59results about How to "Realize emergency stop" patented technology

The invention provides a robot control system based on a universal computer. The robot control system comprises a robot controller, a data transmission module, a servo driving module, a safety unit, ademonstrator and a power module. The servo drive module is connected to the robot controller through the data transmission module and receives a motion instruction of the robot controller to drive the robot to move. The safety unit is connected to the robot controller and the servo driving module through the data transmission module, and when an input abnormal signal or a fault signal is received, the servo driving module is closed and the input abnormal signal or the fault signal is transmitted to the robot controller. The demonstrator receives a terminal video signal and a first control interaction signal sent by the robot controller; and meanwhile, a second control interaction signal is sent to the robot controller to control the operation of the robot controller. The power module is electrically connected with the robot controller and the safety unit.

The invention relates to a heavy electric radiation protection door. The door comprises a base with door hole, a door body and an electric control box, wherein the base above the door hole is provided with a main beam into which a lead screw driven by a motor is penetrated; multiple groups of horizontal pulleys are hung at the lower end of a nut engaged with the lead screw; rollers arranged at the upper ends of each group of horizontal pulleys are pressed on the surface of a horizontal guide rail arranged on the main beam in a sliding way; and all the lower ends of each group of horizontal pulleys are connected with the upper end of the door body. The door has a simple structure; stable and accurate running of the door body is realized by the lead screw and the horizontal pulley; opening or closing of the door body is realized by a frequency converter control motor; and the door has high automation level, is safe and reliable, and has a good radiation protection effect because barium sulfate concrete is filled in the door body.

The invention provides a robot safety logic control system. The system comprises a servo driving module, a safety unit and a bus transmission main station which are connected with one another. The safety unit and the bus transmission main station are mutually monitored, a first safety loop is established between the safety unit and the servo driving module, and a second safety loop is establishedbetween the bus transmission main station and the servo driving module. When the safety unit receives the abnormal input signal and monitors that the bus transmission main station breaks down or breaks down, a first safety control signal is generated in the first safety loop to close the output of the servo driving module. Meanwhile, when the bus transmission main station receives an abnormal input signal output by the safety unit, the bus transmission main station breaks down or monitors that the safety unit breaks down, a second safety control signal is generated in the second safety loop soas to close the output of the servo drive module.

The invention relates to a security punching machine capable of realizing jogging control of a punching head, which consists of a worktable, a stander, the punching head, a crank shaft and a driving motor, wherein the punching head is longitudinally and movably arranged on the stander on the upper part of the worktable and is sleeved at the front end of the crank shaft, and the back end of the crank shaft and the driving motor which is fixedly arranged on the back surface of the stander are arranged in linkage. The security punching machine has the following innovative points that: the other end of the crank shaft is provided with an output end big gear wheel of a reducing gear set in a driven mode; a driving shaft of an input end small gear wheel of the reducing gear set is fixedly provided with a driven disk of a pneumatic clutch; and a driving disk of the pneumatic clutch is in linkage with an output shaft of the driving motor. The security punching machine has a scientific and reasonable structural design, realizes the jogging control of the punching head by controlling the engagement and the disengagement of the pneumatic clutch, facilitates die alignment, and has the advantages of stable running, precise control, convenient operation, safe use and the like.

The invention discloses rotation stopping equipment for a transmission shaft and a use method of the equipment. The equipment comprises a machine body, a first cavity formed in the machine body and asecond cavity formed in the machine body, a third cavity is formed in the right end wall of the first cavity, a first sliding block is slidably disposed in the third cavity, a rotating sleeve extending to the left and right is rotatably arranged in the first sliding block, and a spline hole which is communicated with the left and right is formed in the rotating sleeve. The equipment is simple in structure and convenient to operate, a same power source is adopted for driving the power connection of a driving machine and the separation of an output shaft of the driving machine, a locking block is driven to be mechanically connected with the driving machine at the same time, so that the power of the driving machine is utilized to eliminate the inertia of the output shaft, emergent stopping ofthe output shaft of the equipment is achieved, and the output precision of the equipment is improved. Meanwhile, the driving machine can be automatically powered on, powered off and locked after thekinetic energy is achieved, work procedures cooperate with one another without affecting one another, and the practical performance of the equipment is improved.

