A large cylindrical component carrier vehicle

Abstract

The present invention provides a large cylindrical member carrier, which includes a loading platform frame, a high-position driven wheel assembly (13), a low-position driven wheel assembly (14), and a driving wheel assembly (15). It is characterized in that the loading platform frame includes a frame and a mounting seat (12). The low-position driven wheel assembly (14) includes a mounting hoop seat. There are multiple low-position driven wheel assemblies (14), and they are symmetrically mounted in pairs on two longitudinal load-bearing round tubes (6) through their respective mounting hoop seats. There are multiple high-position driven wheel assemblies (13), and they are symmetrically mounted in pairs on the frame of the loading platform through the mounting seat (12). There are multiple driving wheel assemblies (15), and they are symmetrically mounted in pairs on the frame of the loading platform through the mounting seat (12). The large cylindrical member carrier of the present invention has a frame body with high strength and small deformation, can achieve assembly in narrow sites, reduces the supporting facilities and engineering quantity for realizing the displacement of large cylindrical members, and greatly improves the displacement efficiency.

Description

Technical Field

[0001] The present invention belongs to the technical field of moving and transporting large cylindrical components, and particularly relates to a carrier vehicle for large cylindrical components. Background Art

[0002] With the rapid development of industrialization in China, large and heavy cylindrical components need to be transported in many fields, such as shield machines for subway tunnels, rocket bodies for space launches, and reaction towers for chemical production, etc. These large cylindrical components are generally made of metal, with large diameters and heavy weights, and there are problems of difficult displacement and installation during on-site construction. In the prior art, for example, the flatbed trucks widely used in the shipbuilding industry for transporting ship sections are mostly general-purpose equipment, using rubber tires, with high prices, weak load-bearing capacities, and are suitable for long-distance transportation. When transporting cylindrical components, a special gantry needs to be made and installed on the flatbed truck, with poor applicability. Moreover, many construction sites for large cylindrical components are located underground or in remote areas, making it difficult to transport standardized equipment such as flatbed trucks to the site. There is currently no carrier vehicle specifically designed for short-distance movement and convenient disassembly and installation during on-site construction of large cylindrical components. Summary of the Invention

[0003] The invention object of the present invention is to provide a carrier vehicle for large cylindrical components, which has a frame vehicle body with high strength and small deformation, can realize assembly in narrow sites, reduces the supporting facilities and engineering quantities for realizing the displacement of large cylindrical components, especially greatly shortens the displacement time of large cylindrical components, and greatly improves the displacement efficiency.

[0004] The specific technical solution of the present invention is a carrier vehicle for large cylindrical components, including a bearing gantry, a high-position driven wheel assembly, a low-position driven wheel assembly, and a driving wheel assembly, characterized in that

[0005] The bearing gantry includes a frame and mounting seats. The frame includes keels, two longitudinal beams, multiple cross beams, two longitudinal load-bearing circular tubes, and two longitudinal support plates. The keel is located on the longitudinal symmetry center line of the bearing gantry. The upper edge surface of the cross beam has a radian matching the outer surface of the cylindrical body of the cylindrical component. The two longitudinal beams, two longitudinal load-bearing circular tubes, and two longitudinal support plates are arranged symmetrically on both sides of the keel in sequence from the inside to the outside. The keel, two longitudinal beams, two longitudinal load-bearing circular tubes, and two longitudinal support plates are perpendicularly installed with multiple cross beams to form the structure of the frame. The longitudinal support plate is a T-shaped steel, and the upper surface of the flange of the T-shaped steel is a rectangular strip-shaped plane, and this rectangular strip-shaped plane is higher than the space plane formed by the upper edge surfaces of multiple cross beams. When bearing the cylindrical component, this rectangular strip-shaped plane directly contacts the outer surface of the cylindrical body of the cylindrical component. There are multiple mounting seats, and the mounting seats are fixedly installed between the two ends of adjacent cross beams on the same side of the keel for installing the high-position driven wheel assembly or the driving wheel assembly.

[0006] The described low-position driven wheel assembly includes a mounting hoop seat and a short load-bearing composite rod. There are multiple low-position driven wheel assemblies, which are symmetrically installed in pairs on two longitudinal load-bearing round tubes through their respective mounting hoop seats.

