Limiting device, steel bridge structure using the limiting device, and assembly method of the steel bridge structure

Abstract

The present invention discloses a limiting device, a steel bridge structure using the limiting device and an assembly method of the steel bridge structure, which relates to the technical field of steel bridge structures, including a limiting mechanism, the limiting mechanism including a shell, a connecting shaft, a plurality of clamping members and a connecting member, the shell having a through slot running through the two ends, and a channel running through the top of the shell, a plurality of clamping members connected to the connecting shaft, and a plurality of clamping members respectively arranged at the two ends of the shell, and a portion of the bottom end of the clamping member extending in one direction. The limiting device provided by the present invention has a relatively simple structure, and is very stable as a whole after assembly, and is adapted to the structure of the Bailey frame and the load-bearing beam, and can stably fix and connect the two, effectively avoiding the Bailey frame from being separated from the load-bearing beam during use, and the limiting device can be used to perform a standardized connection between the Bailey frame and the load-bearing beam, and the limiting device as a whole is an assembled connection, which is not only convenient for early installation, but also convenient for subsequent maintenance or replacement of parts.

Description

Technical Field

[0001] The present invention relates to the technical field of steel bridge structures, and in particular to a limiting device, a steel bridge structure using the limiting device, and an assembling method of the steel bridge structure. Background Art

[0002] Bailey bridge is the most popular type of bridge in the world, with simple structure, convenient transportation, fast erection and easy disassembly. It also has the advantages of large bearing capacity, strong structural rigidity and long fatigue life. It can be used to form temporary bridges, emergency bridges and fixed bridges of various types and uses according to different spans required by actual needs, with the characteristics of few components, light weight and low cost.

[0003] At present, when building a steel bridge structure, it is necessary to use a load-bearing beam at the bottom of the Bailey frame. At present, the connection between the Bailey frame and the load-bearing beam is usually only fixed by pouring concrete or welding. For different construction sites and construction teams, it is impossible to ensure that all such fixing methods comply with regulations. During long-term use, the Bailey frame and the load-bearing beam may fall off due to the harsh use environment, which will seriously affect the personal safety of passers-by. Summary of the invention

[0004] The main purpose of the present invention is to provide a limit device, a steel bridge structure using the limit device and an assembly method of the steel bridge structure. The limit device is simple in structure and can be used on the load-bearing beam of the steel bridge structure, which adds a connection method between the Bailey frame and the load-bearing beam, stabilizes the steel bridge structure, and improves the safety when using the Bailey frame.

[0005] The purpose of the present invention can be achieved by adopting the following technical solutions:

[0006] A limiting device includes a limiting mechanism, wherein the limiting mechanism includes a housing, a connecting shaft, a plurality of clamping members and a connecting member.

[0007] The shell has a through slot running through the two ends, and a channel runs through the top of the shell.

[0008] The connecting shaft is inserted into the inner side of the through slot.

[0009] A plurality of the clamping members are connected to the connecting shaft, and the plurality of clamping members are respectively arranged at the two ends of the shell, a portion of the bottom end of the clamping member extends in one direction, and the extended portion of the clamping member located at the end of the shell is arranged below the shell, and the extended portion of the clamping member and the shell are used to clamp the external structure to limit the vertical displacement of the shell placed on the external structure.

[0010] The connecting piece is inserted into the inner side of the channel and protrudes upwards with respect to the top of the channel. The connecting piece is connected to the connecting shaft.

[0011] Preferably, the shell includes a bottom plate, two supporting vertical plates fixed on the bottom plate and arranged opposite to each other on the left and right, and a top plate fixed on the top of the two supporting vertical plates, the channel runs through the top side surface of the top plate, and a space is left between the two supporting vertical plates to form a through groove.

