficient response time to switch working modes; addition of the transient current inhibiting bridge circuit has no any influence on an AC (Alternate Current) loop in the normal operating process; a DC component can be well inhibited from flowing into the transformer; the DC magnetic bias of the transformer is effectively inhibited; safety of the system is ensured; and the capacitance DC blocking on-off controllable bridge circuit has the advantages of simple structure of a control circuit, convenience for implementation, reliable performance, small size, low price and the like.

The invention provides a thunder and lightning protective survey early warning system and a using method. The system comprises a data collecting module, a data processing module, a system control module and a thunder and lightning protective device, wherein the data collecting module comprises a data detecting assembly and a data integration unit; the data integration unit collects and arranges data detected by the data detecting assembly and uploads the data to the data processing module; the data processing module formulates a processing scheme for data processing; and the system control module controls the thunder and lightning protective device according to the processing scheme. The thunder and lightning protective survey early warning system carries out safety detection on the thunder and lightning protective device and ensures that the thunder and lightning protective device is effectively grounded to enable the thunder and lightning protective device to be in a normal working state.

The invention relates to a motor, relates to the field of motor equipment, and mainly aims at solving technical problems that a conventional motor is not sufficient in mechanical strength and has a problem of shaft current corrosion. The main technical scheme of the invention is that the motor comprises a motor case, a plastic packaging part, and a stator module with a stator core; the stator module is disposed in the motor case, and there is a gap between the stator module and the motor case; the strength of the motor case is greater than the strength of the plastic packaging part; the plastic packaging part is located in the gap, and is integrated on the stator module and the motor case. In addition, the motor case can be made of a conductive material, such as metal. The stator core makes contact with the motor case. According to the technical scheme of the invention, the strength of the motor case is greater than the strength of the plastic packaging part, thereby enabling the mechanical strength of the whole motor to be increased. In addition, because the stator core makes contact with the metal motor case and is in effective connection with a rear end cover and a rotor bearing to form an equipotential level, the motor is enabled to be grounded effectively, and the shaft current of the motor is reduced.

The invention relates to a manufacture process of a conformal shielding structure applying lead bonding. The process comprises the following steps: preparing a substrate with multiple radio frequency module units arranged thereon, adjacent radio frequency module units being bonded through multiple leads; connecting the bottom ends of the multiple leads to a grounding layer; performing glue sealing on the multiple radio frequency module units on the substrate by use of filling resins, the height of the filling resins being higher than the height of any leads; performing semi-cutting or total cutting between the adjacent radio frequency module units to enable the leads to be exposed from the side walls of the filling resins; and performing sputtering to deposit metal layers on the surfaces of the filling resins, the metal layers being in contact with the leads so as to enable the metal layers to be connected with the grounding layer. The manufacture process of the conformal shielding structure, provided by the invention, ingeniously applies the lead bonding, can easily enable the shielding layers in radio frequency modules to be conducted with internal circuits, and can ensure that the shielding layers of the radio frequency modules are effectively grounded without using any additional components for connection with the side wall.

The invention relates to a capacitive casing end screen signal detection device. The existing device has the disadvantages of inconvenient installation, large signal attenuation, low detection efficiency, potential safety hazard and the like. The device provided by the invention comprises a signal acquisition device and a signal processing device, wherein the signal acquisition device and the signal processing device are in threaded connection. The signal acquisition device comprises a first metal casing body, an end screen wiring terminal, a high-frequency partial discharge sensor and a low-frequency dielectric loss sensor. The end screen wiring terminal is located in the first metal casing body. The high-frequency partial discharge sensor and the low-frequency dielectric loss sensor sleeve the end screen wiring terminal. The signal processing device comprises a second metal casing body, a high frequency signal conditioning circuit board, a low frequency signal conditioning circuit board, a high frequency BNC connector and a low frequency BNC connector. The high frequency signal conditioning circuit board and the low frequency signal conditioning circuit board are arranged in thesecond metal casing body. The BNC connector is arranged on the second metal casing body. The capacitive casing end screen signal detection device provided by the invention has the advantages of excellent shielding performance, good anti-interference performance, safe and reliable use and long service life, and can effectively adapt to the on-site environment.

