Beam transporting vehicle shared by single line and double lines and single line and double line switching method thereof

Abstract

The invention belongs to the technical field of girder transporting equipment, and discloses a girder transporting vehicle shared by single and double lines and a single and double line switching method thereof, the girder transporting vehicle can be matched with various types of bridge erecting machines for use, one machine has multiple purposes, a vehicle frame is provided with two rows of double-line positions and two rows of single-line positions located on the inner sides of the two rows of double-line positions in the first direction, and the two rows of single-line positions are arranged in the second direction. The beam transporting vehicle shared by the single line and the double lines has a single-line mode and a double-line mode, in the single-line mode, the multiple walking devices are sequentially installed at the multiple single-line positions so as to transport single-line beams, and in the double-line mode, the multiple walking devices are sequentially installed at the multiple double-line positions so as to transport double-line beams. The frame is lifted and stably supported at the preset height through the supporting columns, the multiple suspension assemblies installed at the single-line positions or the double-line positions are detached, the multiple suspension assemblies are sequentially installed at the multiple double-line positions or the multiple single-line positions, the frame is put down, and then rapid switching between the single-line mode and the double-line mode is achieved. And the conveying of single-line beams and double-line beams is met, the universality is high, vehicles are saved, and the construction cost is reduced.

Description

Technical Field

[0001] The present invention relates to the technical field of beam transport equipment, and in particular to a beam transport vehicle for use with single and double lines and a single and double line switching method thereof. Background Art

[0002] A beam transporter, also known as a bridge transporter or a beam carrier, is a heavy-duty vehicle specially used to transport large prefabricated bridge components (such as beams, slabs, etc.). Beam transporters are widely used in highway, railway construction, and urban infrastructure construction.

[0003] With the rapid development of my country's high-speed rail industry, the original T-beams have been upgraded to single-line beams for conversions between high-speed rail trunk lines, and conversions between station lines and high-speed rail trunk lines and existing conventional railway lines. Beams are now divided into single-line and double-line beams, but most of the existing beam transport vehicles can only meet the transportation and erection construction of single beams, that is, single-line beam transport vehicles can only transport and erect single-line beams, and double-line beam transport vehicles can only transport and erect double-line beams. The scope of application is relatively narrow, and it is impossible to simultaneously meet the transportation and erection of single and double-line beams. Therefore, two or more different beam transport vehicles are required during the construction process, resulting in increased equipment investment costs. Summary of the invention

[0004] The purpose of the present invention is to provide a beam transport vehicle for use with both single and double tracks, which can meet the transportation needs of single-track beams and double-track beams, has strong versatility, saves vehicle use, and reduces construction costs.

[0005] To achieve this object, the present invention adopts the following technical solutions:

[0006] A beam transport vehicle for use with single and double tracks, comprising:

[0007] A frame and multiple running devices, the frame is provided with two rows of double-track positions and two rows of single-track positions located inside the two rows of double-track positions along a first direction, the beam transport vehicle shared by the single and double tracks has a single-track mode and a double-track mode, in the single-track mode, multiple running devices are sequentially installed at multiple single-track positions to transport single-track beams; in the double-track mode, multiple running devices are sequentially installed at multiple double-track positions to transport double-track beams, and the first direction is the length direction of the frame.

[0008] Preferably, the vehicle frame comprises a main beam, and the single-line position is arranged at the bottom of the main beam.

[0009] Preferably, the main beam comprises a driver end and a power end, the power end has two groups of first positions X and one group of second positions Y, the driver end has one group of third positions Z and one group of fourth positions M, the first positions X and the third positions Z are located on the side wall of the main beam, and the second positions Y and the fourth positions M are located at the bottom of the main beam;

[0010] The single-track and double-track beam transport vehicle also includes a jacking device. In the single-track mode, the jacking device includes two groups, which are respectively installed at the second position Y and the fourth position M. In the double-track mode, the jacking device includes three groups, two of which are respectively installed at two groups of the first position X, and the other group of the jacking device is installed at the third position Z.

[0011] Preferably, the vehicle frame further comprises a plurality of connecting frames located on two side walls of the main beam, and the plurality of double-line positions are arranged at the bottom of the plurality of connecting frames in a one-to-one correspondence.

[0012] Preferably, the single-line positions of the two columns are arranged in one-to-one correspondence, and the two one-to-one corresponding single-line positions are arranged in a staggered manner.

[0013] Preferably, it also includes a cab, a first connecting seat is installed on the side wall of one end of the frame, and a second connecting seat is installed on the front side of one end of the frame, in the single-line mode, the cab is installed on the first connecting seat, and in the dual-line mode, the cab is installed on the second connecting seat.

[0014] Preferably, the lifting device comprises two supporting legs detachably connected to the frame and a lifting member mounted on the supporting legs.

[0015] Preferably, the single-line and double-line beam transport vehicle also includes a beam carrying device, which includes a driving assembly, a first slide plate and a second slide plate, wherein the first slide plate and the second slide plate are both slidably mounted on the top of the frame along the first direction, and the two ends of the single-line beam or the two ends of the double-line beam are respectively placed on the first slide plate and the second slide plate, and the driving assembly is used to drive the first slide plate to slide so as to drive the single-line beam or the double-line beam to be transported into or out of the frame.

[0016] Preferably, the driving assembly includes a chain, a sprocket and a driving member, the chain is arranged at the top of the frame along the first direction, the sprocket is engaged with the chain, and the driving member is connected to the first skateboard for driving the sprocket to rotate along the chain to drive the first skateboard to slide.

[0017] Preferably, a plurality of the walking devices are arranged in groups, and each group of the walking devices is connected by a connecting rod mechanism, the connecting rod mechanism includes a steering cylinder and a connecting rod, the connecting rod is rotatably connected between two adjacent walking devices, and the steering cylinder drives one of the walking devices to rotate so that the same group of the walking devices rotate synchronously through the connecting rod.

[0018] Another object of the present invention is to provide a method for switching between single-track and double-track beam transport vehicles, which can realize rapid switching between the single-track mode and the double-track mode of the above-mentioned single-track and double-track beam transport vehicles, and the operation is simple and convenient.

[0019] To achieve this object, the present invention adopts the following technical solutions:

[0020] A method for switching between single and double tracks of a beam transport vehicle using a single or double track, comprising the following steps:

[0021] S1, the output end of the lifting device extends to lift the frame, and then the support column is supported in the middle area of ​​the bottom of the frame, and the height of the support column is the same as the height of the frame lifted by the lifting device;

[0022] S2, the output end of the lifting device is retracted, a support column is placed below the output end of the lifting device, the output end of the lifting device is extended again to lift the frame, and a support column is installed on the support column in the middle area of ​​the bottom of the frame, and this step is repeated until the frame rises to a preset height;

[0023] S3, dismantling the running device connected to the single-line position or the double-line position, and installing it to the double-line position or the single-line position to be switched;

[0024] S4, the output end of the jacking device is retracted, and the support column below the output end of the jacking device is removed. Then the output end of the jacking device is extended again and supported on the support column, and the support column in the middle area of ​​the bottom of the frame is removed. This step is repeated until all the support columns are removed to complete the single-double line switching.

