37results about How to "Maintenance-free operation" patented technology

A port on-site data acquiring, transmitting, sending and issuring system based on zigbee technology in the remote monitoring and controlling field of electromechanical equipment, comprises a wireless sensing network and a remote data server, wherein the wireless sensing network is distributed in a port working field, and can acquire working state data of the port field, collect the intra-network acquired data in a zigbee wireless manner, pack the collected data, and transmit to the remote data server via wired enterprise in-house network based on a transmission control protocol and an internetwork protocol. The remote data server can receive the data based on the transmission control protocol and the internetwork protocol, resolve the data according to the packed data transmission format, store the data in a database, and issue the data in a web service mode. The invention provides data support for monitoring application program development, failure pre-warning and equipment maintenance. In addition, the low-cost zigbee technology can reduce system complexity, and has good anti-interference performance, expandability and practicability.

A manipulator apparatus carries tools for connecting drillpipes to the drillstring in a wellbore on a drilling platform. A telescopically extendable horizontal work arm is carried on a telescopically extendable vertical column, and the tools are to be mounted on a free end of the work arm. The column is manually rotatable about a vertical axis. The column and the work arm are each respectively formed of a fixed element and a telescopically extendable element. The fixed element is preferably formed of two U-profile members arranged back-to-back, and the extendable element includes an H-profile member with its web received between the webs of the two U-profile members. This forms a telescopic slide bearing of the H-profile member sliding along the two U-profile members. The hydraulic cylinders are received in the recessed spaces of the profile members.

The invention relates to a giant magnctostrictivc material pressure sensor, which is characterized in that three giant magnctostrictivc material rods are vertically and evenly arranged on an inner circle of a sensor base and two permanent magnetic rods or two excitation windings are arranged vertically and systemically on three giant magnctostrictivc material rods; upper and lower disk magnetic inductive plates are respectively arranged on the above and at the bottom of the three giant magnctostrictivc material rods and the radiuses are a little bit bigger than the mounting radiuses of the permanent magnetic rods or the excitation windings; the magnetizing directions of the two permanent magnetic rods are axial and are the same; the two excitation windings have the same coiling direction and also the same current direction; the length of the permanent magnetic rods or the excitation windings is a little bit shorter than the length of the giant magnctostrictivc material rods to enable a gap between the top of permanent magnetic rods or the excitation windings and the bottom of the upper disk magnetic inductive plat; non-magnetic inductive glue is filled in the gaps to glue Hall units; inductive windings are coiled on the giant magnctostrictivc material rods; the upper disk magnetic inductive plate are arranged on a bearing block, the lower disk magnetic inductive plates are arranged on the base, an outer cover is arranged on the lower disk magnetic inductive plates, and encloses all parts on the base as a whole but the bearing block protrudes out of the upper surface of the outer cover.

The invention discloses a GIS bus cylinder telescopic joint displacement monitoring device and a GIS bus cylinder telescopic joint displacement monitoring method. The monitoring device comprises an ejector rod, a shell, a main control panel, a connecting block, a pressure spring and a positioning rod. The main control panel comprises a potentiometer, a control circuit, a temperature sensor, an acceleration sensor, a voltage reference source, a memory, a real-time clock, a positioning module, a wireless communication module, a power management circuit, a storage battery, a primary battery and a power interface. The potentiometer and a bus cylinder telescopic joint are linked, and the control circuit is used for measuring the stroke displacement amount of the potentiometer. According to the technical scheme of the invention, the parameters of the telescopic joint, including the displacement, the inclination, the vibration, the environment temperature and the like, can be automatically monitored, recorded and remotely transmitted.

A time synchronizing signal for synchronizing the times of wireless nodes capable of wireless communication is transmitted to the wireless nodes by multihop. Optional information is transferred by multihop from a predetermined wireless node to an optional node along the same path as the transfer path of the time synchronizing signal by the wireless nodes. Information to respond the optional information is transferred by multihop from the optional wireless node to the predetermined wireless node along the reverse path to the transfer path of the time synchronizing signal.