The invention discloses an integrated intelligent combination box-type substation. The substation comprises a fuse combination cabinet, and a tripping interlock is arranged between a mechanism area and a triangular fuse tube area of the fuse combination cabinet; the triangular fuse tube area is provided with a door plank, and a mechanical interlock is arranged between the mechanism area and the door plank; a grounding system for a fuse tube is arranged inside the triangular fuse tube area; the bottom of a shell of the fuse combination cabinet is a shell bottom layer, and the shell bottom layeris a double-layer plate; the fuse combination cabinet is located inside a substation outer box, a transformer is arranged below the fuse combination cabinet, a cable connection box is arranged at theleft side of the fuse combination cabinet, and a low-voltage cabinet is arranged at the right side of the fuse combination cabinet; and the fuse combination cabinet and the transformer are connectedthrough a plurality of E-shaped connectors. The substation has the advantages of effective waterproofness, high safety, effective grounding, effective relief and effective connection.

The invention relates to a three-station switch with the capability of breaking a bus transfer current and solves the problems that a moving contact of the existing three-station switch has low moving speed and SF6 gas with good insulating capacity needs to be used as insulating gas for realizing rapidly breaking of the bus transfer current, so that the environment pollution can be caused. The three-station switch is characterized in that an isolation breaking conductor is arranged in an inner cavity of an isolation conductor; an isolation conductor contact finger spring is arranged in the isolation breaking conductor; a moving conductor is arranged in an inner cavity of a middle conductor; a breaking spring and a conducting rod are arranged in an inner cavity of the moving conductor; a rack is fixedly connected in a rack mounting groove processed on the moving conductor; and the middle conductor is provided with a gear meshed with the rack. The three-station switch has the beneficial effects that by rapidly breaking the conducting rod and generating compressed air blast, the rapid breaking of an isolation switch is realized and the aim of extinguishing an electric arc generated by the bus transfer current is fulfilled, so clean and dry air or nitrogen can be used as the insulating gas, the SF6 gas does not need to be used as the insulating gas and equipment is more environmental-friendly.

The invention relates to a packaging structure shared by a heat dissipation channel and a ground wire channel in three-dimensional packaging. The packaging structure comprises a packaging chip, wherein the packaging chip comprises a substrate; the substrate internally comprises a power connecting hole, a heat dissipation grounding hole and a signal connecting hole; a power connecting conductor is filled in the power connecting hole; a heat dissipation grounding conductor is filled in the heat dissipation grounding hole; a signal connecting conductor is filled in the signal connecting hole; the power connecting conductor is isolated from the substrate through an insulation layer in the power connecting hole; the signal connecting conductor is isolated from the substrate through an insulation layer in the signal connecting hole; a heat sink ground plane plate is arranged above the packaging chip; a base plate is arranged under the packaging chip; the heat sink ground plane plate is arranged in the base plate; an upper end of the heat dissipation grounding conductor is contacted with the heat sink ground plane plate; and a lower end of the heat dissipation grounding conductor is contacted with the heat sink ground plane plate in the base plate. The packaging structure has a simple and compact structure, is favorable to improve a heat dissipation effect and a grounding effect of three-dimensional packaging, is wide in application range, and is safe and reliable.

The invention provides a transformer DC bias suppression device, which includes a detection control unit, a suppression unit, a lightning rod, a knife switch and a first resistor; the detection control unit is connected to the suppression unit; the neutral point of the transformer is connected to the suppression unit in parallel , lightning rod, knife switch, and then the first resistor in series, and then grounded. A suppression method applied to the suppression device and a transformer system comprising the suppression device or comprising the suppression method are also provided. The invention has the beneficial effect of applying a direct-current bias scheme in which a wide bandgap semiconductor device SiC IGBT is combined with a resistor in series. It is proposed to use a semiconductor switch as a DC blocking device. Under the condition of ensuring the effective grounding of the transformer, the average grounding current is maintained within a reasonable threshold to achieve the effect of suppressing the DC bias of the transformer. It can effectively ground the suppression device, withstand voltage level, Find a better balance in several aspects of flexibility and expanding the scope of application.