[0025] As a preference,

[0026] In the single-line mode, two sets of the jacking devices are installed at the second position and the fourth position, and the cab is installed at the first connecting seat of the frame;

[0027] In the dual-line mode, two groups of the jacking devices are respectively installed at two groups of first positions, another group of the jacking devices is installed at a third position, and the cab is installed at the second connecting seat of the frame.

[0028] As a preference,

[0029] During the switching from the dual-line mode to the single-line mode, the two sets of the jacking devices installed at the two first positions of the power end and the one set of the jacking devices installed at the third position of the driver end are removed, and the two sets of the jacking devices are installed at the second position of the power end and the fourth position of the driver end;

[0030] In the process of switching from the single-line mode to the dual-line mode, a group of the lifting devices installed at the second position of the power end and a group of the lifting devices installed at the fourth position of the driver end are removed, and two groups of the lifting devices are installed at the two first positions of the power end, and one group of the lifting devices is installed at the third position of the driver end.

[0031] Preferably, the method further includes a beam transporting step, which includes adjusting the positions of the first slide plate and the second slide plate by means of a beam carrying device so that the distance between the center position a of the line connecting the first slide plate and the second slide plate and the center position b of the frame meets a preset range, and then placing the two ends of the single-line beam or the two ends of the double-line beam on the first slide plate and the second slide plate.

[0032] Beneficial effects of the present invention:

[0033] 1. The present invention can be used in conjunction with various types of bridge erection machines, so one machine can be used for multiple purposes;

[0034] 2. The present invention has high versatility by installing multiple running devices in multiple single-line positions or multiple double-line positions in a one-to-one correspondence, thereby switching between the single-line mode and the double-line mode;

[0035] 3. The present invention can realize rapid switching between single-line mode and double-line mode by arranging a jacking device to lift the frame and using a support column to stably support the frame at a preset height, without the need for a large-tonnage crane, and the operation is simple and convenient;

[0036] 4. The present invention can balance the local load of the top cover plate of the frame and improve safety by staggering the two rows of single-line positions;

[0037] 5. The present invention provides a first slide plate and a second slide plate to drive the beam to be transported in and out, thereby reducing the height of the whole vehicle and meeting the requirements of passing through the tunnel;

[0038] 6. The present invention realizes overall steering by setting a connecting rod mechanism, reduces potential failure points during operation, and facilitates later maintenance. In addition, by setting the interior of the connecting rod mechanism as a self-lubricating spherical bearing, it reduces the number of disassembly and maintenance points, saving time for disassembly and conversion and later regular maintenance;

[0039] 7. The present invention uses a variable frequency motor reducer sprocket chain drive, so it runs smoothly and has good synchronization. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a structural schematic diagram of a beam transport vehicle for use with single and double tracks provided in an embodiment of the present invention;

[0041] Figure 2 yes Figure 1 A partial enlarged view of the middle A;

[0042] Figure 3 is a top view of a frame provided by an embodiment of the present invention;

[0043] Figure 4 yes Figure 3 A partial enlarged view of point B in the middle;

[0044] Figure 5 is a schematic structural diagram of a frame provided by an embodiment of the present invention;

[0045] Figure 6 It is a bottom view of a beam transport vehicle in single-line mode for use with single and double lines provided by an embodiment of the present invention;

[0046] Figure 7 It is a top view of a beam transport vehicle in double-track mode for use with single and double tracks provided by an embodiment of the present invention;

[0047] Figure 8 is a top view of a partial structure of a walking device provided by an embodiment of the present invention;

[0048] Fig. 9 is a side view of a partial structure of a walking device provided by an embodiment of the present invention;

[0049] Fig.10 yes Fig. 9 A partial enlarged view of point C in the middle;

[0050] Fig.11 is a schematic diagram of the structure of the power end provided by an embodiment of the present invention;

[0051] Fig.12 is a schematic diagram of the structure of the driver terminal provided by an embodiment of the present invention;

[0052] Fig.13 It is a side view of a beam transport vehicle for use with single and double tracks provided by an embodiment of the present invention;

[0053] Fig.14 yes Fig.13 A partial enlarged view of point D in the middle;

[0054] Fig.15 It is a front view of a beam transport vehicle for use with single and double tracks provided by an embodiment of the present invention;

[0055] Fig.16 is a structural schematic diagram of a support beam device provided by an embodiment of the present invention;

[0056] Fig.17 is a schematic structural diagram of a first slide plate provided by an embodiment of the present invention;

[0057] Fig.18 is a schematic structural diagram of a second slide plate provided by an embodiment of the present invention;

[0058] Fig.19 Schematic diagram of the single-line and double-line switching process provided by the embodiment of the present invention Figure 1 ;

[0059] Fig. 20 Schematic diagram of the single-line and double-line switching process provided by the embodiment of the present invention Figure 2 .

[0060] In the figure:

[0061] 1. Frame; 11. Segmentation; 12. Tension screw; 13. Connector; 131. Mounting hole; 14. Single-line position; 15. Double-line position; 16. Connecting frame; 17. First connecting seat; 18. Second connecting seat; 19. Slide rail;

[0062] 21, wheel set; 211, coupling; 212, tire; 22, suspension assembly; 221, chassis; 222, turntable; 2221, steering plate; 223, suspension parts; 224, hinged parts; 231, steering cylinder; 232, connecting rod;

[0063] 3. Lifting device; 31. Support legs; 32. Lifting parts;

[0064] 4. Cab; 401. Supporting parts;

[0065] 5. beam device; 511. chain; 512. driving member; 513. connecting rod; 52. first slide plate; 521. first groove; 53. second slide plate; 531. second groove;

[0066] 6. Support column;

[0067] X, first position; Y, second position; Z, third position; M, fourth position. DETAILED DESCRIPTION

[0068] The present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It is to be understood that the specific embodiments described herein are only used to explain the present invention, rather than to limit the present invention. It should also be noted that, for ease of description, only parts related to the present invention, rather than all structures, are shown in the accompanying drawings.