[0012] Preferably, the connecting shaft is laterally inserted into the inner side of the through slot along the length direction of the through slot, and the length of the connecting shaft is greater than the length of the through slot, and the clamping member and the connecting member can be slidably connected to the connecting shaft along the length direction of the connecting shaft, and a first limit member is provided at one end of the connecting shaft for limiting the movement of the clamping member located at one end of the shell toward one end of the connecting shaft, and a second limit member is provided at the other end of the connecting shaft for limiting the movement of the clamping member located at the other end of the shell toward the other end of the connecting shaft.

[0013] Preferably, the length of the top plate is smaller than the length of the supporting vertical plate, and a portion of the end of the top plate extends downward, and the extended portion of the top plate is fixed to the inner side wall of the supporting vertical plate. A limit plate is also provided on the connecting shaft, and the limit plate is provided between the two supporting vertical plates to limit the rotation of the connecting shaft.

[0014] Preferably, the clamping member includes a connecting vertical plate and a connecting horizontal plate arranged below the connecting vertical plate, a first through-hole penetrates the side surface of the connecting vertical plate, the connecting shaft is inserted into the inner side of the first through-hole so that the clamping member can be detachably connected to the connecting shaft, the connecting horizontal plate of the clamping member at the end of the shell is arranged below the bottom plate, and a space is left between the connecting horizontal plate and the bottom plate, the space is used to accommodate an external structure, and an arc plate is connected between the connecting vertical plate and the connecting horizontal plate, which is used to set the connecting vertical plate of the clamping member located at the end of the shell in the through groove.

[0015] Preferably, the connecting member includes a connecting block and a suspension rod which are connected to each other, a second through hole is penetrated through the side of the connecting block, and the connecting shaft is inserted into the inner side of the second through hole so that the connecting member can be movably arranged on the connecting shaft, and the suspension rod is vertically arranged on the inner side of the channel and protrudes upward relative to the top of the channel.

[0016] Preferably, the limiting mechanisms are provided in plurality, and a pressure rod is detachably fixed between two adjacent limiting mechanisms, and the pressure rod is connected to the protruding portion of the connecting piece of the limiting mechanism.

[0017] A steel bridge structure with a limiting device includes a Bailey frame and a load-bearing beam distributed up and down, the limiting device is also arranged on the top of the load-bearing beam, the top of the load-bearing beam has a portion extending horizontally to one side and the other side, the limiting device includes two adjacent limiting mechanisms, the shell of the limiting mechanism is located at the top of the load-bearing beam, and the extending portion of the clamping member of the limiting mechanism is correspondingly arranged below the extending portion on one side of the load-bearing beam to limit the vertical displacement of the limiting mechanism located at the top of the load-bearing beam, the Bailey frame is arranged between the two limiting mechanisms, the limiting column is fixed on the inner bottom side of the Bailey frame, the pressure rod connected between the two limiting mechanisms is inserted into the inner side of the Bailey frame, and the pressure rod is located between the inner side wall of the Bailey frame and the limiting column, for limiting the displacement of the pressure rod along the length direction of the connecting axis of the limiting mechanism.

[0018] A method for assembling a steel bridge structure using a limit device comprises the following steps

[0019] S1. Distribute two limit mechanisms above the load-bearing beam at intervals;

[0020] S2, placing the Bailey frame between the two limit mechanisms;

[0021] S3. Place the pressure rod across the inner bottom side of the Bailey frame, and fix the two ends of the pressure rod to the two limit mechanisms respectively.

[0022] Preferably, S1 specifically includes the following

[0023] s1.1. Place the connecting block through the passage into the through groove, and vertically insert the suspension rod into the inner side of the passage, wherein the outer peripheral surface of the suspension rod is provided with a second external thread;

[0024] s1.2, a clamping member is sleeved on the connecting shaft, and the clamping member is moved to the right end of the connecting shaft, wherein the outer peripheral surface of the left end of the connecting shaft is provided with a first external thread, and the right end of the connecting shaft is fixed with a second stopper;

[0025] s1.3, insert the connecting shaft in s1.2 between the two supporting vertical plates from right to left, and in the process of inserting, insert the connecting shaft into the second through hole on the connecting block so that the connecting piece does not separate from the shell;