The invention discloses a small-size air purifier which comprises a shell, an electrostatic dust collection part, a contact agent module, a power supply module and a turbofan, wherein the electrostatic dust collection part, the contact agent module and the turbofan are sequentially arranged on the air path of the purifier; the electrostatic dust collection part is communicated with the contact agent module and an air inlet of the air path; a fan accommodating cavity is arranged on the outlet side of the contact agent module; an air duct opening communicated with an air outlet is formed in the fan accommodating cavity; the turbofan is fixed in the fan accommodating cavity; an air outlet pipe of the turbofan is plugged into the air duct opening; the power supply module comprises a circuit control board and a high-voltage generator; the circuit control board is arranged in the fan accommodating cavity and is connected with the high-voltage generator; the electrostatic dust collection part comprises a high-voltage sheet, a high-voltage wire fixing plate, an elastic piece and a high-voltage wire; and the high-voltage wire is wound on the high-voltage wire fixing plate and tensioned by the elastic piece. Electrostatic dust collection equipment, a contact agent and strong wind equipment are arranged in the air purifier; and furthermore, the small-size air purifier can realize a safe insulation structure in a small space to guarantee long-term safe operation of an electrostatic dust collector.

An electronic device having a housing at least partially composed of metal, comprising: a discharge circuit connecting a metal part of the housing to a ground provided in the electronic device, the discharge circuit comprising a parallel circuit consisting of a resistor and a discharge tube .

The invention discloses a box comprising a box body. An aluminum powder layer is arranged on the box body. A wire passing hole is formed in the bottom surface in the aluminum powder layer. A wire is arranged at the bottom of the box body. The wire penetrates through the wire passing hole and extends out of the bottom surface of the aluminum powder layer. The spray coating system of the box comprises a spray coating gun body. The front end of the spray coating gun body is provided with a telescopic spray coating pipe. The front end of the spray coating pipe is provided with a spray coating nozzle. A motor controlling the spray coating pipe to extend and retract is arranged on the spray coating gun body. According to the box and the spray coating system of the box, by means of the manner ofadditionally arranging the aluminum powder layer, a good electromagnetism shielding effect is achieved, radiation is avoided, the corrosion resistance of the box is improved, electronic components ofan LED display screen are effectively protected, and the service life of the LED display screen is prolonged; and in addition, coating materials are cooled through circulating cooling water, it is avoided that pressurization of a material containing tank is caused by an excessively high temperature, and the safety of spray coating operation is ensured.

The invention belongs to the technical field of current transformers, and particularly relates to a current transformer with a low-voltage shielding function. The current transformer comprises an insulator, a primary coil and a secondary coil, wherein the primary coil and the secondary coil are encapsulated in the insulator; the primary coil penetrates through a central hole of the secondary coil;low-voltage shielding devices arranged below the primary coil are arranged at the two ends of the secondary coil; each low-voltage shielding device comprises a metal wire weaving net, a metal wire and an embedded nut; a secondary lead of the secondary coil is led out from the insulator; and the secondary lead is arranged below the metal wire weaving net. According to the current transformer, high-voltage electric fields of the primary coil of the current transformer are shielded in the metal wire weaving nets in order to play a protective effect on the insulation; and meanwhile, the partial discharge level of a current transformer product is greatly improved after processing through a method.

The invention relates to a tread pattern on a tire. The tread pattern on the radial tire of a car, which comprises a central pattern block, side pattern blocks and shoulder pattern blocks, is characterized in that: the central pattern block is at the center of the tread, the left side and the right side of the tread are respectively provided with side pattern blocks and shoulder patterns which are arranged from the inner side to the outer side, the central pattern block is a longitudinally integrated bar-shaped pattern block, and the central pattern block and the shoulder pattern blocks at a same side are spaced by a main longitudinal pattern groove; each two adjacent side pattern blocks are spaced by a side pattern trench, one end of each side pattern trench is communicated with the main longitudinal pattern groove, and the other end of each side pattern trench is communicated with an auxiliary longitudinal pattern groove; each two adjacent shoulder pattern blocks are spaced by a shoulder pattern trench, and the shoulder pattern trenches are communicated with the auxiliary longitudinal pattern grooves; and bending directions of the side pattern trenches and the shoulder pattern trenches at the left side are opposite to bending directions of the side pattern trenches and the shoulder pattern trenches at the right side. The tread of the tire, which adopts a mixed pattern, has enough braking force, good control performances and a beautiful and decent profile.

