56results about "Track maintainence" patented technology

The embodiment of the invention discloses a construction quality control method and device for a high-speed hydraulic rammer compactor and a medium, and relates to the technical field of high-speed hydraulic rammer compactors. The method comprises the steps that through a plurality of sensors arranged on the high-speed hydraulic rammer compactor, a plurality of ramming acceleration signals corresponding to each ramming point in the point ramming process are collected, on the basis of the multiple tamping acceleration signals, the point tamping compaction state corresponding to each tamping point is determined; determining supplementary ramming areas, performing reinforcement in each supplementary ramming area according to a preset ramming strategy, and determining a real-time compaction index corresponding to the first ramming point; and when the real-time compaction index does not meet the preset index threshold value, the tamping strategy is adjusted according to the preset adjustment step length, the adjusted tamping strategy is determined, the supplementary tamping area is reinforced according to the adjusted tamping strategy, and the dynamic matching between the reinforcing parameters and the specific soil state is ensured, so that the tamping effect is improved. And the uniformity and reliability of the reinforcing quality are fundamentally guaranteed, and the problem that under-compaction and over-compaction coexist is effectively avoided.

The utility model belongs to the technical field of track dotting machines, and particularly relates to a lithium battery track dotting machine. Comprising a rack which comprises a fixed frame and a folding frame; two walking wheels are distributed at the bottom of each folding frame; the pressure barrel and the air compressor are both installed on the fixing frame, paint is contained in the pressure barrel, the output end of the air compressor is communicated with an air inlet of the pressure barrel, and the paint spraying end of the pressure barrel is communicated with a nozzle; the nozzles are arranged on the left side and the right side and spray paint towards the inner side face of the track. And the step counting wheel is installed on the folding frame on any side through a support so that the step counting wheel can walk along the track, and an encoder is installed at the shaft end of the step counting wheel. The device has the advantages of being small in error, full-automatic, capable of improving operators and the surrounding working environment, capable of rapidly going up and down, free of a large amount of manpower and capable of achieving accurate and rapid operation.

The utility model discloses a safety warning device for railway track operation. The safety warning device comprises a supporting frame, a wire coil and a light-emitting warning line. The supporting frame comprises a fixed base and a supporting rod, and the fixed base is used for being fixed to a sleeper. The supporting rod comprises a first rod body and a second rod body, the first rod body is fixed to the fixed base, the second rod body is rotationally connected with the first rod body, and a hook is arranged at the top end of the second rod body. The wire coil is installed on the second rod body, and the light-emitting warning line is wound on the wire coil and pulled out through a hook at the top end of the second rod body. The railway track operation safety warning device is supported through the supporting frame, and the serious consequence of line invasion caused by the fact that the luminous warning line is affected by strong wind and blown into an adjacent line can be avoided. Meanwhile, the light-emitting warning line can emit light and can achieve a clear visible effect at night or in an environment with low visibility, so that the safety consciousness of field operators is improved, the operators are prevented from entering adjacent lines by mistake, and labor safety accidents of the operators are prevented.

The invention relates to the technical field of roadbed construction, in particular to a cleaning and finishing method for a red-layer mudstone roadbed bridge abutment transition section base, which comprises the following steps: S1, cleaning the surface of a foundation bed; s2, surveying and setting out; s3, layered excavation is conducted on the transition section, excavation is conducted to the unweathered rock layer face base, and a plurality of steps from the bridge abutment to the foundation bed are formed; s4, step finishing is conducted, specifically, concrete materials are adopted for finishing each step; and S5, performing layered backfilling. The steps are formed through excavation after the surface layer of the foundation bed in the transition section is cleaned, concrete material finishing is conducted on each step, it can be ensured that the structure of the area where each step is located is stable, the bearing capacity meets the design requirement, overall improvement of the stability of a base in the transition section is achieved, meanwhile, the lower steps play a role in stabilizing the upper steps along the slope face of the transition section, and the stability of the base is improved. A stable slope surface is formed in the transition section, landslide settlement is not prone to occurring in the operation period, an abutment is not prone to being affected, the overall stability of a roadbed is ensured, and the settlement occurrence probability is reduced.

