阅读说明：本技术 一种适用于近岸软基滩涂转运作业的快速搭建栈桥装置 (Rapid trestle building device suitable for near-shore soft-foundation mudflat transfer operation ) 是由 李志富 陈凡 石玉云 张代雨 于 2021-09-09 设计创作，主要内容包括：本发明公开了一种适用于近岸软基滩涂转运作业的快速搭建栈桥装置,该装置包括浮桥主体、推进机构、升降机构、连接机构和挡浪板,推进机构安装在桥式装置尾端,位于浮桥主体下方,水从主体底部吸入,以高速从尾端排出从而驱动桥式装置的向前推进；浮桥主体内部升降机构下端与固定板配合,能够多角度调节以适应滩涂软基地形,保证物资装备等平稳转运作业；连接机构设置在浮桥主体内部靠近尾部处,可与另一桥式装置首端的辅助连接接头配合实现多个装置首尾端的稳定连接；浮桥主体首端连接有挡浪板,减小水中自主航行阻力,增加行进速度,本发明通过下放固定板调节浮桥主体姿态,提供良好的转运作业环境,保障人员物资装备等高效平稳转运作业。(The invention discloses a rapid trestle building device suitable for near-shore soft-foundation mudflat transfer operation, which comprises a floating bridge main body, a propelling mechanism, a lifting mechanism, a connecting mechanism and a wave blocking plate, wherein the propelling mechanism is arranged at the tail end of the bridge device and is positioned below the floating bridge main body, water is sucked from the bottom of the main body and is discharged from the tail end at a high speed so as to drive the bridge device to be propelled forwards; the lower end of the lifting mechanism in the pontoon main body is matched with the fixed plate, and can be adjusted at multiple angles to adapt to the soft foundation terrain of the mudflat, so that stable transfer operation of material equipment and the like is ensured; the connecting mechanism is arranged in the floating bridge main body and close to the tail part, and can be matched with an auxiliary connecting joint at the head end of another bridge type device to realize stable connection of the head end and the tail end of a plurality of devices; the front end of the pontoon main body is connected with the wave blocking plate, so that the autonomous navigation resistance in water is reduced, and the advancing speed is increased.)

1. The utility model provides a build landing stage device fast suitable for operation is transported to soft base mud flat of nearly bank which characterized in that: comprises a floating bridge main body (1), a propelling mechanism (2), a lifting mechanism (3), a connecting mechanism (4) and a wave blocking plate (5), the propulsion mechanism (2) is arranged at the tail end of the device and is positioned below the pontoon main body (1), two pairs of lifting mechanisms (3) are symmetrically arranged at the left side and the right side in the floating bridge main body (1), the upper end of the lifting mechanism (3) is connected with the posture adjusting mechanism (31), the lower end is matched with the double-layer fixing plate (33), the internal portion of pontoon bridge main part (1) is equipped with near afterbody department coupling mechanism (4), but cable frame (45) retractable hawser on coupling mechanism rotation axis (44) realize the traction between two devices, and main part head and the tail outer wall corresponds the position and is equipped with and connects fixed establishment (46), and pontoon bridge main part head end is connected with breakwater (5) changes inclination with automatic telescopic link (51) cooperation.

2. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: the propulsion mechanism (2) comprises two identical water-jet propellers (22), each water-jet propeller (22) comprises a guide vane (221), an impeller (222), a driving shaft (223) and a water inlet flow channel (224), transmission between the two water-jet propellers (22) of the propulsion mechanism (2) is mainly achieved through belt transmission, and a pair of belt wheels (23) with the same size is selected for the belt transmission.

3. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: the shaft (324) of the lifting mechanism (3) is hinged to the posture adjusting mechanism (31) above the lifting mechanism, the moving platform is internally connected with the driving rotating shaft (312) through a driven rotating shaft (313) in a meshed mode through threads, the driven rotating shaft (313) and the driving rotating shaft (312) are four groups, and bearings are mounted at the lower end of the driven rotating shaft and hinged to the supporting plate (311).

4. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: elevating system (3) are the connecting rod structure, including four sets of drive lever (325) and driven lever (326) that length equals, and the inboard all is equipped with the recess, the left and right sides drive lever (325) with be fixed with horizontal pole (327) between the driven lever (326) junction.

5. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: the lower end of the lifting mechanism (3) is connected with a double-layer fixing plate (33), the upper plate and the lower plate of the double-layer fixing plate are connected through a spring (333) and are provided with a pressure sensor, a plurality of conical spines are arranged on the inner side of the upper layer fixing plate (331), and round holes with the same size are arranged at the corresponding positions of the lower layer fixing plate (332).

6. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: the connecting mechanism (4) is positioned in the floating bridge main body (1), a rotating shaft (44) fixed through a shaft shoulder is arranged in the floating bridge main body, a driving gear (42) on an output shaft of the motor is meshed with a driven gear (43) at one end of the rotating shaft for transmission, the gears are fixed on the rotating shaft (44) through key connection, and a pair of cable frames (45) are arranged on the rotating shaft.

7. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: and a tail end connecting body (462) of the connecting mechanism (4) is hinged with a spherical hollow connecting part (13) at the tail part of the floating bridge main body (1) by adopting a spherical moving part, and a strong spring is arranged below the tail joint pressing plate.

8. The device for quickly building the trestle suitable for the near-shore soft-foundation beach transfer operation according to claim 1, is characterized in that: the wave blocking plate (5) is arranged at the head end of the pontoon main body (1), and the guide groove in the side end of the wave blocking plate (5) is matched with the sliding guide rail at the foremost end of the automatic telescopic rod (51).

Technical Field

The invention belongs to the technical field of design and manufacture of ships and ocean engineering equipment, and particularly relates to a rapid trestle building device suitable for near-shore soft-foundation mudflat transfer operation.

Background

The tidal flat generally refers to a tidal immersion zone between a high tide level and a low tide level of a coastal large tide, and the natural geographic environment of the tidal flat is influenced by both land and marine environments under the action of tides and the like. The soft foundation beach is a typical characteristic of the near shore, the foundation bearing capacity is low, and deformation, sinking and the like are easy to occur under the action of external load; in some emergency situations, such as large-scale island rescue and relief work, personnel and material support equipment needs to be quickly conveyed to the island across the beach terrain within a limited time; the device is limited by the shallow water depth characteristic of the near-shore mudflat, the traditional large transport ship is difficult to directly lean against the near-shore, an auxiliary transport trestle is usually required to be erected to connect the near-shore and the large transport ship, and a personnel material guarantee equipment transport channel is formed.

Compared with a permanent bridge, the motorized trestle has the advantages of short construction period, good economy, no permanent occupation of bridge site sites and the like, so the motorized trestle occupies an extremely important position in military logistics support and emergency rescue and relief work, and particularly for coastal shoal water areas, the motorized trestle is one of the most effective devices for guaranteeing the transportation of personnel and material equipment to the shore. The maneuvering trestle with excellent performance should have strong support capability, quick maneuvering capability, wide sea condition adaptability, and good maneuverability, safety and reliability.

In recent years, with the rapid development of high and new technologies, the weight and the maneuverability of various material support equipment are greatly improved, and higher requirements are provided for the load carrying capacity of a mobile trestle, the adaptability to the traffic capacity of novel equipment and the like. To accommodate this trend, various new materials, processes and structural forms are used in succession on mobile trestles, for example: chinese patent CN108894094A discloses an offshore trestle capable of compensating disturbance of marine environment, which can isolate the influence of ship motion on the trestle bridge body to a certain extent, however, the present mobile trestle equipment can not effectively adapt to the operation of near-shore soft-foundation beach transfer, and a novel mobile trestle equipment is urgently needed to be developed to extend the adaptability and the safety and reliability of the personnel material guarantee equipment transfer operation.

Disclosure of Invention

The purpose of the invention is as follows: aiming at the problem that the existing trestle equipment is difficult to ensure the safe and stable transportation of personnel and materials in a complex beach environment, the invention aims to provide a quick trestle building device suitable for the offshore soft foundation beach transportation operation.

