121results about How to "Play the role of counterweight" patented technology

The invention discloses an inspection robot for an underground coal mine. The inspection robot comprises a lower car body and an upper car body, wherein a four-wheel driving module is matched and arranged on the left and right sides of the lower car body, the four-wheel driving module comprises four wheels, a driving motor and a built-in power supply, and both the driving motor and the built-in power supply are installed in the lower car body. According to the inspection robot, a navigation module is arranged, and a laser radar is constructed, so that an underground environment is scanned, anda three-dimensional image is obtained; then a map is independently constructed by virtue of an LNM module board, and a walking route is independently planned, so that railless autonomous navigation is realized; images are collected in real time by a visible light camera and an infrared thermal imager, and if fog is generated on a lens of the visible light camera, a windscreen wiper independentlyslides, so that the clear images are collected; and if the navigation module fails, manual operation can be switched at a remote monitoring station by virtue of a WIFI control module, and a guaranteeis provided for the use of the whole robot.

The invention discloses a multifunctional forcible-entry firefighting robot; a frame is used as a carrier, a revolving platform is arranged on the frame; a crawler type traveling mechanism is arranged on a frame chassis; a cantilever crane lifting mechanism is mounted in the middle of the revolving platform through a variable amplitude oil cylinder; a hydraulic power system is arranged on the right side of the revolving platform; an electric control remote control system is arranged on the left side of the revolving platform; an extinguishant supply device is arranged at the back part of the revolving platform, and is connected with a forcible-entry firefighting device arranged at the top of a cantilever crane through a self-insurance conveying pipeline via the two sides of the revolving platform and the cantilever crane lifting mechanism; the electric control remote control system controls the hydraulic power system by accepting the command of a remote controller; the hydraulic power system provides power to the traveling mechanism, the cantilever crane lifting mechanism and the forcible-entry firefighting device. The multifunctional forcible-entry firefighting robot is equipment capable of finishing the conventional forcible-entry firefighting task and finishing the forcible-entry firefighting task under a complex environment which is difficult to be approached to and is easy to explode when being approached to.

The invention discloses an internal heat circulation type dehumidification and heat dissipation type power distribution cabinet, belongs to the field of power distribution cabinets. The cabinet realizes the circulation flow of a heat dissipation settlement ball in a closed airflow channel through the heat absorption and heat release processes of the heat dissipation settlement ball, performs continuous heat dissipation on the interior of a cabinet body, and in the circulation flow process of the heat dissipation settlement ball, a rotary moisture reducing device is pushed to rotate through thevertical falling process of the heat dissipation settlement ball, so that the flowing of air flow in the cabinet body is accelerated, the heat dissipation efficiency can be improved, the heat in thecabinet body can be uniformly distributed, local moisture in the cabinet body is heated, the vaporization of the moisture is promoted, Water vapor can be discharged to the outside along with heat flow. In addition, the rotary moisture reduction device also has an absorption effect on vaporized moisture, the influence of the moisture on electrical equipment is reduced, and the absorbed water vaporcan be quickly diffused to the outside along with the air flow along with the rotary movement of the rotary moisture reduction device, so that the moisture reduction treatment on the interior of the cabinet body is realized.

The invention discloses a propeller dynamic balance tester. The propeller dynamic balance tester comprises a base, supporting rods which are detachably arranged on the base, fixing brackets which are detachably connected onto the supporting rods, balance test assemblies which are arranged in the hollow structures of each fixing bracket, a balance connection mechanism which is erected on the balance test assemblies and is used for fixing a propeller to be tested; the positions of the fixing brackets on the supporting rods are adjustable; and one end of the balance connection mechanism is provided with a diameter-variable ring; and in a test, the propeller hub hollow part of a self-locking type propeller sleeves the diameter-variable ring. With the propeller dynamic balance tester adopted, the self-locking type propeller can be tested. The propeller dynamic balance tester has the advantages of simple structure and low cost.