[0007] There are multiple high-position driven wheel assemblies, which are symmetrically installed in pairs on the frame of the loading platform through the described mounting seats. The high-position driven wheel assembly has a long load-bearing composite rod, and its length is longer than that of the short load-bearing composite rod of the low-position driven wheel assembly.

[0008] There are multiple driving wheel assemblies, which are symmetrically installed in pairs on the frame of the loading platform through the described mounting seats;

[0009] The large cylindrical member carrier vehicle further includes a fixed seat and a longitudinal hand-held guide wheel. The fixed seat is fixedly installed on the keels at the longitudinal two ends of the frame of the loading platform. One end of the wheel axle of the longitudinal hand-held guide wheel is hinged to the fixed seat. When the loading platform travels longitudinally, the longitudinal hand-held guide wheel is lowered, and the axis of the longitudinal hand-held guide wheel is perpendicular to the ground. The longitudinal hand-held guide wheel rolls in cooperation with the side wall of the longitudinally shifted guide groove opened on the ground;

[0010] The large cylindrical member carrier vehicle further includes a lateral guiding mechanism. The lateral guiding mechanism includes lateral guide wheels. When the loading platform travels laterally, the lateral guide wheels are lowered, and the axes of the lateral guide wheels are perpendicular to the ground. The lateral guide wheels roll in cooperation with the side walls of the laterally shifted guide grooves opened on the ground;

[0011] The large cylindrical member carrier vehicle further includes multiple cushion discs installed below the frame. The cushion disc includes a cushion seat and a disc body. The cushion seat is fixedly installed on the frame, and the disc body is connected to the cushion seat through a screw. Rotating the disc body can adjust the distance between the disc body and the ground. When the load is too large, the disc body touches the ground to protect the high-position driven wheel assembly, the low-position driven wheel assembly and the driving wheel assembly, and prevent damage to the road surface.

[0012] Furthermore, the frame of the loading platform is divided into three parts: a head section, a middle section and a tail section. The cross beams in each of the head section, the middle section and the tail section are divided into two end cross beams and multiple intermediate cross beams. The end cross beams at one end of the head section and the tail section are respectively butted and fixed with bolts to the end cross beams at both ends of the middle section.

[0013] Furthermore, the lateral guiding mechanism further includes a lifting oil cylinder. The free end of the piston rod of the lifting oil cylinder is connected to the lateral guide wheel. The lifting oil cylinder can push the lateral guide wheel against the ground to play a braking role.

[0014] Furthermore, it also includes a stop socket, a stop block, and a main machine unloading oil cylinder. The stop socket is installed on the end crossbeam at the outer end of the entire frame of the first section of the frame. The stop block is inserted into the stop socket to prevent the large cylindrical member from sliding longitudinally on the loading platform. The cylinder block of the main machine unloading oil cylinder is installed on the end crossbeam at the outer end of the entire frame of the last section of the frame, and the piston of the main machine unloading oil cylinder points to the first section, which is used to push the large cylindrical member out of the loading platform.

[0015] The beneficial effects of the present invention are as follows:

[0016] 1) The loading platform of the large cylindrical member carrier vehicle body of the present invention is composed of an independent first section, middle section, and last section, and each section is connected by left and right parts. These three sections can be separated and combined, and the large cylindrical member can slide smoothly on the two longitudinal beams of the entire platform; however, stop blocks are provided at both the front and rear ends to prevent the large cylindrical member from sliding by itself when going up and down slopes;

[0017] 2) Four rows of wheel systems are provided under the platform, with 2 rows on the left and right respectively. Among them, there are 8 groups of driving wheel assemblies equipped with hydraulic travel motors, which are symmetrically arranged on the left and right outer 2 rows, 4 groups are arranged in the middle section, and 2 groups are arranged in each of the first and last sections; there are 56 groups of driven wheel assemblies, and each row has them;