The invention relates to a neutral point and shell dual ground system for transformers and solves the defect that proneness of transformer ground contacts to corrosion or breaking causes major sources of hidden dangers as compared with the prior art. The system comprises a transformer, ground flat bars, and a current transformer; the ground flat bars are fixedly and vertically mounted on a ground device; a neutral point of the transformer is connected with the current transformer; the current transformer is connected with copper connecting terminals B of the ground flat bars through neutral point ground wires; shell ground contacts of the transformer are connected with copper connecting terminals A of the ground flat bars through transformer shell ground wires; the copper connecting terminals A are 60mm away from the copper connecting terminals B; the copper connecting terminals A are connected with the copper connecting terminals B through cotton covered wires which are BVR35 in specification. The neutral point and shell dual ground system for transformers has the advantages that effective grounding can be maintained even after one ground terminal is corroded and broken.

The invention discloses a grounding protection switch of a transformer neutral point. The switch is composed of an incoming wire insulated terminal and an outgoing wire insulated terminal; the incoming wire insulated terminal is connected with an upper copper bar; the outgoing wire insulated terminal is connected with a lower copper bar; and the upper copper bar and the lower bar are connected tothe upper end and the lower end of a switch core assembly. The switch core assembly consists of an operating mechanism, a driving assembly connected to the operating mechanism, and a vacuum arc-extinguishing chamber connected to the driving assembly; and the lower copper bar is connected to the lower end of the vacuum arc-extinguishing chamber. A transformer neutral point is connected with a ground conductor through the incoming insulated terminal and the outgoing insulated terminal of the switch to realize heavy-current effective grounding. Opening and closing are controlled by the switch core assembly.

The invention provides a lightning protection system and a using method. The lightning protection system comprises a lightning protection monitoring and early warning system, a lightning protection device of power generation equipment and a lightning protection device of current transmission equipment. The lightning protection monitoring and early warning system is in data connection with the lightning protection device of power generation equipment and the lightning protection device of current transmission equipment. The lightning protection monitoring and early warning system collects environmental parameters and controls the lightning protection device of power generation equipment and the lightning protection device of current transmission equipment by processing the environmental parameters. According to the lightning protection system, the lightning protection monitoring and early warning system conducts safety detection on the lightning protection device of power generation equipment and the lightning protection device of current transmission equipment, and it is ensured that the lightning protection device of power generation equipment and the lightning protection device of current transmission equipment are connected to the ground effectively and in normal working states.

The invention provides a lightning protection device of power generation equipment and an application method. The device comprises air terminations, a control device, a connection device, a groundingdevice and a control component, the air terminations are arranged in blades of the wind power generation equipment, and the control device is arranged in a wheel hub of the wind power generation equipment; the connection device is connected with the air terminations, the control device is connected with the grounding device, and the control component is connected with the control device through data. Through the control component of the lightning protection device of the power generation equipment, an effective lightning protection and electric conduction circuit is formed in the lightning protection device of the power generation equipment, and the lightning protection effect of the lightning protection device of the power generation equipment is guaranteed.

The invention discloses a current sensor which comprises a magnetic core, a Hall chip, a printed circuit board and a crimping elastic sheet. The magnetic core is provided with an air gap, the Hall chip is arranged in the air gap, and the Hall chip is welded and fixed on the printed circuit board; a grounding terminal is arranged on the printed circuit board, the crimping elastic sheet is arrangedbetween the magnetic core and the printed circuit board and is respectively connected with the magnetic core and the printed circuit board, and the crimping elastic sheet is electrically connected with the grounding terminal. According to the current sensor, effective grounding of the magnetic core is realized, the measurement precision is ensured and the current sensor is convenient to assemble.

The invention relates to a double grounding system for a neutral point and an outer shell of a transformer. Compared with the prior art, the grounding point of the transformer is easily corroded or disconnected, thereby causing major safety hazards. The invention includes a transformer, a grounding flat iron and a current transformer, the grounding flat iron is fixed and vertically installed on the grounding device, the neutral point of the transformer is connected with the current transformer, and the current transformer and the copper wire nose B of the grounding flat iron pass through The neutral point grounding wire is connected, and the grounding point of the transformer casing is connected to the copper wire nose A of the ground flat iron through the transformer casing grounding wire. The distance between copper wire nose A and copper wire nose B is 60mm, and the copper wire nose A and copper wire nose B are connected by wiring, and the specification of wiring is BVR35. The invention ensures that the effective grounding can continue to be maintained after a grounding terminal is corroded and disconnected.