The invention relates to a fall prevention brake device of an inclined shaft transportation car. The fall prevention brake device comprises a main pull rod, colliding iron, a clamping jaw, a support block, a holding jaw, a brake spring, a guide rod, baffle plate channel steel and a starting spring, wherein the colliding iron is installed on the main pull rod to divide the main pull rod into a front pull rod and a rear rod, and one end of the rear pull rod penetrates through the baffle plate channel steel and the starting spring to be connected with a retaining nut; the clamping jaw is connected with the support block, and the support block is hinged with the guide rod; the brake spring is installed on the guide rod, and the holding jaw is connected with the support block; the front pull rod of the main pull rod is connected with a car main-rope connecting device, is arranged at the center of a chassis of the transportation car, and bears the traction load of the whole car. The brake device adopts double braking modes of automatic braking and manual braking and solves the problem that the transportation car falls when traction is lost after hoisting equipment breaks down or a steel wire rope is broken. Meanwhile, a damping device is installed on the car to ensure that the transportation car overcomes the action of inertia force during braking and can steadily brake.

The invention discloses a tail safety brake device of a motor vehicle, which is installed at the tail part of the motor vehicle. The device comprises a support (3) and a pressure rod (7), wherein the support (7) is fixed at a tail bottom plate (6) or on a tail base frame; one end of the pressure rod (7) is moveably connected with the support and the other end of the pressure rod (7) is moveably connected with a brake plate (8); the brake plate comprises a support plate (9) and a wear-resistance plate (12) moveably fixed on the support plate; the pressure rod is moveably connected with an ejector rod (5) which makes the brake plate suspended when the motor vehicle runs normally and makes the wear-resistance plate on the brake plate tightly adhered to the pavement when the motor vehicle performs emergency brake; and the ejector rod is connected with a power unit. When the motor vehicle performs emergency brake during high-speed running, the friction force between the motor vehicle and the pavement can be increased, so that the brake capability is improved and the brake distance is shortened; and the emergency brake is realized in a relatively short distance which can be effectively controlled as far as possible, so various traffic accidents are reduced. The novel tail auxiliary safety brake device of the motor vehicle is compactly structured, reliable and safe to use and convenient to dismantle.

The invention discloses a rotary touch obstacle meeting mechanism, a power integration mechanism and a clothes drying machine. The obstacle meeting mechanism comprises a cover plate, a body part, an on-off elastic sheet and an abutting part. The cover plate is provided with a rotating shaft. The body part is arranged on the cover plate and is provided with a side wall. The on-off elastic sheet isconnected with the side wall and is provided with a contact portion in electric wire connection with the body part within the deformation range of the on-off elastic sheet. The abutting part comprisesa rotating portion, an abutting portion and a wire pressing portion, all of which are connected in sequence, the rotating portion is in pivotal joint with the rotating shaft, the joint of the rotating portion and the abutting portion is bent, and the abutting portion right faces the on-off elastic sheet, so that the abutting part half surrounding the body part. Under the action of external force,the wire pressing portion drives the abutting part to rotate with the rotating shaft as the axis, the butting portion moves towards the direction of the on-off elastic sheet so as to abut against theon-off elastic sheet, so that the on-off elastic sheet deforms elastically and is pressed towards the contact portion, and breakover of the body part is achieved. The size of the obstacle meeting mechanism can be reduced, detection precision and timeliness of the obstacle meeting mechanism can be improved, meanwhile, wires in the clothes drying machine are ordered, and the inner space of the clothes drying machine is saved.

The present invention relates to an application method of an adjustable motor cooling device. The motor cooling device is installed at the rear end of a motor body, a rectangular insertion rod is formed at the rear end of the output shaft of the motor body, and axially arranged cooling pins are uniformly distributed at the circumference of the outer wall of the motor body. The motor cooling devicecomprises a device housing, a transmission device, a blowing device and an opening and closing device. The application method comprises the steps of: the step 1, performing blowing and cooling by employing the blowing device; and the step 2, regulating a cooling effect. The motor cooling device employs the transmission device to transmit the power of the motor to the blowing device, the pneumaticblades of the blowing device generate an airflow, and the airflow accelerates the flow of the airflow at the outer wall of the motor body to enhance the cooling effect; and moreover, on the premise without change of the rotation speed of the motor, an adjustable outer ring is rotated to regulate the rotation speeds of transmission gears and the pneumatic blades so as to regulate the flow speed and cooling effects of the airflow.

