36results about How to "No loss of control" patented technology

An energy-saving air conditioner supplying fresh air is disclosed. Its outdoor unit has air filter, fresh air chamber, fresh air fan, air exhaust fan, air exhaust chamber and electric control window.Its indoor unit has heat exchanger, air filter, and air cleaner. The 70% of cold or heat is exchanged between indoor air and fresh air. After exchange, the indoor air is exhausted out and fresh air comes into room. Its advantages include large heat exchange area, high efficiency and low noise.

The invention discloses an aluminum-containing cold forging steel smelting process, comprising the steps of blast furnace molten iron making, processing by a converter, refining and continuous casting, wherein requirements of molten iron are as follows: P is not more than 0.10%, Si is not more than 0.50% and not less than 0.30%, S is not more than 0.030%; requirements in converter refining are as follows: CaO is not less than 85%, activity degree is not less than 280 and SiO2 in fluorite is not more than 6%; low-Si pre-melted slag or refining agent replaces partial CaO and fluorite in a converter steel discharging process for rapid slag making, a refining furnace deoxidizing agent is applicable to slag deoxidization after stirring calcium carbide and aluminum particles, and Si-containing material is prohibited; during continuous casting, pure Ca lines are applicable between a medium packet impact zone and various flows, so that calcium aluminate which is low in melting point and is from reaction of Al2O3 generated from medium packet through secondary oxidation and Ca floats and is removed. The process can reduce the content of Si in steel, improve Al content and guarantee continuous pouring of molten steel.

The invention discloses a multifunctional intelligent nozzle structure used by a dry powder extinguisher. The multifunctional intelligent nozzle structure comprises a valve body, an inflation pressing valve, a pressure meter connecting head and a thermosensitive valve; a powder spraying pipe is arranged at the upper end of the valve body, and a connecting port is formed in the lower end of the valve body; a pressure meter joint is formed in one side of the valve body and an inflation pressing port is formed in the other side of the valve body; the pressure meter joint of the valve body is connected with a pressure meter through the pressure meter connecting head; the inflation pressing port of the valve body is connected with the inflation pressing valve; and the valve body is connected with an outlet of the dry powder extinguisher through a connecting port. The thermosensitive valve coats the powder spraying pipe, and is welded with the powder spraying pipe through tin soldering; and when the temperature of the thermosensitive valve reaches the melting temperature of tin soldering, the thermosensitive valve is deviated from the powder spraying pipe under the effect of pressure, and dry powder is sprayed out from the dry powder extinguisher for automatic fire extinguishing. The multifunctional intelligent nozzle structure is high in reliability without generating wrong control and control failure, prevents fire, can timely extinguish the fire, and prevents and reduces the fire loss.

The invention discloses a control system and method for a laser radar galvanometer servo motor. The system comprises an upper computer, a drive control digital module, a three-loop control analog module, a high-frequency pulse laser front end and a scanning galvanometer, and the drive control digital module comprises a main control ARM unit and an FPGA unit, which are connected with each other. The method comprises the following steps: after the galvanometer servo motor starts to work smoothly, judging whether the system performs scanning in a working mode with the highest performance, judgingthe mode according to a set threshold, and adopting two index improvement methods: in a smooth speed running mode, importing an interpolation module to improve the resolution of a control signal so as to achieve the purpose of high-precision scanning; and in a high-speed scanning mode, importing a repeated tracking accumulated error control unit to perform error collection and correction for multiple cycles so as to achieve the purpose of improving the precision. The control system disclosed by the invention ensures stable and efficient operation of a high-precision three-dimensional imagingscanning system in a high speed state.

The invention relates to a real-time correction method for a rotor time constant of a three-phase asynchronous motor. An excitation mutual inductance lookup table and a rotor resistance temperature lookup table are established, the excitation mutual inductance Lm is queried according to excitation current, the excitation mutual inductance Lm and the rotor leakage inductance Lsigma are added to obtain the rotor inductance Lr, the rotor resistance Rr is queried according to the stator winding temperature of the motor, namely the rotor temperature, and the rotor time constant can be calculated according to the rotor inductance Lr and the rotor resistance Rr, and thus the real-time correction of the rotor time constant is realized. According to the scheme of the invention, the real-time correction method for the rotor time constant is easy to implement in engineering, the influence of the rotor temperature on the rotor resistance is considered, and the influence of flux saturation on the rotor inductance is also considered; the scheme is not only applicable to the operation area within the base speed of the motor, but also to the high-speed flux weakening area of the motor; and moreover, the rotor time constant of the three-phase asynchronous motor can be corrected in real time, the rotor field orientation accuracy, torque control accuracy, flux weakening control stability and system operation efficiency can be improved, and the dynamic and static performance of vector control can be improved.