This utility model belongs to the field of roadbed maintenance technology and discloses a roadbed correction device, comprising N grouting bladders connected in sequence and N grouting pipes corresponding one-to-one with each grouting bladder, where N≥2. Each grouting bladder includes a bladder body and a supporting pipe. The bladder body is a through structure with openings at both ends, sleeved outside the supporting pipe, and both ends of the bladder body along the axial direction of the supporting pipe are sealed to the pipe wall. The N supporting pipes are connected in sequence. Among the multiple grouting pipes, the first grouting pipe communicates with the grouting port of the first bladder, the second grouting pipe passes through the first supporting pipe and communicates with the grouting port of the second bladder, and the Nth grouting pipe simultaneously passes through the first, second, ..., and (N-1)th supporting pipes and communicates with the grouting port of the Nth bladder. This utility model achieves precise correction of the roadbed, avoids damage to the roadbed structure, generates no pollutants, and is highly adaptable.

To provide a construction method of a waterproof structure capable of securing waterproof performance, shortening construction time at a construction site, and reducing material loss.SOLUTION: A construction method of a waterproof structure includes a primer coating step of coating a primer 2 on a surface of a concrete structure 9, an adhesive material installation step of coating an adhesive material 3 on the primer 2, and a top coating material coating step of coating the top coating material 4 on the adhesive material 3. The crack follow-up property is ≥ 0.8 mm measured by a crack follow-up property test method (proposal) of JSCE-K352 surface coating material. The crack followability of the top coating material is equal to or more than the crack followability of the adhesive material. In the adhesive material installation step, the adhesive material obtained by mixing a main agent and a curing agent is applied and cured.SELECTED DRAWING: Figure 1

The application discloses a light-type straddle-type monorail cast-steel tension support anchor rod replacement device, which comprises a track beam and a cast-steel tension support arranged at the end of the track beam. The light-type straddle-type monorail cast-steel tension support anchor rod replacement device comprises the following steps: S1, preliminary preparation and equipment inspection; S2, removing attachments and installing tooling; S3, synchronously jacking up the track beam and arranging temporary supports; S4, replacing the anchor rod; S5, falling back the track beam and three-dimensional fine adjustment; and S6, resuming the site and leaving the site. The application sets an anti-overturning baffle in the existing bolt hole, realizes the combination of temporary reinforcement and permanent structure, and can effectively resist the overturning risk; the modular small equipment is adopted, the operation can be conducted in a limited space, and large hoisting machinery is not needed; and the millimeter-level accurate jacking and locking are realized through the electric control synchronous hydraulic jack, and the three-dimensional fine adjustment device can realize rapid resetting.

The utility model discloses a reciprocating type cableway pulling cable changing and braiding platform which comprises a plurality of frame assemblies, a plurality of connecting assemblies and a plurality of grid plates, each frame assembly comprises a top rod, two side rods and a bottom rod, connecting mechanisms are arranged between the top rods and the side rods, and right-angle blocks are arranged between the side rods and the bottom rod. The side rods are perpendicular to the bottom rods and fixedly connected with the right-angle blocks through bolts, hooks are arranged at the four corners of the grid plate, and the hooks are clamped on the adjacent bottom rods respectively. The connecting assembly comprises two U-shaped buckles and a mounting plate, the lower surface of the mounting plate is provided with clips which are fixedly connected through bolts up and down, and the four corners of the mounting plate are in threaded connection with the U-shaped buckles and are fastened through nuts. The connecting assembly has the advantages that the structure is simple, the high-altitude mounting operation is easy, the number of mounting assemblies is small, the mounting assembly is light, and the mounting and transportation difficulty is reduced.

The application discloses an automatic spraying manipulator for a railway and relates to the field of spraying manipulators.The automatic spraying manipulator comprises a moving base plate, the top end of the moving base plate is provided with a supporting platform, the top end of the supporting platform is provided with an angle and position adjusting mechanism, the angle and position adjusting mechanism comprises a translation sliding rail, the top end of the supporting platform is provided with the translation sliding rail, the inside of the translation sliding rail is clamped with a positioning screw rod, the outside of the positioning screw rod is sleeved with an internal thread cylinder, the angle and position adjusting mechanism is arranged, the internal cross cylinder, the cross rotating rod, the transmission adjusting rod, the transmission ring, the transmission gasket and the plane gear are matched to form a transmission assembly, power is transmitted, the driving motor is convenient to drive the worm to rotate, the worm wheel, the rotating tray and the intelligent sensing manipulator are further pushed to rotate, the angle of spraying is adjusted according to needs, the adaptability is improved, paint is convenient to spray from different angles, and dead angles are prevented from being missed.