[0069] In the description of the present invention, unless otherwise clearly specified and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0070] In the present invention, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0071] In the description of this embodiment, the terms "upper", "lower", "right", etc., directions or positional relationships are based on the directions or positional relationships shown in the drawings, and are only for the convenience of description and simplification of operation, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as limiting the present invention. In addition, the terms "first" and "second" are only used to distinguish in the description and have no special meaning.

[0072] The present embodiment provides a beam transport vehicle for both single-track and double-track applications, which has a single-track mode and a double-track mode. Single-track beams are transported in the single-track mode, and double-track beams are transported in the double-track mode. The present embodiment can simultaneously meet the transportation needs of single-track beams and double-track beams, has strong versatility, saves vehicle usage, and reduces construction costs.

[0073] It should be noted that this embodiment can be used in conjunction with various types of bridge erecting machines, for example, it can be used in conjunction with an 800t single- and double-track bridge erecting machine to erect double-track beams of 800t and below and single-track beams of 500t and below; it can be used in conjunction with a 900t bridge erecting machine and a 1000t bridge erecting machine to construct double-track box beams of 800t and below; and it can be used in conjunction with a bridge erecting machine to erect single-track beams. This embodiment is used to transport prestressed reinforced concrete beam pieces of high-speed railway box beams with a span of 32m and below. One set of equipment can simultaneously meet the erection of single- and double-track box beams of high-speed railways and beam pieces of intercity railways (such as 35-meter urban railway beams).

[0074] See also Figure 1-Figure 18 A beam transport vehicle for single and double lines includes a frame 1, which is used to load single-line beams or double-line beams.

[0075] The vehicle frame 1 provided in this embodiment is a segmented assembly structure to adapt to single-wire beams or double-wire beams of different specifications.

[0076] For example, see Figure 3-Figure 5 This embodiment provides a segmented assembly structure of a frame 1, wherein the frame 1 is formed by connecting a plurality of segments 11 end to end. Figure 4 , two adjacent segments 11 are connected by a plurality of tension screws 12 .

[0077] For details, please continue to see Figure 5 The two adjacent segments 11 are connected at both ends by two connecting pieces 13 , and the two connecting pieces 13 are connected by a plurality of tension screws 12 .

[0078] Continue reading Figure 5 , the front and rear ends of the segments 11 are both provided with mounting grooves, the connector 13 is embedded in the mounting grooves, and the connector 13 is circumferentially welded to the groove wall of the corresponding mounting groove. Further preferably, the connector 13 is provided with a plurality of mounting holes 131 at intervals, and the mounting holes 131 are arranged through the thickness direction of the connector 13, and the plurality of tension screws 12 pass through the plurality of mounting holes 131 on the front end connector 13 of one of the two adjacent segments 11 one by one, and are screwed to the corresponding mounting holes 131 on the rear end connector 13 of the other segment 11, thereby completing the assembly between the two adjacent segments 11.

[0079] In this embodiment, the plurality of mounting holes 131 on the connector 13 are arranged in two rows, one above the other, to improve the connection strength between the segments 11. In other feasible embodiments, the mounting holes 131 on the connector 13 may also be arranged in other ways, which are not specifically limited here.

[0080] See also Figure 2 This embodiment also includes multiple traveling devices, which are installed on the frame 1. The traveling devices are used to realize the movement of the frame 1. The beam transport vehicle shared by single and double lines has a single-line mode and a two-way mode. The traveling devices are installed at different positions of the frame 1 in the single-line mode and the double-line mode.

[0081] Specifically, see Figure 3 and Figure 6 The frame 1 is provided with two rows of single-line positions 14 along the first direction, and each row is provided with a plurality of single-line positions 14 at intervals. In the single-line mode, by providing the plurality of single-line positions 14, a plurality of running devices are divided into two rows and are installed one by one in the two rows of single-line positions 14. It should be noted that the first direction is the length direction of the frame 1, and the single-line positions 14 are provided at the bottom of the frame 1.

[0082] Preferably, the frame 1 comprises a main beam, and the single-line position 14 is arranged at the bottom of the main beam. Further preferably, a flange is installed on the single-line position 14, and the running device flange is connected to the main beam.

[0083] Preferably, the two columns of single-line positions 14 installed on the main beam are arranged in one-to-one correspondence, the spacing between two adjacent single-line positions 14 in the same column is the same, and the distances between multiple single-line positions 14 and the symmetry axis of the main beam parallel to the first direction are equal. Through the above-mentioned arrangement, after multiple walking devices are installed correspondingly at multiple single-line positions 14, it can ensure that the local load of the single-line beam on the top cover plate of the main beam is balanced during beam transportation, thereby improving the stability of the construction support.

[0084] Furthermore, in the single-track mode, the edge of the single-track beam extends out of the frame 1, see Figure 6 At this time, the walking device is installed at the two single-line positions 14 at the bottom of the main beam, that is, the positive projection of the single-line beam falls on the outside of the main beam, resulting in the stress of the single-line beam being concentrated on the top cover of the main beam, and the local load on the top cover of the main beam is too high. Therefore, please refer to Figure 6 and Figure 7 In this embodiment, two rows of single-line positions 14 corresponding to each other on both sides of the bottom of the main beam are staggered. That is, after multiple traveling devices are installed correspondingly at multiple single-line positions 14, the two corresponding traveling devices on both sides are staggered to balance the local load on the top cover plate of the main beam, ensure that the local load on the top cover plate of the main beam is within a safe range when transporting the single-line beam, avoid overloading, and ensure safety.

[0085] In this embodiment, the distance between the axes of two corresponding single-line positions 14 is set to 150mm-250mm. Preferably, the distance between the axes of the two corresponding single-line positions 14 is 200mm, thereby achieving the best effect of balancing the local load of the top cover plate of the main beam.

[0086] For details, please continue to see Figure 6 The frame 1 is also provided with two rows of double-line positions 15 on both sides along the first direction, and each row is provided with a plurality of double-line positions 15 at intervals, see Figure 7 In the double-track mode, by setting the above-mentioned multiple double-track positions 15, multiple running devices are divided into two rows and installed one by one in the two rows of double-track positions 15. It should be noted that the two rows of single-track positions 14 are located inside the two rows of double-track positions 15.

[0087] Optionally, see Figure 6 , multiple connecting frames 16 are installed at intervals on both side walls of the main beam along the first direction, multiple connecting frames 16 on the same side are arranged at intervals along the first direction, the connecting frames 16 extend away from the frame 1, and two rows of double-track positions 15 are installed one by one at the bottom of the connecting frames 16 on both sides. Further preferably, a flange is installed on the double-track position 15, and the running device flange is connected to the connecting frame 16.