The invention discloses a corridor double escalator with balancing units, and relates to an elevating device. The escalator is arranged in a corridor, and is advantaged in that the escalator does not affect ventilation and natural lighting, operates safely and reliably, can keep the corridor unobstructed, and is simple and convenient to use, low in cost and short in construction period and the like. The corridor double escalator comprises guide frames, main frames, the balancing units, a driving unit and safety protection units, the guide frames are symmetrically and fixedly arranged on walls at two sides of the corridor and are parallel to the slope of stairs, the main frames are movably arranged on the guide frames and move on the guide frames through the driving unit, the balancing units are arranged on the guide frames and are connected with the main frames through wire ropes and rope guide wheels, and the safety protection units are arranged on the main frames or the guide frames, and are connected with a controller and an electromagnetic brake. The corridor double escalator with the balancing units can be used as an escalator and also can be used as a staircase. By employing the corridor double escalator with the balancing units, conflict of residents on high and low floors can be alleviated, the elevator mounting problem which puzzles us for many years is solved, and the corridor double escalator can be widely applied to duplex apartments, small villas and urban and rural low-rise buildings.

The invention relates to a multi-antipode magnetoelectric encoder angle value redundancy output method and device. According to an implementation device based on the multi-antipode magnetoelectric encoder angle value redundancy output method, the method comprises the following steps: firstly, calculating a single-antipode angle value theta 1 and a multi-antipode angle value theta 2; carrying out angle value subdivision to obtain a plurality of pairs of subdivided polar angle values theta 3; scaling the theta 3 in equal proportion to obtain a plurality of antipodal angle values theta 4 with theangle amplitude range of 0-65535LSB; fitting the single-antipode angle value theta1 to the angle value theta 4 to obtain a fitted single-antipode angle value theta 5; and determining the final anglevalue theta fin output according to the difference value range of the fitted single-antipode angle value theta 5 and angle value theta 4; determining whether the angle value difference value range exceeds a set range or not, so as to determine whether the angle value theta 4 has a solving fault or not; if so, outputting the angle value theta 5 as a final angle value theta fin, and if not, outputting the angle value theta 4 as the final angle value theta fin. The invention aims to correct the jump point error of the magnetoelectric encoder, even if the temperature changes, the measurement result of the magnetoelectric encoder can be prevented from generating jump points, and the measurement precision of the magnetoelectric encoder is effectively improved.

The invention relates to a 477-566MHZ micro power wireless remote control transmitting and receiving circuit which comprises: an operating unit (1), a logic control unit (2), a encoding unit (3), a reference signal unit (4), a display unit (5) which adopts light-emitting diode or liquid crystal display mode to finish and is used to display the transmitter cell and the carrying condition of the operating condition, a DC / DC converting unit (6) which is connected with the operating unit (1), the display unit (5), the logic control unit (2), the encoding unit (3) and the reference signal unit (4), wherein the receiving circuit comprises a receiving unit (7), a decoding unit, a signal processing unit (8), an executing driven unit (9), a signal feedback unit (10), and a loading unit (11).

The invention discloses an intelligent electric control device for an electric door lock based on RFID and a working method thereof. The device comprises an RFID remote controller, an RFID decoder, a logical judgment circuit, an electric lock switch control circuit, a silence control circuit, an electric lock state feedback detection circuit, a buzzer warning circuit and a storage battery state detection circuit. According to the invention, the device is kept in a normally closed lock state when no operation is executed after electrifying, so that the locking state of a vehicle door can be kept after the power supply of the device recovers the normal power supply under the condition of accident outage or unstable instantaneous voltage. The logical judgment circuit, the electric lock state feedback detection circuit and the electric lock switch control circuit of the device are all arranged as double-loop redundant protecting circuits, and the damage to one circuit can not result in control failure. The device disclosed by the invention is suitable for an economical RFID intelligent electric control device adopted by the railway industry; the intelligent electric control device can be used together with a common electric door lock; and an RFID radio-frequency signal is not interfered while the safety and reliability are ultrahigh.

