CN106698147B - A kind of deep-well lifting system intelligence anti-drop method and device - Google Patents

Abstract

The invention discloses an intelligent anti-falling method and device for a deep well hoisting system. The intelligent anti-falling method includes: uniformly arranging an electromagnetic retarder along the inner wall of the shaft, and the electromagnetic retarder includes a permanent magnet retarder and a mechanical transmission device , speed sensor, controller, manual switch, permanent magnet retarder includes a magnet bracket set on the inner wall of the shaft, the magnet bracket is composed of a shielding layer and a magnetic pole piece, and moves along the lifting container on the magnet bracket Several permanent magnets are arranged at intervals in the direction, and the permanent magnets are bonded to each other through non-magnetic blocks to form a permanent magnet combination. The mechanical transmission device is connected to the permanent magnet combination, so that the permanent magnet combination can move horizontally on the magnet bracket. A mechanical grabbing device is connected to the lifting container. The invention slows down the lifting container through the permanent magnet retarder and at the same time adopts the anti-falling device to carry out mechanical capture, the brake is stable, the capture is reliable, and the safety factor of the deep well hoisting equipment is improved.

Description

An intelligent fall prevention method and device for a deep well hoisting system

technical field

The invention belongs to the technical field of anti-falling of deep well hoisting systems, and in particular relates to an intelligent anti-falling method and device for deep well hoisting systems combining a permanent magnet retarder and a traditional mechanical anti-falling device.

Background technique

In recent years, with the rapid development of the coal industry, my country's requirements for coal mine safety have become more and more stringent, but the mining industry is still one of the high-risk industries. Among them, the deep well hoisting equipment is an important equipment connecting the underground and the ground. Once a falling object accident occurs in the deep well hoisting system, it will cause casualties, and it will also be accompanied by a series of problems such as equipment damage, production interruption, and delays in the construction period, which will seriously affect mine production activities. Work properly. During the operation of the deep well hoisting system, falling objects may be caused by broken hoisting wire ropes, illegal operations, imperfect safety facilities, inadequate maintenance, misoperation of safety facilities, and failure of the control system. At this time, the anti-drop system is the only effective means that can make the lifting container stop smoothly and ensure the safety of staff and transportation equipment. Therefore, designing a safe and reliable anti-drop system has important practical significance for reducing the occurrence of falling object accidents and improving the safety of the coal mine industry.

Installing a fall arrester in the deep well hoisting system is the main safety protection measure for hoisting equipment at home and abroad. With the promotion and application of various types of fall arresters, the occurrence of mine accidents has been effectively reduced to a certain extent, but mine hoisting equipment accidents still exist. At present, there are three types of fall arresters commonly used in various mines, namely FS type fall arrester, GS type fall arrester and BF type fall arrester. These three kinds of fall arresters are composed of catchers installed on the lifting container, buffers installed on the derrick, buffer ropes, brake ropes, connectors, and tensioning devices. The difference is mainly the difference of the catcher.

The FS type fall arrester is designed by Shenyang Coal Mine Design and Research Institute based on the Soviet Union's "broken rope safety device". It adopts a lever sliding wedge arresting mechanism. The wedge moves upwards and clings to the brake rope. There is friction between the wedge and the brake rope, and the friction increases continuously until the brake rope is fully grasped, finally realizing the braking of the lifting container. It has the advantages of sensitive action and reliable capture, etc. Advantages, but the recovery process after capture is difficult, there are many misoperations, and the structure is complex and heavy.

The GS type anti-fall device adopts the eccentric lever brake shoe arresting mechanism. When the hoisting wire rope breaks suddenly, the spring stretches, and the eccentric lever rotates through the transmission mechanism, and the two brake shoes gradually approach until the main brake rope is stuck. The braking effect has the advantages of light weight, easy reset, more safety and reliability, etc., but the wear is serious, and parts need to be replaced regularly.