The invention discloses stalling equipment of a transmission shaft. The stalling equipment comprises a machine body, a first cavity formed in the machine body, and a second cavity formed in the machine body. A third cavity is formed in the end wall of the right side of the first cavity, a first sliding block is slidingly arranged in the third cavity, a rotary sleeve stretching left and right is rotationally arranged in the first sliding block, and a spline hole which is through left and right is formed in the rotary sleeve. The equipment is simple in structure and convenient to operate, the same power source is adopted for driving power-on of a driver and separation of an output shaft of the driver, meanwhile, a locking block is driven to be mechanically connected with the driver, thus, the inertia of the output shaft is eliminated through power of the driver, sudden stop of the output shaft of the equipment is achieved, the output precision of the equipment is improved, meanwhile, thedriver can be automatically powered on, powered off and locked after kinetic energy is achieved, all the procedures cooperate but do not affect one another, and the practical performance of the device is improved.

The invention provides a high-speed train and an emergency braking method and system for the high-speed train. On the basis of conventional braking, a main umbrella device and an air injection deviceare additionally arranged, the main umbrella device is not opened in the normal state, the air injection device is not started, and the aerodynamic configuration of the train is not affected; when anemergency situation occurs, different braking modes are correspondingly started according to different levels of the emergency situation, the wind resistance is greatly increased through the main umbrella device and the air injection device, the braking distance is greatly shortened, the braking effect and the train operation safety are greatly improved, the wind resistance braking mode saves energy and is environmentally friendly, and the mechanical wear of the train and rails is reduced. Obstacles are recognized and obstacle distances are detected based on a visual unit, different braking modes are started according to the obstacle distances, and intelligent and automatic braking under emergency conditions is achieved.

The invention relates to the technical field of electronic commerce, and discloses an angle-adjustable rotary commodity exhibition stand. The stand includes a base, a motor is arranged on the bottom surface of the interior of the base, the right gear of the motor is engaged with a power shaft, the middle section of the power shaft is connected with a center shaft in a meshed mode, the top end of the power shaft is connected with a planet shaft in a meshed mode, the middle section of the center shaft is sleeved with a platform support, the section, in the platform support, of the center shaft is connected with a transmission shaft in a meshed mode, and the right side of the transmission shaft is connected with a platform rotating shaft in a meshed mode. A driving screw rotates to enable a poking piece to poke a brake wheel to drive the planet shaft to move left and right, forward rotation, vacancy and reverse rotation of the planet shaft are achieved, the platform support is driven to rotate around the center shaft, that is, angle adjustment and motor rotation are achieved, the power shaft, the center shaft, the transmission shaft and the platform rotating shaft are sequentially driven to rotate, and the exhibition stand rotates around the axis of the exhibition stand, so the exhibition stand rotates around the free inclined position.

A braking system (2) is used for a passenger transport installation (1) in the form of a lift, escalator or moving walkway. The braking device (5) comprising actuation equipment (7) is provided in this respect. Also provided are a pump (16) supplying a brake fluid to the piston space (11) of the actuation equipment (7) and a motor (15) which drives the pump (16). According to the invention, a control device (14) is also provided, which controls the motor (15) by way of a frequency inverter (19) in such a manner that the pump (16) supplies brake fluid at a delivery flow rate (QP) predetermined by the control device (14). A return flow rate (QL) is also made possible, wherein the pressure (pB) is set in the piston space (11) of the actuation equipment (7) corresponding to an equilibrium in which the delivery flow rate (Qp) is equal to the return flow rate (QL). The control device (14) sets the pressure (pB) in the piston space (11) of the actuation equipment (7) by way of the delivery flow rate (QP) of the pump (16). The invention also relates to a passenger transport installation (1) in the form of a lift, escalator or moving walkway having a braking system of this kind and to a method for controlling the braking force in a passenger transport installation (1) of this kind.

The invention relates to a vertical elevator safety system. A vertical elevator shaft module is installed between several floors of the floor module. The elevator shaft module is equipped with a vertical elevator module, an elevator box module in the vertical elevator module, and an elevator box module. A speed sensor module, a single-chip microcomputer module, a power module, and a smoke sensor module are installed on the top of the interior; the elevator fall cushion air cushion, the elevator passenger fall cushion air cushion module, the elevator passenger fall anti-collision air cushion module and the air cushion handrail module are installed at the bottom of the exterior. The present invention is a vertical elevator safety system integrating functions such as elevator fall buffer, elevator passenger fall buffer, elevator passenger fall collision avoidance, elevator fall emergency stop and lock, elevator fire extinguishing, elevator fire escape, elevator WIFI connection, GPS positioning and emergency center interconnection, etc. , simple in structure, easy to operate, can avoid serious elevator falling, passengers falling and passengers falling, and can effectively protect the life safety of elevator passengers.

