34results about How to "Avoid overturning accidents" patented technology

The invention belongs to the technical field of pilotage, and relates to a method for safely transferring a pilot to a work boat from a pilot boat. The method comprises the steps that two parallel supports are arranged on the pilot boat; the ends of the two supports are each connected with a suspension device; the two suspension devices are connected with lifting hooks fixed to the head end and the tail end of the work boat through the ends of chain rings respectively; the suspension devices are started, so that the two ends of the work boat descend at the same time till a deck of the work boat is aligned at a deck of the pilot boat; and the suspension devices stop working. In the process that the pilot boards the work boat, the work boat is closely connected with the pilot boat and cannot shake, and therefore the pilot can safely board the work boat.

The invention discloses a stabilizing method and a stabilizing system capable of preventing overturn of a log grabbing and lifting truck, and relates to the technical field of integral truck stabilization. The stabilizing method includes: acquiring a first signal, acquiring a second signal according to characters of the first signal; according to the acquired second signal, computing and outputting overturning moments of an integral truck; comparing a longitudinal overturning moment value with a first preset anti-overturning moment value to obtain a first comparison result, and/or comparing atransverse overturning moment value with a second preset anti-overturning moment value to obtain a second comparison result; judging whether the first comparison result satisfies a first preset threshold value or not, and/or judging whether the second comparison result satisfies a second preset threshold value or not; when the first comparison result cannot satisfy the first preset threshold value, and/or the second comparison result cannot satisfy the second preset threshold value, sending an alarm signal by an integral truck controlling system. The stabilizing method and the stabilizing system have the advantages that the truck is prevented from overturning when a mechanical arm is working, and a technical effect on ensuring stability of the truck is guaranteed.

Disclosed is an elevation type superconducting magnet conveying device. The elevation type superconducting magnet conveying device is composed of a frame unit, two lifting units and four wheel units. The frame unit is the basis of the entire conveying device, the two lifting units are arranged at the front end and the rear end inside the frame unit, and the four wheel units are arranged on the left side and the right side of a vehicle body and are mounted at the tail ends of the lifting units. Due to the fact that rotating shafts of the lifting units are rotated, the center of the gravity of the vehicle body can be lifted, the position of the vehicle body can be changed, and the wheel units are driven by a DC servo motor.

The invention relates to the field of engineering machines and particularly relates to a loading device applied to drilling machines. The loading device comprises a chassis, telescopic devices and support arms which are arranged under a drilling machine platform, wherein sliding grooves are fixedly arranged at the front end and the rear end of the chassis; one end of each support arm stretches into one sliding groove from a groove opening of the sliding groove; a connection block arranged at one end away from the sliding groove of each support arm is fixedly connected with one telescopic device; telescopic rods are arranged in each telescopic device; cushion blocks are arranged at the ends of the telescopic rods; the support arms are pulled out from the sliding grooves before using, then hydraulic modules are adjusted to control up-and-down motion of the telescopic rods in the telescopic devices, so that a crawler-type drilling machine is capable of automatically rising and falling andcooperates with a transportation vehicle to achieve automatic loading and unloading during loading and unloading.

The invention provides a safety protection device for a lifting platform. The safety protection device comprises a plurality of paired pressure sensors, each of which is mounted on a wire rope for lifting the lifting platform to sense the pull of the wire rope when the lifting platform is elevated, inclinometers disposed at edges of the lifting platform to detect an angle of inclination of the lifting platform, and a safety protection controller connected with the pressure sensors and the inclinometers and used to obtain load data of the lifting platform according to the pull data of the wire ropes from the pressure sensors, and in response to that any one of the load data and the angle of inclination of the lifting platform measured by the inclinometers exceeds a set range, transmit a warning signal to a buzzer and send a safety control signal to a motor controller for the lifting platform to control start and stop of a motor. The pressure sensors are pressuremeter type pressure sensors. The safety protection device provided by the present invention is capable of warning in case of overload, eccentric load and inclination of the platform, thereby improving the use safety of the lifting platform.