The technical scheme is as follows: in the embodiment of the invention, the invention provides a rapid trestle building device suitable for near-shore soft-foundation mudflat transfer operation. The propelling mechanism is arranged at the tail end of the device and is positioned below the floating bridge main body, and the spraying part can be completely immersed in water when the device is launched to work; two pairs of lifting mechanisms are symmetrically arranged on the left side and the right side in the floating bridge main body, the upper ends of the lifting mechanisms are connected with the posture adjusting mechanism, and the lower ends of the lifting mechanisms are matched with the double-layer fixed plate, so that the free adjustment of depth and inclination angle can be realized according to the soft foundation topography of the mud flat; the connection mechanism is equipped with near afterbody department inside the pontoon bridge main part, and the pull of two devices is realized to the retractable hawser of the last hawser frame of connection mechanism rotation axis, and main part head and the tail outer wall corresponds position department and is equipped with and connects fixed establishment, can realize the stable connection between a plurality of devices with the cooperation of another bridge type device head and the tail, and pontoon bridge main part head end is connected with the manger board, changes inclination with the cooperation of automatic telescopic link, reduces the aquatic and independently navigates by water the resistance, increases the speed of marcing.

The invention is further improved in that: the propulsion mechanism mainly adopts two same water-jet propellers and consists of a guide vane, an impeller, a driving shaft and a water inlet flow channel, compared with a common propeller, the propulsion mechanism has excellent high-speed maneuverability in the aspects of acceleration and braking performance, has shallow draft and shallow water effect, is simple in transmission mechanism, small in accessory resistance and good in protection performance, the transmission between the two water-jet propellers of the propulsion mechanism is mainly realized through belt transmission, and a pair of belt wheels with the same size is selected for the belt transmission so as to ensure that the water-jet propulsion work is stable in operation.

The invention is further improved in that: the fixed shaft of the lifting mechanism is hinged to the posture adjusting mechanism above the fixed shaft, the moving platform is internally connected with the driving rotating shaft through threads in a meshed mode through the driven rotating shaft, the driven rotating shaft and the driving rotating shaft are four groups, ball bearings are arranged at the lower end of the driven rotating shaft and hinged to the supporting plate, and the supporting plate is deep and adjusted in inclination angle through rotation of the four groups of the driven rotating shafts.

The invention is further improved in that: the lifting mechanism is of a connecting rod structure, four groups of driving rods and driven rods with the same length are selected, and grooves are formed in the inner sides of the driving rods and the driven rods; the left and right sides is fixed with the horizontal pole between the initiative pole and the driven lever junction, guarantees the stationarity of mechanism, elevating system mainly carries out hydraulic lifting by the pneumatic cylinder drive, and the during operation starts the hydraulic oil gear pump and constantly pressurizes along the pipeline pump with oil tank hydraulic oil toward the pneumatic cylinder, and the plunger in the pneumatic cylinder rises, and the elevating speed is stable, and the braking is safe and reliable.

The invention is further improved in that: the lower end of the lifting mechanism is connected with a double-layer fixed plate, the upper plate and the lower plate of the double-layer fixed plate are connected through a spring, and a pressure sensor is arranged, namely the mechanism can stop working when certain pressure is applied; the inner side of the upper layer fixing plate is provided with a plurality of conical spikes, and round holes with the same size are arranged at corresponding positions of the lower layer fixing plate and can penetrate through the upper layer fixing plate to play a role in fixing when the device works.

The invention is further improved in that: the connecting mechanism is located inside the pontoon main body and is provided with a rotating shaft fixed through a shaft shoulder, a driving gear on a motor output shaft is meshed with a driven gear at one end of the rotating shaft for transmission, the gear is fixed on the shaft through key connection, a pair of cable frames are arranged on the rotating shaft, and cables are collected and released along with the rotation of the shaft.

The invention is further improved in that: the tail end connector of the connecting mechanism is hinged with a spherical hollow connecting part at the tail part of the floating bridge main body by adopting a spherical moving part, and a strong spring is arranged below the tail joint pressing plate, so that the pressing plate can be rapidly restored to the original state under the condition of no external pressure.

The invention is further improved in that: the wave blocking plate is arranged at the head end of the pontoon main body, the lower end of the wave blocking plate is hinged, and the guide groove in the side end is matched with the sliding guide rail at the foremost end of the automatic telescopic rod, so that multi-angle free inclination is realized; the wave blocking plate is made of stainless steel, and the end face of the wave blocking plate is provided with an antirust coating.

Has the advantages that:

compared with the existing trestle bridge equipment, the invention can realize quick construction and safe and reliable operation under soft foundation beach terrain with low foundation bearing capacity and shallow water depth, and can adjust the posture of the main body of the floating bridge by reasonably lowering the fixing plate, thereby providing guarantee for safe transfer operation of personnel material equipment and the like.