[0026] s1.4. Sleeve another clamping member on the connecting shaft from the left end of the connecting shaft, and screw it on the first external thread through the first limiting member, so that the clamping member does not separate from the connecting shaft. At this point, a limiting mechanism is installed, and the first limiting member is a nut;

[0027] s1.5. Repeat steps s1.1 to s1.4 to install another limit mechanism;

[0028] s1.6. Distribute the two assembled limit mechanisms above the load-bearing beam at intervals, so that the extended portion of the load-bearing beam is inserted into the space between the connecting cross plate and the bottom plate. At this time, the limit mechanism is limited in the vertical direction;

[0029] S2 specifically includes the following

[0030] s2.1. Lift the Bailey frame and place it between the two limit mechanisms;

[0031] s2.2. Adjust the position of the Bailey frame so that the space between the inner side wall of the Bailey frame and the limiting column on the inner bottom side thereof intersects with the space between the connecting pieces on the two limiting mechanisms;

[0032] S3 specifically includes the following

[0033] s3.1. Place the compression rod across the space between the inner side wall of the Bailey frame and the limit column on its inner bottom side;

[0034] s3.2. The end of the pressure rod is fixed to the connecting piece of the corresponding limiting mechanism through the third limiting piece, and the third limiting piece is a nut.

[0035] Beneficial technical effects of the present invention:

[0036] 1. The limiting mechanism provided by the present invention has a relatively simple structure and is very stable as a whole after assembly. It is adapted to the structure of the Bailey frame and the load-bearing beam, and can stably fix the two together, effectively preventing the Bailey frame from being separated from the load-bearing beam during use. The Bailey frame and the load-bearing beam can be connected in a standardized manner through the limiting device, and the limiting device is an assembled connection as a whole, which is not only convenient for early installation, but also convenient for subsequent maintenance or replacement of parts, thereby extending the service life of the limiting device. The assembled limiting device is tough and firm, flexible in assembly, can be used repeatedly, is convenient for maintenance or replacement of spare parts, and realizes scientific and economical operability.

[0037] 2. The limiting mechanism provided by the present invention is easy to operate and can be used on both top-bearing bridges and bottom-bearing bridges. It maintains the stable and fixed contact between the Bailey frame and the load-bearing beam and has the characteristics of interchangeability.

[0038] 3. The limiting device provided by the present invention mainly fixes the load-bearing beam and the Bailey frame above it, so that the Bailey frame cannot be displaced left and right, and is restricted up and down, and the Bailey frame is locked in position, so that the Bailey bridge above the load-bearing beam can be kept in a safe, stable and fixed state for a long time during use.

[0039] 4. The steel bridge structure with the limiting device provided by the present invention has high stability, which can ensure that the Bailey frame will not be separated from the load-bearing beam during long-term use, thereby extending the service life of the steel bridge structure. In addition, the overall assembly of the steel bridge structure using the limiting device is convenient. During the assembly process, no welding and cutting processes are required, which prevents damage to the steel bridge structure during welding and cutting processes and protects the applicability of the special material of the Bailey steel bridge.

[0040] 5. The assembly method of the steel bridge structure provided by the present invention is simple and quick to operate, and the assembled steel bridge structure has high stability. The assembly process does not require the use of too many tools and does not have too many requirements on the installation environment. It can be assembled in a relatively narrow environment.

[0041] 6. The clamping piece provided by the present invention is used in conjunction with the connecting shaft to effectively fix the shell on the load-bearing beam, and the clamping piece is movable and adjustable on the connecting shaft to facilitate adapting to load-bearing beams of different widths. The setting of the arc plate allows the connecting vertical plate to be placed on the bottom plate of the shell, further enhancing the overall stability of the assembled limiter. In addition, the connecting piece is movable relative to the connecting shaft, which is convenient for adjusting its own position according to the wall thickness of the Bailey frame. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] Figure 1 is a schematic diagram of the three-dimensional structure of a limiting mechanism according to an embodiment of the present invention;