The utility model provides a secondary jacking device for mechanical equipment and the mechanical equipment, the secondary jacking device comprises a lifting assembly and a shielding frame, the lifting assembly is used for being arranged on a ceiling of the mechanical equipment, the shielding frame comprises a first frame and a shutter assembly, the first frame and the ceiling of the mechanical equipment are arranged in a spaced mode, and the first frame is connected to the lifting assembly; the first frame is provided with a first frame exhaust port, the first frame exhaust port is communicated with a ceiling exhaust port in the ceiling, the shutter assembly is arranged on the first frame and used for closing or conducting the first frame exhaust port, and the lifting assembly can drive the shielding frame to do lifting motion so as to adjust the distance between the shielding frame and the ceiling exhaust port. The secondary jacking device for the mechanical equipment can adapt to different mechanical equipment and is provided with the lifting assembly, the height can be adjusted according to the requirements of different vehicle types and different working conditions, the first frame exhaust port is formed in the shielding frame of the secondary jacking device, the exhaust efficiency can be improved, and the secondary jacking device can be closed in rainy days to avoid rainwater invasion.

The present invention relates to a method for the rehabilitation and / or stabilization of a track bed (1), wherein railway rails (3a, 3b) are attached to sleepers (2) and the sleepers (2) are arranged in or on the track bed (1) and stones, ballast (8) or the like are located in the track bed (1), wherein the rehabilitation and / or repair is carried out in the track bed (1) itself without detaching the sleepers (2), the rails (3a, 3b), and / or without removing the sleepers (2) from the track bed (1), wherein the sleepers (2) have a central section and two end sections, and the central section is located between the two end sections, wherein a continuous opening (4) is produced through the sleeper (2) in the region of the first end section and / or the second end section and / or the central section, preferably the opening (4) is produced by a bore, wherein a material, preferably an injection resin, is injected into the opening (4) or openings.which solidifies or hardens after application, wherein the injection resin, when injected through the opening (4) in the sleeper (2), enters the area below the sleeper (2) in the track bed (1) and there wets the track bed material, namely stones, ballast (8) or the like, and fills gaps and / or cavities in the track bed (1), and after the injection resin has solidified, the area of ​​the track bed (1) that is wetted by the injection material, or whose gaps and / or cavities are filled, forms a compact body (15) on which the sleeper (2) rests.

It also facilitates the movement of heavy objects such as rails and sleepers. [Solution] The left and right pair of foldable tower sections 12L and 12R are provided on the rail transport vehicle body 11 via a horizontal rotation axis so as to be able to stand up and fold down in the longitudinal direction of the track rail, and the upper foldable tower sections 12L2 and 12R2 are provided on the upper part of the lower foldable tower sections 12L1 and 12R1 via horizontal rotation mechanisms 12L3 and 12R3 so as to be able to rotate with the longitudinal direction of the lower foldable tower sections 12L1 and 12R1 as the axis of rotation. By rotating the upper foldable tower sections 12L2 and 12R2 relative to the lower foldable tower sections 12L1 and 12R1 via the horizontal rotation mechanisms 12L3 and 12R3 of the lower foldable tower sections 12L1 and 12R1, not only rails but also heavy objects such as sleepers can be moved.

The application discloses a kind of vehicle-mounted rail bolt oiling operation method, when carrying out oiling operation, locking mechanism is operated and controlled to perform unlocking action, after unlocking, lifting mechanism is operated by control system, and detection executing mechanism is lowered to operation position.In the process of rail engineering vehicle, pressurizing device is sucked from the grease tank and pressurized to the required pressure.When the sleeper bolt detection sensor detects the sleeper bolt, a signal is sent to the control system, and the control system determines the delay time according to the collected vehicle speed, and outputs a signal after the delay time, and controls the spray gun to open.The high-pressure grease is sprayed onto the sleeper bolt through the spray gun, and the amount of grease sprayed is adjusted by controlling the spraying time.The application can solve the technical problems that the existing oiling operation method cannot effectively spray the rail bolt in all directions, and the oiling operation quality is not high.

The application belongs to the technical field of railway construction, and particularly relates to a protective fence positioning support device, which comprises a transfer frame for hoisting and suspending a protective fence stand from one side of a pre-buried pit into the pre-buried pit and a fixing frame capable of being inserted into the transfer frame from the back side to replace the transfer frame for supporting the stand, a horizontal bubble for leveling is arranged on the transfer frame, height-adjustable quick-change pads are arranged at four corners of the bottom of the transfer frame, a locking assembly is arranged on the quick-change pad, and the locking assembly is switched from a state of locking the transfer frame to a state of locking the fixing frame when the fixing frame supports the stand. Through the cooperation of the moving frame and the fixing frame, the positioning operation of the protective fence stand can be efficiently and conveniently carried out, and the inconvenience problem of the stand in the prior art when being suspended and positioned is solved.