The invention discloses an inductive electricity obtaining device of a high-voltage transmission line. The inductive electricity obtaining device of the high-voltage transmission line comprises an equivalent power obtaining coil, a rectifying and voltage-stabilizing module, an overcurrent protecting module and a load matching module, wherein the equivalent power obtaining coil comprises nanocrystalline magnetic core power obtaining coils, which are connected in parallel. A plurality of wound and encapsulated nanocrystalline magnetic core power obtaining coils with fixed number of turns are connected in parallel to be used as a power obtaining magnetic core; each nanocrystalline magnetic core power obtaining coil is provided with a fixed iron core sectional area, number of turns of the coil, an average length of a magnetic path and an inner wire resistor R. The winding directions of all nanocrystalline magnetic core power obtaining coil are the same, so that the induced secondary currents are the same in phase. The inductive electricity obtaining device of the high-voltage transmission line, provided by the invention, is capable of increasing an effective magnetic core area by using a plurality of nanocrystalline magnetic core power obtaining coils, which are connected in series; under the circumstance that when a primary current is low, the power obtaining efficiency is improved and the output power is increased by increasing the number of the magnetic cores connected in parallel. At the same time, the electric transmission lines, which can obtain electricity through induction of a current sensor, are greatly increased and then the applicability of the device is improved.

A arm for spectacles (1, 50) comprises a first portion (11) made of polymer-based composite material reinforced with fibres and at least one film (23, 24) of thermoplastic polymeric material coupled to the first portion (11) as a covering for same.

A linear motion guide unit is provided which is downsized in size, maintenance-free for lubrication, and makes it possible to assemble easily and quickly the slider with accuracy. The end cap has outward end surfaces each of which is concaved to provide a first recess to fit over a lubricant applicator of porous compact to apply the rollers while running through the turnaround passages, and a second recess to fit over a retainer plate. The retainer plate is surrounded with a peripheral edge of the end cap and held in place with a snap-fit engagement with the end cap to squeeze the lubricant applicator inside the first recess in the end cap.

The invention discloses a speed giving driver controller of an electric locomotive. The speed giving driver controller comprises a non-contact angle sensor, a logic operation control unit, a speed control remover, a digital display tube and a buzzer, wherein the logic operation control unit is connected with the non-contact angle sensor, the speed control remover, the digital display tube and the buzzer respectively; and the logic operation control unit is further provided with an actual locomotive speed signal connector, a limited speed signal connector, an instruction signal output connector, and I-grade, II-grade and III-grade magnetic field weakening signal output connectors. The speed giving driver controller of the electric locomotive has the beneficial effects that the non-contact angle sensor is adopted and an instruction signal is stable; a fault caused by abrasion is avoided and maintenance-free operation can be realized; locomotive constant-speed giving is automatically controlled and the speed giving driver controller effectively guarantees that the locomotive can operate safely at the highest speed; magnetic weakening is automatically controlled; and after a speed control function is removed, all functions of a common driver controller can also be finished.

The invention relates to a turbofan-pressurized plug-flow aerator and belongs to the technology of sewage plug flow and oxygenation. The turbofan-pressurized plug-flow aerator comprises a turbofan shell, a motor which is hermetically connected with the upper end of the turbofan shell, a pressurizing turbine connected with the main shaft of the motor through a coupler, a propeller shaft fixedly connected with the pressurizing turbine and a protective hood, wherein the pressurizing turbine is arranged in the turbofan shell, the propeller shaft extends out of the lower end of the turbofan shell, the protective hood sheathes the propeller shaft and is hermetically connected with the lower end of the turbofan shell, one side of the turbofan shell is connected with an air inlet seat communicated with the inner cavity of the turbofan shell, the air inlet seat is provided with an air inlet hole, the propeller shaft is a hollow shaft pipe, a pressure air inlet hole is formed at the end close to the pressurizing turbine, and a plug flow aerating blade is arranged at the tail end of the propeller shaft. The turbofan-pressurized plug-flow aerator is low in equipment manufacturing cost and has higher oxygenation efficiency than foreign advanced equipment.

The invention relates to a remote control system of a wireless electronic display label, and particularly relates to a wireless electronic display label intelligent system for remote control of the Internet of Things. The remote control system structurally comprises a computer, a mobile phone and other service terminal devices that connected with the Internet through a wireless transmitting and receiving communication network, the wireless transmitting and receiving communication network is connected with an electronic display label, and the wireless transmitting and receiving communication network is connected with the electronic display label through the Internet. The remote control system of the wireless electronic display label provided by the invention can achieve Internet of Things interconnection, information interconnection, data interconnection, man-machine interconnection, data collection, data analysis, data management, data cloud, cloud data, remote control, remote management, unified management, intelligent management, precise tracking and positioning, and fast modification and intelligent update of display contents of the electronic display labels.