The invention relates to the technical field of safety supplies, in particular to a welding gun handle fastening pressing sleeve. According to the fastening pressing sleeve arranging key technology, the pressing sleeve is composed of a welding gun handle, a fastening pressing sleeve body, a welding gun protection sleeve and a ribbon, wherein the tail end of the welding gun handle and the front end of the welding gun protection sleeve are fastened and connected through the ribbon, external threads of the tail end of the welding gun handle and internal threads of the fastening pressing sleeve body are connected in a threaded fastening mode, and the fastening pressing sleeve body is connected with the front end of the welding gun protection sleeve are connected in a sleeved and compressing mode. The welding gun handle fastening pressing sleeve is used for safety protection of a welding gun, is ingenious in concept, simple in structure, convenient to use, obvious in effect and convenient to manufacture and facilitates popularization.

Disclosed is a magnetic force limiter, for solving the problem that, in current traction devices, the running or stopping of a driving device is controlled by an electrical switch or an electronic component, wherein when the electrical switch or the electronic component fails, or when a manual operation error occurs, accidents may easily happen, thus endangering personal safety. Provided is a magnetic force limiter, wherein two tension members (1Α, 1Β) are magnetically attracted to each other, thereby together constituting a tension connection assembly, and force bearing points for applying tension to the tension connection assembly are arranged at both ends of the tension connection assembly. When the tension achieves the magnetic suction-combining force, the tension connection assembly is separated, thereby releasing the tension, and ultimately playing a protective role. Since no electronic component is needed, it will not produce uncontrolled situations, and thus can effectively ensure safety.

The invention discloses a motor-driven 3-DOF (three degrees of freedom) domestic game motion simulator, comprising a base, a moving platform, a rotary platform, a first rocking mechanism, a second rocking mechanism and a rotary driving mechanism; the moving platform is connected with the base through hooke joint; the first rocking mechanism is fixed to the rear left of the base through a threadedconnector; the second rocking mechanism is fixed to the rear right of the base through a threaded connector; the first and second rocking mechanisms are connected with the moving platform through joint ball bearings; the rotary platform is mounted on the moving platform, and a bearing is mounted between the rotary platform and the moving platform; the rotary driving mechanism is mounted in the moving platform, an output shaft of the rotary driving mechanism is inserted into a shaft bore of the rotary platform, and the rotary driving mechanism is used for directly driving the rotary platform. The motor-driven 3-DOF domestic game motion simulator can rotate around three coordinate axes through driving of a low-power motor, and is simple and compact in structure, low in power consumption, lowin cost, good in simulating effect and suitable for domestic use.

The invention relates to a built-in differential mechanism of a new energy automobile motor. The built-in differential mechanism comprises a differential mechanism shell, a right output shaft and a left output shaft are rotatably connected to the two ends of the differential mechanism shell respectively, and a right output assembly, a floating connection assembly and a left output assembly are sequentially arranged in the differential mechanism shell; the floating connection assembly comprises a magnetic floating assembly and a torque conversion assembly; and a drive circuit is also included. Two groups of permanent magnets and stator windings which are symmetrically arranged are utilized to realize equal-speed and equal-torque output of double wheels when a vehicle is in a common mode, and when the vehicle is trapped or slips, an iron core for wheel output can be switched by controlling an output circuit on the premise that power supply is not cut off, that is, wheel power is not lost. The two groups of stator windings connected in parallel are switched into the two groups of stator windings connected in series, and the current in a series circuit is equal, so that the two groups of stator windings can be forced to work under the same working condition.

The invention relates to an oil hydraulic cylinder for braking. The oil hydraulic cylinder used for a pair of calipers for braking comprises an oil hydraulic cylinder body and a piston, wherein the oil hydraulic cylinder body is provided with an accommodation space horizontally arranged inside the oil hydraulic cylinder body for accommodating the piston movably in a sealing state. The accommodation space is divided into a first accommodation chamber and a second accommodation chamber, wherein the diameter of the second accommodation chamber is smaller than that of the first accommodation chamber. The piston is provided with a first part and a second part which are respectively and adjacently arranged in the first accommodation chamber and the second accommodation chamber in a movable and sealing state. The oil hydraulic cylinder provides different braking powers of two stages and does not have the phenomenon of deadlock or out of control due to oversized braking power. With simple structure, the oil hydraulic cylinder is easy to manufacture and assemble.