The present invention relates to an adjustable motor cooling device which is mounted on the rear end of a motor body. The rear end of the output shaft of the motor body is equipped with a rectangularplunger. Cooling fins are circumferentially and uniformly distributed on the outer wall of the motor body in the axial direction. The motor cooling device includes a device housing, a transmission device, an air blowing device, and an opening and closing device. The adjustable motor cooling device of the invention transmits the power of the motor to the air blowing device through the transmissiondevice. The fan blades of the air blowing device generate an air flow which accelerates the flow of the air at the outer wall of the motor body, thereby enhancing a heat dissipation effect. Under thepremise of not changing the motor speed, an adjustable outer ring can be rotated to adjust the rotation speed of a transmission gear and the fan blades, thereby adjusting the air flow velocity and theheat dissipation effect.

The invention provides an intermediate frequency furnace tilting control system and method and an intermediate frequency furnace. The system comprises a driving circuit and a limiting controller, wherein the driving circuit is used for driving a furnace body of the intermediate frequency furnace to be tilted or reset, and the limiting controller is used for disconnecting the driving circuit from apower supply when the furnace body is tilted to a preset position, so that the furnace body stops tilting or resetting. According to the system, the limit position of tilting of the intermediate frequency furnace can be effectively controlled, sudden stop of a tilting mechanism at any position can be realized, the phenomenon that the tilting action of the intermediate frequency furnace is causedto be out of control due to operation errors or equipment faults, so that accidents are caused is avoided, and the operation safety of the intermediate frequency furnace is improved.

The invention discloses a pipeline robot magnetic absorption track structure. The track structure comprises an inner hexagonal plate and an outer hexagonal plate and further comprises a magnet mounting plate and a permanent magnet. The inner hexagonal plate and the outer hexagonal plate are wrapped by a track in the outer periphery direction. The two sides of the magnet mounting plate are fixed to the inner hexagonal plate and the outer hexagonal plate respectively and located at the inner side of the track. The permanent magnet is fixed to the magnet mounting plate. The spacing between the permanent magnet and the track is 1-1.5 mm. According to the pipeline robot magnetic absorption track structure, a pipeline robot can be attached to move inside a pipeline, climb the pipeline wall, move flexibly, stop abruptly, make a turn, move backwards and cross obstacles. Therefore, the pipeline robot can better detect the interior of the pipeline.

The present invention discloses a walking type intelligent road sweeper, pressure detection elements are arranged at the front position and the rear position of the rotating direction of a handrail, and the rotating direction of the handrail and the magnitude of force exerted on the handrail are detected according to electric signals output by the pressure detection elements; and therefore, the driving states of the left driving wheel and the right driving wheel are controlled according to the electric signals output by the pressure detection elements, the road sweeper is driven to move forwards or backwards or steer, electric power steering is achieved, the steering flexibility is better, the problem that steering is difficult due to the fact that a hand-held machine is too heavy is avoided, the running speed of the road sweeper can be controlled according to the magnitude of force exerted on the armrests by workers, the road sweeper can automatically adapt to the advancing speed of operators, the purpose of intelligent speed control is achieved, and meanwhile the multiple operation functions of acceleration, deceleration, steering, emergency stop and the like of a vehicle can be achieved only through the two armrests.

The invention discloses a horse-riding-type bicycle which comprises a horse-riding frame. The horse-riding frame comprises a seat bracket, a grip handle bracket and a connecting frame. Pedals are arranged at the lower end of the grip handle bracket. The seat bracket is hinged to one end of the connecting frame. The grip handle bracket is hinged to the other end of the connecting frame. A connecting rod is connected between the grip handle bracket and the seat bracket. A front wheel mounting frame and an auxiliary bracket are further arranged on the connecting frame in an extending mode. The front wheel mounting frame is provided with front wheels. The front wheels are provided with steering mechanisms. The horse-riding-type bicycle further comprises a travelling frame and a transmission mechanism. The travelling frame is connected with the connecting frame. The travelling frame is provided with a rotating shaft. The transmission mechanism comprises two sprockets, a transmission belt and a guide wheel set. The guide wheel set comprises a plurality of guide wheels. The two sprockets are arranged at the two ends of the rotating shaft through two unidirectional flywheels correspondingly. The two unidirectional flywheels are arranged oppositely. The two sprockets are in transmission connection through the transmission belt. The two ends of the transmission belt are connected to thetwo pedals correspondingly and sequentially penetrate through all the guide wheels.