The invention provides an underwater traffic tunnel, relates to the field of traffic bridges and tunnels, and solves the problem that offshore, in-water and underwater traffic tunnels are difficult toensure structural stability on the premise of not influencing passing ships. The underwater traffic tunnel comprises a body immersed in water, a connecting piece and a ventilation system, the body comprises a first cavity used for providing a passing space and a second cavity located at the lower portion of the first cavity, and the second cavity is communicated with the water; and the connectingpiece is connected with the body and the water bottom and used for resisting buoyancy, the ventilation system communicates with the first cavity and extends to the position above the water surface, and the ventilation system is arranged in a deformable manner so as to continuously ventilate when impacted. The body is safely immersed in water, and a ship can freely sail above the body; the secondcavity is communicated with water and is not easily overturned by seawater; the connecting piece resists buoyancy; and the ventilation system can be prevented from being damaged by external force through deformation movement, an escape system can be started in emergency, higher safety is achieved, and the influence of earth crust change on the tunnel is reduced.

The invention discloses a rescue vehicle. The rescue vehicle comprises a chassis, a drive transmission system, a loading box system, a cab, a supporting plate structure, a dozer blade system, an excavation system and a helix wheel movement system, wherein the chassis is installed above the helix wheel movement system, the cab sends control signals to control the drive transmission system, the supporting plate structure and the dozer blade system to move separately, power is transmitted to the helix wheel movement system through the drive transmission system to drive the whole machine to travel, the supporting plate structure rotates to drive the excavation system to rotate so that multi-direction excavation can be achieved, and the dozer blade system moves to eradicate barriers. Accordingto the rescue vehicle, an Archimedes helix wheel is creatively introduced, the rescue vehicle is suitable for marshes, brushland and other terrain environments where common wheels are liable to sink,and the rescue vehicle has the advantages of high bearing capacity, high buoyancy, good maneuverability and the like and can well make up the gap on the aspect of traveling of rescue vehicles in the extreme environment, thereby effectively enlarging the rescue range.

The invention discloses a rotary carrying robot. The rotary carrying robot comprises a base, wherein the lower side of the base is fixedly connected with the upper side of an operation platform; a vertical pipe is fixedly connected above the base; a main shaft penetrates and rotationally sleeves into the vertical pipe; a second transmission gear sleeves the lower end of the main shaft; a first motor is arranged at one side of the vertical pipe; a first transmission gear is arranged at one end of an output shaft of the first motor; the first transmission gear is in transmission engagement withthe second transmission gear; the upper end of the main shaft is fixedly connected with the lower side of a transversal pipe; and a second motor is arranged at one end of the transversal pipe. The rotary carrying robot is simple in structure; the function of rotating the transversal pipe is realized through the first motor; the function of telescoping of a slide rod is realized through the secondmotor; the lifting function of a clamp is realized through a hydraulic cylinder; and the weight of an object clamped by the clamp is detected through a gravity sensor between a connection plate and aconnection block.

The invention discloses a cast tube inserting opening polishing machine which comprises a polishing head (4), a grinding shaft rack (1) and a motor (3). The grinding head (4) and the motor (3) are connected through a belt transmission mechanism. The grinding shaft rack (1) is of an L-shaped integral structure, the long edge part of the L shape is horizontally arranged, the short edge part of the L shape is vertically arranged, and the bottom end face of the short edge part is flush with the lower surface of the long edge part. The motor (3) is arranged on the long edge part. The grinding head (4) is arranged on the outer surface of the short edge part. By the adoption of the technical scheme, integral rigidity of the grinding shaft rack is enhanced, and the deformation and shock resistant ability is enhanced; the motor can have a function of balance weights, and the number of the balance weights needing to be increased can be reduced; by means of a triangular belt tensioning adjusting mechanism convenient to adjust, time and labor are saved when triangular belts are replaced, and loss of the triangular belts is reduced; a buffering effect is remarkably promoted.

The invention provides a capsule endoscope and a direction control device thereof. The capsule endoscope comprises a magnetic permeability module. The direction control device comprises an electromagnetic power supply system and a plurality of electromagnetic coils, which are electrically connected, wherein the electromagnetic power supply system can discontinuously control the energization or de-energization of each electromagnetic coil; the electromagnetic coils surround a human body; and when the electromagnetic coils are energized under the control of the electromagnetic power supply system and a magnetic field is generated, the capsule endoscope with a magnetic permeability material in the human body moves to a position where magnetic force is maximum. By controlling the energization of the electromagnetic coils in different directions, the magnetic field with certain strength is generated, the magnetic field applies certain attraction force to the capsule endoscope with the magnetic permeability module to drive the capsule endoscope to move along the direction in which the magnetic force is maximum, and the aim of controlling the moving trajectory of the capsule endoscope at constant speed in constant direction is fulfilled.