The BF type fall arrester adopts a rolling friction wedge-shaped arresting mechanism. When the lifting wire rope breaks suddenly, the extension spring contracts, and the transmission mechanism makes the two sliding wedges move upwards at the same time and stick to the brake rope. There is a gap between the wedge and the brake rope. The friction force makes the wedge continue to move upward until the brake rope is fully grasped, realizing the capture of the falling lifting container. It has the advantages of simple structure, light weight, reliable capture, convenient reset, high safety factor, long service life of parts and maintenance Convenience and other advantages, but during the braking process, due to the inertial effect, the lifting container will generate a large vibration, and in the event of a speeding accident (winch control system failure), no effective braking action can be produced.

The above-mentioned anti-dropping devices all use mechanical transmission to make the brake shoes or wedges close to the brake rope, and use the friction generated between the two to achieve the braking effect. It belongs to mechanical arrest, which has large wear and tear, and the tension spring is broken. There are problems such as large vibration during driving and long braking distance.

At present, magnetic retarders are mostly used in the braking system of heavy trucks, including electromagnetic retarders and permanent magnet retarders.

The electromagnetic retarder is a kind of magnetic retarder widely used in the automotive field. The electromagnetic coil is installed on the stator, and the excitation and braking torque of the electromagnetic retarder are controlled by controlling the power on and off of the stator winding and the magnitude of the current. , has the advantages of simple structure, low production cost, wide range of braking torque, fast response time, low working noise, adjustable braking torque, low failure rate, and convenient maintenance; but the electromagnetic retarder is through the electromagnetic coil Excitation, the coil heats up seriously, which is easy to cause thermal decay (the braking torque decreases and the braking distance becomes longer due to the coil heating due to the long braking time or large braking torque), high energy consumption, and the battery needs to be discharged after rapid discharge. Long-term charging, long recovery time and frequent high-power discharge of the battery will reduce the service life and increase maintenance costs, which is not energy-saving and environmentally friendly.

The permanent magnet retarder uses its own permanent magnet to generate a magnetic field, controls the position of the permanent magnet through mechanical transmission to control the excitation path, thereby controlling the change of the braking torque, and overcomes the problems of high energy consumption and thermal decay of the electromagnetic retarder. , The permanent magnet retarder adopts high-performance NdFeB permanent magnets for excitation, no power supply is required, the permanent magnet itself does not generate heat, there is no thermal fading phenomenon, no need to be equipped with batteries, it is easy to achieve lightweight, stable excitation, and braking torque Stablize.

At present, the magnetic retarder is widely used in the transportation industry, and there is no anti-fall device and method combining the magnetic retarder and the anti-fall device to protect the safety of the deep well hoisting system in the market.

Contents of the invention

Purpose of the invention: The purpose of the invention is to solve the defects of the prior art and provide an intelligent anti-fall method and device for a deep well hoisting system that combines a permanent magnet retarder with an existing anti-fall device.

In order to achieve the above object, the present invention adopts the following technical solution: an intelligent anti-drop method for a deep well hoisting system, the deep well hoisting system includes a lifting container arranged in the shaft, and the intelligent anti-fall method includes:

The electromagnetic retarder is evenly arranged along the inner wall of the shaft, and the electromagnetic retarder includes a permanent magnet retarder, a mechanical transmission device, a speed sensor, a controller, and a manual switch. The magnet bracket is composed of a shielding layer and a magnetic pole piece, the shielding layer is a non-magnetic material, and the magnetic pole piece is a magnetic material. On the magnet bracket, several permanent magnets are arranged at intervals along the moving direction of the lifting container. And the polarities of two adjacent permanent magnets are opposite, and the permanent magnets are bonded to each other through non-magnetic conductive blocks to form a permanent magnet combination. On one side of the inner wall of the wellbore, a plurality of the same permanent magnet combinations are evenly arranged in the transverse direction. The opposite side of the inner wall of the wellbore is also symmetrically arranged with the same number of permanent magnet combinations. The mechanical transmission device is mainly composed of a motor, a reduction box and a gear. The combination is connected by rack and pinion. The motor drives the gear to rotate, so that the permanent magnet combination can move horizontally on the magnet bracket. When the permanent magnet combination is aligned with the pole piece, the magnetic induction line of the adjacent permanent magnet passes through the pole piece. A loop is formed. At this time, the permanent magnet is in the working position. When the permanent magnet combination and the pole pieces are staggered from each other, the magnetic induction line of the permanent magnet is shielded by the shielding layer. At this time, the permanent magnet is in the shielding position. The speed sensor is connected to the controller. The speed sensor is used for Monitor the running speed of the lifting container in real time and send a speed signal to the controller. The controller is used to analyze and process the speed signal and send a control signal to the motor. The handle of the manual switch is directly connected to the motor, which is used to manually control the combination of permanent magnets Horizontal movement on the magnet bracket; at the same time, the mechanical catch device is connected with the lifting container, and the mechanical catch device is a BF type fall arrester;

