46results about How to "Avoid rail gnawing" patented technology

The invention provides a bridge and portal crane trolley walking deviation rectifying and rail gnawing prevention device. The bridge and portal crane trolley walking deviation rectifying and rail gnawing prevention device comprises two sets of information acquiring devices, a main control unit and a flexible landing leg walking control frequency converter, wherein the two sets of information acquiring devices are used for measuring the actual walking distance of a flexible landing leg of a crane, the actual walking distance of a rigid landing leg of the crane and the space values of wheel flanges at the two ends of each landing leg and a track; the main control unit is connected with the two sets of information acquiring devices and generates a flexible landing leg control instruction according to the actual walking distance of the flexible landing leg, the actual walking distance of the rigid landing leg and the space values of the wheel flanges at the two ends of each landing leg andthe track; and the flexible landing leg walking control frequency converter is connected with the main control unit and controls the walking speed of the flexible landing leg according to the flexible landing leg control instruction. The invention further provides a deviation rectifying and rail gnawing prevention method. It can be guaranteed that the walking deviations of the two sides of the crane and the space between the wheel flanges and the track are in the tolerance range, and the rail gnawing phenomenon is avoided. The bridge and portal crane trolley walking deviation rectifying and rail gnawing prevention device and method have the advantages that the design is scientific, practicality is high, the structure is simple, and measuring is accurate.

The invention provides a rail gnawing prevention walking device self-adaptive to a rail gauge and wheel pressure. The rail gnawing prevention walking device comprises a first rail, a second rail, a driving trolley and a driven trolley. Two cross beams with sliding grooves are further arranged between the driving trolley and the driven trolley, and electric hoists are further arranged on the cross beams with the sliding grooves. The driving trolley is suspended on the first rail through a first bearing wheel, and the driven trolley is suspended on the second rail through a second bearing wheel. The driving trolley is fixedly connected with hole grooves in the cross beams with the sliding grooves through a first bolt set, and the driven trolley is movably connected with the sliding grooves in the cross beams with the sliding grooves through a double-end stud set. The electric hoists are fixed to a sliding frame through a second bolt set, and the sliding frame is in sliding connection with the sliding grooves through a T-shaped bolt set. The driving trolley is connected with a driving motor and drives the driven trolley to move synchronously through the cross beams with the sliding grooves, and the electric hoists are driven to move synchronously. By means of the technical scheme, potential safety hazards of rail gnawing and derailing of the walking device can be eliminated, and the running reliability and stability of the walking device are improved.

The invention relates to rail gnawing preventing devices, crown blocks and traveling methods, belongs to the technical field of bridge girder erection machines, and particularly relates to a rail gnawing preventing device for a hanging beam crown block, the hanging beam crown block and a traveling method thereof. The rail gnawing preventing device comprises a connecting cross beam and a central hinge shaft, wherein the two ends of the connecting cross beam are connected with hinge supports of a trolley, one end of the central hinge shaft is fixedly connected with the middle of the cross beam, and the other end of the central hinge shaft extends into a connecting hole in the middle of a vehicle frame end beam. In order to guarantee that the longitudinal moving trolley is stressed in a balanced mode and adapts to sidewise bending deformation of a bridge girder erection machine arm, the middle of the crown block vehicle frame end beam is connected with the longitudinal moving trolley through the central hinge shaft, and the end of a vehicle frame main beam is directly supported on the longitudinal moving trolley. The rail gnawing preventing device can be automatically adjusted to adapt to rail gnawing, automatically release the sidewise action force between wheels and rails, and avoid long-time rail gnawing.

The invention belongs to the technical field of cranes, and discloses a crane operation mechanism rail gnawing prevention device, a crane operation mechanism rail gnawing prevention deviation rectification control system, and a crane operation mechanism rail gnawing prevention deviation rectification control method. A plurality of first displacement sensors and a plurality of second displacement sensors are connected with a computer, the deflection angle of a crane frame relative to a rail is measured out by the displacement sensors, and then the deflection angle is converted into control voltage via proportional conversion through the computer; the control voltage is correspondingly added on first frequency converters and second frequency converters by a differential-action mode or a single-action mode, the first frequency converters and the second frequency converters are correspondingly connected with first control motors and second control motors, and the first control motors and the second control motors correspondingly adjust the stroke speed of a first driving wheel and the stroke speed of a second driving wheel. Rail gnawing between the inner side of a wheel flange of a wheel of an operation mechanism and the steel rail is effectively avoided, the stability of the crane in the operation process is enhanced, the operation side friction resistance of the crane is reduced,and friction noises between the wheel and the rail are reduced. Simultaneously, great potential safety hazards brought by the rail gnawing are eliminated, and safe operation of crane equipment and people safety are effectively ensured.