[0088] Preferably, the two columns of double-track positions 15 are arranged in one-to-one correspondence, the spacing between two adjacent double-track positions 15 in the same column is the same, and the distances between the multiple double-track positions 15 and the symmetry axis of the main beam parallel to the first direction are equal. Through the above-mentioned arrangement, after the multiple walking devices are installed correspondingly at the multiple double-track positions 15, the local load of the double-track beam on the top cover plate of the main beam is balanced during the beam transportation process, thereby improving the stability of the construction support.

[0089] The present embodiment provides a beam transport vehicle for use with both single and double tracks. In the single-track mode, multiple running devices are installed one-to-one at multiple single-track positions 14 to transport single-track beams. Since the width of a double-track beam is much larger than that of a single-track beam, the present embodiment provides a beam transport vehicle for use with both single and double tracks. In the double-track mode, multiple running devices are installed one-to-one at multiple double-track positions 15 to transport double-track beams, thereby ensuring that the vehicle frame 1 can stably support the double-track beams.

[0090] See also Figure 2 A beam transport vehicle for use with both single and double tracks also includes a cab 4 , which is mounted on a vehicle frame 1 , and an operator operates in the cab 4 .

[0091] Since the widths of the single-line beam and the double-line beam are different, the space occupied by the overall structure during transportation is different. In order to ensure the driving field of vision, the installation position of the cab 4 in the single-line mode and the double-line mode is different, that is, the position of the cab 4 in the width direction of the frame 1 is adjusted.

[0092] For example, see Figure 1 and Figure 2 The side wall of the end of the frame 1 along the first direction is installed with a first connection seat 17, and the front side of the end is installed with a second connection seat 18. Preferably, the second connection seat 18 is installed on the connection frame 16 of the end, and the first connection seat 17 and the second connection seat 18 are both located at one end of the frame 1 in the first direction. In the single-line mode, the cab 4 is installed on the first connection seat 17, and in the dual-line mode, the cab 4 is installed on the second connection seat 18, so as to achieve the purpose of adjusting the position of the cab 4 in the width direction of the frame 1. By installing the second connection seat 18 on the front side of the first connection seat 17, it is also possible to avoid the connection frame 16 affecting the installation of the cab 4 in the single-line mode.

[0093] Preferably, referring to 2, a support member 401 is provided at the back of the cab 4, and the end of the support member 401 is rotatably mounted on the first connection seat 17 or the second connection seat 18 through a pin shaft, and the axis of the pin shaft is vertically arranged. Through the above arrangement, when the single-line beam or double-line beam is transported into or out of the frame 1 from one end of the frame 1, the cab 4 near the end is rotated to avoid the single-line beam or double-line beam. In the single-line mode, before the single-line beam is transported into or out of the frame 1 from one end of the frame 1, the connecting frame 16 at the end of the frame 1 and close to the cab 4 is disassembled to ensure that the cab 4 at the end can be rotated normally to avoid.

[0094] See also Figure 1 and Figure 6 The two ends of the main beam in the first direction are the driver end and the power end respectively. Adaptively, the present embodiment includes two cabs 4, which are respectively located at the driver end and the power end. When the frame 1 moves forward in different directions, the operator is located in the corresponding cab 4.

[0095] See also Figure 6 and Figure 8 The traveling device includes a suspension assembly 22 installed on the frame 1 and a wheel set 21 installed on the suspension assembly. Multiple traveling devices are arranged at intervals along the first direction. In the single-line mode, one ends of the multiple suspension assemblies 22 are installed one by one at multiple single-line positions 14 to transport single-line beams. In the double-line mode, one ends of the multiple suspension assemblies 22 are installed one by one at multiple double-line positions 15 to transport double-line beams.

[0096] Specifically, see Fig. 9 and Fig.10 The suspension assembly 22 includes a chassis 221 and a turntable 222. A flange is provided on the top of the chassis 221. The chassis 221 is connected to the single-line position 14 or the double-line position 15 through the flange. The turntable 222 is rotatably mounted on the bottom of the chassis 221. The rotation axis of the turntable 222 is vertical, and the wheel set 21 is mounted on the turntable 222. Through the above arrangement, the corresponding wheel set 21 can be rotated by driving the turntable 222 to rotate along its rotation axis, thereby realizing the steering of the frame 1.

[0097] Furthermore, the suspension assembly 22 also includes a suspension member 223 and a hinge member 224. One end of the suspension member 223 is mounted on the bottom of the turntable 222, one end of the hinge member 224 is hinged to the other end of the suspension member 223 through a pin, and the other end of the hinge member 224 is connected to the corresponding wheel set 21. Preferably, the axis of the pin is horizontal, that is, the rotation axis of the hinge member 224 is horizontally arranged.

[0098] Furthermore, the walking device further includes a rotating drive member, which is mounted on the suspension assembly 22, and is configured to drive the hinge 224 to rotate along its rotation axis. Preferably, the rotating drive member is mounted on the suspension member 223 of the suspension assembly 22, and the driving end of the rotating drive member is connected to the hinge 224, or the rotating drive member is mounted on the hinge 224 of the suspension assembly 22, and the driving end of the rotating drive member is connected to the suspension member 223, which is not specifically limited here, and can realize the rotation of the hinge 224 along the axis of the pin.

[0099] Through the above arrangement, on the one hand, the wheel set 21 can be recovered and lowered by rotation to adapt to the switching between the single-line mode and the double-line mode. For example, in this embodiment, the height of the double-line position 15 is higher than that of the single-line position 14. When the chassis 221 is flange-connected to the single-line position 14, the rotating drive member drives the hinge 224 to rotate along the axis of the pin, thereby shortening the distance between the wheel set 21 and the chassis 221, that is, shortening the height of the running device to adapt to the distance between the single-line position 14 and the ground; when the chassis 221 is flange-connected to the double-line position 15, the rotating drive member drives the hinge 224 to rotate in the opposite direction along the axis of the pin, thereby lengthening the distance between the wheel set 21 and the chassis 221, that is, lengthening the height of the running device to adapt to the distance between the double-line position 15 and the ground; on the other hand, when walking on a ramp or passing through an uneven road surface, the rotating drive member will automatically provide compensation adjustment, automatically adapt to the road conditions, and automatically adjust the load on the ground to make it uniform and consistent, thereby avoiding deformation of the frame 1.

[0100] Preferably, the distance between the wheel set 21 and the chassis 221 can be adjusted within a range of ±300 mm.

[0101] Optionally, see Figure 9-14 The wheel set 21 includes a connecting shaft 211 and a tire 212 rotatably mounted on the connecting shaft 211, and the connecting shaft 211 is mounted on the corresponding suspension assembly 22. For example, the wheel set 21 includes four tires 212, which are coaxially arranged and rotatably mounted on the connecting shaft 211. The other end of the hinge 224 is connected to the middle area of ​​the connecting shaft 211, two of which are mounted on one side of the hinge 224, and the other two tires 212 are mounted on the other side of the hinge 224 to improve the stability of the wheel set 21 and prevent tipping during transportation. In other feasible embodiments, each wheel set 21 can also be provided with a different number of tires 212, which is not specifically limited here.