Automatic anti-drop control: The speed sensor monitors the running speed of the lifting container in real time, and converts the speed signal into an electrical signal and outputs it to the controller. The controller analyzes and processes the signal of the speed sensor. Or when the running speed of the lifting container exceeds the safe range, the controller sends an action command to the mechanical transmission device, and the mechanical transmission device drives the permanent magnet to leave the shielding position and enter the working position to generate a magnetic field, so that the lifting container can cut the magnetic induction line in the magnetic field. The movement generates a torque that hinders the continuous movement of the lifting container, and realizes the slow control of the lifting container; when the lifting wire rope breaks suddenly and causes a well accident, the BF type fall arrester automatically realizes stable and reliable arrest of the lifting container;

Manual anti-drop control: When the hoisting wire rope breaks suddenly and causes a well fall accident, the manual switch installed inside the hoisting container sends an action command to the mechanical transmission device, and the mechanical transmission device drives the permanent magnet to leave the shielding position and enter the working position to generate a magnetic field , so that the lifting container moves to cut the magnetic induction line in the magnetic field, and generates a torque that hinders the continuous movement of the lifting container, so as to realize the slow control of the lifting container; at the same time, the BF type anti-fall device automatically realizes the stable and reliable grasp of the lifting container catch.

An intelligent anti-falling device for a deep well hoisting system, the deep well hoisting system includes a lifting container arranged in the shaft, the intelligent anti-falling device includes an electromagnetic retarder and a mechanical arresting device;

The electromagnetic retarder is evenly arranged along the inner wall of the shaft, and includes a permanent magnet retarder, a mechanical transmission device, a speed sensor, a controller, and a manual switch. The permanent magnet retarder includes a magnet bracket arranged on the inner wall of the shaft. The magnet bracket is composed of a shielding layer and a magnetic pole piece. The shielding layer is a non-magnetic material, and the magnetic pole piece is a magnetic material. On the magnet bracket, several permanent magnets are arranged at intervals along the moving direction of the lifting container, and two adjacent The polarities of the two permanent magnets are opposite, and the permanent magnets are bonded to each other through non-magnetic blocks to form a permanent magnet combination. On one side of the inner wall of the wellbore, a plurality of the same permanent magnet combinations are evenly arranged in the lateral direction, and on the opposite side of the inner wall of the wellbore. One side is also symmetrically arranged with the same number of permanent magnet combinations. The mechanical transmission device is mainly composed of a motor, a gearbox and a gear. The output shaft of the motor is connected to the gearbox, and the output shaft of the gearbox is connected to the gear. The rack and pinion meshing connection, the motor drives the gear to rotate, so that the permanent magnet combination can move horizontally on the magnet bracket. When the permanent magnet combination is aligned with the pole piece, the magnetic induction lines of adjacent permanent magnets pass through the pole piece to form a loop. When the permanent magnet is in the working position, when the permanent magnet combination and the magnetic pole piece are staggered, the magnetic induction line of the permanent magnet is shielded by the shielding layer. At this time, the permanent magnet is in the shielding position, and the speed sensor is connected to the controller. Real-time monitoring of the operating speed and sending speed signals to the controller. The controller is used to analyze and process the speed signals and send control signals to the motor. The handle of the manual switch is directly connected to the motor for manual control. horizontal movement;

The mechanical catching device is connected with the lifting container, and the mechanical catching device is a BF type fall arrester.

Further, the permanent magnet is an NdFeB permanent magnet.