The invention provides a lighting protection system of a power generation system and a using method of the lighting protection system. The lightning protection system comprises a lighting protection monitoring and pre-warning system and a power generation equipment lighting protection device, wherein the lighting protection monitoring and pre-warning system is in data connection with the power generation equipment lighting protection device; the lighting protection monitoring and pre-warning system is used for collecting environmental parameters which are processed to control the power generation equipment lighting protection device; and the power generation equipment lighting protection device is arranged on power generation equipment for protecting the power generation equipment. According to the lighting protection system provided by the invention, the lighting protection monitoring and pre-warning system is used for performing safety detection on the power generation equipment lighting protection device and the power generation equipment lighting protection device is guaranteed to be effectively grounded, so that the power generation equipment lighting protection device is in anormal working state.

The invention discloses a water temperature sensor which comprises a framework, a magnetic switch, a grounding lug I, a thermistor, a grounding lug II and a shell, wherein the framework is arranged in the shell, the grounding lug II and the grounding lug I are arranged on the framework, the grounding lug II is electrically connected with the shell, the grounding lug I is electrically connected with the grounding lug II, the magnetic switch is arranged in the framework and is electrically connected with the grounding lug I, the other end of the magnetic switch is electrically connected with one of terminals which are positioned at the two sides of the framework, the thermistor is arranged under the framework, one end of the thermistor is electrically connected with the other one of the terminals positioned at the two sides of the framework, and the other end of the thermistor is electrically connected with the grounding lug II. With the arrangement of the grounding lug I and the grounding lug II, the thermistor and the shell are electrically connected together, a guide line and a spring are not required to be used, so that defects of guide line breakage or thermistor crushing are overcome, meanwhile, the assembly process is also simplified; and the grounding lugs are used for direct connection, so that the thermistor is ensured to be effectively grounded, and the measuring reliability is ensured.

The invention provides a lighting protection system of a power generation system and a using method of the lighting protection system. The lightning protection system comprises a lighting protection monitoring and pre-warning system and a power generation equipment lighting protection device, wherein the lighting protection monitoring and pre-warning system is in data connection with the power generation equipment lighting protection device; the lighting protection monitoring and pre-warning system is used for collecting environmental parameters which are processed to control the power generation equipment lighting protection device; and the power generation equipment lighting protection device is arranged on power generation equipment for protecting the power generation equipment. According to the lighting protection system provided by the invention, the lighting protection monitoring and pre-warning system is used for performing safety detection on the power generation equipment lighting protection device and the power generation equipment lighting protection device is guaranteed to be effectively grounded, so that the power generation equipment lighting protection device is in anormal working state.

The invention provides a thunder and lightning protective survey early warning system and a using method. The system comprises a data collecting module, a data processing module, a system control module and a thunder and lightning protective device, wherein the data collecting module comprises a data detecting assembly and a data integration unit; the data integration unit collects and arranges data detected by the data detecting assembly and uploads the data to the data processing module; the data processing module formulates a processing scheme for data processing; and the system control module controls the thunder and lightning protective device according to the processing scheme. The thunder and lightning protective survey early warning system carries out safety detection on the thunder and lightning protective device and ensures that the thunder and lightning protective device is effectively grounded to enable the thunder and lightning protective device to be in a normal working state.

The invention relates to a capacitive bushing high-frequency partial discharge signal detection device. Existing devices have the disadvantages of inconvenient installation, large signal attenuation,low detection efficiency, and hidden safety problems. The capacitive bushing high-frequency partial discharge signal detection device of the invention includes a signal acquisition device and a signalprocessing device which are in threaded connection with each other; the signal acquisition device includes a first metal shell, a terminal screen wiring end, and a high-frequency partial discharge sensor, wherein the terminal screen wiring end is located in the first metal shell, and the high-frequency partial discharge sensor is arranged on the terminal screen wiring end and is fixed through a horizontal ring-shaped baffle; and the signal processing device includes a second metal shell, a signal processing circuit board, and a BNC connector, wherein the signal processing circuit board is disposed in the second metal shell, and the BNC connector is disposed on the second metal shell. The capacitive bushing high-frequency partial discharge signal detection device of the invention has the advantages of excellent shielding performance, good anti-interference performance, safe and reliable use and high durability, and can effectively adapt to on-site environments.