[0018] 3) Two groups of guiding mechanisms are provided at both ends of the middle position in the transverse and longitudinal directions of the platform. The transverse guiding mechanism pushes the guiding wheels into the ground guiding grooves through hydraulic cylinders, and these 2 guiding wheels also serve as friction wheels. By changing the hydraulic pressure, the friction force of the guiding wheels on the ground is enhanced to brake on slopes or quickly brake on flat roads; while the guiding mechanisms at both ends of the middle position in the longitudinal direction are manually hung and act in the longitudinal travel ground guiding grooves; the transverse guiding mechanism is only used when the large cylindrical member is displaced or moves too far and brakes transversely;

[0019] 4) The frame of the loading platform is made of a support plate made of T-shaped steel to carry and balance the large cylindrical member. The T-shaped steel has high bending resistance and anti-deformation ability, and it will not cause the large cylindrical member to directly contact the frame and cause frame deformation. Description of the Drawings

[0020] Figure 1 is a three-dimensional structural schematic diagram of the large cylindrical member carrier vehicle of the present invention;

[0021] Figure 2 is a cross-sectional structural schematic diagram of the large cylindrical member carrier vehicle of the present invention;

[0022] In the figure,

[0023] a is the connection between the first section and the middle section, b is the connection between the middle section and the last section.

[0024] 1 Keel, 2 End crossbeam, 3 Longitudinal beam, 4 Longitudinal support plate, 5 Intermediate crossbeam, 6 Load-bearing round tube, 7 Lighting lamp, 8 Block socket, 9 Fixed seat, 10 Longitudinal hand-held guide wheel, 11 Camera, 12 Mounting seat, 13 High-position driven wheel assembly, 14 Low-position driven wheel assembly, 15 Driving wheel assembly, 16 Lateral guiding mechanism, 17 Jacking mechanism, 18 Pad disc, 19 Driven wheel steering oil cylinder, 20 Driven wheel steering mechanism, 21 Steering push rod, 22 Main engine unloading oil cylinder. Detailed implementation mode

[0025] The following description further elaborates on the specific technical solutions of the present invention with reference to the accompanying drawings of the structure specification.

[0026] As shown in Figure 1 -2, a large cylindrical component carrier of the present invention includes a load-bearing platform frame, a high-position driven wheel assembly 13, a low-position driven wheel assembly 14, and a driving wheel assembly 15.

[0027] The load-bearing platform frame includes a frame and a mounting seat 12. The frame includes a keel 1, two longitudinal beams 3, multiple crossbeams, two longitudinal load-bearing round tubes 6, and two longitudinal support plates 4. The keel 1 is located on the longitudinal symmetry center line of the load-bearing platform frame. The upper edge surface of the crossbeam has a curvature that matches the outer surface of the large cylindrical component. The two longitudinal beams 3, two longitudinal load-bearing round tubes 6, and two longitudinal support plates 4 are arranged symmetrically on both sides of the keel 1 in sequence from the inside out. The keel 1, two longitudinal beams 3, two longitudinal load-bearing round tubes 6, and two longitudinal support plates 4 are perpendicularly installed with multiple crossbeams to form the structure of the frame. The longitudinal support plate 4 is a T-shaped steel. The upper surface of the flange of the T-shaped steel is a rectangular strip-shaped plane. The web of the T-shaped steel is welded to the crossbeam. This rectangular strip-shaped plane is higher than the space plane formed by the upper edge surfaces of multiple crossbeams. When carrying a large cylindrical component, this rectangular strip-shaped plane directly contacts the outer surface of the large cylindrical component. There are multiple mounting seats 12, which are fixedly installed between the two ends of adjacent crossbeams on the same side of the keel 1 for installing the high-position driven wheel assembly 13 or the driving wheel assembly 15.

[0028] The frame of the load-bearing platform frame is made in three parts: the head section, the middle section, and the tail section, and can be assembled into the frame of the load-bearing platform frame after entering the installation site. Each section of the crossbeam in the head section, the middle section, and the tail section is divided into two end crossbeams 2 and multiple intermediate crossbeams 5. The end crossbeams 2 at one end of the head section and the tail section are respectively butted and fixed with bolts to the end crossbeams 2 at both ends of the middle section.

[0029] The low-position driven wheel assembly 14 includes a mounting hoop seat. There are multiple low-position driven wheel assemblies 14, which are symmetrically installed on the two longitudinal load-bearing round tubes 6 through their respective mounting hoop seats.