[0102] See also Figure 8, multiple traveling devices are arranged in groups, and each group of traveling devices is connected by a connecting rod mechanism. By setting the connecting rod mechanism, the overall steering modes such as straight travel, eight-shaped steering and small-angle oblique travel can be realized. The connecting rod mechanism includes a steering cylinder 231 and multiple connecting rods 232. The multiple connecting rods 232 are respectively hinged on the turntables 222 of the suspension assemblies 22 in two adjacent traveling devices. The steering cylinder 231 drives the turntable 222 of one of the suspension assemblies 22, thereby driving the multiple turntables 222 and the wheel sets 21 thereon to steer synchronously. By setting the connecting rod mechanism to achieve synchronous rotation, the number of electronic control components driving the steering is reduced, thereby reducing the potential failure points in operation, reducing the disassembly and maintenance points, and facilitating later maintenance.

[0103] For example, a steering plate 2221 is provided on the side of the turntable 222 in each suspension assembly 22 facing away from the chassis 221, and the steering plate 2221 extends out of the turntable 222. Both ends of the connecting rod 232 are respectively hinged to the two adjacent steering plates 2221. The steering cylinder 231 is driven and connected to one of the steering plates 2221. The steering cylinder 231 is extended and retracted, thereby pushing the steering plate 2221 and the turntable 222 connected thereto to rotate, thereby driving the corresponding traveling device to turn. In this process, the steering plate 2221 drives the connecting rod 232 hinged thereto to move, and the connecting rod 232 drives the adjacent traveling devices to rotate, thereby realizing the synchronous rotation of the traveling devices of the same group.

[0104] Preferably, both ends of the connecting rod 232 are hinged to two adjacent steering plates 2221 through self-lubricating spherical bearings, thereby saving the cost of later disassembly and maintenance.

[0105] The walking devices in this embodiment are divided into four groups to form four turning areas. The four turning areas are arranged in a matrix. A connecting rod mechanism is corresponding to each turning area. Multiple walking devices in each turning area are synchronously turned by a connecting rod mechanism.

[0106] See also Figure 1 and Fig.15 The present embodiment further includes a lifting device 3, which is installed on the frame 1. The lifting device 3 can be raised and lowered relative to the frame 1 to lift the overall structure and assist in switching between the single-line mode and the dual-line mode.

[0107] See also Figure 6 and Fig.12 The lifting device 3 includes two support legs 31 detachably connected to the frame 1, and a lifting member 32 is installed on the support legs 31. The two support legs 31 are distributed along the second direction to balance the load during the lifting process. The lifting member 32 is a jack, and the second direction is the width direction of the frame 1. Preferably, the opposite side walls of the support legs 31 are provided with connection holes, and a flange is provided on the top of the support legs 31.

[0108] During the operation of the lifting member 32 , a steel plate or a wooden pad is placed under the supporting surface of the lifting member 32 to increase the contact area and protect the lower disk of the lifting member 32 .

[0109] See also Figure 3 , Fig.11 and Fig.12 In this embodiment, the power end of the main beam has two groups of first positions X and one group of second positions Y, and the driver end has one group of third positions Z and one group of fourth positions M. The first positions X and the third positions Z are located on the side wall of the main beam, and the second positions Y and the fourth positions M are located at the bottom of the main beam.

[0110] In the single-line mode, the jacking device 3 includes two groups, which are respectively installed at the second position Y and the fourth position M. Specifically, the tops of the supporting legs 31 in the above two groups of jacking devices are flange-connected to the bottom of the main beam.

[0111] In the dual-line mode, the jacking device 3 includes three groups, two groups of jacking devices 3 are respectively installed at two groups of first positions X, and the other group of jacking devices 3 is installed at the third position Z, and the side walls of the supporting legs 31 in the above three groups of jacking devices 3 are bolted to the side walls of the main beam through their reserved connection holes.

[0112] It should be noted that when switching from the dual-line mode to the single-line mode, a set of jacking devices 3 located at the third position Z at the driver's end needs to be removed to avoid affecting the swing of the cab 4 at the driver's end.

[0113] In addition, in the double-track mode, if a double-track beam with a load-bearing specification of 32.6m and 800t is required, three sets of jacking devices 3 work simultaneously to support and lift the frame 1; if a double-track beam with a load-bearing specification below 32.6m and 800t is required, only one set of jacking devices 3 located at the first position X and one set of jacking devices 3 located at the third position Z work to support and lift the frame 1.

[0114] A beam transport vehicle for use with single or double lines also includes a beam carrying device 5, which is installed on the frame 1 and is used to cooperate with the bridge erection machine to assist in transporting the single-line beam or the double-line beam into or out of the frame 1.

[0115] See also Figure 2 , Fig.13 , Fig.14 and Fig.16 The carrying beam device 5 includes a driving component, a first slide plate 52 and a second slide plate 53. The first slide plate 52 and the second slide plate 53 are slidably installed on the top of the frame 1 along a first direction. During transportation, the two ends of the single-line beam or the two ends of the double-line beam are placed on the first slide plate 52 and the second slide plate 53 respectively. The driving component drives the first slide plate 52 to slide, thereby driving the single-line beam or the double-line beam to be transported into or out of the frame 1 along the length direction of the frame 1.

[0116] Preferably, the height of the first slide plate 52 and the second slide plate 53 is 0.2-0.3 m. By providing the first slide plate 52 and the second slide plate 53, on the one hand, the convenience of transporting the single-line beam or double-line beam into the frame 1 is improved, and the single-line beam or double-line beam can be stably placed on the frame 1. On the other hand, by providing the first slide plate 52 and the second slide plate 53 with lower heights, the height of the whole vehicle passing through the tunnel is reduced.

[0117] Furthermore, rubber pads are provided at the tops of both ends of the first slide plate 52 and both ends of the second slide plate 53 to buffer the pressure of the single-line beam or the double-line beam on the first slide plate 52 and the second slide plate 53 .

[0118] Specifically, see Figure 2 and Fig.14 Two slide rails 19 are arranged at intervals on the top of the main beam, and the two slide rails 19 are arranged along the first direction. The two ends of the first slide plate 52 are respectively slidably connected to the two slide rails 19, and the two ends of the second slide plate 53 are respectively slidably connected to the two slide rails 19. In the operating range of the beam-carrying device 5, there are no other devices except the slide rails 19, so as to ensure smooth beam feeding.