The invention discloses a swing arm machine for logistics sorting. The swing arm machine for logistics sorting comprises a bracket, a driving device, a crankshaft, a connecting rod and a push plate, wherein the driving device is arranged on the bracket; the crankshaft can be rotatably arranged on the bracket by taking one end as a center; the driving device drives one end of the crankshaft to be rotatably arranged; the connecting rod is rotatably connected to the crankshaft, and the crankshaft rotating drives the connecting rod to move; the push plate can be rotatably arranged by taking one end as a center, the connecting rod is connected to the push plate, and the connecting rod is driven by the crankshaft to move, so that the push plate rotates. The swing arm machine for logistics sorting disclosed by the invention is simple in structure, can push parcels to be sorted effectively, and realizes automatic operation.

The invention discloses a pretreatment device for raw water of an artificial wetland and a pretreatment process for raw water of the artificial wetland. Raw water of the artificial wetland enters the artificial wetland after being treated by the device. The pretreatment device comprises a barrel, an inlet, a spoiler, a deflecting plate, a vortex breaker, a drain outlet, a guide layer, an outlet and a dispensing opening; the barrel consists of an upper hollow cylinder I, a middle hollow inverted cone and a lower hollow cylinder II; and the inlet and the dispensing opening are formed in the top of the barrel, the drain outlet is formed in the bottom of the barrel, the spoiler, the deflecting plate and the vortex breaker are arranged on the inner wall of the barrel, and the outlet is formed in the side wall of the barrel. While the suspended particles in the water are separated, a function for removing the low content of ammonia and nitrogen in the raw water can be realized, so that the problem that the blockage is likely to happen when the sewage with relatively high content of suspended matters is treated for the existing artificial wetland can be efficiently solved.

A manipulator apparatus carries tools for connecting drillpipes to the drillstring in a wellbore on a drilling platform. A telescopically extendable horizontal work arm is carried on a telescopically extendable vertical column, and the tools are to be mounted on a free end of the work arm. The column is manually rotatable about a vertical axis. The column and the work arm are each respectively formed of a fixed element and a telescopically extendable element. The fixed element is preferably formed of two U-profile members arranged back-to-back, and the extendable element includes an H-profile member with its web received between the webs of the two U-profile members. This forms a telescopic slide bearing of the H-profile member sliding along the two U-profile members. The hydraulic cylinders are received in the recessed spaces of the profile members.

The invention provides a demagnetization device, in particular to a demagnetization device which has high reliability and is used for a water-turbine generator set. The device includes a three-phase full controlled rectifier bridge, a demagnetization switch, and a zinc oxide resistance which is connected with two ends of a generator rotor in parallel, wherein, the input terminal of the three-phase full controlled rectifier bridge is connected with the side edge of an excitation transformer; the original edge of the excitation transformer is connected with a generator stator end; and the output terminal of the three-phase full controlled rectifier bridge is connected with a generator rotor end by the demagnetization switch. The residual voltage of the zinc oxide resistance is smaller than the anode peak voltage at the AC side of the three-phase full controlled rectifier bridge. During normal demagnetization, the zinc oxide resistance is opened for demagnetization depending on the anode peak voltage of the three-phase full controlled rectifier bridge, and the demagnetization switch helijumps, therefore, no damage is caused to the contact thereof and an arc-extinguishing system, and the demagnetization without damage can be realized.

The invention discloses a miniature resonant-resistant three-phase outdoor composite insulation combination voltage transformer. Three voltage mutual inductors and a harmonic-elimination mutual inductors are arranged in the miniature resonant-resistant three-phase outdoor composite insulation combination voltage transformer, voltage mutual inductor primary winding coils are arranged on the voltagemutual inductors, a terminal of the primary winding coils of the three voltage mutual inductors is electrically connected with a primary terminal of the voltage transformer via a high-voltage fuse, the other end of the primary winding coils of the three voltage mutual inductors are connected in series to a coil terminal O of the harmonic-elimination mutual inductor, the other coil terminal N of the harmonic-elimination mutual inductor is connected to the primary terminal of the voltage transformer and is electrically and directly connected with ground for use, tail ends of secondary winding coils of the voltage mutual inductors are connected in series to a terminal o of the harmonic-elimination mutual inductor, protection winding coils of the voltage mutual inductors are sequentially connected in series in end-to-end way to form an opening triangle and a harmonic-elimination resistor is connected in series among openings of the opening triangle. By the miniature resonant-resistant three-phase outdoor composite insulation combination voltage transformer, the safety and the insulativity are greatly improved, three-phase unbalance and harmonic burnt-out phenomena are prevented, and miniature is achieved.