The invention relates to an anti-overturning device for a single-pier bridge. The anti-overturning device is installed between a bridge girder and a pier stand column and comprises viscous dampers, ahinge support and chemical anchor bolts. The hinged support is anchored on the bridge girder and the bridge pier stand column, viscous dampers are installed at the two sides of the bridge girder and the two sides of the bridge pier stand column, and the bridge girder is connected with the pier stand column through the viscous dampers. By additionally arranging the viscous dampers between the bridge girder and the pier stand column, the bridge girder can be effectively prevented from overturning, and the overturning resistance of the single-pier bridge is improved. The anti-overturning device is simple in structure, is convenient to construct, and has the good economical efficiency.

The invention relates to an anti-overturn undercarriage structure of an unmanned aerial vehicle. The anti-overturn undercarriage structure comprises a circular base ring, wherein an unmanned aerial vehicle main body is arranged in the center of the base ring; the base ring and the unmanned aerial vehicle main body are connected through a plurality of arc-shaped rods which are uniformly arranged along the center of the base ring; outward bending arc-shaped connecting ends far away from the center of the base ring are arranged at the lower ends of the arc-shaped rods, and fixedly connected with the base ring; the base ring and an unmanned aerial vehicle frame are connected through a plurality of inclined supporting rods which are uniformly arranged along the center of the base ring. The anti-overturn undercarriage structure wholly adopts a circular bracket, so that accidents at takeoff and landing of the unmanned aerial vehicle can be well avoided; through the adoption of the anti-overturn undercarriage structure, the unmanned aerial vehicle can more quickly find the center axis while landing so as to avoid overturn accidents.

The invention discloses a foundation pit support and construction road integrated structure and a construction method. The integrated structure is an integral structure formed by a foundation pit support structure and a construction road, wherein the foundation pit support structure comprises a plurality of rows of steel pipe piles; the steel pipe piles are inserted into a soil body around a foundation pit; the upper portions of the adjacent steel pipe piles are connected through a structural layer of the construction road; and the upper portions of the steel pipe piles and the structural layer of the construction road form the integral structure. The construction method comprises the steps that firstly, a site is leveled; secondly, surveying and setting out are carried out; thirdly, the steel pipe piles are driven in; fourthly, a first sleeve is sleeved; fifthly, a cover plate and a second sleeve are installed; sixthly, the structural layer of the construction road is poured; and seventhly, a top cover is arranged in a covering manner. The foundation pit support and construction road integrated structure and the construction method have the beneficial effects that the operation form of support excavation is adopted in construction, and the construction period can be effectively shortened. The adopted steel pipe piles, the sleeves, the cover plate and the concrete top cover areall detachable, easy to manufacture and convenient to transport, and development of adjacent underground space is not affected.

The invention discloses a crane supporting leg device capable of detecting a foundation state, and relates to the technical field of engineering construction. The device comprises a supporting leg and a supporting leg base plate, wherein a detection plate is arranged between the supporting leg and the supporting leg base plate, an induction iron sheet is annularly arranged on the supporting leg base plate, at least two electromagnetic induction switches used for detecting the induction iron sheet are arranged on the detection plate, and an ultrasonic generating probe and an ultrasonic receiving probe which can extend downwards are mounted at the bottom of the supporting leg at an interval, are respectively connected with the supporting leg through a spring, and can be inserted into a foundation or abut against the surface of the foundation. According to the invention, the supporting state of the supporting leg of the engineering crane and the foundation state can be rapidly detected before the engineering crane is lifted, so that an overturning accident caused by insufficient counter force of the supporting leg is prevented to a great extent.