The invention discloses a safety precaution method for a winding machine. The method comprises the following steps that the current rotation rate and a positive current value are acquired by the winding machine in real time; a resistance value of the winding machine is extracted by the winding machine; the emergency stop procedure of the winding machine is started when the resistance value exceeds a set threshold. The safety precaution method and system for the winding machine have the advantage of being low in cost.

The vehicle braking control device for teaching comprises a frame body (1), on which an access terminal (2) is arranged, the frame body can be connected into the vehicle, and a vehicle speed detector (3) is arranged in the frame body, which can Real-time vehicle speed is monitored, and a computer (4) is set in the frame to analyze whether the detected vehicle speed is overspeed; a control center (5) is set in the frame to start emergency braking and warning when the vehicle is detected to exceed the specified speed; An emergency brake (6) is set on the outside of the frame, which can force the vehicle to stop in an emergency; a warning module (7) is set on the frame, which can send an alarm in time when the vehicle exceeds the specified speed; the way of prompting information is sound or LED Light display; it can effectively monitor the real-time speed of the teaching vehicle, prevent students from driving too fast and cause accidents, intelligently detect and realize emergency parking.

The invention relates to the technical field of e-commerce, and discloses an angle-adjustable rotating commodity exhibition stand, which includes a base, a motor is arranged on the inner bottom surface of the base, and a power shaft is meshed with the right gear of the motor, and the power shaft The middle section of the power shaft is meshed with a central shaft, the top of the power shaft is meshed with a planetary shaft, the middle section of the central shaft is sleeved with a platform bracket, and a section of the central shaft is meshed with a transmission shaft in the platform bracket. The right side of the transmission shaft is meshed with a platform rotating shaft. The angle-adjustable rotary commodity booth, through the rotation of the driving screw, makes the paddle to toggle the brake wheel to drive the planetary shaft to move left and right, realize the forward rotation, vacancy and reverse rotation of the planetary shaft, and drive the platform bracket to rotate around the central axis, that is, the angle Adjustment, the motor rotates, which in turn drives the power shaft, the central shaft, the transmission shaft and the platform shaft to rotate, so that the display stand can rotate around its own axis, so that the display stand can rotate at a freely inclined position.

The present invention relates to an application method of an adjustable motor cooling device. The motor cooling device is installed at the rear end of a motor body, a rectangular insertion rod is formed at the rear end of the output shaft of the motor body, and axially arranged cooling pins are uniformly distributed at the circumference of the outer wall of the motor body. The motor cooling devicecomprises a device housing, a transmission device, a blowing device and an opening and closing device. The application method comprises the steps of: the step 1, performing blowing and cooling by employing the blowing device; and the step 2, regulating a cooling effect. The motor cooling device employs the transmission device to transmit the power of the motor to the blowing device, the pneumaticblades of the blowing device generate an airflow, and the airflow accelerates the flow of the airflow at the outer wall of the motor body to enhance the cooling effect; and moreover, on the premise without change of the rotation speed of the motor, an adjustable outer ring is rotated to regulate the rotation speeds of transmission gears and the pneumatic blades so as to regulate the flow speed and cooling effects of the airflow.

The invention discloses an up grade change point rope running warning protector of an endless-rope continuous towing vehicle. A pair of T-shaped rope pressing wheels opposite to each other in a staggered manner is mounted on bases; the wheel shafts of the T-shaped rope pressing wheels sleeve a rope pressing wheel base plate and are limited by use of nuts mounted on the wheel shaft; the wheel shafts are capable of moving on the rope pressing wheel base plate; an oscillating arm is mounted on the lower side surface of the rope pressing wheel base plate; the oscillating arm is mounted on an oscillating arm rotating shaft; the two ends of the oscillating arm rotating shaft are fixed on the bases; a tension spring mounting rod is arranged on the base; one end of a tension spring is fixed on the tension spring mounting rod, while the other end of the tension spring is fixed on the oscillating arm; on the rope pressing wheel base plate, sensors are mounted on the lower ends of the opposite T-shaped rope pressing wheels. The up grade change point rope running warning protector has the following technical effects that when the towing rope of the endless-rope continuous towing vehicle runs at the up grade change point, in other words, the towing rope separates from the position between the T-shaped rope pressing wheels opposite to each other in the staggered manner and the T-shaped rope pressing wheels slide down under the effect of gravity to trigger the sensors, the sensors transmit stopping signals to realize emergency shutdown; the protector is simple in structure and stable and reliable in signal detection quality, and therefore, the purpose of guaranteeing safe and normal operations of the equipment is realized.