[0119] Preferably, see Fig.17 and Fig.18 The bottom of the first slide plate 52 is provided with two first grooves 521 at intervals, and the two slide rails 19 are respectively clamped in the two first grooves 521 at the bottom of the first slide plate 52, and the outer wall of the slide rail 19 is circumferentially abutted against the groove wall of the first groove 521; similarly, the bottom of the second slide plate 53 is provided with two second grooves 531 at intervals, and the two slide rails 19 are respectively clamped in the two second grooves 531 at the bottom of the second slide plate 53, and the outer wall of the slide rail 19 is circumferentially abutted against the groove wall of the second groove 531. Further preferably, the cross section of the slide rail 19 is rectangular.

[0120] For example, both ends of the slide rail 19 extend to both ends of the main beam in the length direction, thereby improving the utilization rate of the length space of the frame 1, ensuring that the single-line beam or double-line beam can be loaded on the frame 1 as a whole, and preventing the ends of the single-line beam or double-line beam from being suspended in the air.

[0121] Preferably, a buckle and a slot are respectively provided on the side where the first slide plate 52 and the second slide plate 53 are close to each other, and the buckle is locked in the slot to achieve the connection between the first slide plate 52 and the second slide plate 53. In the idle state, the first slide plate 52 is driven to slide, and the first slide plate 52 and the second slide plate 53 are connected through the buckle slot structure, and the first slide plate 52 is further driven to slide, and the second slide plate 53 is driven to slide to the front end of the frame 1, so as to achieve the effect of storing and adjusting the position of the second slide plate 53.

[0122] See also Fig.16The driving assembly includes a chain 511, a sprocket and a driving member 512. The chain 511 is arranged on the top of the frame 1 along the first direction. One end of the chain 511 is fixed to one end of the frame 1 in the first direction. The other end of the chain 511 is fixed to the other end of the frame 1 in the first direction. The sprocket is meshed with the chain 511, that is, the teeth of the sprocket are engaged with the tooth grooves of the chain 511, and the pitch of the chain 511 matches the tooth pitch of the sprocket. The driving member 512 is connected to the axis of the sprocket, and the driving member 512 is used to drive the sprocket to rotate. Through the above arrangement, since the position of the chain 511 is fixed, during the rotation of the sprocket, the teeth on the sprocket can be sequentially engaged with the tooth grooves on the chain 511, thereby realizing the rotation of the sprocket along the chain 511.

[0123] Preferably, fixing seats are respectively installed at both ends of the frame 1 in the length direction, and both ends of the chain 511 are respectively fixed to the corresponding fixing seats to improve the installation strength of the chain 511 and ensure the tension of the chain 511.

[0124] Specifically, the chain 511 and the fixing seat are both arranged on the top of the main beam.

[0125] For example, the present embodiment is provided with two chains 511, and two sprockets are adapted to be respectively matched with the two chains 511, and the two sprockets move synchronously, thereby improving the transmission stability. Optionally, the rotation of the two sprockets is realized by one driving member 512 or two driving members 512. When only one driving member 512 is provided, the two sprockets are connected by a rotating shaft, and the driving member 512 is driven and connected to the rotating shaft. When two driving members 512 are provided, the two driving members 512 are respectively driven and connected to the axles of the two sprockets. The number of driving members 512 is not specifically limited here, and it is sufficient that the synchronous movement of the sprockets can be realized.

[0126] Preferably, the driving member 512 uses a variable frequency motor reducer, which has stable operation and good synchronization.

[0127] The driving assembly also includes a housing, and the driving member 512 and the sprocket are both arranged inside the housing. Furthermore, a through slot is provided at the bottom of the housing, and the bottom of the sprocket extends out of the through slot to ensure that the sprocket can smoothly engage with the chain 511.

[0128] Preferably, the first slide plate 52 is connected to the housing, thereby connecting the drive assembly and the first slide plate 52, so that the drive assembly drives the first slide plate 52 to slide along the slide rail 19. Further preferably, please refer to Fig.17 The first slide plate 52 is connected to the housing via a connecting rod 513, one end of the connecting rod 513 is connected to the housing, and the other end is connected to the first slide plate 52. A plurality of connecting rods 513 may be provided to improve the connection stability between the housing and the first slide plate 52, and the specific number is determined according to actual conditions and is not specifically limited here.

[0129] The process of the beam-carrying device 5 transporting the single-line beam or double-line beam into or out of the frame 1 is specifically as follows:

[0130] According to the specifications of the beam to be transported, the positions of the first slide 52 and the second slide 53 are adjusted so that the distance between the center position a of the line connecting the first slide 52 and the second slide 53 and the center position b of the frame 1 meets the preset range, and at the same time, the spacing between the first slide 52 and the second slide 53 is equal to the length of the beam to be transported, thereby ensuring that the load on the cover plate of the frame 1 is uniform and the beam to be transported can be stably transported. The bridge-building machine places one end of the single-line beam or double-line beam on the first slide 52, and the other end of the single-line beam or double-line beam is stably placed on the second slide 53. The driving component drives the first slide 52 to slide along the slide rail 19, thereby driving the single-line beam or double-line beam to follow the first slide 52 to gradually enter or exit the frame 1. After completion, the first slide 52 and the second slide 53 return to the corresponding positions according to the specifications of the next beam to be transported.

[0131] Optionally, the preset range of the distance between a and b can be 0, that is, the distance between a and b is 0, and further optionally, it can also be 2800-3500 mm, preferably 3000 mm. For beams of different lengths to be transported, an applicable preset range is set to ensure a more uniform load distribution and a more stable beam transport vehicle when transporting beams.

[0132] In this embodiment, by providing a carrying beam device 5, on the one hand, it is convenient to transport a single-line beam or a double-line beam into or out of the frame 1; on the other hand, the driving member drives the first slide plate 52 to slide along the chain 511 to lower the height of the whole vehicle, thereby greatly reducing the height of the whole vehicle when passing through the tunnel.

[0133] It should be noted that before transporting a single-line beam or a double-line beam in or out, it is necessary to first place blocks on the outside of the two wheel sets 21 at one end of the first direction and on the outside of the two wheel sets 21 at the other end of the first direction to prevent the beam transport vehicle from moving during the process.

[0134] This embodiment also provides a method for switching between single-track and double-track beam transport vehicles, which is applied to the above-mentioned single-track and double-track beam transport vehicles and can achieve rapid switching between the single-track mode and the double-track mode of the above-mentioned single-track and double-track beam transport vehicles, and the operation is simple and convenient.