The invention discloses an aircraft which comprises a unilateral wing used for rotatablely generating lift force, and a thrust device used for pushing the unilateral wing to rotate around the barycenter of the aircraft, wherein an aileron used for controlling a fly direction is arranged on the unilateral wing; and the thrust device is connected onto the unilateral wing, and the barycenter of the aircraft deviates from the center position of the unilateral wing along the length direction. The unilateral wing rotates around the barycenter of the aircraft to generate the lift force, so that the aircraft can vertically rise. Therefore, the aircraft disclosed by the invention has the advantage of vertical take-off and landing. Meanwhile, according to the aircraft, the lift force of the aircraft is generated by the rotation of the unilateral wing, and the front-and-back as well as the left-and-right fly direction is controlled by the aileron, so that the aircraft has the advantage of being simple in structure. According to the gyroscopic effect generated by the means that the unilateral wing rotates around the barycenter of the aircraft, the wind resistance of the aircraft and the stability of fly can be effectively improved.

An amphibious ship comprises a ship body, a propeller, a caterpillar band set mechanism, an air bag overturning and descending mechanism, a profiling wheel mechanism and a synchronous leg type mechanism, the climbing performance of the amphibious ship can be greatly improved through the four-caterpillar-band independent driving mode, and profiling wheels can assist four caterpillar bands in improving the obstacle crossing capacity of the amphibious ship. The synchronous leg type mechanism can be contracted on a ship body to facilitate transportation, landing work can be assisted after the synchronous leg type mechanism is unfolded, the air bag overturning and descending mechanism assists the amphibious ship to descend into a river through large-angle overturning of an air bag, and the four-crawler-belt mechanism, the profiling wheel mechanism, the synchronous leg type mechanism and the air bag overturning and descending mechanism are coordinated and matched together. And the amphibiousship can smoothly and stably finish the processes of going into a river and going ashore. The amphibious ship is compact and reasonable in structure and convenient to operate, land transportation running can be achieved, waterway navigation can also be achieved, and the amphibious transition operation efficiency can be effectively improved.

The invention discloses a bionic fish bait. The bionic fish bait comprises a fish-shaped housing made of a plastic material, wherein inverted-V-shaped rings for connecting are mounted on the head, the abdomen and the tail of the fish-shaped housing; and the inner part of the fish-shaped housing is divided into three cavities which are a fish head cavity, a fish body cavity and a fish tail cavity respectively; a turnover cover capable of opening and closing is arranged on the fish body cavity of the fish-shaped housing; and a through hole is formed in the turnover cover; and the surface of the fish-shaped housing is coated with a layer of silver powder. The bionic fish bait is long in lifetime, simple in structure, moderate in weight and capable of meeting different water level requirements for fishing, and can attract preys to attack due to sounding and light-diffusing effects; and besides, an unique design capable of accommodating liquid fish bait is adopted, and the liquid fish bait is slowly seeped to further attract the preys to attack, and therefore, the bionic fish bait has good fishing effect.

The invention discloses a magnetic suction type treatment process for oil-containing industrial wastewater, which belongs to the technical field of wastewater treatment, and can ensure that the oil-containing wastewater is in contact with oil drops in the wastewater in the sinking process in a mode of firstly adding magnetized microspheres in the standing process of the oil-containing wastewater; then the disintegration action is triggered and thus suspending in the oil drops by utilizing lipophilicity, and the oil drops are forced to indirectly have magnetism; then, an oil searching fiber rod is added, the oil searching fiber rod is forced to actively get close to the oil drops and make contact with the oil drops through the magnetic adsorption effect of the oil drops, adsorption and recovery of the oil drops in the wastewater are achieved, meanwhile, leakage-proof protection is conducted on absorbed oil dirt, and thus continuing to sink to the bottom; after observing that all the oil-finding fiber rods sink to the bottom, the oil-finding fiber rods sink to the water bottom to recover the magnetized microspheres and the oil-finding fiber rods in a magnet block binding manner, so that unlayered oil drops in the wastewater can be fully recovered, the recovery efficiency is high, the effect is good, the cost is low, secondary pollution is avoided, and the invention can be applied to treatment of oil-containing industrial wastewater on a large scale.