The invention discloses a material separating mechanism and a conveying system thereof for a bagged material and aims to solve the problems that an existing continuous packaging-proof device is big inequipment volume, relatively high in installing site requirements and has certain limitations. Based on structural improvement, the material separating mechanism and the conveying system thereof arelow in installing requirements of the site and has good adaptability. Meanwhile, according to the material separating mechanism and the conveying system thereof, through control over starting and stopping of a driving motor, the bagged material continuously arranged on a conveying line can be separated according to space designated by a control system, and reasonable space contributes to improvement of working efficiency of a stacking machine head. Meanwhile, through real-time feedback counting of a feeding end detecting sensor and a discharging end detecting sensor, the number of material bags on the current conveying line can be acquired; when the number reaches a certain limit value, a first conveying line is controlled to run at a reduced speed or shut down by the control system, and thus it is guaranteed that the number of bagged material bags on a conveying chain is within a reasonable range. By means of the material separating mechanism and the conveying system thereof for the bagged material, orderly and steady material separation of the bagged material can be achieved; and normal running of an automatic trucking loading system is guaranteed.

A linear motion guide unit is provided which is downsized in size, maintenance-free for lubrication, and makes it possible to assemble easily and quickly the slider with accuracy. The end cap has outward end surfaces each of which is concaved to provide a first recess to fit over a lubricant applicator of porous compact to apply the rollers while running through the turnaround passages, and a second recess to fit over a retainer plate. The retainer plate is surrounded with a peripheral edge of the end cap and held in place with a snap-fit engagement with the end cap to squeeze the lubricant applicator inside the first recess in the end cap.

The invention discloses a device for preventing vehicles from converse running on public roads and an application of the device to municipal roads, and is used for providing a municipal facility witha new structure. The device comprises a cover plate, linear guideways, a large gear and a barbed roller, wherein two parallelly-arranged bases are fixed in ground grooves, and the bases are the linearguideways; the linear guideways are connected with the barbed roller by a rack and pinion structure; resilient elements for resetting are arranged between the linear guideways and the bases or between the linear guideways and the ground grooves; when the resilient element are in a relaxed state, arc tops protrude out of first windows, and stabs are hidden in the ground grooves; after a pressing block is pressed down, the large gear and the barbed roller are driven to rotate, so that the stabs protrude out to be above the cover plate. According to the device, by setting the elastic coefficients of compression springs and leaf springs, the stabs protrude out only when a vehicle exceeding the designed weight passes the device, to force the vehicle to stop, the stabs do not protrude out whena non-motor vehicle passes, and thus the security is high.

The invention provides a gas introduction method for reinforced gas-liquid mass transfer. The key technology comprises that: a gas with pressure enters a gas inlet pipe of a gas-liquid reactor and a gas distribution pocket at the tail end of the gas inlet pipe, and the gas is rubbed with negative ion powder coatings coated on the inner walls of the gas inlet pipe and the gas distribution pocket or a filler coated with a negative ion powder coating on the outer surface in the gas inlet pipe in the flowing process of the gas, so that the gas is excited and a large amount of negative ions are accumulated; and the gas rich in the negative ions is jetted from a gas nozzle of an integrated fluid ultrasound whistle led out from the gas inlet pipe or the gas distribution pocket, and the ultrasonic wave produced when the gas passes through the fluid ultrasound whistle enters the surrounding reaction liquid and drives the surrounding reaction liquid to jointly enter a circular mixing cylinder so as to finish gas dispersion of ultrasonic wave and negative ion double reinforced mass transfer, wherein the circular mixing cylinder is arranged in back of the nozzle, the inner and outer walls of the circular mixing cylinder are coated with negative ion powder coatings, and an ultrasonic transducer is arranged on the outer wall or in the cavity of the circular mixing cylinder.