[0135] A method for switching between single and double lines of a beam transport vehicle provided in this embodiment comprises the following steps:

[0136] S1, the output end of the lifting device 3 extends to lift the frame 1, and then the support column 6 is supported in the middle area of ​​the bottom of the frame 1, and the height of the support column 6 is the same as the height of the lifting device 3 lifting the frame 1;

[0137] S2, the output end of the lifting device 3 is retracted, and a support column 6 is placed below the output end of the lifting device 3. The output end of the lifting device 3 is extended again to lift the frame 1, and a support column 6 is installed on the support column 6 in the middle area of ​​the bottom of the frame 1. This step is repeated until the frame 1 rises to a preset height;

[0138] S3, dismantle the running device connected to the single-line position 14 or the double-line position 15, and install it to the double-line position 15 or the single-line position 14 to be switched;

[0139] S4, the output end of the jacking device 3 is retracted, and the support column 6 below the output end of the jacking device 3 is removed. Then the output end of the jacking device 3 is extended again and supported on the support column 6, and the support column 6 in the middle area of ​​the bottom of the frame 1 is removed. Repeat this step until all the support columns 6 are removed to complete the single-double line switching.

[0140] Specifically, see Figure 1-Figure 20 The lifting device 3 lifts the frame 1 in multiple stages, which ensures the stable lifting of the frame 1 while reducing the working pressure of the lifting device 3.

[0141] First, a steel plate or a wooden pad is placed under the supporting surface of the lifting member 32, two or three groups of lifting devices 3 work simultaneously, the output end of the lifting member 32 in the lifting device 3 extends to lift the frame 1, and a support column 6 is installed in the middle area of ​​the bottom of the frame 1. The height of the support column 6 is the same as the height of the lifting member 32 lifting the frame 1 to ensure the stability of the frame 1;

[0142] Further, the output end of the lifting member 32 is retracted, and a support column 6 is installed below the lifting member 32 to stabilize the frame 1 at the first height, and the output end of the lifting member 32 is extended again to lift the frame 1. Similarly, a support column 6 is installed again in the middle area of ​​the bottom of the frame 1, and this step is repeated until the frame 1 rises to a preset height. Optionally, the preset height to which the frame 1 rises in this embodiment is 1000-2000 mm.

[0143] In this embodiment, the overflow pressure output value of the jacking member 32 during the lifting of the frame 1 is set to 25 MPa, the overflow pressure output value of the jacking member 32 during the transportation of the frame 1 in or out of the single-line beam or double-line beam is set to 21 MPa, and the maximum supporting force of the jacking member 32 is 65t.

[0144] After the frame 1 is lifted to a preset height, the rotating driving member drives the articulated member 224 to rotate along the axis of the pin shaft, shortening the distance between the tire 212 and the chassis 221 to a minimum, removing the suspension assembly 22 installed at each single-line position 14 or double-line position 15, and installing multiple suspension assemblies 22 one by one at the multiple double-line positions 15 or multiple single-line positions 14 to be switched, and the rotating driving member drives the articulated member 224 to rotate in the opposite direction along the axis of the pin shaft, thereby lengthening the distance between the tire 212 and the chassis 221.

[0145] Finally, the frame 1 below the jacking device 3 is lowered, and the frame 1 is lowered in multiple stages, specifically:

[0146] The output end of the lifting member 32 is retracted, and the support column 6 below the output end of the lifting member 32 is removed. Then the output end of the lifting member 32 is extended again and supported on the support column 6. The support column 6 in the middle area of ​​the bottom of the frame 1 is removed. Repeat this step until all the support columns 6 are removed, and the tire 212 can be stably supported on the ground. At this point, the frame 1 is lowered to complete the single-double line switching.

[0147] It should be pointed out that when switching between single and double lines, the position of the lifting device is also switched, specifically:

[0148] In the process of switching from the dual-line mode to the single-line mode, the two sets of jacking devices 3 installed at the two first positions X of the power end and the one set of jacking devices 3 installed at the third position Z of the driver end are removed, and the supporting legs 31 of the two sets of jacking devices 3 are connected to the second position Y of the power end and the fourth position M of the driver end through the top flange to support and lift the frame 1; through the above-mentioned setting, the swing of the cab 4 located at the driver end can be avoided from being affected.

[0149] In the process of switching from the single-line mode to the dual-line mode, a group of the jacking devices 3 installed at the second position Y of the power end and a group of the jacking devices 3 installed at the fourth position M of the driver end are removed, and the support legs 31 of the two groups of jacking devices 3 are respectively installed at the two groups of first positions X of the power end through the connecting holes, and then the support legs 31 of the other group of jacking devices 3 are installed at the third position Z of the driver end through the connecting holes.

[0150] In addition, in the double-track mode, if a double-track beam with a load-bearing specification of 32.6m and 800t is required, three sets of jacking devices 3 work simultaneously. If a double-track beam with a load-bearing specification below 32.6m and 800t is required, only one set of jacking devices 3 located at the first position X and one set of jacking devices 3 located at the third position Z are controlled to work.

[0151] When switching between single and double lines, the position of the cab 4 is also switched, specifically:

[0152] In the single-line mode, the cab 4 is installed on the first connection seat 17. When switching to the dual-line mode, the cab 4 is installed on the second connection seat 18. When switching from the dual-line mode to the single-line mode, the operation is reversed.

[0153] Furthermore, the method further includes a beam transporting step, specifically:

[0154] According to the specifications of the beam to be transported, the positions of the first slide plate 52 and the second slide plate 53 are adjusted so that the distance between the center position a of the line connecting the first slide plate 52 and the second slide plate 53 and the center position b of the frame 1 meets the preset range, and the bridge erecting machine places one end of the beam to be transported on the first slide plate 52, and the other end of the beam to be transported is stably placed on the second slide plate 53. The preset range of the distance between a and b can be 0, or 2800-3500mm, preferably 3000mm. Applicable preset ranges are set for beams of different lengths to ensure more uniform load distribution and more stability when the beam transport vehicle transports the beam.

[0155] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. For those skilled in the art, various obvious changes, readjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to list all the embodiments here. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A beam transport vehicle for single and double tracks, characterized in that: include: A vehicle frame and a plurality of traveling devices, wherein the vehicle frame is provided with two rows of double-track positions (15) along a first direction and two rows of single-track positions (14) located inside the two rows of double-track positions (15), and the beam transport vehicle for both single and double tracks has a single-track mode and a double-track mode. In the single-track mode, a plurality of the traveling devices are sequentially installed at a plurality of the single-track positions (14) to transport single-track beams; in the double-track mode, a plurality of the traveling devices are sequentially installed at a plurality of the double-track positions (15) to transport double-track beams, and the first direction is the length direction of the vehicle frame (1).