The invention provides a detection and treatment method for water leakage of a rail transit steel spring ballast bed. The detection method for the water leakage of the rail transit steel spring ballast bed comprises the steps that partition flow monitoring is conducted on a steel spring ballast bed drainage system, and a potential leakage area is positioned; the spatial position of a leakage point is detected through electromagnetic wave reflection characteristics; and an endoscope system is adopted for visual verification. The treatment method for the leakage water of the rail transit steel spring ballast bed comprises the steps that the leakage grade is obtained on the basis of the method, and grouting treatment is carried out.

The embodiment of the invention discloses a track maintenance method and system based on an intelligent fuel injection vehicle. According to the technical scheme provided by the embodiment of the invention, through introduction of bolt historical state comparison and environmental risk perception, the oil injection operation can comprehensively consider the corrosion change trend of the bolt and the corrosion risk of the external environment where the bolt is located, the oil injection quantity is adaptively and dynamically regulated and controlled, the accuracy of track bolt maintenance is improved, and the maintenance efficiency is improved. The rail operation and maintenance effect is optimized, and the rail operation and maintenance reliability is improved.

The utility model discloses a portable turnout diversion device which comprises two sleeves and a two-way threaded rod which is arranged between the two sleeves, the two ends of the two-way threaded rod are arranged in the corresponding sleeves in a threaded penetrating mode respectively, and a wrench face matched with a wrench to screw the two-way threaded rod to rotate is arranged in the middle of the two-way threaded rod. Pulling plates are hinged to the ends, away from each other, of the two sleeves, pin holes capable of being matched with pins to be connected with the vulcanization cushion plate are formed in the middle positions of the pulling plates, side plates perpendicular to the two-way threaded rods are arranged in the middle positions of the exteriors of the sleeves, and adjusting screw rods with one ends hinged to the pulling plates movably penetrate through the side plates; the device has the advantages that the distance between the two pulling plates can be flexibly adjusted through the sleeves arranged at the two ends of the two-way threaded rod, so that the track gauges of a guide curve part and a wing rail part of the turnout can be conveniently adjusted, meanwhile, the device is light in weight, easy to operate and capable of being used by one person, and the overall working efficiency is improved.

The application discloses a railway track maintenance device and relates to the technical field of railway maintenance.The device comprises a vehicle frame, a cleaning assembly arranged below the vehicle frame, a cleaning disc, a cleaning head and a solution nozzle arranged on the cleaning disc, and the solution nozzle is arranged beside the cleaning head.The cleaning head and the solution nozzle are arranged in pairs.The vehicle frame is used as an overall support structure, the cleaning assembly is arranged at the lower part of the vehicle frame, and the cleaning head and the solution nozzle are arranged on the cleaning disc.In operation, the cleaning head directly contacts the track surface to mechanically remove rust and sundries, and the solution nozzle simultaneously sprays cleaning liquid to soften and dissolve stubborn dirt, thereby realizing integrated maintenance.The design changes the traditional mode of separate cleaning and spraying, can strengthen the rust and dirt removal effect, reduce the loss of cleaning liquid, reduce the labor operation pressure, and effectively improves the track maintenance quality and driving safety guarantee capacity.

The invention provides a ballastless track roadbed treatment method, device and equipment and a storage medium, and is applied to the technical field of high-speed railway roadbed disease treatment. A ballastless track roadbed treatment method comprises the steps that S1, waveform data of a track inspection vehicle and / or a scanning result of a ground penetrating radar are / is obtained, and the starting mileage and the ending mileage of roadbed diseases are delimited; s2, physical characteristic parameters of roadbed filler and the thickness of the surface layer of a roadbed are obtained; s3, measuring rheological characteristic parameters of the polyurethane slurry at the environment temperature; s4, grouting process parameter optimization calculation is conducted, and optimized process parameters are obtained; s5, a grouting scheme is formulated according to the optimized process parameters, and ballastless track roadbed disease treatment operation is implemented; and S6, testing and evaluating the quality of the improvement operation according to the roadbed dynamic stiffness of the ballastless track under the cyclic load effect of 5Hz and above. According to the method, the adaptability of a polyurethane grouting technology to complex working conditions is remarkably improved, and reliable technical support is provided for long-term performance maintenance of the ballastless track roadbed.