Further, the BF type fall arrester includes a tensioning device, a catcher, a brake rope, a connector, a buffer, and a buffer rope. The lower end of the brake rope is connected to the top of the lifting container, and the upper end of the brake rope passes through the catch The rolling friction wedge-shaped catch mechanism of the device is connected to the lower end of the buffer rope through a connector, and the upper end of the buffer rope passes through the buffer to connect with the upper roller of the lifting system. The tensioning device is arranged at the bottom of the shaft, and the tensioning device passes through The rope is connected with the bottom of the lifting container, and is used to generate a certain tension force to tighten the braking rope.

Beneficial effects: the present invention is an intelligent anti-falling device for a deep well hoisting system based on the combination of a permanent magnet retarder and an existing anti-falling device. The permanent magnet retarder slows down the lifting container while using the anti-falling device Carry out mechanical capture, reduce the working pressure and wear of the mechanical fall arrester, greatly prolong the service life of the equipment, brake smoothly, greatly shorten the braking distance, convenient maintenance and repair, energy saving and environmental protection, reliable capture, and overspeed operation of the lifting system It can also be effectively controlled, improving the safety factor of deep well hoisting equipment.

Description of drawings

Fig. 1 is the assembly structure schematic diagram of the present invention;

Fig. 2 is a top view of the structure of the permanent magnet retarder in a non-working state;

Fig. 3 is the sectional view of the dotted line A position in Fig. 2;

In the figure, 1. Tensioning device, 2. Permanent magnetic retarder, 3. Lifting container, 4. Catcher, 5. Brake rope, 6. Connector, 7. Buffer, 8. Buffer rope, 21, non-magnetic block, 22, permanent magnet, 23, magnetic pole piece, 24, gear, 25, motor, 26, reduction box, 27, shielding layer.

Detailed ways:

The present invention will be further explained below in conjunction with the accompanying drawings.

As shown in Figures 1 to 3, a deep well hoisting system intelligent anti-falling method of the present invention, the deep well hoisting system includes a lifting container 3 arranged in the shaft, the intelligent anti-falling method includes:

The electromagnetic retarder is evenly arranged along the inner wall of the shaft, and the electromagnetic retarder includes a permanent magnet retarder 2, a mechanical transmission device, a speed sensor, a controller, and a manual switch. The permanent magnet retarder 2 includes a The magnet bracket on the inner wall, the magnet bracket is formed by the embedding combination of the shielding layer 27 and the magnetic pole piece 23, the shielding layer 27 is a non-magnetic material, and the magnetic pole piece 23 is a magnetic material, on the magnet bracket along the direction of movement of the lifting container 3 Several permanent magnets 22 are arranged at intervals, and the polarities of two adjacent permanent magnets 22 are opposite. The permanent magnets 22 are bonded to each other through the non-magnetic conductive block 21 to form a permanent magnet combination, which is along the lateral direction on one side of the inner wall of the wellbore. A plurality of the same permanent magnet combinations are evenly arranged, and the same number of permanent magnet combinations are also symmetrically arranged on the opposite side of the inner wall of the wellbore. The mechanical transmission device is mainly composed of a motor 25, a reduction box 26 and a gear 24. The box 26 is connected, and the output shaft of the reduction box 26 is connected with the gear 24. The gear 24 and the permanent magnet combination are connected by rack and pinion meshing. The motor 25 drives the gear 24 to rotate, so that the permanent magnet combination can be moved horizontally on the magnet bracket. When the permanent magnet combination was aligned with the pole piece 23, the magnetic induction lines of the adjacent permanent magnets 22 passed through the pole piece 23 to form a loop. At this time, the permanent magnet 22 was in the working position. 22. The magnetic induction line is shielded by the shielding layer 27. At this time, the permanent magnet 22 is in the shielding position, and the speed sensor is connected to the controller. The speed sensor is used to monitor the running speed of the lifting container 3 in real time and send a speed signal to the controller. The controller uses In order to analyze and process the speed signal and send a control signal to the motor 25, the handle of the manual switch is directly connected to the motor 25, which is used to manually control the permanent magnet assembly to move horizontally on the magnet bracket; at the same time, the mechanical catch device is connected to the lifting container 3 , the mechanical arresting device is BF type fall arrester;