The invention discloses a photovoltaic power generation system maximum power point capturing system and a control method thereof. The system is composed of a photovoltaic power generation main loop and a photovoltaic power generation control loop; the photovoltaic power generation main loop is composed of a photovoltaic array, a direct current converter and a load, and the photovoltaic power generation control loop is composed of a vector measuring unit and an MPPC unit. According to the method, fast capturing of a photovoltaic power generation system maximum power point is achieved online, that is to say, a technology of positioning and capturing in one step is achieved online; through arrangement of a maximum power point stable range, the problem of static response oscillation is eliminated; photovoltaic array output voltage basically identically equals to maximum power point voltage, and output power is basically identically equal to the maximum power. By means of the method, photovoltaic array output fluctuation caused by solar power fluctuation and load fluctuation is reduced to an extreme; particularly, the problem of loss of control possibly caused by solar power drastic fluctuation is eliminated.

The invention discloses an intelligent electric control device for an electric door lock based on RFID and a working method thereof. The device comprises an RFID remote controller, an RFID decoder, a logical judgment circuit, an electric lock switch control circuit, a silence control circuit, an electric lock state feedback detection circuit, a buzzer warning circuit and a storage battery state detection circuit. According to the invention, the device is kept in a normally closed lock state when no operation is executed after electrifying, so that the locking state of a vehicle door can be kept after the power supply of the device recovers the normal power supply under the condition of accident outage or unstable instantaneous voltage. The logical judgment circuit, the electric lock state feedback detection circuit and the electric lock switch control circuit of the device are all arranged as double-loop redundant protecting circuits, and the damage to one circuit can not result in control failure. The device disclosed by the invention is suitable for an economical RFID intelligent electric control device adopted by the railway industry; the intelligent electric control device can be used together with a common electric door lock; and an RFID radio-frequency signal is not interfered while the safety and reliability are ultrahigh.

The invention discloses an asynchronous rib spalling control device of an isolated coal pillar composite type coal wall. Axial hydraulic support and radial hydraulic support are adopted in a hinged position of a hydraulic bracket, and a hinged shaft can be effectively protected; meanwhile, a cross-shaped rotary seat is adopted for hinge joint, radial support and axial support are facilitated, thehinged force condition can be effectively improved, and the stability of support is guaranteed; and meanwhile, during asynchronous rib spalling control, fine adjustment can be carried out on a supporting angle of a rib spalling protection plate by using a hydraulic supporting control mechanism, during fine adjustment, due to the control of hydraulic supporting force, stable micro adjustment can beeffectively realized, the adjustment is stable and reliable, the uncontrolled condition of angle adjustment cannot occur, and asynchronous rib spalling control over the isolated coal pillar compositetype coal wall is adapted; and the angle of the rib spalling protection plate can be adjusted to be suitable for the coal walls with different angles.

The invention relates to a composite prepreg and ethylene propylene diene monomer heat insulation layer co-curing adhesive film and a preparation method thereof. The invention belongs to the technical field of adhesives, and relates to a composite prepreg and ethylene propylene diene monomer heat insulation layer co-curing adhesive film and a preparation method thereof. The composite prepreg and ethylene propylene diene monomer heat insulation layer co-curing adhesive film is prepared from the following components in parts by weight: matrix resin, a main flexibilizer, an auxiliary flexibilizer, a curing agent, a vulcanizing agent and a filler. The method comprises the following steps of: 1, performing weighing; 2, preparing homogeneous-phase blended resin; 3, preparing a rubber material; and 4, performing preheating and pressing. The adhesive film material disclosed by the invention has good autohension and a good paving property on an ethylene propylene diene monomer heat insulation layer; and meanwhile, the thickness of the adhesive film is uniform, the mass per unit area is accurate and controllable, and the stability and the reliability of co-curing adhesive joint of a composite prepreg and the ethylene propylene diene monomer heat insulation layer are ensured. With the preparation method adopted, the composite prepreg and ethylene propylene diene monomer heat insulation layer co-curing adhesive film can be obtained.

The invention belongs to the technical field of roll-cutting machines, and particularly relates to a roll-cutting machine for cutting and forming a woodwork PET plate, the roll-cutting machine comprises a support and a PET plate, the two ends of the support are respectively provided with a roll-cutting mechanism for roll-cutting feeding and a leading-out mechanism for leading out after roll-cutting, and after the PET plate is input from the hobbing mechanism and is subjected to hobbing, residual materials are exported from the exporting mechanism. According to the hobbing machine for cutting and forming the woodwork PET plate, the hobbing mechanism is arranged, so that the effect of rapid replacement can be achieved according to different cutting requirements of the plate, and a micro gear motor drives a cam to achieve angle deflection; then, the surface of a cam makes contact with the surface of a lock rod, the cam is pushed outwards to be inserted into lock holes in the surfaces of the two ends of the roller to achieve locking or unlocking of the hobbing cutter, and then the rapid replacement effect is achieved; and the problem that the whole roller is replaced due to different requirements is avoided.