The invention discloses a device for mounting and fixing a solar assembly in a plane. The device comprises a mounting surface plate, wherein a cross-shaped fixed base is fixed on the mounting surface plate; four straight edges of the fixed base are respectively provided with a cavity the side face and exterior of which are communicated; the four cavities are respectively internally provided with a fixing and limiting piece which can rotate respectively in each cavity; two ends of each fixing and limiting piece are respectively provided with threaded flanks; and after each fixing and limiting piece rotates by 90 degrees, the threaded flanks at two ends of each fixing and limiting piece are embedded in the side face of an aluminum alloy frame of the solar assembly. According to the invention, when the solar assembly is mounted and fixed in the plane direction, as long as the fixing and limiting piece is rotated, the threaded flanks at two end surfaces of the fixing and limiting piece are embedded in the side face of the aluminum alloy frame of the assembly, the effective fixing of the assembly can be realized, the device is simple and convenient to operate, any damaged assembly is convenient to replace, simultaneously mutual communication among each assembly is realized through the fixing and limiting piece, effective grounding of all assemblies can be realized, and the consumptions of lead wire materials and the working amount of mounting operators are reduced.

The invention discloses a separating device for a dangerous initiating explosive device assembly, belongs to the technical field of assembly, and solves the technical problem that an existing separating tool cannot safely disassemble the dangerous initiating explosive device assembly. The separating device comprises a fixing mechanism and a crimping screw ring dismounting mechanism, the dangerous initiating explosive device assembly comprises a dangerous initiating explosive device body and a first initiator; the dangerous initiating explosive device body is cylindrical; the first initiator is arranged on the first end face of the dangerous initiating explosive device body; the first trigger is arranged in the first trigger chamber, and the first trigger chamber is sleeved with a first fastening screw ring; the first crimping screw ring is used as an end cover to fix the first initiator in the first initiation chamber; the fixing mechanism is used for supporting the dangerous initiating explosive device body, the dangerous initiating explosive device body is fixed through the outer surface of the body, and the triggering chamber and the fastening screw ring are relatively fixed; and the screw ring dismounting mechanism is used for dismounting the first crimping screw ring, so that the first initiator is separated from the dangerous initiating explosive device body. According to the invention, safe separation of the initiator and the dangerous initiating explosive device body is realized, and accidents are prevented.

The invention discloses a small-size air purifier which comprises a shell, an electrostatic dust collection part, a contact agent module, a power supply module and a turbofan, wherein the electrostatic dust collection part, the contact agent module and the turbofan are sequentially arranged on the air path of the purifier; the electrostatic dust collection part is communicated with the contact agent module and an air inlet of the air path; a fan accommodating cavity is arranged on the outlet side of the contact agent module; an air duct opening communicated with an air outlet is formed in the fan accommodating cavity; the turbofan is fixed in the fan accommodating cavity; an air outlet pipe of the turbofan is plugged into the air duct opening; the power supply module comprises a circuit control board and a high-voltage generator; the circuit control board is arranged in the fan accommodating cavity and is connected with the high-voltage generator; the electrostatic dust collection part comprises a high-voltage sheet, a high-voltage wire fixing plate, an elastic piece and a high-voltage wire; and the high-voltage wire is wound on the high-voltage wire fixing plate and tensioned by the elastic piece. Electrostatic dust collection equipment, a contact agent and strong wind equipment are arranged in the air purifier; and furthermore, the small-size air purifier can realize a safe insulation structure in a small space to guarantee long-term safe operation of an electrostatic dust collector.

The invention provides a passenger car tread pattern. The passenger car tread pattern comprises a central pattern block, an outer transition area pattern block, an outer tire shoulder area pattern block, an inner transition area pattern block and an inner tire shoulder area pattern block; central outer side longitudinal pattern grooves are formed between the central pattern blocks and the outer transition area pattern blocks, and auxiliary transverse pattern grooves A are formed in the outer transition area pattern blocks; concave transverse grooves A are formed in the outer tire shoulder area pattern blocks; auxiliary transverse pattern grooves B are formed in the inner transition area pattern blocks; inner transition area transverse pattern grooves are formed in the inner transition area pattern blocks; concave transverse grooves B are formed in the inner tube shoulder area pattern blocks; inner tube shoulder auxiliary longitudinal pattern grooves are formed in the inner tube shoulder area pattern blocks, accumulated water in a grounding area in the running process of the tire can be effectively removed, and through the pattern blocks with different sizes in the transition area and the tire shoulder area and the staggered arrangement layout, the cooperative improvement of the rolling resistance and the gripping performance of the tire is achieved.