The invention provides a calibration method for an unmanned vehicle. The method specifically comprises the steps of carrying out translation of two sides of the unmanned vehicle on a first track and a second track, and obtaining a distance L from the unmanned vehicle to a reference point; when the unmanned vehicle moves to the first mark point, obtaining the distance L1 from the unmanned vehicle to the reference point at the moment; comparing (L1-Ls1) with [delta]1, wherein Ls1 is the distance from the first mark point to the reference point, [delta]1 is the maximum position calibration error allowed by the unmanned vehicle, if (L1-Ls1) is less than or equal to [delta]1, calibration is not needed, and if (L1-Ls1) is greater than [delta]1, the calibration distance Ls from the unmanned vehicle to the reference point is equal to L-(L1-Ls1); when the unmanned vehicle further moves to the second mark point, obtaining the distance L2 from the unmanned vehicle to the reference point at the moment; and comparing [L2-(L1-Ls1)] with [delta]s1, wherein [delta]s1 is the maximum test error, if [L2-(L1-Ls1)] is less than or equal to [delta]s1, a calculation formula Ls = L-(L1-Ls1) is stored, and if [L2-(L1-Ls1)] is greater than [delta]s1, an alarm is prompted to be given. The method has the advantages of accurate positioning and the like.

The invention discloses a traversing type double-trolley system. The system comprises an upper trolley and a lower trolley, wherein the lower trolley comprises a first walking mechanism and a second walking mechanism mounted on guide rails at two sides of the upper trolley in a walking manner, a rigid frame for connecting the first walking mechanism and the second walking mechanism, and a sling connected below the rigid frame; the rigid frame is provided with a structure space with the cavity size greater than the outer wall size of the upper trolley so as to allow the upper trolley to pass, and the lower trolley meets the condition that the stabilizing moment Sigma Ms of the lower trolley is greater than capsizing moment Sigma Mo; the first walking mechanism is connected with the second walking mechanism through the rigid frame; the structure space size of the rigid frame is greater than the outer wall size of the upper trolley, so that the upper trolley sling carrying a tank can directly pass through the structure space without rotating; under the condition that the stabilizing moment Sigma Ms caused by the gravity of the lower trolley is greater than the capsizing moment Sigma Mo caused by horizontal inertia force of the lower trolley, the capsizing moment Sigma Mo caused by wind load or other reasons is overcome under the effect of the stabilizing moment of the lower trolley, so that the lower trolley always maintains steady in the operational process.

The invention discloses a rail-gnawing preventing end beam device and hoisting equipment, and belongs to the technical field of hoisting equipment. The rail-gnawing preventing end beam device comprises an end beam body and a guiding mechanism. The end beam body comprises wheels rotationally arranged on the end beam body, and the wheels roll along a guide rail, namely the end beam body can move along the guide rail. The guiding mechanism comprises a box, a transmission shaft, a transmission wheel and a transmission rail. The box is arranged on one side of the end beam body, internally and rotationally provided with the transmission shaft and arranged at one end of the transmission shaft in a sleeving mode. The transmission wheel is configured to move on the transmission rail, and the transmission rail and the guide rail are arranged parallelly. The transmission shaft drives the transmission wheel to move on the transmission rail so that the wheels on the end beam body can move on the guide rail, and accordingly, the end beam device moves on the guide rail; and through matching of the transmission wheel and the transmission rail, the end beam body can be guided so as to enable the wheels and the guide rail not to make contact, and the rail-gnawing phenomenon is prevented effectively. The invention further provides the hoisting equipment applying the rail-gnawing preventing end beam device

The invention discloses an energy-saving quayside container crane system provided with crossing type double trolleys. The energy-saving quayside container crane system comprises an upper trolley, a lower trolley and potential energy compensation systems, wherein the upper trolley and the lower trolley are mounted on a girder structure; each potential energy compensation system comprises a counterweight, a potential energy compensation winding system and a potential energy compensation steel wire rope, and the potential energy compensation winding system is used for transmitting driving force to lift and drop the counterweight; each potential energy compensation system further comprises a lifting winding drum allowing joint winding of a lifting steel wire rope and the potential energy compensation steel wire rope; the winding positions of each compensation steel wire rope and each lifting steel wire rope on the hoisting winding drum do not interfere with each other and are opposite; and the potential energy compensation systems comprise an upper trolley potential energy compensation winding subsystem and a lower trolley potential energy compensation winding subsystem. According to the system, forward torque generated by dead weight of lifting appliances is offset by backward torque generated by the counterweights, the overall energy consumption of the quayside container crane is reduced, further, one lifting winding drum is shared by each compensation steel wire rope and the corresponding lifting steel wire rope, accordingly, the structure is simplified, the cost is reduced, and rope winding is relatively simple and easy to achieve; and the potential energy compensation systems comprise the upper trolley potential energy compensation winding subsystem and the lower trolley potential energy compensation winding subsystem, so that the lifting appliances of the upper trolley and the lower trolley are compensated respectively.