The invention discloses a remote safety control system and method for a vehicle-mounted air conditioner of a new energy vehicle. The system includes: a mobile terminal, which is connected to a T-BOX for remote communication, and the T-BOX is connected to a PTC controller through a CAN line, and the PTC controls The controller communicates with the battery management system BMS through the CAN line, the battery management system BMS communicates with the main negative relay, the pre-charging relay and the main positive relay, and the PTC controller connects with the air conditioning control system CLM and the motor controller MCU through the CAN line. During the period when the remote heating control of the air conditioner starts and cancels the heating, the PTC controller is in the remote control mode and temporarily takes over part of the control functions of the VCU, such as: sending commands to the BMS to connect and disconnect the battery, and sending commands to the MCU to enter the active discharge mode and Enter the sleep mode command, after the PTC controller exits the remote control mode, it does not have part of the control functions of the above VCU. Thereby avoiding the PTC controller and the VCU control function intersection in the normal driving process, resulting in control confusion.

The invention discloses a photovoltaic power generation system maximum power point capturing system and a control method thereof. The system is composed of a photovoltaic power generation main loop and a photovoltaic power generation control loop; the photovoltaic power generation main loop is composed of a photovoltaic array, a direct current converter and a load, and the photovoltaic power generation control loop is composed of a vector measuring unit and an MPPC unit. According to the method, fast capturing of a photovoltaic power generation system maximum power point is achieved online, that is to say, a technology of positioning and capturing in one step is achieved online; through arrangement of a maximum power point stable range, the problem of static response oscillation is eliminated; photovoltaic array output voltage basically identically equals to maximum power point voltage, and output power is basically identically equal to the maximum power. By means of the method, photovoltaic array output fluctuation caused by solar power fluctuation and load fluctuation is reduced to an extreme; particularly, the problem of loss of control possibly caused by solar power drastic fluctuation is eliminated.

The invention discloses a large deformation rubber supporting seat for reducing the shear stiffness of a pull rope limiting composite cross section. The rubber supporting seat is arranged between an upper top plate and a lower top plate, and an annular pull rope penetrates a first through hole and a second through hole; multiple layers of sliding rubber supporting seats are arranged at a hollowedout part of a plate-type rubber supporting seat and used for forming a composite section and increasing a sliding face. According to the rubber supporting seat, multiple layers of the sliding rubber supporting seats are arranged on the hollowed plate type rubber supporting seat to form a composite cross section, displacement mutation of the composite cross section supporting seat takes place on aninternal sliding face so that horizontal stiffness can be reduced to adapt to larger deformation; a pull rope penetrates through the upper and lower top plates, and therefore the whole supporting seat is provided with energy-consuming and limiting capabilities.

The invention discloses a large-deformation rubber support whose shear stiffness is reduced by the limit combination section of the cable. In the through hole; the multi-layer sliding rubber bearing is arranged in the hollow of the plate rubber bearing to form a combined section and increase the sliding surface. The present invention forms a combined section by placing a multi-layer sliding rubber bearing on the hollow plate rubber bearing, and the displacement mutation of the combined section bearing occurs on the internal sliding surface so that the horizontal stiffness can be reduced to adapt to larger deformation; in the upper and lower top plates Penetrating through the cable makes the entire support have energy dissipation and position limiting capabilities.

The invention relates to the technical field of safety supplies, in particular to a welding gun handle fastening pressing sleeve. According to the fastening pressing sleeve arranging key technology, the pressing sleeve is composed of a welding gun handle, a fastening pressing sleeve body, a welding gun protection sleeve and a ribbon, wherein the tail end of the welding gun handle and the front end of the welding gun protection sleeve are fastened and connected through the ribbon, external threads of the tail end of the welding gun handle and internal threads of the fastening pressing sleeve body are connected in a threaded fastening mode, and the fastening pressing sleeve body is connected with the front end of the welding gun protection sleeve are connected in a sleeved and compressing mode. The welding gun handle fastening pressing sleeve is used for safety protection of a welding gun, is ingenious in concept, simple in structure, convenient to use, obvious in effect and convenient to manufacture and facilitates popularization.