The utility model discloses a vehicle-mounted rail bolt oiling operation device and a rail engineering vehicle, the oiling operation device is mounted on the rail engineering vehicle, and the oiling operation device comprises a detection execution mechanism, a grease tank, a pressurizing device and a control system. The detection execution mechanism is arranged close to wheels of the rail engineering vehicle and comprises a sleeper bolt detection sensor and a spray gun. Grease in the grease box is communicated with an oil path of the spray gun through the pressurizing device, and the control system obtains signals of the sleeper bolt detection sensor and controls connection and disconnection of an air path of the spray gun through the electromagnetic valve. The rail bolt oiling device can solve the technical problems that an existing oiling operation device cannot conduct all-dimensional effective spraying on rail bolts, and the oiling operation quality is not high.

The invention belongs to the technical field of railway construction, and particularly relates to a protective fence positioning support device which comprises a transfer frame for hanging a protective fence stand column from one side of a pre-buried pit and hanging the protective fence stand column in the pre-buried pit and a fixing frame capable of being inserted into the transfer frame from the rear side to replace the transfer frame to support the stand column. The transfer frame is provided with horizontal bubbles used for leveling, the four corners of the bottom of the transfer frame are each provided with a quick-change base plate capable of adjusting the height, each quick-change base plate is provided with a locking assembly, and when the fixing frame supports the stand columns, the locking assemblies are switched from the state of locking the transfer frame to the state of locking the fixing frame. Through cooperation of the movable frame and the fixed frame, guard railing stand column positioning operation can be efficiently and conveniently carried out, and the problem that in the prior art, stand column suspension positioning is inconvenient is solved.

The objective is to provide a method for reinforcing a concrete floor slab on which a ballast track is placed, by enabling the reinforcement of the concrete floor slab without removing the ballast track, particularly the ballast itself. [Solution] A method for reinforcing a concrete floor slab 2 on which a ballast track 1 is laid, comprising: a pre-watering step of sprinkling water on the ballast track 1 to wet the silt surface of the silt layer 3 and / or the ballast surface of the ballast layer 4; and an impregnating repair material sprinkling step of sprinkling an impregnating repair material on the ballast track 1 and supplying it to the surface of the concrete floor slab 2.

The present invention proposes an innovative railway system based on modularity, mobility, adaptability, and an innovative ground anchoring system. Thanks to its integrated wheel system, synthetic rubber platform, anchoring stakes, and ease of assembly, this system allows for the rapid and efficient construction of custom-designed roller coasters, suitable for all types of terrain. The system's flexibility minimizes sections requiring permanent construction, while offering a unique attraction to promote the use of roller coasters as a new form of public and tourist transportation.

The present invention relates to a method for the rehabilitation and / or stabilization of a track bed, wherein railway rails are attached to sleepers and the sleepers are arranged in or on the track bed and stones, ballast or the like are located in the track bed, wherein the rehabilitation and / or stabilization takes place in the track bed itself without detaching the sleepers or rails and / or without removing the sleepers from the track bed, wherein the sleepers have a central section and two end sections, and the central section is located between the two end sections, wherein in the area of ​​the central section and / or one or both end sections of the sleeper a material, preferably an injection resin, is injected laterally into the track bed at the sleeper using a packer, filling nozzle or the like.wherein the material solidifies or hardens after application and wherein, during injection, the material enters the track bed below the sleeper and wets the track bed material, namely stones, ballast or the like, and fills gaps and / or cavities in the track bed, and after solidification of the material, preferably injection resin, the area of ​​the track bed that is wetted by the injection material, or whose gaps and / or cavities are filled, forms a compact body on which the sleeper rests.

The utility model provides a grouting stopping structure suitable for grouting reinforcement of a ballast bed in a subway tunnel section. The grouting stopping structure comprises a grouting hole, a grouting sleeve, a first grouting stopping plug, a second grouting stopping plug, a spring and a pressure relief pipeline. The grouting sleeve extends into the grouting hole and is used for grouting the grouting hole; the first stop-grouting plug is arranged at the front end of the grouting sleeve and used for sealing the interior of the grouting hole; the second stop-grouting plug is arranged at an opening of the grouting hole and used for sealing the opening of the grouting hole; the spring is mounted between the first stop-grouting plug and the second stop-grouting plug and is used for applying pressure to the second stop-grouting plug; the second stop-grouting plug is an air cavity type plug body or a liquid cavity type plug body, and the pressure relief pipeline is communicated with an inner cavity of the second stop-grouting plug and used for relieving sealing pressure of the second stop-grouting plug. The grout stopping structure has the advantages of being higher in grout stopping capacity and better in grouting stability.