[0030] The large cylindrical member carrier vehicle of a specific embodiment of the present invention further includes a fixed seat 9, a longitudinal hand-held guide wheel 10, a lateral guiding mechanism 16, a block socket 9, a block, a main machine unloading oil cylinder 22, and a plurality of cushion discs 18 installed under the frame.

[0031] The fixed seat 9 is fixedly installed on the keels 1 at the longitudinal two ends of the frame of the loading platform. One end of the wheel axle of the longitudinal hand-held guide wheel 10 is hinged to the fixed seat 9. When the loading platform travels longitudinally, the longitudinal hand-held guide wheel 10 is lowered, and the axis of the longitudinal hand-held guide wheel 10 is perpendicular to the ground. The longitudinal hand-held guide wheel 10 rolls in cooperation with the side wall of the longitudinally moving guide groove opened on the ground.

[0032] The lateral guiding mechanism includes lateral guide wheels. When the loading platform travels laterally, the lateral guide wheels are lowered, and the axes of the lateral guide wheels are perpendicular to the ground. The lateral guide wheels roll in cooperation with the side walls of the laterally moving guide grooves opened on the ground. The lateral guiding mechanism 16 further includes a lifting oil cylinder. The free end of the piston rod of the lifting oil cylinder is connected to the lateral guide wheel. The lifting oil cylinder can push the lateral guide wheel against the ground to play a braking role.

[0033] The block socket 8 is installed on the end cross beam 2 at the outer end of the entire frame at the head section of the frame. The block is inserted into the block socket 8 to prevent the large cylindrical member from sliding longitudinally on the loading platform. The cylinder block of the main machine unloading oil cylinder 22 is installed on the end cross beam 2 at the outer end of the entire frame at the tail section of the frame. The piston of the main machine unloading oil cylinder 22 points to the head section and is used to push the large cylindrical member out of the loading platform.

[0034] The cushion disc 18 includes a cushion seat and a disc body. The cushion seat is fixedly installed on the frame. The disc body is connected to the cushion seat through a screw. By rotating the disc body, the distance between the disc body and the ground can be adjusted. When the load is too large, the disc body touches the ground to protect the high-position driven wheel assembly 13, the low-position driven wheel assembly 14, and the driving wheel assembly 15 and prevent damage to the road surface.

[0035] Two driving wheel assemblies 15 are provided at each of the first and last sections of the load-bearing gantry, and four driving wheel assemblies 15 are provided in the middle section. Two lateral guiding mechanisms 16 are placed near the middle of the middle section. Two of the four jacking mechanisms 17 are provided in each of the middle and first sections, and they are all arranged at the corresponding positions where the mass distribution of the large cylindrical member is relatively concentrated. Six driven wheel steering mechanisms 20 are respectively arranged on the left and right sides at the lower parts of the three sections. The disc springs in the high-position driven wheel assemblies 13 and the low-position driven wheel assemblies 14 have different lengths, that is, the maximum allowable deformation amounts are different. The stiffness of the disc springs in the first section of the load-bearing gantry is greater than that in the last section. In this way, all the high-position driven wheel assemblies 13 and the low-position driven wheel assemblies 14 are under pressure and the force is relatively uniform. At the same time, the vehicle body is relatively flat after loading, and it will not cause some wheel systems to be overloaded and damage the wheels and the ground, nor will there be phenomena such as the vehicle body tilting forward or backward or tilting left and right or twisting due to extremely uneven weight distribution.