A magnetic force limiter (3) and vertebral body traction bed thereof; the magnetic force limiter (3) comprises a magnet (3.2), a tensioning piece (3.1), a first fixed seat (3.31) and a base (3.4); the tensioning piece (3.1) is comprised of an attraction piece (3.11) and a hook (3.12); the first fixed seat (3.31) is a magnetic body, and is a groove-shaped structure formed by bending a metal plate; the first fixed seat (3.31) has a middle flat seat (3.31A) and two bent end feet (3.31B); the first fixed seat (3.31) is horizontally installed and fixed on the base (3.4); the magnet (3.2) is fixed on one side of the flat seat (3.31A) of the first fixed seat (3.31), and the tensioning piece (3.1) is disposed at the other side of the flat seat (3.31A); the magnet (3.2) and the attraction piece (3.11) are separated by the flat seat (3.31A), and are attracted via magnetic force to form a tension connecting assembly; external tension is applied on the tension connecting assembly via the hook (3.12); and when the tension reaches the magnetic attraction force, the tension connecting assembly will separate to release the tension. The vertebral body traction bed employing the magnetic force limiting device (3) comprises a bed body (1), an electric drive device (2) and a pulling belt device (4); the electric drive device (2) is disposed at the lower side of a bed board (1.1); the magnetic force limiting device (3) is connected in tandem with the pulling belt device (4), and the magnetic attraction force of the magnetic force limiting device (3) is the safe tension. When the traction force reaches the safe tension, the tension connecting assembly (3) is separated to release the tension, thus protecting the safety of a human body.

The invention discloses a control system and method for a laser radar vibrating mirror servo motor. The system includes a host computer, a drive control digital module, a three-ring control analog module, a high-frequency pulse laser front end, and a scanning galvanometer. The drive control digital module includes a master control ARM unit and an FPGA unit connected to each other; the method is: After the mirror servo motor starts to work smoothly, it is judged whether the system is scanning in the highest performance working mode, and the mode is judged according to the set threshold, and two index improvement methods are adopted: in the mode of smooth speed operation, the introduction of interpolation module to drive The resolution of the control signal is improved to achieve the purpose of high-precision scanning; in the high-speed scanning mode, the repeated tracking cumulative error control unit is introduced to perform multi-cycle error collection and correction to achieve the purpose of improving accuracy. The invention ensures that the high-precision three-dimensional imaging scanning system can run stably and efficiently at high speed.

The invention discloses an environment-friendly power storage type Internet of Things terminal energy consumption and power saving management system and method, and the system comprises a central processing unit, the input end of the central processing unit is unidirectionally and electrically connected with a timing module, the central processing unit is bidirectionally and electrically connected with a storage module, and the central processing unit is bidirectionally and electrically connected with a networking module, the networking module is bidirectionally and electrically connected with a control terminal, and the input end of the central processing unit is unidirectionally and electrically connected with a tone recognition module. Through cooperative use of the central processing unit, the timing module, the networking module, the control terminal, the tone recognition module, the voice interaction module, the information acquisition module, the face recognition module, the storage battery, the electric quantity detection module, the intelligent switch and the networking device, the power-saving management requirement can be met, and personalized customization can be performed according to the requirement of a user, therefore, the maximum equipment use rationality can be achieved, energy and electricity are saved, and the social requirements of energy conservation and environmental protection can be met.

The invention discloses an asynchronous rib spalling control device of an isolated coal pillar composite type coal wall. Axial hydraulic support and radial hydraulic support are adopted in a hinged position of a hydraulic bracket, and a hinged shaft can be effectively protected; meanwhile, a cross-shaped rotary seat is adopted for hinge joint, radial support and axial support are facilitated, thehinged force condition can be effectively improved, and the stability of support is guaranteed; and meanwhile, during asynchronous rib spalling control, fine adjustment can be carried out on a supporting angle of a rib spalling protection plate by using a hydraulic supporting control mechanism, during fine adjustment, due to the control of hydraulic supporting force, stable micro adjustment can beeffectively realized, the adjustment is stable and reliable, the uncontrolled condition of angle adjustment cannot occur, and asynchronous rib spalling control over the isolated coal pillar compositetype coal wall is adapted; and the angle of the rib spalling protection plate can be adjusted to be suitable for the coal walls with different angles.