The invention belongs to the technical field of boiler smoke exhaust purification equipment, and particularly discloses a boiler smoke exhaust purification system. The boiler smoke exhaust purification equipment comprises a dust removal chamber and a desulfurization and denitrification chamber, wherein the upper part of the dust removal chamber and the upper part of the desulfurization and denitrification chamber communicate with each other through a smoke exhaust passage, the middle part of the dust removal chamber and the middle part of the desulfurization and denitrification chamber communicate with each other through an overflowing passage, a water supplementing pipe is arranged at the upper part of the dust removal chamber so as to keep the liquid level in the dust removal chamber atthe position of an overflowing passage opening, moreover, the liquid level in the desulfurization and denitrification chamber is kept not higher than the position of the overflowing passage opening, and an alkali supplementing liquid pipe is arranged at the upper part of the desulfurization and denitrification chamber. According to the boiler smoke exhaust purification system, dust removal and desulfurization and denitrification are carried out in a separated mode, therefore, the situations that an alkali liquor is wasted due to dust pollution to the alkali liquor and the precipitation is difficult to treat are avoided; dust deposits are independently removed through the dust removal chamber, a reaction precipitate is independently discharged through the desulfurization and denitrificationchamber, and different discharged products are separately treated, so that the effects of high-efficiency treatment and secondary pollution prevention are achieved.

The invention discloses a cyclone dust collector for doors of a material shed. The cyclone dust collector comprises the material shed, one side of the middle of the material shed is connected with a support, a cyclone separator is installed on the top of the support, the output end of the cyclone separator communicates with a first connecting pipe, one end of the first connecting pipe communicates with a dust collection pipe, the bottom of the dust collection pipe is connected with a first supporting frame, the other side of the middle of the material shed is connected with a draught fan, the output end of the draught fan communicates with a second connecting pipe, one end of the second connecting pipe communicates with an air outlet pipe, the bottom of the air outlet pipe is connected with a second supporting frame, the two sides of the air outlet pipe communicate with two exhaust pipes correspondingly, and the shed doors are installed on the two sides of the material shed correspondingly. According to the cyclone dust collector for the doors of the material shed, by arranging the cyclone separator, the dust collection pipe, the first supporting frame, a butterfly valve and a dust collection opening, the operation cost is greatly reduced; and by arranging the draught fan, the air outlet pipe, the exhaust pipes and a ventilation opening, dust at the doors can be better collected, and the dust removal effect is improved.

The present invention relates to a roller for a paper and / or carton machine. The roller comprises a rotating roller shell (2), and a stationary yoke (1), which axially passes through the roller shell (2). The roller shell is loaded by the pressure in a pressure chamber (8) radially outwards. The pressure chamber is connected with a pressure medium line (12) by a throttle point (10). The pressure chamber (8)is connected weith a pressure space (14) via a channel (13). The pressure space (14) has a variable volume. In order to realize excellent anti-shock effect when the frequency is high, the pressure space (14) has a maximum volume of 0.025 to 0.16 liters, and the channel (13) has another throttle (11).

The invention discloses a boiler smoke exhaust purification system, which includes a dust removal chamber and a desulfurization and denitrification chamber. The upper part between the dust removal chamber and the desulfurization and denitrification chamber communicates through a smoke exhaust channel, and the middle between the dust removal chamber and the desulfurization and denitrification chamber communicates through an overflow channel; and the upper part of the dust removal chamber is provided with a water supplying pipe, the liquid level in the dust removal chamber is maintained to be located on the position of an overflow channel opening, the liquid level in the desulfurization and denitrification chamber is maintained to be not higher than the position of the overflow channel opening, and the upper part of the desulfurization and denitrification chamber is provided with a lye supplying pipe. According to the boiler smoke exhaust purification system, dust removal and desulfurization and denitrification are conducted separately, and the problems that lye waste due to the fact that dust contaminates lye and precipitation is difficult to handle can be solved; and dust depositions are cleared independently through the dust removal chamber, the desulfurization and denitrification chamber is used for discharging reactive sediments independently, and different effluents are handled correspondingly, so that the action of efficient handling and secondary pollution prevention is achieved.

The invention discloses a flexible lifting system in order to solve the problem that an existing Z direction telescopic mechanical arm is high in installing field requirement and has certain limitation. The flexible lifting system comprises a conveying unit, a supporting base, driving units and a control system. At least two driving units exist, and the upper ends of the driving units are connected with the supporting base; and the lower ends of the driving units are connected with a stacking machine head. Based on the structural improvement, the flexible lifting system is low in field installing requirement, and has good applicability. Meanwhile, the driving units are arranged in a crossed manner, in combination with the conveying unit of a parallelogram structure, stable running of the stacking machine head can be effectively guaranteed; and based on feedback of a weighing sensor, and cooperation of the driving units, real-time detection and compensation on the lifting speed and position can be achieved, the purpose of synchronous lifting is achieved, and stable running of the stacking machine head is guaranteed. The flexible lifting system is simple in structure, ingenious in concept, reasonable in design and capable of running without maintenance in the later period.