An apparatus for applying a single-component or multi-component adhesive to a ballast bed of a stretch of rails in a rail path, includes a container for the adhesive and elements for conveying the adhesive for application are mounted on a supply vehicle which can be driven on, or adjacent to, the rail path. The adhesive is guided from the supply vehicle with a hose having a one nozzle. The apparatus further includes a trolley that can be temporarily coupled and secured to a rail, and can be moved in a rail-bound manner at a desired and uniform speed independently of the supply vehicle. The trolley supports a boom on which the nozzle is mounted, so that a defined depth of penetration of the adhesive can be maintained by the apparatus at a uniform running speed of the trolley and defined flow rates of the adhesive depending upon the characteristics of the ballast bed and spray pattern.

The utility model relates to the technical field of track construction, and discloses a movable heat preservation shed for ballastless track winter construction, the movable heat preservation shed comprises a shed frame, a heat preservation interlayer and a moving mechanism, the heat preservation shed frame comprises a tripod at the top and side frames fixedly arranged on the two sides of the tripod, the movable devices are fixed to the side frames, the movable devices move on rails installed on a construction site, the overall structural strength of the heat preservation shed is greatly improved through the reinforced shed frame structure, the wind resistance of the heat preservation shed can be effectively improved, the service life of the heat preservation shed can be effectively prolonged, the clamping mechanisms are arranged at the bottom of the heat preservation shed, and therefore the heat preservation shed is convenient to use. The whole thermal insulation shed can be fixed on the track through the clamping mechanism after the thermal insulation shed stops moving, so that the stability of the thermal insulation shed is ensured.

The invention is a system and method for repairing, improving, and stabilizing subgrade and subsoil / natural ground layers of a rail bed generally consisting of softer soils. One embodiment includes a method of installing subsurface inclusions and ballast fills comprising injected slurry mixtures of stabilizing material such as cement grout mixed with in situ soil. Another embodiment includes a system of installed ground inclusions and ballast fills. Another embodiment includes an integrated system of equipment for emplacing the system of inclusions and ballast fills.

The utility model discloses a high -speed railway base post -cast strip breaking device relates to high -speed railway construction technical field, including the main breaking mechanism of setting in the adjacent two rails between the up track and down track, still include the auxiliary breaking mechanism of setting on high -speed railway protection wall, the auxiliary breaking mechanism includes two U type frames of spacing clamping on the protection wall along the transverse, is equipped with the transverse shift mechanism between two U type frames, and the mobile end of transverse shift mechanism is fixedly installed with elevating system, the mobile end of elevating system is fixedly installed with installation box, and the fixed block is fixedly installed with drive mechanism and in installation box, and the cavity is rotated and is sleeved with high pressure spray pipe in the fixed block along the longitudinal direction, the water inlet hole that communicates with the cavity is seted up to one side of fixed block. This high -speed railway base post -cast strip breaking device, through main breaking mechanism and auxiliary breaking mechanism respectively from post -cast strip both ends operation, avoided the efficiency attenuation when single mechanism distal end operation, improved the overall crushing efficiency greatly.

The application discloses a command device for railway construction, which comprises a bearing seat, a limiting groove wheel rotationally connected to the bottom of the bearing seat, a vertical rod fixedly connected to the upper side of the bearing seat, a display plate arranged at the upper end of the vertical rod, and two groups of derailment protection assemblies symmetrically arranged at the two sides of the bearing seat. Each group of the derailment protection assemblies comprises a round rod fixedly connected to the bottom of the bearing seat, two hinged plates symmetrically hingedly connected to the round rod, and a first torsional spring arranged in a stepped hinge hole of the hinged plate. The hinged plate is hingedly connected with a support rod, a second torsional spring is arranged on the rotating shaft of the support rod, and a limiting wheel is arranged at the lower end of the support rod. The two support rods are expanded to the two sides, so that the distance between the two landing support points is enlarged, the support is more stable, the application is prevented from directly falling down, and the safety is improved. The foolproof design can effectively avoid the damage of the equipment caused by the misoperation or distracted operation of the commander.