Drawings

FIG. 1 is a schematic view of the present invention illustrating the connection of a plurality of bridge devices;

FIG. 2 is a schematic view of the bridge assembly of the present invention being transported prior to launch;

FIG. 3 is a schematic view of the bridge apparatus of the present invention;

FIG. 4 is a schematic structural diagram of the main body of the pontoon according to the invention;

FIG. 5 is an exploded view of the propulsion mechanism of the present invention;

FIG. 6 is a schematic view of a water jet propulsion system according to the present invention;

FIG. 7 is a schematic view of the operation of the lifting mechanism of the present invention;

FIG. 8 is an exploded view of a posture adjustment mechanism of the lift mechanism of the present invention;

FIG. 9 is a schematic view of a lifting rod of the lifting mechanism according to the present invention;

FIG. 10 is an exploded view of a fixing plate of the lifting mechanism according to the present invention;

FIG. 11 is an exploded view of the coupling mechanism of the present invention;

FIG. 12 is a schematic view of a fastening mechanism of the coupling mechanism of the present invention;

fig. 13 is a schematic structural view of the breakwater according to the present invention;

FIG. 14 is a flow chart of the present invention.

Wherein: 1-floating bridge body, 2-propulsion mechanism, 3-lifting mechanism, 4-connecting mechanism, 5-wave retaining plate, 11-cable buckle, 12-water inlet, 13-spherical connecting part, 21-storage battery, 22-water jet propeller, 221-guide vane, 222-impeller, 223-driving shaft, 224-water inlet runner, 23-belt wheel, 31-attitude adjusting mechanism, 311-supporting plate, 312-driving rotating shaft, 313-driven rotating shaft, 314-base, 32-lifting rod, 321-hydraulic oil pump, 322-pipeline pump, 323-hydraulic cylinder, 324-shaft, 325-driving rod, 326-driven rod, 327-transverse rod, 328-connecting rod, 33-fixing plate, 331-upper fixing plate, and, 332-lower fixing plate, 333-spring, 41-motor, 42-driving gear, 43-driven gear, 44-rotating shaft, 45-cable rack, 46-fixing mechanism, 461-head end connecting part, 462-tail end connecting part, 5-wave blocking plate and 51-automatic telescopic rod.

Detailed description of the preferred embodiments

In order to make the technical solution of the present invention better understood, the technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings of the present invention.

The invention provides a rapid trestle building device suitable for near-shore soft-foundation mudflat transfer operation, which has the structure shown in figure 1: the device comprises a floating bridge main body 1, a propelling mechanism 2, a lifting mechanism 3, a connecting mechanism 4 and a wave blocking plate 5, wherein the propelling mechanism 2 is arranged at the tail end of the device and is positioned below the floating bridge main body 1, and when the device is launched to work, a spraying part can be completely immersed in water; two pairs of lifting mechanisms 3 are symmetrically arranged on the left side and the right side inside the floating bridge main body 1, the upper ends of the lifting mechanisms 3 are connected with a posture adjusting mechanism 31, and the lower ends of the lifting mechanisms 3 are matched with a double-layer fixing plate 33, so that the free adjustment of deep depth and inclination angle can be realized according to the soft foundation topography of a mud flat; the connection mechanism 4 is equipped with near afterbody department inside the pontoon bridge main part 1, and the pull between two devices is realized to the retractable hawser of the cable frame 45 on the connection mechanism rotation axis 44, and the corresponding rigidity of main part head and the tail outer wall has connection fixed establishment 46, can realize the stable connection between a plurality of devices with the cooperation of another bridge type device head and the tail, and the pontoon bridge main part head end is connected with breakwater 5 changes inclination with automatic telescopic link (51) cooperation, reduces the aquatic and independently navigates by water the resistance, increases the speed of marcing.

As shown in fig. 4, the structure of the pontoon main body 1 comprises a cable buckle 11, a water inlet 12 and a spherical connecting part 13, wherein the cable buckle 11 is arranged at two sides of the outer wall of the head end of the main body 1 and is matched with a cable of the connecting mechanism 4 for mutual traction between the two devices; the water inlet 12 is positioned right above the water jet propeller 22, so that water flow can conveniently enter the water jet propeller from the lower part of the main body; the tail of the pontoon main body 1 is provided with a spherical connecting part 13 which is of a hollow structure and is matched with a tail end connecting body 462 of the connecting mechanism 4, so that relative movement between devices is realized, and the phenomenon that the structure damaged between pontoon modules applies concentrated force load is avoided.