The invention discloses a dual-channel radially distributed expandable mechanical seal device, which relates to the technical field of mechanical dynamic seals, including a shell, an inner ring, a ceramic seal ring and a flexible dynamic seal mechanism. A pair of liquid inlet and return expansion ports are arranged on the device, which are distributed at 180° with the original liquid inlet and return ports, so as to reduce the flow resistance and expand the flow capacity of the device, and the flow capacity is significantly increased. It will rotate, and the relative position of the inlet and return ports will change periodically. Therefore, in order to reduce the fluctuation of liquid flow during the rotation process; at the same time, there is a flexible dynamic seal structure inside the device. In order to improve the reliability and life of the flexible dynamic seal, it is necessary to select a suitable compound In addition to the flexible sealing form and installation structure, ceramic materials are sprayed on the surface of the matching metal parts to improve its hardness and wear resistance, and a set of dual-channel radial distribution systems that can adapt to harsh environments such as vibration, shock, and wide temperature range is provided. Expandable mechanical seal.

A time synchronizing signal for synchronizing the times of wireless nodes capable of wireless communication is transmitted to the wireless nodes by multihop. Optional information is transferred by multihop from a predetermined wireless node to an optional node along the same path as the transfer path of the time synchronizing signal by the wireless nodes. Information to respond the optional information is transferred by multihop from the optional wireless node to the predetermined wireless node along the reverse path to the transfer path of the time synchronizing signal.

The assembly type building climbing frame attachment point position reinforcing assembly comprises a rack assembly, a hydraulic driving assembly and a hydraulic expansion end, the hydraulic driving assembly is fixed to the surface of the rack assembly, and the output end of the hydraulic driving assembly is movably connected with the end of the hydraulic expansion end; the rack assembly comprises a building climbing frame positioning plate and a movement guide plate which are welded and fixed to each other, the movement guide plate is fixedly connected to the outer side of the hydraulic driving assembly in a sleeving mode, and a plurality of installation positioning holes are formed in the surface of the building climbing frame positioning plate. According to the device, a hydraulic expansion type joint structure is adopted, an electric hydraulic rod is used for driving a hydraulic expansion end to move in the radial direction towards the periphery under linkage of a linkage rod and a sliding connection lug, the outer wall of an external expansion joint block is firmly attached to the inner wall of a wall face installation hole, and firm installation of a whole pile foundation attachment point position is guaranteed; the expansion force can be increased in real time, so that the point position reinforcing effect is enhanced, and the fixing effect of the attached point position is improved.

The invention relates to an air cushion type headbox air flow control system with a high-pressure fan for blowing air. The air cushion type headbox air flow control system solves the problems that in the prior art, a Roots blower is large in noise and maintenance amount, engine oil needs to be replaced and cleaned regularly, and environmental pollution is caused. The system comprises a control cabinet, a display, operation and control all-in-one machine is installed on a cabinet door of the control cabinet, a PLC is installed in the control cabinet, the display, operation and control all-in-one machine is connected with the PLC through an Ethernet port, a first liquid level pressure sensor and a second liquid level pressure sensor on a headbox are connected with the PLC, a high-pressure fan is connected with the PLC, and the high-pressure fan is connected with the PLC. A variable-frequency governor of the high-pressure fan is arranged in the control cabinet, the high-pressure fan is connected with the headbox, and the sizing pump motor and the frequency converter are connected with the PLC.

The invention relates to an overspeed automatic brake system of a mining endless rope winch. Error braking or brake failures are prone to happening in existing tramcar brake. Thus, the overspeed automatic brake system of the mining endless rope winch comprises a brake mechanism and a bidirectional centrifugal overspeed clutch brake trigger device. The bidirectional centrifugal overspeed clutch brake trigger device comprises a large chain wheel, a chain, a rotating shaft, a fixed disc and a moving disc. A pulley disc is further hinged to the middle of a frame of the matched winch. A horizontalsupporting rod is fixedly connected to the center of the pulley disc, and clamping jaws are supported on the two sides of the horizontal supporting rod correspondingly. Rope grooves are formed in theouter circumferences of the fixed disc and the pulley disc, and a steel wire rope and a fixed pulley are arranged between the fixed disc and the pulley disc. The pulley disc is provided with a torsional spring or reset spring. The center extending line of the steel wire rope connected with the outer edge of the fixed disc right passes through one point on the axis of the fixed disc. The overspeedautomatic brake system is suitable for coal mine common rail transportation, is high in brake safety, easy to use and high in reliability and can be used in a coal mine on a large scale.