[0036] The specific structure of the said low-position driven wheel assembly 14 can be as follows. It includes a guiding and pressure-bearing cylinder, a disc spring, a spherical plain bearing, a nylon wheel system, a threaded pin and a short load-bearing composite rod. The guiding and pressure-bearing cylinder is fixedly connected to the lower end of the mounting hoop seat. The upper end of the guiding and pressure-bearing cylinder is closed and the lower end is open. A guiding hole is opened on the inner surface of the upper end closing plate of the guiding and pressure-bearing cylinder. The upper end of the short load-bearing composite rod is inserted into the guiding hole of the guiding and pressure-bearing cylinder and there is a gap between the upper end of the guiding hole. The short load-bearing composite rod has an annular stepped surface. The disc spring is sleeved on the short load-bearing composite rod and is located between the inner surface of the upper end closing plate of the guiding and pressure-bearing cylinder and the stepped surface of the short load-bearing composite rod. A through groove is opened in the upper part of the short load-bearing composite rod along the length direction of the rod. The threaded pin passes through the through groove in the upper part of the short load-bearing composite rod and is screwed tightly on the wall of the guiding and pressure-bearing cylinder. The lower end of the short load-bearing composite rod is connected to the nylon wheel system through the said spherical plain bearing. The nylon wheel system can rotate freely around the spherical plain bearing on the ground and can also swing up and down by ±5°, so that the nylon wheel system can adapt to the uneven ground. After the load-bearing gantry is loaded, the guiding and pressure-bearing cylinder is pressed down, the disc spring deforms, the guiding and pressure-bearing cylinder moves downwards, and the load-bearing composite rod transmits the pressure of the disc spring to the nylon wheel system.

[0037] The said nylon wheel system includes a nylon wheel and a nylon wheel mounting bracket connected to the spherical plain bearing. A steering push rod 21 is inserted on the nylon wheel mounting bracket. The driven wheel steering oil cylinder 19 pushes the steering push rod 21 to move through the driven wheel steering mechanism 20, so as to drive the nylon wheel system to rotate around the axis of the short load-bearing composite rod.

[0038] There are multiple high-position driven wheel assemblies 13, which are symmetrically installed in pairs on the frame of the bearing bench through the mounting bases 12. The structure of the high-position driven wheel assembly 13 can be similar to that of the low-position driven wheel assembly 14. The differences are as follows: First, the guiding and pressure-receiving cylinder of the high-position driven wheel assembly 13 is installed on the mounting base through a mounting plate; Second, the high-position driven wheel assembly 13 has a long load-bearing composite rod, whose length is longer than that of the short load-bearing composite rod of the low-position driven wheel assembly 14. The nylon wheel system of the high-position driven wheel assembly 13 can also be rotated and reversed under the action of the driven wheel steering mechanism 20.

[0039] There are multiple driving wheel assemblies 15, which are symmetrically installed in pairs on the frame of the bearing bench through the mounting bases 12. The specific structure of the driving wheel assembly 15 can be as follows: It includes a hydraulic travel motor, an angle encoder, a steering motor, a pressure cylinder, a motor mounting bracket, and a composite steel wheel. The travel motor and its reducer are integrated and jointly connected to the motor mounting bracket with screws. The composite steel wheel coated with polyurethane is also connected to the corresponding reducer of the travel motor with a reduction ratio of 1:37. The lower end joint of the piston of the pressure cylinder is rectangular and inserted into the rectangular groove at the upper part of the motor mounting bracket and fixed with a threaded pin. The cylindrical part with two key grooves at the front end of the steering motor is inserted into the hole with two key grooves at the upper end of the piston, and two flat keys are embedded at the same time. The outer cylinder of the steering motor is fixed on the flat plate at the top of the pressure cylinder with screws. The entire driving wheel assembly 15 is connected to the mounting plate 12 with bolts through the round holes on this flat plate. The angle encoder is connected to the top of the steering motor to reflect its rotation angle. The piston in the pressure cylinder can rotate freely under the action of the steering motor, and the piston can also move up and down under the action of hydraulic pressure. At this time, the key grooves in the inner hole of the upper part of the piston rotate along the two flat keys and the outer cylindrical surface, driving the travel motor, the motor mounting bracket, and the composite steel wheel to move up and down by a maximum distance of 30 mm, enabling the composite steel wheel to adapt to uneven road surfaces and maintaining a constant pressure on the ground, preventing the wheel from hanging and the motor from idling, and making the load of the travel motor relatively stable without affecting the normal operation of the entire hydraulic system.