[0043] Figure 2 is a schematic diagram of a top view of the limiting mechanism according to an embodiment of the present invention;

[0044] Figure 3 is a schematic diagram of a three-dimensional structure of a clamping member according to an embodiment of the present invention;

[0045] Figure 4 It is a front view structural schematic diagram of a connecting member according to an embodiment of the present invention;

[0046] Figure 5 is a schematic diagram of a three-dimensional structure of a connecting piece according to an embodiment of the present invention;

[0047] Figure 6 is a schematic diagram of a top view of the structure of a limiting device according to an embodiment of the present invention;

[0048] Figure 7 It is a three-dimensional schematic diagram of a steel bridge structure equipped with a limiting device according to an embodiment of the present invention;

[0049] Figure 8 It is a front view schematic diagram of a steel bridge structure equipped with a limiting device according to an embodiment of the present invention.

[0050] In the figure: 1-shell, 101-support vertical plate, 102-bottom plate, 103-top plate, 4-channel, 5-connecting shaft, 6-clamping member, 601-connecting vertical plate, 602-arc plate, 603-connecting horizontal plate, 701-first limiting member, 702-second limiting member, 8-limiting plate, 10-first through hole, 11-connecting member, 1101-suspender rod, 1102-connecting block, 12-second through hole, 13-pressure rod, 1401-first external thread, 1402-second external thread, 15-third limiting member, 16-load-bearing beam, 17-Bailey frame, 18-limiting column. DETAILED DESCRIPTION

[0051] In order to make the technical solution of the present invention more clear and specific to those skilled in the art, the present invention is further described in detail below in conjunction with embodiments and drawings, but the implementation manner of the present invention is not limited thereto.

[0052] like Figure 1-Figure 6 As shown, the limiting device provided in this embodiment includes a limiting mechanism for limiting the Bailey frame on the load-bearing beam, and the limiting mechanism includes a housing 1 for being placed on the load-bearing beam of the steel bridge structure, a connecting shaft 5, two clamping members 6 and a connecting member 11.

[0053] The shell 1 has a through slot running through the two ends, and a channel 4 runs through the top of the shell 1. The length of the channel 4 is less than the length of the top of the shell 1.

[0054] The connecting shaft 5 is inserted into the inner side of the through groove, and the cross-sectional area of ​​the through groove is much larger than the cross-sectional area of ​​the connecting shaft 5, so that the connecting shaft 5 can be inserted conveniently.

[0055] Two clamping members 6 are connected to the connecting shaft 5, and the two clamping members 6 are respectively arranged at the two ends of the shell 1, and the bottom end of the clamping member 6 extends a part in one direction, and the extended part of the clamping member 6 located at the end of the shell 1 is arranged below the shell 1, and the extended part of the clamping member 6 and the shell 1 are used to clamp the load-bearing beam to limit the vertical displacement of the shell 1 placed on the load-bearing beam.

[0056] The connecting member 11 is inserted into the inner side of the channel 4 and protrudes upwards relative to the top of the channel 4 . The connecting member 11 is connected to the connecting shaft 5 .

[0057] In this embodiment, if Figure 1 As shown, the shell 1 includes a bottom plate 102, two supporting vertical plates 101 fixed on the bottom plate 102 and arranged opposite to each other on the left and right, and a top plate 103 fixed on the top of the two supporting vertical plates 101. The channel 4 passes through the top side surface of the top plate 103. A space is left between the two supporting vertical plates 101 to form a through groove. The shell 1 can be regarded as a hollow rectangular structure with open ends.