As shown in fig. 5 and 6, the propulsion mechanism 2 includes a battery 21 and a water jet 22. The storage battery 21 is arranged in the center of the tail part of the floating bridge main body 1 and is used for driving the whole propelling mechanism 2; the water jet 22 is composed of a guide vane 221, an impeller 222, a drive shaft 223 and a water inlet flow passage 224, and is installed at the tail of the device, and two identical water jet 22 are used as required. The water flow enters the water jet propeller 22 from the water inlet below the main body and then passes through the impeller 222 and the guide vanes 221, the pressure rises, and the pressure energy of the water flow is converted into kinetic energy in the nozzle; the impeller 222 is connected with the driving shaft 223 through a coupler, water flow is sprayed out from the nozzle at a high speed, and the whole device is pushed forward under the action of a reaction force; the transmission between the driving shafts of the two water jet propellers 22 selects a pair of belt wheels 23 with the same size to ensure the stable operation of the water jet propulsion.

As shown in fig. 7, 8, 9 and 10, the lifting mechanism 3 includes three major parts, namely a posture adjusting mechanism 31, a lifting rod 32 and a fixing plate 33. The posture adjusting mechanism 31 mainly comprises a supporting plate 311, a driving rotating shaft 312, a driven rotating shaft 313 and a base 314, wherein a motor system is fixed on the base 314, the driven rotating shaft 313 is meshed with the driving rotating shaft 312 through threads, ball bearings are arranged at the lower end of the driven rotating shaft 313 and hinged with the supporting plate 311, the driven rotating shaft 313 and the driving rotating shaft 312 are four groups, the motor system operates to drive the driving rotating shaft 312 to rotate and simultaneously rotate the driven rotating shaft 313, the four groups of driven rotating shafts 313 rotate to adjust the deep sinking and the inclination angle of the supporting plate, and the movement of three degrees of freedom of pitching, rolling and heaving of the mechanism is realized. The lifting rod 32 is mainly a link mechanism, and comprises a hydraulic oil gear pump 321, a pipeline pump 322, a hydraulic cylinder 323, a shaft 324, a driving rod 325, a driven rod 326, a cross rod 327 and a connecting rod 328; the shaft 324 is connected with the upper supporting plate 311 through a connecting rod 328, one end of the driving rod 325 is sleeved on the shaft 324, the other end of the driving rod is connected with the driven rod 326, four groups of driving rods 324 and driven rods 326 with the same length are selected together, and grooves are formed in the inner sides of the driving rods 324 and the driven rods 326 to facilitate convergence; a cross rod 327 is fixed between the joints of the driving rod and the driven rod on the left side and the right side, so that the mechanism is more stable in operation to a certain extent; the hydraulic oil gear pump 321 is arranged on the bottom wall of the main body, the pipeline is communicated with the hydraulic cylinder, when the hydraulic oil gear pump 321 is started to continuously pressurize hydraulic oil in an oil tank to the hydraulic cylinder 323 along the pipeline pump 322 during working, a plunger in the hydraulic cylinder 323 rises, after the hydraulic oil pump stops, the one-way valve prevents oil return, and the plunger stands on the way of rising; after the device works, the electromagnetic valve is only needed to be switched on to open the liquid return circuit, the oil returns to the oil tank, the hydraulic cylinder 323 reduces the pressure, the plunger piston descends, the lifting speed is stable, and the braking is safe and reliable. The fixing plate 33 is divided into an upper fixing plate 331 and a lower fixing plate 332, the upper and lower plates of the double fixing plate are connected by a spring 333, and a pressure sensor is installed, namely, when the lifting mechanism runs, the lifting mechanism can immediately react to the hydraulic oil gear pump under a certain pressure to rapidly stop working; the upper side of the upper fixing plate 331 is provided with a hinged joint hinged with the lower end of the driven rod 326, the right hinged joint can slide in a certain range so as to obtain a larger telescopic stroke, a plurality of sharp conical spines are arranged on the inner side, round holes with the same number and size are arranged at the corresponding positions of the lower fixing plate 332, the round holes can penetrate through the round holes to be deeply tied to the soft foundation terrain of the mudflat to play a fixing role when the device works, the posture of the main body of the floating bridge is reasonably adjusted, and a safe and stable transfer environment is provided; the fixing plate 33 can be added with a solid object with a proper size between the upper plate and the lower plate in the transportation process of the device without water, thereby being convenient for hauling and having more safety.