[0040] The specific implementation of the present invention may further include a jacking mechanism. The corresponding load-bearing platform frame has a jacking mechanism mounting plate. There are four such jacking mechanism mounting plates, which are symmetrically installed in pairs at the ends of the longitudinal sides of the frame. Each jacking mechanism mounting plate is provided with a leg cylinder through hole. The jacking mechanism includes a jacking frame and a leg cylinder. The jacking frame includes a support plate hanging groove plate, a vertical plate, a load-bearing inclined plate, and an oil cylinder piston head plate. The oil cylinder piston head plate is perpendicularly connected to the lower end of the vertical plate. One end of the load-bearing inclined plate is connected to the upper end of the vertical plate. There is an included angle between the load-bearing inclined plate and the oil cylinder piston head plate and it is located above the oil cylinder piston head plate. The support plate hanging groove plate is connected to the lower end of the vertical plate and is located on the other side of the vertical plate where the load-bearing inclined plate and the oil cylinder piston head plate are installed. There is a rib parallel to the vertical plate on the support plate hanging groove plate, and a hanging groove for the load-bearing support plate 4 is formed between the rib and the vertical plate. The free end of the piston rod of the leg cylinder is fixedly installed on the lower surface of the oil cylinder piston head plate. The diameter of the piston rod of the leg cylinder is smaller than the diameter of the leg cylinder through hole on the jacking mechanism mounting plate.

[0041] There are four such jacking mechanisms. The piston rods of the leg cylinders of the four jacking mechanisms are respectively inserted into the leg cylinder through holes on the four jacking mechanism mounting plates. The jacking mechanism mounting plate is located between the oil cylinder piston head plate and the front end cover of the leg cylinder body.

[0042] The upper surfaces of the load-bearing inclined plates of the four jacking mechanism jacking frames all face the large cylindrical component to be carried. When the high-position driven wheel assembly 13, the low-position driven wheel assembly 14, and the driving wheel assembly 15 are reversed, the upper surface of the load-bearing inclined plate directly abuts against the outer surface of the cylinder of the large cylindrical component and jacks up the large cylindrical component. The specific process of the reversal is as follows: The leg cylinder of the jacking mechanism hanging on the jacking mechanism mounting plate is supplied with oil, so that the bottom of the cylinder body of the leg cylinder abuts against the ground. Continuing to supply oil makes the piston rod of the leg cylinder move upward. The load-bearing inclined plate first jacks up the large cylindrical component. Then, the hanging groove of the support plate hanging groove plate hooks the support plate 4, and then the entire load-bearing platform frame is lifted to reverse the high-position driven wheel assembly 13, the low-position driven wheel assembly 14, and the driving wheel assembly 15.

[0043] In the specific implementation of the present invention, the accessories can be connected and disassembled with the load-bearing platform frame. The accessories mainly include a lighting lamp 7, two longitudinal hand-held guide wheels 10, a camera 11, twenty-two high-position driven wheel assemblies 13, thirty-four low-position driven wheel assemblies 14, eight driving wheel assemblies 15, two transverse guiding mechanisms 16, four jacking mechanisms 17, fourteen cushion disks 18, six driven wheel steering cylinders 19, six driven wheel steering mechanisms 20, fifty-six steering push rods 21, and two main engine unloading cylinders 22.

[0044] Although the present invention has been disclosed above in preferred embodiments, the embodiments are not intended to limit the present invention. Any equivalent changes or modifications made without departing from the spirit and scope of the present invention also fall within the protection scope of the present invention. Therefore, the protection scope of the present invention should be defined by the content defined in the claims of this application.

