7results about How to "Avoid head-to-head" patented technology

The utility model discloses a structural steel node for seismic reinforcement of an existing building, which relates to the technical field of constructional engineering and comprises a box component and an energy consumption component. The box body assembly comprises a main box body, a hydraulic bin and an air pressure bin; damping oil is filled in the hydraulic bin; a first pushing piece is arranged in the air pressure bin; the energy consumption assembly comprises a connecting block and a second pushing piece; the connecting block is fixedly connected with the second pushing piece; when vibration occurs, a steel beam connected with the profile steel joint transmits the vibration to a connecting block, then the vibration is transmitted to a second pushing piece through an ejector rod, a piston slides in a hydraulic bin, the vibration is consumed, meanwhile, an air pressure bin is arranged, when damping oil is pushed, the first pushing piece is driven to move, and the damping oil is pushed to move. The air in the air pressure bin is compressed, so that the oil pressure of the damping oil is always kept within a reasonable range, a building structure is prevented from colliding with vibration under the condition of an earthquake, and the overall shock resistance of a building is improved.

The utility model discloses a scraper device and waste gas treatment equipment. The scraper device is applied to a gas inlet pipeline of the waste gas treatment equipment, the gas inlet pipeline introduces waste gas into the waste gas treatment equipment, and the scraper device comprises a driving device arranged on a mounting port of the gas inlet pipeline; one end of the main shaft is connected with the driving device, and the other end of the main shaft extends into the air inlet pipeline from the mounting port; the scraper assembly is located in the air inlet pipeline and hinged to the main shaft; the driving device drives the main shaft to rotate and provides centrifugal force for the scraper assembly, and the scraper assembly is unfolded under the action of the centrifugal force and makes contact with the inner wall of the air inlet pipeline so as to remove attachments on the inner wall of the air inlet pipeline. Centrifugal force brought by the driving device is used for driving the scraper assembly to unfold and make contact with the inner wall of the gas inlet pipeline so as to remove attachments on the inner wall of the pipeline, accumulation of crystals in the pipeline can be effectively prevented, the maintenance frequency of waste gas treatment equipment is reduced, and the operation time of the equipment is prolonged.

The laser head protection mechanism comprises a base and a movable seat, the base is fixedly connected with a mechanical arm, the movable seat is fixedly connected with a laser head, and the base is provided with a first side face, a second side face and a magnetic attraction part on the first side face and the second side face. The movable seat is provided with a first connecting surface and a second connecting surface, electromagnetic suction plates are arranged on the first connecting surface and the second connecting surface, after assembly, the first connecting surface is attached to the first side surface, the second connecting surface is attached to the second side surface, and the electromagnetic suction plates attract the magnetic suction parts in a power-on state; wherein an anti-falling device is arranged between the movable seat and the base to prevent the movable seat and the laser head from falling, the movable seat is provided with a bearing part and an offset sensor, the bearing part is connected with the base to bear the weight of the movable seat and the laser head, and the offset sensor is used for detecting the deviation value between the movable seat and the base. And the offset sensor is electrically connected with the electromagnetic suction plate. And during collision, the laser head can fall off, and the laser head is prevented from falling off and being broken in cooperation with the anti-falling device.

The utility model relates to a multi-stage separation type ridge culture rhizome crop harvesting device which comprises a vehicle body and is characterized in that a soil screening assembly used for bearing and screening crops is arranged in the vehicle body, the soil screening assembly comprises a screen, the peripheral side of the screen is connected to the vehicle body through an elastic plate, top plates are symmetrically arranged on the two sides of the screen, and the top plates are arranged on the vehicle body. A sliding rod extending in the inclined direction is vertically arranged on each top plate in a penetrating and sliding mode, a sleeve is fixedly connected to the bottom of each sliding rod, an eccentric wheel for driving the corresponding sleeve to push and pull the corresponding sliding rod in a reciprocating mode is arranged in each sleeve, and the eccentric wheels penetrate through the same driving rod and are in linkage; a conveying belt is arranged below the screen, a stirring assembly used for circularly stirring the inner surface of the conveying belt is arranged between the upper layer and the lower layer of the conveying belt, and the multi-stage separation type ridge culture rhizome crop harvesting device is reasonable in structure, high in adaptability and capable of effectively protecting crops.

The present invention provides a root box, which relates to the technical field of oilfield drilling equipment. The root box is used for drilling rod rooting, and includes a frame, a plurality of assembled crossbar assemblies and a plurality of carbonized sleepers. The plurality of assembled crossbar assemblies are rotatably connected to the frame and are detachably arranged relative to the frame, the plurality of carbonized sleepers are detachably mounted on the frame, the plurality of assembled crossbar assemblies and the plurality of carbonized sleepers are staggered, the assembled crossbar assemblies form a guide arc surface for guiding the drill rod to the carbonized sleepers, and the carbonized sleepers are used to carry the drill rod. The root box provided by the present invention can avoid direct "steel-to-steel" contact between the drill rod and the root box, protect the drill rod thread, and is easy to clean and maintain, and has a simple structure.

The present application belongs to the field of aircraft control technology, and relates to a kind of active stick control method based on double closed loop, comprising the following processes: obtaining aircraft state information, joystick position signal and stick force signal;Desired control force is obtained by calculation according to aircraft state information and joystick position signal;Desired control force and stick force signal of joystick are obtained through force closed loop control to obtain virtual sensing signal;Virtual sensing signal and position signal of joystick are output through position closed loop control to output closed loop motor instruction;According to the stick force signal of joystick, the force feedback motor instruction based on the stick force is obtained through force compensation;The closed loop motor instruction and the force feedback motor instruction are integrated, and the motor driving instruction is output through instruction conversion to drive the motor to move.After obtaining the force signal, the force signal is directly acted on the motor driving model through the force compensation control model, so that the motor follows the force sensed by the sensor to move quickly first, and the redundant force effect of the hand is inhibited.

An external locking hinge and shower door, comprising a movable seat, a fixed seat and a rotating shaft assembly, wherein the movable seat and the fixed seat are respectively connected to the movable door and the fixed door, the rotating shaft assembly is installed between the movable seat and the fixed seat, the fixed seat is provided with a fixed body and at least two first locking members, the fixed body is correspondingly provided with at least two mounting holes, one end of the first locking member is fixedly passed through the corresponding mounting holes, and the other end is used to be connected to the fixed door; the movable seat is provided with a movable body and at least two second locking members, the movable body is correspondingly provided with at least two mounting holes, one end of the second locking member is fixedly passed through the corresponding mounting holes, and the other end is used to be connected to the movable door. The present invention is convenient for installation outside the shower room, has a simple structure, and is more beautiful as a whole.