The invention discloses a self-throughput oil absorption filter plate for oil-containing waste gas, belongs to the technical field of oil-containing waste gas treatment, and aims to form a tight oil absorption net in a normal state to be matched with air guide holes specially formed in a filter plate body for air entraining. After adsorption saturation, due to the weight gain characteristic, the oil absorption flap used for absorbing oil can be swallowed by the spherical huff-puff unit on the filter plate body; meanwhile, the area is sealed, a pre-stored oil stain emulsifying agent is releasedunder the physical extrusion action, and the oil stain in the oil-containing waste gas can be efficiently absorbed under the leading emulsifying action of the oil absorption fiber bundle on the oil absorption flap. By means of the catalytic effect of the emulsifying catalytic ball to accelerate the spreading and action of the emulsifier, the high desorption of the oil absorption part of the oil absorption flap is realized, and then the oil absorption flap participates in oil absorption again after being reset under the action of magnetic force, so that the continuous treatment of oil-containing waste gas can be realized, and the oil absorption efficiency and effect are greatly improved.

The invention relates to an excavator for building a tunnel type passage. The excavator comprises a track type carrying platform, an earth loading box, a wheeled type excavation mechanism, a belt delivery mechanism and a deflection mechanism. The earth loading box is arranged on the rear end of the track type carrying platform; the deflection mechanism is arranged on the front end of the track type carrying platform; the belt delivery mechanism is arranged above the deflection mechanism and is driven to deflect by the deflection mechanism; the tail end of the belt delivery mechanism is arranged above the earth loading box; and the wheeled type excavation mechanism arranged on the front end of the belt delivery mechanism comprises a pair of excavation wheels capable of guiding the excavated earth to a spiral guidance surface of the belt delivery mechanism. The excavator for building the tunnel type passage has the characteristics of high automaticity, low excavation work amount, high excavation efficiency, and adaptation to the emergency rescue service in a collapsed mine.

The invention provides a capsule endoscope and a detection device. The capsule endoscope comprises a magnetic permeability module. The detection device comprises a magnetic field generation circuit and a frequency detection circuit, which are connected with each other, wherein the magnetic field generation circuit comprises a detection coil and an oscillating circuit; when the detection device is close to a human body, if magnetic flux is converged under the action of the magnetic field of the magnetic field generation circuit, the inductance of the detection coil of the magnetic field generation circuit is changed, so the frequency of the oscillating circuit is changed, output to the frequency detection circuit and judged by comparison; and if the detected frequency change quantity is greater than a preset reference value, the capsule endoscope with the magnetic permeability module is determined to be in the human body. The change of the magnetic flux is formed between the magnetic field generation circuit and the capsule endoscope and detected by the frequency detection circuit, and the detected frequency values are compared to judge whether the capsule endoscope with the magnetic permeability module is in the human body.

The invention discloses a box opening system for a multi-specification paper box filling machine. The box opening system comprises a box suction device, a paper box blank bin and a driving device, wherein the box suction device comprises a swinging rod and a sucker arranged at one end of the swinging rod; the sucker is arranged at a box outlet of the paper box blank bin; the other end of the swinging rod is driven by the output end of the driving device, so that the swinging rod reciprocally moves up and down. The system is further provided with a box suction regulation device and a box opening frame for extruding a paper box to be pre-opened, wherein the box outlet of the paper box blank bin is upwards inclined; the box opening frame is arranged at a position below the outer side of the box outlet of the paper box blank bin; the box suction regulation device is connected with the swinging rod, and is used for regulating the suction position of the sucker at the box outlet of the paper box blank bin. The box opening system is simple in structure and low in manufacturing cost; the position of the swinging rod of the box suction device can be regulated through the box suction regulation device according to the sizes of different products, so that the box opening requirements of paper boxes in various specifications can be met, and high universality is achieved.