[0058] In this embodiment, if Figure 1 and Figure 2 As shown, the connecting shaft 5 is laterally inserted into the inner side of the through groove along the length direction of the through groove. The connecting shaft 5 is a cylindrical structure, and the length of the connecting shaft 5 is greater than the length of the through groove. To ensure that the end of the connecting shaft 5 can protrude from the end of the shell 1, the clamping member 6 and the connecting member 11 can be connected to the connecting shaft 5 movably along the length direction of the connecting shaft 5, so as to facilitate the installation of the clamping member 6 and the connecting member 11 and adjust the position of the connecting member 11. A first limit member 701 is provided at one end of the connecting shaft 5 for limiting the movement of the clamping member 6 located at one end of the shell 1 toward one end of the connecting shaft 5. An external thread is provided on the outer peripheral surface of one end of the connecting shaft 5. The first limit member 701 can be a nut. A second limit member 702 is fixed to the other end of the connecting shaft 5, which is a plate-like structure for limiting the movement of the clamping member 6 located at the other end of the shell 1 toward the other end of the connecting shaft 5.

[0059] In this embodiment, if Figure 1 and Figure 2 As shown, the length of the top plate 103 is smaller than the length of the supporting vertical plate 101, and a portion of the end of the top plate 103 extends downward, and the extended portion of the top plate 103 is fixed to the inner wall of the supporting vertical plate 101. A limiting plate 8 is also provided on the connecting shaft 5, and the limiting plate 8 is provided between the two supporting vertical plates 101. The width of the limiting plate 8 is slightly smaller than the width of the through groove, and is used to limit the rotation of the connecting shaft 5.

[0060] In this embodiment, if Figure 3 and Figure 6 As shown, the clamping member 6 includes a connecting vertical plate 601 and a connecting horizontal plate 603 arranged below the connecting vertical plate 601, and the connecting horizontal plate 603 is an extension of the clamping member 6. The side of the connecting vertical plate 601 is penetrated by a first through hole 10, and the connecting shaft 5 is inserted into the inner side of the first through hole 10, so that the clamping member 6 can be detachably connected to the connecting shaft 5, which is convenient for assembly. The connecting horizontal plate 603 of the clamping member 6 at the end of the shell 1 is arranged below the bottom plate 102, and a space is left between the connecting horizontal plate 603 and the bottom plate 102, and the space is used to accommodate the load-bearing beam. An arc plate 602 is connected between the connecting vertical plate 601 and the connecting horizontal plate 603, which is used to make the connecting vertical plate 601 of the clamping member 6 located at the end of the shell 1 be arranged in the through groove, that is, the connecting vertical plate 601 is placed on the bottom plate 102, thereby improving the overall stability of the limiting mechanism.

[0061] In this embodiment, if Figure 4 and Figure 6As shown, the connecting member 11 includes a connecting block 1102 and a suspension rod 1101 which are interconnected. The thickness of the connecting block 1102 is smaller than that of the channel 4, but the width is larger than that of the channel 4. A second through hole 12 passes through the side of the connecting block 1102. The connecting shaft 5 is inserted into the inner side of the second through hole 12 so that the connecting member 11 can be movably set on the connecting shaft 5 and limit the position of the connecting member 11. The suspension rod 1101 is vertically set on the inner side of the channel 4 and protrudes upward relative to the top of the channel 4.

[0062] In this embodiment, if Figure 6 As shown, there are two limiting mechanisms, and a pressure rod 13 is detachably fixed between two adjacent limiting mechanisms. The pressure rod 13 is connected to the protruding part of the connecting member 11 of the limiting mechanism. The protruding part is provided with an external thread, and a nut can be screwed on. The pressure rod 13 is fixed by the cooperation between the threaded nut, which facilitates the assembly of the pressure rod 13.

[0063] A steel bridge structure with a limiting device includes a Bailey frame 17 and a load-bearing beam 16 distributed up and down, and a limiting device is also arranged on the top of the load-bearing beam 16.

[0064] The top of the load-bearing beam 16 has a portion extending horizontally to one side and the other side, that is, the load-bearing beam 16 is an I-shaped structure, and has two wing plates on the top, and one wing plate is equipped with two connecting cross plates 603.

[0065] The limiting device includes two adjacent limiting mechanisms.

[0066] The housing 1 of the limiting mechanism is located at the top of the load-bearing beam 16, and the extension portion of the clamping member 6 of the limiting mechanism is correspondingly arranged below the extension portion on one side of the load-bearing beam 16 to limit the vertical displacement of the limiting mechanism located at the top of the load-bearing beam 16.