Automatic anti-fall control: The speed sensor monitors the running speed of the lifting container 3 in real time, and converts the speed signal into an electrical signal and outputs it to the controller. The controller analyzes and processes the signal of the speed sensor. In an accident or when the operating speed of the lifting container 3 exceeds the safe range, the controller sends an action command to the mechanical transmission device, and the mechanical transmission device drives the permanent magnet 22 to leave the shielding position and enter the working position to generate a magnetic field, so that the lifting container 3 is cut in the magnetic field The movement of the magnetic induction line produces a torque that hinders the continuous movement of the lifting container 3, and realizes the slow speed control of the lifting container 3; when the lifting wire rope suddenly breaks and causes a well accident, the lifting container is automatically realized through the BF type fall arrester. Stable and reliable capture;

Manual anti-drop control: When the hoisting wire rope breaks suddenly and causes a well fall accident, the manual switch installed inside the hoisting container 3 sends an action command to the mechanical transmission device, and the mechanical transmission device drives the permanent magnet 22 to leave the shielding position and enter the working position. Generate a magnetic field to make the lifting container 3 cut the magnetic induction line in the magnetic field, generate a torque that hinders the continuous movement of the lifting container 3, and realize the slow speed control of the lifting container 3; at the same time, the BF type anti-fall device automatically realizes the lifting of the container. Smooth and reliable capture.

As shown in Figures 1 to 3, an intelligent anti-fall device for a deep well hoisting system of the present invention includes a lifting container 3 arranged in the shaft, and the intelligent anti-fall device includes an electromagnetic slowing device and a mechanical arresting device .

The electromagnetic retarder is evenly arranged along the inner wall of the shaft, and includes a permanent magnet retarder 2, a mechanical transmission, a speed sensor, a controller, and a manual switch. The permanent magnetic retarder 2 includes a magnet arranged on the inner wall of the shaft The bracket and the magnet bracket are formed by embedding and combining the shielding layer 27 and the magnetic pole piece 23. The shielding layer 27 is a non-magnetic conductive material, and the magnetic pole piece 23 is a magnetic conductive material. Permanent magnets 22, the permanent magnets 22 are NdFeB permanent magnets, and the polarities of two adjacent permanent magnets 22 are opposite, and the permanent magnets 22 are bonded to each other through the non-magnetic block 21 to form a permanent magnet combination. One side of the inner wall is evenly arranged with multiple permanent magnet combinations along the transverse direction, and the same number of permanent magnet combinations are also symmetrically arranged on the opposite side of the inner wall of the shaft. The mechanical transmission device is mainly composed of a motor 25, a reduction box 26 and a gear 24 The output shaft of the motor 25 is connected with the reduction box 26, the output shaft of the reduction box 26 is connected with the gear 24, and the gear 24 and the permanent magnet combination are connected by rack and pinion meshing, and the gear 24 is driven by the motor 25 to rotate, so that the permanent magnet combination Move horizontally on the magnet support, when the permanent magnet combination is aligned with the magnetic pole piece 23, the magnetic field lines of the adjacent permanent magnet 22 pass through the magnetic pole piece 23 to form a loop, and now the permanent magnet 22 is in the working position. When the sheets 23 were staggered mutually, the magnetic induction lines of the permanent magnet 22 were shielded by the shielding layer 27, and now the permanent magnet 22 was in the shielding position, and the speed sensor was connected to the controller, and the speed sensor was used for real-time monitoring and reporting to the operating speed of the detection lifting container 3. Controller sends speed signal, and controller is used for analyzing and processing speed signal and sends control signal to motor 25, and the handle of manual switch directly links to each other with motor 25, is used for manual control permanent magnet assembly and moves horizontally on the magnet support.

The mechanical catching device is connected to the lifting container 3, and the mechanical catching device is a BF type fall arrester. The BF type fall arrester includes a tensioning device 1, a catcher 4, a brake rope 5, a connector 6, a buffer 7, and a buffer rope 8. The lower end of the brake rope 5 is connected to the top of the lifting container 3, and the brake rope The upper end of 5 passes through the rolling friction wedge-shaped catch mechanism of catcher 4, and then connects with the lower end of buffer rope 8 through connector 6, and the upper end of buffer rope 8 passes through buffer 7 to connect with the roller at the top of the lifting system, and the tensioning device 1 Arranged at the bottom of the shaft, the tensioning device 1 is connected to the bottom of the lifting container 3 through a tensioning rope, and is used to generate a certain tensioning force to tighten the braking rope 5 . The brake rope 5 is the main support element of the BF type fall arrester, and the specific number and size of the brake rope 5 should be selected according to the actual working conditions.