The invention discloses a minimally invasive customized puncture guiding device and a puncture positioning optimization method. The device comprises a fixed base, a double-row longitudinal sliding block guide rail structure, a lifting platform, a transverse sliding seat, a double-row transverse sliding block guide rail structure and a template reversing mechanism. The double-row longitudinal sliding block guide rail structure is installed on the fixed base; the lifting platform is mounted on the double-row longitudinal sliding block guide rail structure; the transverse sliding seat is installed on the lifting platform; the double-row transverse sliding block guide rail structure is installed on the transverse sliding seat; the template reversing mechanism is installed on the double-row transverse sliding block guide rail structure; a puncture template fixing piece is installed and connected to the tail end of the template reversing mechanism through a tail end steering structure; and apuncture template is installed and fixed on the puncture template fixing piece. Therefore, the positioning precision of the puncture template is improved, so that the precision of a puncture operation is improved and the operation efficiency is improved; and the change of the vertical distance between the highest position and an operation bed when different patients adopt customized puncture positions can be met.

The invention discloses an aerial seedling planting device for desert. The technical scheme is characterized in that plant seedlings are placed in a storage barrel which is located in the center of an arrow barrel, and by means of presence of an arrow tip and arrow feathers, the device can be released aloft, falls in a free and vertical manner and is inserted into sand finally; by means of a clamping device and a switch device, an upper barrel body can be ejected to be separated, is prevented from affecting normal growth of plants and can further produce thrust for the arrow tip to enable the arrow tip to be plunged deeply; finally, by means of a condensing device, when the aerial seedling planting device moves in air, moist air flows through the condensing device to produce condensate water, and the produced condensate water can meet requirements of the early growth stage of the plants. The scheme has the advantage that weight can be reduced greatly as compared with the scheme in which water is fed into the storage barrel, and massive planting is facilitated. Seedlings are planted in a desert area through aerial sowing, and massive planting and popularization are facilitated due to smaller weight of the device.

The invention discloses a shoreside inclined throwing type feeding device for aquaculture, and belongs to the technical field of aquaculture. According to the feeding device, through the arrangement of an inclined throwing assembly and self-release material storage balls, breeding personnel can continuously throw the self-release material storage balls into water of a breeding area only by standing on the shoreside to control a driving motor, the angle of an inclined throwing cylinder can be adjusted through swinging to change the falling points of the self-release material storage balls, then feeding is comprehensively conducted in the breeding area, the feeding efficiency of feed can be greatly improved, the labor cost can be effectively saved, a water contact linkage assembly is arranged, after the self-release material storage balls are thrown into water, the self-release feed storage balls can automatically release feed for feeding, a discharge pipe can face downwards all the time, outflow of the feed is facilitated, a convenient recovery assembly is arranged, the self-release feed storage balls are convenient to recover, and after the self-release feed storage balls are recovered, the self-release feed storage balls can be put into use again only by drying elastic ball bags in the sun and refilling the elastic ball bags with the feed.

The invention relates to a handle of a fishing rod, comprising a handle body, a sock socket and a tail part, wherein the sock socket is inserted and fixed into an inner cavity of the handle body and can be sleeved with the taper of a rod knob; and the tail part is arranged on the tail part of the handle body. The handle of the fishing rod is characterized in that metal patterns or / and metal characters are inlayed on the outer surface of the handle body of the fishing rod; the outer surfaces of the metal patterns or / and the metal characters are positioned on a same plane with the outer surfaceof a fishing rod body or slightly higher than or slightly lower than the outer surface of the fishing rod body; hollow-out processing is adopted among structural skeletons of the metal patterns or / andthe metal characters; and hollow positions of the metal patterns or / and the metal characters are filled with color padding. The metal patterns or / and the metal characters can not only play a balanceweight role to enable the gravity center of the fishing rod to be postpositional but also has metal luster, and is designed by being combined with the handle body; and in addition, the invention has noble, grand, natural and elegant appearance and high product level.

The invention discloses a processing method of a water-dependent permeable organic fertilizer. The processing method comprises the following steps: introducing abundant nutrient raw materials, addingriver sand and an effervescent disintegrant as fillers, carrying out dry granulation, packaging by using a prepared permeable coat, and synchronously watering during application. Depending on the permeable characteristics of water, the permeable coat absorbs water and conveys the water to the internal raw materials, the characteristic that the effervescent disintegrant is dissolved in water and then triggers a reaction is utilized, and based on the good water permeability of river sand, the raw materials can be forced to be dispersed and inflated with the elastic waterproof film on the outermost side, the elastic waterproof film is forced to bulge to form a dynamic extrusion action, and diffusion and permeation of the water are forced to be accelerated; especially in the transverse diffusion direction, after the raw materials are bulged to a certain degree, the gas carries the raw materials to escape, downward permeation of the raw materials along with water is accelerated, meanwhile,transverse diffusion water is pushed to dissolve the raw materials and then continues to permeate, and therefore the diffusion effect of the organic fertilizer in soil is improved.