The invention belongs to the technical field of air traffic control radars, and particularly relates to an octave rain-proof adjusting component and an air traffic control radar antenna elevation mechanism employing the same. The adjusting component comprises a bottom support shaft, a middle rotary thread sleeve and a top rainproof sleeve, which are coaxially sleeved one by one, wherein the top rainproof sleeve is in a sleeve structure of which an opening is downward; and the middle rotary thread sleeve can carry out rotary motion along the axis, so that the bottom support shaft and the top rainproof sleeve carry out axially opposite or separate synchronous screw-thread fit motion. Compared with a traditional structure, the component has smaller minimum length and longer jacking stroke when having extremely high rain-proof capability; and the working performance can be significantly improved. Meanwhile, the invention provides the air traffic control radar antenna elevation mechanism employing the adjusting component. The air traffic control radar antenna elevation mechanism structurally comprises a three-point support system comprising two groups of octave rain-proof adjusting components and a group of hinge seats, so that the maintenance frequency of the existing air traffic control radar antenna elevation mechanism is significantly lowered.

The invention provides a crane supporting leg device capable of achieving detection of a foundation state, and relates to the technical field of engineering construction. The crane supporting leg device comprises a supporting leg and a supporting leg base plate, and a detection plate is arranged between the supporting leg and the supporting leg base plate; an induction iron sheet is annularly arranged on the supporting leg base plate, and at least two electromagnetic induction switches used for detecting the induction iron sheet are arranged on the detection plate; an ultrasonic generating probe and an ultrasonic receiving probes which can extend downwards are installed at the bottom of the supporting leg at intervals, and each connected with the supporting leg through a spring separately;and the ultrasonic generating probe and the ultrasonic receiving probe can be inserted into a foundation or abut against the surface of the foundation. According to the crane supporting leg device, the supporting state and the foundation state of the supporting leg of an engineering crane can be rapidly detected before hoisting of the engineering crane, and overturning accidents due to insufficient counterforce of the supporting leg are prevented to a great extent.

An overturning test system for an overhead contact system maintenance vehicle (1), the system comprising: at least one set of rails (2), a connecting rope (3), a first sensor (41), and at least one second sensor (42); the rail set (2) comprises mutually parallel first rail (21) and second rail (22); the second rail (22) is higher than the first rail (21); one end of the connecting rope (3) is fixedly connected to the supporting arm (12) of the overhead contact system maintenance vehicle (1), and the other end of the connecting rope (3)is fixedly connected to the ground or wall surface of the test ground; the first sensor (41) is disposed on the connecting rope (3), and used to measure tensile force on the connecting rope (3); the second sensors (42) are respectively and fixedly disposed on the rail set (2), and used to measure the pressure on the rails (21, 22) by the wheels of the overhead contact system maintenance vehicle (1). The overturning test system for an overhead contact system maintenance vehicle conducts an overturning test on the overhead contact system maintenance vehicle so as to test whether the anti-overturning performance of the overhead contact system maintenance vehicle satisfies requirements in the operating environment, avoiding an overturning accident in later use, and economic loss.

The invention relates to the field of intelligent speed control, in particular to a vehicle body overturning prevention control system and method by electronic differential of dual direct current motor driver. The problem of steering safety of a vehicle body under the driving of a two-motor direct current mode is solved. According to the steering process of the vehicle body, the load characteristics of a two-way motor are controlled in real time to be quantified, the collected data is used for analyzing whether the vehicle body has the danger of overturning or not according to the quantized data by a formula; when the vehicle body is about to overturn, the speeds of Speed<1> and Speed<2> of the vehicle body are reduced by f([delta]X), the parameters calculated by [delta]X are added; and inthe differential process, the vehicle body stabilization of the vehicle body can be optimized according to the changes of data parameters. The stability of the vehicle body operation in a two-motor direct current driver using the algorithm can be improved, and the risk of overturning of the vehicle body can be reduced. The vehicle body overturning prevention control system and method ensure the maximum advance speed while ensuring anti-overturning during cornering, so that the vehicle body is safer, more flexible and more efficient. The vehicle body overturning prevention control system and method are mainly applied to the intelligent control over the vehicle body speed.