[0067] The Bailey frame 17 is arranged between the two limiting mechanisms, and the limiting column 18 is fixed on the inner bottom side of the Bailey frame 17.

[0068] The pressure rod 13 connected between the two limiting mechanisms is inserted into the inner side of the Bailey frame 17, and the pressure rod 13 is located between the inner side wall of the Bailey frame 17 and the limiting column 18, which is used to limit the displacement of the pressure rod 13 along the length direction of the connecting shaft 5 of the limiting mechanism.

[0069] The top side of the limiting column 18 is higher than the bottom side of the pressing rod 13.

[0070] This steel bridge structure is highly stable, and the limiting device is an assembled structure as a whole, which is not only convenient for early assembly, but also convenient for subsequent maintenance or replacement of parts.

[0071] A method for assembling a steel bridge structure using a limit device comprises the following steps

[0072] S1, distributing two limit mechanisms at intervals above the load-bearing beam 16;

[0073] S2, placing the Bailey frame 17 between the two limit mechanisms;

[0074] S3, the pressure rod 13 is placed across the inner bottom side of the Bailey frame 17, and the two ends of the pressure rod 13 are fixed to the two limit mechanisms respectively.

[0075] In this embodiment, if Figure 7 and Figure 8 , S1 specifically includes the following

[0076] s1.1. Place the connecting block 1102 inside the through groove through the channel 4, and vertically insert the suspension rod 1101 into the inner side of the channel 4, wherein the outer peripheral surface of the suspension rod 1101 is provided with a second external thread 1402;

[0077] s1.2. A clamping member 6 is sleeved on the connecting shaft 5, and the clamping member 6 is moved to the right end of the connecting shaft 5, wherein the outer peripheral surface of the left end of the connecting shaft 5 is provided with a first external thread 1401, and the right end of the connecting shaft 5 is fixed with a second stopper 702;

[0078] s1.3, insert the connecting shaft 5 in s1.2 from right to left between the two supporting vertical plates 101, and in the process of inserting, insert the connecting shaft 5 into the second through hole 12 on the connecting block 1102, so that the connecting member 11 does not separate from the housing 1;

[0079] s1.4. Put another clamping member 6 on the connecting shaft 5 from the left end thereof, and screw it on the first external thread 1401 through the first stopper 701, so that the clamping member 6 does not separate from the connecting shaft 5. Thus, a stopper mechanism is installed, and the first stopper 701 is a nut.

[0080] s1.5. Repeat steps s1.1 to s1.4 to install another limit mechanism;

[0081] s1.6, the two assembled limiting mechanisms are spaced apart above the load-bearing beam 16, so that the extended portion of the load-bearing beam 16 is inserted into the space between the connecting cross plate 603 and the bottom plate 102, and the limiting mechanism is limited in the vertical direction at this time;

[0082] S2 specifically includes the following

[0083] s2.1. Lift the Bailey frame 17 and place it between the two limit mechanisms;

[0084] s2.2. Adjust the position of the Bailey frame 17 so that the space between the inner side wall of the Bailey frame 17 and the limiting column 18 on the inner bottom side thereof intersects with the space between the connecting members 11 on the two limiting mechanisms;

[0085] S3 specifically includes the following

[0086] s3.1. Place the compression rod 13 across the space between the inner side wall of the Bailey frame 17 and the limiting column 18 on the inner bottom side thereof;

[0087] s3.2. The end of the pressure rod 13 is fixed to the connecting member 11 of the corresponding limiting mechanism through the third limiting member 15, and the third limiting member 15 is a nut.