During the lifting process, the extension spring in the rolling friction wedge-shaped catch mechanism of the catcher 4 is in a stretched state, and the brake rope 5 can pass through freely. Once the lifting wire rope breaks, the extension spring shrinks, so that the two sliding wedges can Move upward and clamp the brake rope 5, so that the brake rope 5 is subject to a vertically upward and gradually increasing frictional resistance, and the force on the brake rope 5 is transmitted to the buffer rope 8 through the connector 6, and the buffer rope passes through The kinetic energy of the lifting container 3 is consumed by the bending deformation resistance and frictional resistance generated by the shock absorber, and the stable and reliable capture of the lifting container 3 is finally realized.

The above is only a preferred embodiment of the present invention, it should be pointed out that, for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications can also be made. It should be regarded as the protection scope of the present invention.

Claims (4)

1. An intelligent anti-falling method for a deep well hoisting system, the deep well hoisting system comprising a lifting container (3) arranged in the shaft, the intelligent anti-falling method comprising: The electromagnetic retarder is evenly arranged along the inner wall of the shaft, and the electromagnetic retarder includes a permanent magnet retarder (2), a mechanical transmission device, a speed sensor, a controller, a manual switch, and a permanent magnet retarder (2) It includes a magnet bracket arranged on the inner wall of the shaft. The magnet bracket is formed by embedding and combining the shielding layer (27) and the magnetic pole piece (23). The shielding layer (27) is a non-magnetic material, and the magnetic pole piece (23) is a magnetic conductivity material, several permanent magnets (22) are arranged at intervals along the moving direction of the lifting container (3) on the magnet bracket, and the polarities of two adjacent permanent magnets (22) are opposite, and the permanent magnets (22) are passed through non-magnetic conductive blocks (21) mutual bonding into a permanent magnet combination, a plurality of identical permanent magnet combinations are evenly arranged along the lateral direction on one side of the inner wall of the wellbore, and the same number of permanent magnet combinations are also symmetrically arranged on the opposite side of the inner wall of the wellbore, The mechanical transmission device is mainly composed of a motor (25), a reduction box (26) and a gear (24). The output shaft of the motor (25) is connected with the reduction box (26), and the output shaft of the reduction box (26) is connected with the gear (24). The gear (24) and the permanent magnet combination are connected by rack and pinion meshing, and the motor (25) drives the gear (24) to rotate, so that the permanent magnet combination can move horizontally on the magnet bracket. When the permanent magnet combination is aligned with the pole piece During (23), the magnetic induction lines of adjacent permanent magnets (22) pass through the magnetic pole piece (23) to form a loop, and now the permanent magnet (22) is in the working position, and when the permanent magnet combination and the magnetic pole piece (23) are staggered mutually, The magnetic induction line of the permanent magnet (22) is shielded by the shielding layer (27). At this time, the permanent magnet (22) is in the shielding position, and the speed sensor is connected to the controller. The speed sensor is used for real-time monitoring of the operating speed of the lifting container (3). And send the speed signal to the controller, the controller is used to analyze and process the speed signal and send the control signal to the motor (25), the handle of the manual switch is directly connected with the motor (25), and is used to manually control the combination of the permanent magnet on the magnet bracket to do Move horizontally; at the same time, connect the mechanical catch device with the lifting container (3), and the mechanical catch device is a BF type fall arrester; Automatic anti-drop control: The speed sensor monitors the running speed of the lifting container (3) in real time, and converts the speed signal into an electrical signal and outputs it to the controller. The controller analyzes and processes the signal of the speed sensor. In a well fall accident or when the operating speed of the lifting container (3) exceeds the safe range, the controller sends an action command to the mechanical transmission device, and the mechanical transmission device drives the permanent magnet (22) to leave the shielding position and enter the working position to generate a magnetic field, so that the lifting container (3) Cutting the magnetic induction line in the magnetic field produces a torque that hinders the continuous movement of the lifting container (3), so as to realize the slow speed control of the lifting container (3); when the lifting wire rope breaks