2. The beam transport vehicle for single and double tracks according to claim 1, characterized in that: The vehicle frame (1) comprises a main beam, and the single-line position (14) is arranged at the bottom of the main beam.

3. The beam transport vehicle for single and double tracks according to claim 2, characterized in that: The main beam comprises a driver end and a power end, the power end has two groups of first positions (X) and one group of second positions (Y), the driver end has one group of third positions (Z) and one group of fourth positions (M), the first positions (X) and the third positions (Z) are located on the side wall of the main beam, and the second positions (Y) and the fourth positions (M) are located at the bottom of the main beam; The single-track and double-track beam transport vehicle further comprises a lifting device (3). In the single-track mode, the lifting device (3) comprises two groups, which are respectively installed at the second position (Y) and the fourth position (M). In the double-track mode, the lifting device (3) comprises three groups, wherein two groups of the lifting devices (3) are respectively installed at two groups of the first position (X), and another group of the lifting devices (3) is installed at the third position (Z).

4. The beam transport vehicle for single and double tracks according to claim 2, characterized in that: The vehicle frame (1) further comprises a plurality of connecting frames (16) located on two side walls of the main beam, and the plurality of double-line positions (15) are arranged in a one-to-one correspondence at the bottom of the plurality of connecting frames (16).

5. The beam transport vehicle for single and double tracks according to claim 1, characterized in that: The two columns of single-line positions (14) are arranged in a one-to-one correspondence, and the two one-to-one corresponding single-line positions (14) are arranged in a staggered manner.

6. The beam transport vehicle for single and double tracks according to claim 1, characterized in that: The vehicle also comprises a cab (4), a first connection seat (17) being installed on the side wall at one end of the vehicle frame (1), and a second connection seat (18) being installed on the front side at one end of the vehicle frame (1); in the single-line mode, the cab (4) is installed on the first connection seat (17), and in the dual-line mode, the cab (4) is installed on the second connection seat (18).

7. The beam transport vehicle for single and double tracks according to claim 3, characterized in that: The lifting device (3) comprises two supporting legs (31) detachably connected to the vehicle frame (1) and a lifting member (32) mounted on the supporting legs (31).

8. The beam transport vehicle for single and double tracks according to claim 1, characterized in that: The single-line and double-line beam transport vehicle also includes a beam carrying device (5), which includes a driving component, a first slide plate (52) and a second slide plate (53). The first slide plate (52) and the second slide plate (53) are both slidably mounted on the top of the frame (1) along the first direction. The two ends of the single-line beam or the two ends of the double-line beam are respectively placed on the first slide plate (52) and the second slide plate (53). The driving component is used to drive the first slide plate (52) to slide, so as to drive the single-line beam or the double-line beam to be transported into or out of the frame (1).

9. The beam transport vehicle for single and double tracks according to claim 8, characterized in that: The driving assembly comprises a chain (511), a sprocket and a driving member (512); the chain (511) is arranged at the top of the frame (1) along the first direction; the sprocket is engaged with the chain (511); and the driving member (512) is connected to the first slide plate (52) and is used for driving the sprocket to rotate along the chain (511) to drive the first slide plate (52) to slide.

10. The beam transport vehicle for single and double tracks according to claim 1, characterized in that: A plurality of the walking devices are arranged in groups, and each group of the walking devices is connected via a connecting rod mechanism, wherein the connecting rod mechanism comprises a steering cylinder (231) and a connecting rod (232), wherein the connecting rod (232) is rotatably connected between two adjacent walking devices, and the steering cylinder (231) drives one of the walking devices to rotate, so that the walking devices in the same group rotate synchronously via the connecting rod (232).

11. A method for switching between single and double tracks of a beam transport vehicle for use with single and double tracks as claimed in any one of claims 1 to 10, characterized in that: The following steps are involved: S1, the output end of the lifting device (3) is extended to lift the frame (1), and then the support column (6) is supported in the middle area of ​​the bottom of the frame (1), and the height of the support column (6) is the same as the height of the frame (1) lifted by the lifting device (3); S2, the output end of the lifting device (3) is retracted, a support column (6) is placed below the output end of the lifting device (3), the output end of the lifting device (3) is extended again to lift the frame (1), and a support column (6) is installed on the support column (6) in the middle area of ​​the bottom of the frame (1), and this step is repeated until the frame (1) rises to a preset height; S3, dismantling the running device connected to the single-line position (14) or the double-line position (15), and installing it to the double-line position (15) or the single-line position (14) to be switched; S4, the output end of the lifting device (3) is retracted, and the support column (6) below the output end of the lifting device (3) is removed. Then, the output end of the lifting device (3) is extended again and supported on the support column (6), and the support column (6) in the middle area of ​​the bottom of the frame (1) is removed. This step is repeated until all the support columns (6) are removed, and the single-line and double-line switching is completed.

12. The method for switching between single and double tracks of a beam transport vehicle using single and double tracks according to claim 11, characterized in that: Also includes: In the single-line mode, two sets of the lifting devices (3) are installed at the second position (Y) and the fourth position (M), and the cab (4) is installed on the first connecting seat (17) of the vehicle frame (1); In the dual-line mode, two groups of the lifting devices (3) are respectively installed at two groups of first positions (X), another group of the lifting devices (3) is installed at a third position (Z), and the cab (4) is installed on the second connecting seat (18) of the frame (1).

13. The method for switching between single and double tracks of a beam transport vehicle using single and double tracks according to claim 11, characterized in that: Also includes: In the process of switching from the dual-line mode to the single-line mode, the two sets of the lifting devices (3) installed at the two first positions (X) of the power end and the one set of the lifting devices (3) installed at the third position (Z) of the driver end are removed, and the two sets of the lifting devices (3) are installed at the second position (Y) of the power end and the fourth position (M) of the driver end; In the process of switching from the single-line mode to the dual-line mode, a group of the lifting devices (3) installed at the second position (Y) of the power end and a group of the lifting devices (3) installed at the fourth position (M) of the driver end are removed, and two groups of the lifting devices (3) are installed at the two first positions (X) of the power end, and one group of the lifting devices (3) is installed at the third position (Z) of the driver end.

14. The method for switching between single and double tracks of a beam transport vehicle using single and double tracks according to claim 11, characterized in that: The method further comprises a beam transporting step, wherein the beam transporting step comprises: The positions of the first slide plate (52) and the second slide plate (53) are adjusted by means of a beam carrying device (5) so that the distance between the center position a of the line connecting the first slide plate (52) and the second slide plate (53) and the center position b of the vehicle frame (1) meets a preset range, and then the two ends of the single-line beam or the two ends of the double-line beam are placed on the first slide plate (52) and the second slide plate (53).

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