A fixture for turning a thin aluminum valve plate comprises a flange bottom connected with a spindle of a digital controlled lathe. A rectangular main positioning plate of the valve plate is fixedly connected to a positioning spigot tire of the flange bottom, and is arranged deviating the center of the flange bottom right-off and downwards. The left lower corner of the main positioning plate of the valve plate is provided with a small chamfer, and the right lower corner of the main positioning plate of the valve plate is provided with a large chamfer. A longitude fixed clamping plate is arranged on the upper right edge of the outer side of the main positioning plate of the valve plate, and a transverse fixed clamping plate is arranged on the upper lower edge of the outer side of the main positioning plate of the valve plate. A longitude movable clamping plate is arranged on the left end face of the main positioning plate of the valve plate, and a transverse movable clamping plate is arranged on the upper side end face of the main positioning plate of the valve plate. The outer side faces of the longitude movable clamping plate and the transverse movable clamping plate are flush and are slightly lower than the plane to be machined of the thin aluminum valve plate. The thin aluminum valve plate is clamped radially, the fixture is safe and reliable, products have well flatness after machining, and the requirement of processing technology of the products can be guaranteed.

The invention discloses a multifunctional automatic cable winding type excavator for mining, and belongs to the technical field of engineering machinery. The excavator is characterized in that a cablewinding device is arranged on a working platform; the cable winding device comprises a bottom plate, and a supporting frame is fixed to the bottom plate; a roller is rotationally arranged on the supporting frame, and a cable inlet frame is arranged on the rear side of the supporting frame; the roller is connected with a rotating motor, and the roller is provided with a cable inlet; a cable transfer outlet power supply is arranged on the supporting frame, and the cable transfer outlet power supply supplies electric power to the excavator; a rotating conductive mechanism is arrange in the roller, and the two ends of the rotating conductive mechanism are connected with the cable inlet and the cable transfer outlet power supply; and a mine cable passes through the cable inlet frame to be connected to the cable inlet. According to the excavator, the electric power is provided through the external mine cable, and the cable winding device can unwind the cable when moving forwards and wind the cable when moving backwards, so that the situation that the cable is rolled when backward moving is performed is avoided, and workers do not need to move the cable; and excavating devices can form space dead-corner-free operation, so that the operation efficiency and the operation safety of the mining excavator are greatly improved, and the labor intensity is remarkably reduced.

The invention discloses a foldable protective guard, application and a specialized railway wagon for automobile transportation. The foldable protective guard comprises at least one group of protectiveassemblies, each protective assembly comprises a first rod which is transversely arranged, each first rod is hinged to multiple second rods, and first soft ropes are connected among the second rods;and the sides of the second rods are connected with locking devices, the locking devices comprise sliding locking plates hinged to the second rods, the sliding locking plates are provided with slidinggrooves, fixing shafts are arranged in the sliding grooves and can slide along the sliding grooves, the fixing shafts are fixedly connected with fixing seat plates, and the locking devices can drivethe second rods to be switched between an oblique state and a vertical state and lock or unlock the positions of the second rods in the two states.

The invention discloses a deviation prevention agricultural ploughing cultivating device. The deviation prevention agricultural ploughing cultivating device comprises a main rod and a ploughing mechanism, a deviation prevention connecting mechanism and a deviation prevention limiting mechanism are fixed to the main rod, and the deviation prevention connecting mechanism comprises a mounting cover,a deviation spring and a connecting block; the deviation prevention limiting mechanism comprises a movable cover, a movable frame and a supporting column, the ploughing mechanism comprises a fixed block, an electric push rod, a lifting plate and a main rotary tillage cutter, and the lifting plate is further provided with a counterweight mechanism. Through the arrangement of the cooperation of thedeviation prevention connecting mechanism and the deviation limiting mechanism, it can be effectively guaranteed that the rotary tillage cutter cannot deviate, so that furrows generated after ploughing are kept in the same straight line all the time; meanwhile, through the arrangement of the counterweight mechanism, the rotary tillage cutter does not need to be trod by people any more, the rotarytillage cutter is prevented from moving to the surface of land in the ploughing process so that the rotary tillage cutter can better plough land, and the deviation prevention agricultural ploughing cultivating device is very worthy of popularization.