Claims

1. A large cylindrical member carrier vehicle, comprising a carrying platform frame, a high-position driven wheel assembly (13), a low-position driven wheel assembly (14), and a driving wheel assembly (15), characterized in that, The carrying platform frame includes a frame and mounting seats (12). The frame includes a keel (1), two longitudinal beams (3), multiple cross beams, two longitudinal load-bearing circular tubes (6), and two longitudinal support plates (4). The keel (1) is located on the longitudinal symmetry center line of the carrying platform frame. The upper edge surface of the cross beam has a curvature that matches the outer surface of the cylindrical member. The two longitudinal beams (3), the two longitudinal load-bearing circular tubes (6), and the two longitudinal support plates (4) are arranged symmetrically on both sides of the keel (1) in sequence from the inside to the outside. The keel (1), the two longitudinal beams (3), the two longitudinal load-bearing circular tubes (6), and the two longitudinal support plates (4) are perpendicularly installed with multiple cross beams to form the structure of the frame. The longitudinal support plate (4) is a T-shaped steel. The upper surface of the flange of the T-shaped steel is a rectangular strip-shaped plane, and this rectangular strip-shaped plane is higher than the space plane formed by the upper edge surfaces of multiple cross beams. When carrying the cylindrical member, this rectangular strip-shaped plane directly contacts the outer surface of the cylindrical member. There are multiple mounting seats (12), and the mounting seats (12) are fixedly installed between the two ends of adjacent cross beams on the same side of the keel (1) for installing the high-position driven wheel assembly (13) or the driving wheel assembly (15). The low-position driven wheel assembly (14) includes a mounting hoop seat and a short load-bearing composite rod. There are multiple low-position driven wheel assemblies (14), and they are symmetrically installed in pairs on the two longitudinal load-bearing circular tubes (6) through their respective mounting hoop seats. There are multiple high-position driven wheel assemblies (13), and they are symmetrically installed in pairs on the frame of the carrying platform through the mounting seats (12). The high-position driven wheel assembly (13) has a long load-bearing composite rod, and its length is longer than the short load-bearing composite rod of the low-position driven wheel assembly (14). There are multiple driving wheel assemblies (15), and they are symmetrically installed in pairs on the frame of the carrying platform through the mounting seats (12). The large cylindrical member carrier vehicle further includes a fixed seat (9) and a longitudinal hand-held guiding wheel (10). The fixed seat (9) is fixedly installed on the keel (1) at the longitudinal two ends of the frame of the carrying platform. One end of the wheel axle of the longitudinal hand-held guiding wheel (10) is hinged to the fixed seat (9). When the carrying platform moves longitudinally, the longitudinal hand-held guiding wheel (10) is lowered, and the axis of the longitudinal hand-held guiding wheel (10) is perpendicular to the ground. The longitudinal hand-held guiding wheel (10) rolls in cooperation with the side wall of the longitudinally shifted guiding groove opened on the ground. The large cylindrical member carrier vehicle further includes a lateral guiding mechanism (16). The lateral guiding mechanism includes lateral guiding wheels. When the carrying platform moves laterally, the lateral guiding wheels are lowered, and the axes of the lateral guiding wheels are perpendicular to the ground. The lateral guiding wheels roll in cooperation with the side wall of the laterally shifted guiding groove opened on the ground. The large cylindrical component carrier vehicle further includes a plurality of cushion discs (18) installed under the frame. The cushion discs (18) include a cushion seat and a disc body. The cushion seat is fixedly installed on the frame, and the disc body is connected to the cushion seat by a screw. Rotating the disc body can adjust the distance between the disc body and the ground. When the load is too large, the disc body touches the ground to protect the high-position driven wheel assembly (13), the low-position driven wheel assembly (14) and the driving wheel assembly (15), and prevent damage to the road surface.

2. The large cylindrical member carrier vehicle according to claim 1, characterized in that, The frame of the load-bearing platform is divided into three parts: the first section, the middle section and the last section. The cross beams in each of the first section, the middle section and the last section are divided into two end cross beams (2) and a plurality of intermediate cross beams (5). The end cross beams (2) at one end of the first section and the last section are respectively butted and bolted to the end cross beams (2) at both ends of the middle section.

3. The large cylindrical component carrier vehicle according to claim 1, wherein, The lateral guiding mechanism (16) further includes a lifting oil cylinder. The free end of the piston rod of the lifting oil cylinder is connected to a lateral guiding wheel. The lifting oil cylinder can push the lateral guiding wheel against the ground to play a braking role.

4. The large cylindrical member loading vehicle according to claim 2, characterized in that, It further includes a block socket (8), a block and a main machine unloading oil cylinder (22). The block socket (8) is installed on the end cross beam (2) at the outer end of the first section of the frame. The block is inserted into the block socket (8) to block the longitudinal sliding of the large cylindrical component on the load-bearing platform. The cylinder body of the main machine unloading oil cylinder (22) is installed on the end cross beam (2) at the outer end of the last section of the frame. The piston of the main machine unloading oil cylinder (22) points to the first section and is used to push the large cylindrical component out of the load-bearing platform.

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