The invention discloses a novel lower trolley system. The system comprises first and second traveling mechanisms capable of traveling along first and second guide rails installed on a shore bridge girder, a rigid frame for rigidly connecting the first and second traveling mechanisms and a lifting appliance, wherein the rigid frame has a structural space through which an upper trolley passes, and a lower trolley meets the following condition: the stabilizing moment sigmaMs caused by the gravity of the lower trolley is larger than the capsizing moment sigmaMo of the horizontal inertia force of the lower trolley. The first and second traveling mechanisms of the lower trolley are rigidly connected with the lifting appliance, and when the stabilizing moment sigmaMs is larger than the capsizing moment sigmaMo, the lower trolley travels stably. During movement of the lower trolley, the lifting appliance and containers cannot shake easily, the lower trolley can travel stably, and abrasion between the first and second traveling mechanisms and the shore bridge girder is reduced; stable traveling consumes lower power than shaking traveling, and the loading and unloading efficiency of a whole shore bridge system is improved; compared with shaking traveling, stable traveling has advantages that the safety is improved, and potential risks are fewer.

The invention discloses a gantry crane with a cart capable of walking on a curved rail and a walking control method thereof. The gantry crane comprises a portal frame and a cart walking mechanism. The cart walking mechanism comprises a first walking wheel, a third walking wheel, a second walking wheel and a fourth walking wheel, wherein the first walking wheel and the third walking wheel are mounted on the lower portions of the front side and the rear side of each left supporting leg respectively, and the second walking wheel and the fourth walking wheel are mounted on the lower portions of the front side and the rear side of each right supporting leg respectively. The external diameter of the first walking wheels and the external diameter of the fourth walking wheels are both D1, the external diameter of the second walking wheels and the external diameter of the third walking wheels are both D2, D1 / D2=R, and r1 and R1 are the radius of an inner side circular arc rail and the radius of an outer side circular arc rail. The walking control method includes the steps that first, walking is achieved on a current rail section, and the specific processes comprise rail section shape judging, straight line rail section walking and circular arc rail section walking; second, the step one is repeated again and again until the walking process of the walking rail is completed. According to the gantry crane with the cart capable of walking on the curved rail and the walking control method thereof, the structure is simple, the design is reasonable, installation and arrangement are convenient, using operation is simple and convenient, the using effect is good, the cart can walk on the curved rail, and rail gnawing can be avoided.

The invention discloses an operating mechanism for a double-track trolley group of a super-large gantry crane, which includes a balance beam and a double-track trolley, and is characterized in that the double-track trolley is composed of four wheels composed of running wheels and driven wheels symmetrically arranged on both sides of the frame Double-drive mechanism, the double-track trolley is fixed at both ends of the balance beam by the hinge shaft, and the double-track trolley is hinged to the balance beam; the frame is an "I"-shaped box structure; The driving wheel of the mechanism, and the driving mechanism make the traveling wheel and the driven wheel drive the trolley group composed of two double-track trolleys to run on the track. Compared with the prior art, the present invention has the advantages of small running wheel pressure and good uniform distribution, which greatly weakens the lateral force, effectively avoids the phenomenon of rail gnawing, increases the working range, reduces the working blind area, and further reduces the construction cost. The structure is simple, which greatly facilitates the maintenance and maintenance of the equipment.

The invention relates to a horizontal wheel rail gnawing preventing device for a two-force rod system. The technical scheme is as follows: the device comprises four two-force rod mechanisms with the same size and structure, and the four two-force rod mechanisms are symmetrically fixed on four corners of a bridge girder (1). Each two-force rod mechanism is composed of a fixed frame set and a horizontal wheel set, wherein the fixed frame set comprises a box-shaped fixed frame (2), a pressing frame (3) and a compression spring (15); the horizontal wheel set comprises a horizontal wheel (4), a bearing (8), an eccentric transparent cover (9), an adjustable pad (10), a wheel axle (12) and a shaft sleeve (13). The box-shaped fixed frame (2) is fixed on web plates at two sides of the bridge girder (1); the pressing frame (3) slides inside the box-shaped fixed frame (2) through the compression spring (15); and the horizontal wheel (4) is fixed on the pressing frame (3) through the bearing (8), the wheel axle (12) and the eccentric transparent cover (9). By using the horizontal wheel rail gnawing preventing device, the precise guide for the operation of a crane is realized; and a track (5) is in flexible contact with the horizontal wheel (4), thus the wheel rail gnawing phenomenon is effectively avoided. The horizontal wheel rail gnawing preventing device has the characteristics of simple structure, easiness for maintenance, strong stability and long service life.

The patent of the present invention belongs to the field of double-girder crane devices, and specifically discloses a micro-deformation detection device for a double-girder crane trolley, including: laser transmitters and photosensitive receiving lattices respectively installed at both ends of the steel beams on each side of the double-girder crane trolley. The photosensitive receiving dot matrix includes a plurality of photosensitive triodes, and the photosensitive triodes are connected with a microcontroller through an interface circuit; the interface circuit is an AND circuit connected in parallel by a plurality of diodes; the microcontroller according to the According to the laser light signal received by the photosensitive receiving dot matrix, the position information of multiple laser irradiation points is obtained; and according to the position information and the distance between adjacent photosensitive three-stage tubes, the offset distance information of the corresponding laser irradiation point is obtained; and according to The offset distance information obtains the offset angle information of the corresponding laser irradiation point. Through the above technical proposal, the present invention accurately detects the micro-deformation of the double-girder crane trolley, and avoids the rail gnawing phenomenon of the crane trolley.