The invention relates to an adjustable heat dissipation device for a motor, which is installed at the rear end of the motor body. The rear end of the output shaft of the motor body is formed with a rectangular insertion rod. The motor cooling device includes a device casing, a transmission device, a blowing device, and an opening and closing device. An adjustable motor cooling device according to the present invention transmits the power of the motor to the blowing device through the transmission device, and the wind-driven fan of the blowing device The leaves generate airflow, which accelerates the airflow on the outer wall of the motor body, thereby enhancing the heat dissipation effect; without changing the motor speed, the speed of the transmission gear and the fan blade can be adjusted by rotating the adjustable outer ring. Then adjust the airflow velocity and cooling effect.

The invention provides a multistage protection pneumatic reciprocating saw. The multistage protection pneumatic reciprocating saw comprises a rectangular floor base, wherein a supporting arm which vertically extends upwards is arranged at the top of the base, an upper arm which is horizontally arranged is fixedly arranged at the top end of the supporting arm, a lower arm which is horizontally arranged is fixedly arranged at the bottom end of the supporting arm, and the lower arm and the upper arm are arranged correspondingly; a horizontal working table fixedly connected with the base is arranged between the upper arm and the lower arm, and the working table is arranged close to the lower arm, and a saw body is movably arranged between the upper arm and the lower arm. The saw body comprisesa saw blade which is vertically arranged and movably penetrates through the working table, a pneumatic driving device which drives the saw blade to move up and down in the vertical direction is arranged in the base, an air supply protection device is in communication between the high-pressure air source and an input end of the pneumatic driving device and is used for controlling the on-off of high-pressure air, and the air supply protection device comprising an emergency stop switch and a broken saw protection mechanism.

The invention discloses a film camera transport mechanism, pertaining to a camera structure and design. The invention changes the mode that the electromagnet directly controls the separation and joint of the friction film, adopts the torque motor instead of the stepper motor and achieves the equivalent film transport of camera through the structure of sheet roll rotation through a periclutch drive. The mechanism includes an electromagnetic coil, a bearing, an A transmission friction disc, a periclutch shell, a drive spring, a separation spring, a transmission shaft, a transition element, a B transmission friction disc, a C transmission friction disc, an A gear, a B gear, a sheet roll, a film, a stop hook, a stop hook spring and a pin. The film transport mechanism has the advantages of compact structure, large transmission torque, high reliability, rapid transport speed and easy control of the circuit, which can solve the problems of film camera such as short shooting period and large imaging format. With small difficulty in processing, the mechanism can be also applied in the fields of printing and textile through appropriate improvement, so that the invention has a wide ranged of application.

The invention relates to a turbocharger with a variable axial section. The turbocharger comprises a compressor, an intermediate, a turbine shell and an exhaust shell which are connected in sequence; the turbine shell is provided with a waste gas inlet and is internally provided with a turbine and a vortex tube flow pass communicated with the waste gas inlet and the turbine respectively, one end of the exhaust shell is provided with an exhaust outlet, a cavity body and a moving control ring are arranged between the inner side of the turbine shell and the outer side of the exhaust shell, one end of the moving control ring is located between the vortex tube flow pass and the turbine while the other end is located in the cavity body, and the turbocharger further comprises an electronic control execution mechanism in transmission connection with the moving control ring. Compared with prior art, the axial variable section is realized by peripheral rotation and axial movement of the moving control ring, further an effective air inlet area of the turbine can be adjusted according to air inlet needs of an engine, the structure is simple, the manufacturing cost is low, the control is easy and safety and reliability are realized.

A multi-system fused three-dimensional visual command platform, the invention relates to the technical field of coal preparation systems, which includes a three-dimensional visual command platform, an OPC server, a PLC and a video system; wherein the three-dimensional visual command platform includes a video monitoring system management module, a video alarm subscription program and event processing program; the above-mentioned video monitoring system management module and event processing program are all connected to the OPC server, and the OPC server is connected to the PLC; the above-mentioned video alarm subscription program and event processing program are all connected to the video system. It can reflect the actual situation of coal preparation production more truly and accurately, and can improve the stability and safety of coal preparation production and equipment operation according to more abundant alarm items.