[0088] To sum up, in this embodiment, the limiting device provided in this embodiment has a relatively simple structure, and is very stable as a whole after assembly. It adapts to the structure of the Bailey frame and the load-bearing beam, and can stably fix the two together, effectively preventing the Bailey frame from being separated from the load-bearing beam during use. The limiting device can be used to perform a standardized connection between the Bailey frame and the load-bearing beam, and the limiting device is an assembled connection as a whole, which is not only convenient for the initial installation, but also convenient for subsequent maintenance or replacement of parts, thereby extending the service life of the limiting device. It only needs to be simply assembled for the limiting mechanism before it can be used, and the overall structure after assembly is stable and not easy to fall off or be damaged.

[0089] The above description is only a further embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and concepts of the present invention within the scope disclosed by the present invention, which belong to the protection scope of the present invention.

Claims

1. A steel bridge structure using a limiting device, the limiting device comprising a limiting mechanism, the limiting mechanism comprising a housing (1), a connecting shaft (5), a plurality of clamping members (6) and a connecting member (11), The shell (1) has a through groove extending between the two ends, and a channel (4) extends through the top of the shell (1). The connecting shaft (5) is inserted into the inner side of the through groove. A plurality of the clamping members (6) are connected to the connecting shaft (5), and the plurality of the clamping members (6) are respectively arranged at two ends of the shell (1), a portion of the bottom end of the clamping member (6) extends in one direction, and the extended portion of the clamping member (6) located at the end of the shell (1) is arranged below the shell (1), and the extended portion of the clamping member (6) and the shell (1) are used to clamp the external structure to limit the vertical displacement of the shell (1) placed on the external structure. The connecting member (11) is inserted into the inner side of the channel (4) and protrudes upwards with respect to the top of the channel (4); the connecting member (11) is connected to the connecting shaft (5); The housing (1) comprises a bottom plate (102), two supporting vertical plates (101) fixed on the bottom plate (102) and arranged opposite to each other on the left and right, and a top plate (103) fixed on the tops of the two supporting vertical plates (101), the channel (4) passes through the top side surface of the top plate (103), and a space is left between the two supporting vertical plates (101) to form a through groove; The connecting shaft (5) is inserted into the inner side of the through slot transversely along the length direction of the through slot, and the length of the connecting shaft (5) is greater than the length of the through slot. Both the clamping member (6) and the connecting member (11) can be connected to the connecting shaft (5) slidably along the length direction of the connecting shaft (5). A first limiting member (701) is provided at one end of the connecting shaft (5) for limiting the movement of the clamping member (6) at one end of the housing (1) toward one end of the connecting shaft (5). A second limiting member (702) is provided at the other end of the connecting shaft (5) for limiting the movement of the clamping member (6) at the other end of the housing (1) toward the other end of the connecting shaft (5). The length of the top plate (103) is smaller than the length of the supporting vertical plate (101), and a portion of the end of the top plate (103) extends downward, and the extended portion of the top plate (103) is fixed to the inner side wall of the supporting vertical plate (101). A limiting plate (8) is also provided on the connecting shaft (5), and the limiting plate (8) is provided between the two supporting vertical plates (101) to limit the rotation of the connecting shaft (5); The clamping member (6) comprises a connecting vertical plate (601) and a connecting horizontal plate (603) arranged below the connecting vertical plate (601); a first through hole (10) is passed through the side surface of the connecting vertical plate (601); the connecting shaft (5) is inserted into the inner side of the first through hole (10) so that the clamping member (6) can be detachably connected to the connecting shaft (5); the connecting horizontal plate (603) of the clamping member (6) at the end of the shell (1) is arranged below the bottom plate (102); and a space is left between the connecting horizontal plate (603) and the bottom plate (102), the space being used to accommodate an external structure; an arc plate (602) is connected between the connecting vertical plate (601) and the connecting horizontal plate (603) so that the connecting vertical plate (601) of the clamping member (6) at the end of the shell (1) is arranged in the through groove; The connecting member (11) comprises a connecting block (1102) and a suspension rod (1101) which are connected to each other. A second through hole (12) is penetrated through the side surface of the connecting block (1102). The connecting shaft (5) is inserted into the inner side of the second through hole (12) so that the connecting member (11) can be movably arranged on the connecting shaft (5). The suspension rod (1101) is vertically arranged on the inner side of the channel (4) and protrudes upwards relative to the top of the channel (4). There are multiple limit mechanisms, and a pressure rod (13) is detachably fixed between two adjacent limit mechanisms, and the pressure rod (13) is connected to the protruding portion of the connecting piece (11) of the limit mechanism; Features: The steel bridge structure comprises a Bailey frame (17) and a load-bearing beam (16) distributed vertically, the top of the load-bearing beam (16) is also provided with the limiting device, the top of the load-bearing beam (16) has a portion extending horizontally to one side and the other side, the limiting device comprises two adjacent limiting mechanisms, the housing (1) of the limiting mechanism is located at the top of the load-bearing beam (16), and the extending portion of the clamping member (6) of the limiting mechanism is correspondingly arranged below the extending portion on one side of the load-bearing beam (16). The Bailey frame (17) is provided between two of the limit mechanisms, a limit column (18) is fixed to the inner bottom side of the Bailey frame (17), a pressure rod (13) connected between the two limit mechanisms is inserted into the inner side of the Bailey frame (17), and the pressure rod (13) is located between the inner side wall of the Bailey frame (17) and the limit column (18), so as to limit the displacement of the pressure rod (13) along the length direction of the connecting shaft (5) of the limit mechanism.