suddenly and causes a well accident, The stable and reliable capture of the lifting container is automatically realized through the BF type fall arrester; Manual anti-drop control: When the hoisting wire rope breaks suddenly and causes a well fall accident, the manual switch installed inside the hoisting container (3) sends an action command to the mechanical transmission device, and the permanent magnet (22) is driven away from the shielding position by the mechanical transmission device Enter the working position and generate a magnetic field, so that the lifting container (3) can cut the magnetic induction line in the magnetic field, and generate a torque that hinders the continuous movement of the lifting container (3), so as to realize the slow speed control of the lifting container (3); at the same time, through The BF type fall arrester automatically realizes the stable and reliable capture of the lifting container. 2. An intelligent anti-falling device for a deep well hoisting system, the deep well hoisting system includes a lifting container (3) arranged in the shaft, characterized in that: the intelligent anti-falling device includes an electromagnetic retarder and a mechanical arresting device; The electromagnetic retarder is evenly arranged along the inner wall of the wellbore, and includes a permanent magnet retarder (2), a mechanical transmission, a speed sensor, a controller, and a manual switch. The permanent magnet retarder (2) includes a The magnet bracket on the inner wall, the magnet bracket is formed by the embedding combination of the shielding layer (27) and the magnetic pole piece (23), the shielding layer (27) is a non-magnetic material, and the magnetic pole piece (23) is a magnetic material. Several permanent magnets (22) are arranged at intervals along the moving direction of the lifting container (3) on the support, and the polarities of two adjacent permanent magnets (22) are opposite, and the permanent magnets (22) are mutually connected by non-magnetic conductive blocks (21). It is bonded into a permanent magnet combination, and a plurality of the same permanent magnet combinations are evenly arranged along the lateral direction on one side of the inner wall of the wellbore, and the same number of permanent magnet combinations are also symmetrically arranged on the opposite side of the inner wall of the wellbore. The mechanical transmission device mainly Composed of motor (25), reduction box (26) and gear (24), motor (25) output shaft is connected with reduction box (26), reduction box (26) output shaft is connected with gear (24), gear (24) The rack and pinion meshes with the permanent magnet combination, and the motor (25) drives the gear (24) to rotate, so that the permanent magnet combination can move horizontally on the magnet bracket. When the permanent magnet combination is aligned with the pole piece (23) , the magnetic induction lines of adjacent permanent magnets (22) pass through the magnetic pole piece (23) to form a loop, and now the permanent magnet (22) is in the working position, when the permanent magnet combination and the magnetic pole piece (23) are staggered mutually, the permanent magnet (22 ) The magnetic induction line is shielded by the shielding layer (27), and now the permanent magnet (22) is in the shielding position, the speed sensor is connected to the controller, and the speed sensor is used for real-time monitoring of the operating speed of the detection lifting container (3) and reports to the controller Send a speed signal, the controller is used to analyze and process the speed signal and send a control signal to the motor (25), the handle of the manual switch is directly connected to the motor (25), and is used to manually control the permanent magnet assembly to move horizontally on the magnet bracket; The mechanical catching device is connected to the lifting container (3), and the mechanical catching device is a BF type fall arrester. 3. The intelligent anti-drop device for deep well hoisting system according to claim 2, characterized in that, the permanent magnet (22) is an NdFeB permanent magnet. 4. A deep well hoisting system intelligent anti-falling device according to claim 2, characterized in that the BF type anti-falling device comprises a tensioning device (1), a catcher (4), a brake rope (5 ), connector (6), buffer (7), buffer rope (8), the lower end of the brake rope (5) is connected to the top of the lifting container (3), and the upper end of the brake rope (5) passes through the catcher (4 ) of the rolling friction wedge-shaped catch mechanism and then connect to the lower end of the buffer rope (8) through the connector (6), and the upper end of the buffer rope (8) passes through the buffer (7) to connect with the roller at the top of the lifting system, and the tensioning device (1) Arranged at the bottom of the shaft, the tensioning device (1) is connected to the bottom of the lifting container (3) through a tensioning rope, and is used to generate a certain tensioning force to tighten the braking rope (5).