The invention discloses a method for replacing a stopper rod on line for a tundish and a cross arm structure for replacing the stopper rod. The cross arm structure is characterized in that: a movable cross arm is connected on a fixed cross arm, and the end of the movable cross arm is provided with a fork head for blocking the stopper rod. The method for replacing the stopper rod on line mainly comprises the following steps of: after the movable cross arm and the stopper rod are assembled across, baking the movable cross arm and the stopper rod in an oven, and then moving the movable cross arm and the stopper rod to the lower part of a hanger; driving the tundish to a sizing nozzle to adopt sizing control; hoisting the used stopper rod out together with the movable cross arm by using the hanger; hoisting the baked stopper rod into the tundish together with the movable cross arm, and settling the bottom end of the stopper rod to the nozzle of the tundish; and adjusting the stopper rod to control the casting current of the tundish, and screwing down bolts for connecting the movable cross arm and the fixed cross arm to finish on-line replacement of the stopper rod. The service lives of the stopper rod and the nozzle can be matched, the casting cost is reduced, the service life of the tundish for casting high-quality steel can reach 72 hours under the condition of complete stopper rod control, and low-cost casting of the high-quality steel can be realized.

The invention discloses a single-guiderail double-falling prevention lift car elevator which comprises two vertical beams disposed on two opposite sides of an elevator car, wherein each vertical beam has a slide rail form and is sleeved by a constantly fixed assembly and a constantly movable assembly, the constantly movable assembly is connected to a control device of the elevator car by a sliding motor, and the constantly movable assembly is disposed on the bottom of the elevator car and gets contacted with the elevator car by an extensible strut; a displacement sensor is also disposed at a joint between the extensible strut and the elevator car; and the constantly fixed assembly is disposed on the bottom of stairs of a building and comprises an emergency control device, an emergency motor and a sliding frame body, and the displacement sensor is electrically connected to the emergency control device of the constantly fixed assembly. The single-guiderail double-falling prevention lift car elevator disclosed by the invention has the advantages that the lift car elevator can make an emergency response more quickly when the elevator slides down; and an anti-falling device can be started in time to support the elevator car, so that safety performance of the lift car elevator can be enhanced.

The invention discloses a seedling planting device for desert regions. According to the key point of the technical scheme, a seedling is put inside a placement cylinder, the placement cylinder is at the center of an arrow cylinder, due to existence of an arrow tip body and an arrow feather body, the device can release the seedling at high altitude and keep the seedling falling vertically so as to be inserted into sand finally; due to arrangement of a clamping device and a switch device, an upper cylinder is ejected, thereby not affecting normal growth of the seedling and further pushing the arrow tip body to insert deeper; finally, a condensing unit can convert wet air passing through to generate condensed water when the seedling moves in the air, and the generated condensed water can meet the early growth demand of the seedling. Compared with the scheme in which water is put into the placement cylinder, the device is reduced greatly in weight, and is suitable for mass planting. The device is used for aerial planting of seedlings in desert regions, meanwhile, is suitable for mass planting and wide spread due to the relatively light weight.

The invention discloses an IMU (inertial measurement unit) and air pressure gauge assembly and an unmanned aerial vehicle. The IMU and air pressure gauge assembly comprises a base plate, a support, damping components, an IMU block and an air pressure gauge block. An IMU module of the IMU block and an air pressure gauge module of the air pressure gauge block are arranged on the base plate. The IMUand air pressure gauge assembly and the unmanned aerial vehicle have the advantages that the IMU block and the air pressure gauge block are arranged on the same base plate, accordingly, effects of balancing the weight of the IMU block can be realized by the air pressure gauge block, damping extra balancing weights on the IMU block can be advantageously omitted, and the weight of the IMU block canbe effectively controlled; IMU damping effects can be realized by the IMU and air pressure gauge assembly on the premise that increase of extra weights is omitted.