2. The method for assembling a steel bridge structure using a limit device according to claim 1, characterized in that: The following steps are included S1, distributing two limit mechanisms at intervals above the load-bearing beam (16); S2, placing the Bailey frame (17) between the two limit mechanisms; S3, the pressure rod (13) is placed across the inner bottom side of the Bailey frame (17), and the two ends of the pressure rod (13) are respectively fixed to the two limit mechanisms.

3. The method for assembling a steel bridge structure using a limit device according to claim 2, characterized in that: S1 specifically includes the following s1.

1. Place the connecting block (1102) through the channel (4) and place it inside the through groove, and vertically insert the suspension rod (1101) into the inner side of the channel (4), wherein the outer peripheral surface of the suspension rod (1101) is provided with a second external thread (1402); s1.

2. A clamping member (6) is sleeved on the connecting shaft (5), and the clamping member (6) is moved to the right end of the connecting shaft (5), wherein a first external thread (1401) is formed on the outer peripheral surface of the left end of the connecting shaft (5), and a second stopper (702) is fixed to the right end of the connecting shaft (5); s1.3, inserting the connecting shaft (5) in s1.2 from right to left between the two supporting vertical plates (101), and during the insertion process, inserting the connecting shaft (5) into the second through hole (12) on the connecting block (1102), so that the connecting member (11) does not separate from the housing (1); s1.

4. Sleeve another clamping member (6) on the connecting shaft (5) from the left end portion of the connecting shaft (5), and screw it onto the first external thread (1401) through the first limiting member (701) so that the clamping member (6) does not separate from the connecting shaft (5). Thus, a limiting mechanism is installed, and the first limiting member (701) is a nut; s1.

5. Repeat steps s1.1 to s1.4 to install another limit mechanism; s1.

6. The two assembled limiting mechanisms are spaced apart above the load-bearing beam (16) so that the extended portion of the load-bearing beam (16) is inserted into the space between the connecting cross plate (603) and the bottom plate (102). At this time, the limiting mechanism is limited in the vertical direction; S2 specifically includes the following s2.

1. Lift the Bailey frame (17) and place it between the two limit mechanisms; s2.2, adjusting the position of the Bailey frame (17) so that the space between the inner side wall of the Bailey frame (17) and the limiting column (18) on the inner bottom side thereof intersects with the space between the connecting members (11) on the two limiting mechanisms; S3 specifically includes the following s3.

1. Place the pressure rod (13) across the space between the inner side wall of the Bailey frame (17) and the limit column (18) on the inner bottom side thereof; s3.

2. The end of the pressure rod (13) is fixed to the connecting member (11) of the corresponding limiting mechanism through the third limiting member (15), and the third limiting member (15) is a nut.

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