As shown in fig. 11 and 12, the connecting mechanism 4 includes a motor 41, a driving gear 42, a driven gear 43, a rotating shaft 44, a cable frame 45 and a fixing mechanism 46, wherein the motor 41 is connected inside the pontoon main body 1 by rivets, the driving gear 42 on the output shaft thereof is meshed with the driven gear 43 on the rotating shaft, the gears are all fixed on the shaft by key connection, the rotating shaft 44 is processed into a stepped shaft and is arranged inside the pontoon main body 1 near the tail end in a shoulder fixing manner; a pair of cable brackets 45 which are symmetrical left and right are arranged on the rotating shaft 44, and the cables are wound and released along with the rotation of the shaft; the fixing mechanism 46 mainly comprises a head end connecting part 461 and a tail end connecting part 462, and is arranged at the head end and the tail end outside the bridge type device, and the fixing mechanisms 46 at the head end and the tail end are matched for use; the interior of the head end connecting part 461 is designed into a sawtooth shape with the same size and shape as the tail end connecting part 462, and a pressing opening is arranged above the head end connecting part, so that the devices can be separated conveniently after the work is finished; the spring is arranged under the pressure plate of the tail end connector 462, when the two devices are drawn by the cable to be close to each other, the tail end connector 462 provided with the spring pressure plate can be pushed into the head end connecting part 461, and the spring is immediately restored to the original state after the pressure disappears, so that the two devices are perfectly attached, the installation is rapid, the stability is good, and the stable connection between the devices can be realized.

As shown in fig. 13, the structure of the breakwater 5 is shown, the breakwater 5 is arranged at the head end of the main body of the pontoon, and is made of stainless steel, and the end surface is provided with an antirust coating; the lower end of the wave blocking plate 5 is hinged, the left side and the right side are provided with guide grooves which are matched with the sliding guide rail at the most front end of the automatic telescopic rod 51, the automatic telescopic rod 51 is fixed in the left side wall and the right side wall of the floating bridge main body, and the inclination angle of the wave blocking plate 5 can be freely controlled as required when the device moves forward, so that the autonomous navigation resistance in water is reduced, the fluctuation and the impact of sea waves are reduced, the traveling speed is increased, and the traveling stability of the device is improved.

As shown in fig. 14, the working flow chart of the device is that when an emergency occurs in an island, a plurality of trestle devices are delivered with water, at this time, the propulsion mechanism 2 starts to work, and the water jet propeller 22 immersed in the water pushes the whole device to move forwards; in the driving process, the free telescopic rod 51 extends, and the inclination angle of the wave board 5 is reasonably adjusted, so that the navigation resistance is reduced, and the traveling speed is increased. When the device reaches an island near-shore mudflat, the pushing mechanism 2 stops working, the wave blocking plate 5 is folded, the butt joint of the head end and the tail end of the device is started, the cable rope at the tail end of the trestle device A is connected with the cable rope buckle 11 at the head end of the device B, the motor 41 runs to drive the driving gear 42 arranged on the output shaft of the motor to rotate, the rotating shaft 44 and the cable rope frame 45 fixed on the shaft are driven to rotate through gear meshing, and therefore the device A contracts to pull the device B, and when the two devices slowly approach to a certain distance, the head end fixing mechanism 46 is hinged to complete the butt joint.

Subsequently, elevating system 3 works, transfers fixed plate 33, realizes deep and freely adjusting with inclination jointly through gesture adjustment mechanism 31 and lifter 32 in order to adapt to the soft basic topography of mud flat, and finally, upper and lower bilayer pressure sensor stops elevating system 3's operation when receiving certain pressure between fixed plate 33, and the inboard conical spine of upper fixed plate 331 pierces through and goes out and prick the topography deeply, improves good stable transportation operational environment.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Also in the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the equipment or element so referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the present invention. In the drawings of the present invention, the filling pattern is only for distinguishing the layers, and is not limited to any other way.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.