A steel part positioning device for a bridge steel structure

Abstract

The present application relates to a kind of steel piece positioning device of bridge steel structure, to solve the current steel expansion joint device through the installation precision of suspension way of suspension crane is low, leading to the problem of slow installation efficiency, including link mechanism, clamp, steel expansion joint device, lateral positioning mechanism, horizontal positioning mechanism and auxiliary mechanism, link mechanism, wherein, the link mechanism is assembly structure, at least one clamp is arranged in the bottom of the link mechanism by hydraulic lifting cylinder, steel expansion joint device is arranged on the clamp, two lateral positioning mechanisms are arranged in the end of the link mechanism.The present application moves positioning movement to steel expansion joint device by the cooperation of link mechanism, lateral positioning mechanism, horizontal positioning mechanism and clamp X, Y, Z axis, to effectively improve the efficient installation process of steel structure bridge for steel expansion joint device, effectively improve the problem that installation precision is low by suspension way of suspension crane, leading to slow installation efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of bridge steel structure installation, and particularly relates to a steel piece positioning device for bridge steel structure. BACKGROUND

[0002] Steel structure bridges are applied more and more in modern bridge construction, and the strength and toughness of the whole bridge are improved through steel fittings. In other words, the connection between steel fittings and concrete is reasonably matched to improve construction efficiency and further improve bridge quality. In the bridge construction process, effective deformation space is provided between prefabricated steel structure bridge sections, and a steel expansion joint device is installed between the prefabricated steel structure bridge sections and the road and bridge to provide the required movement space for the expansion and contraction of the bridge body.

[0003] The existing steel expansion joint device has the following requirements based on the road and bridge construction standards: 1. The axial center point of the steel expansion joint device needs to be on the same longitudinal axis as the bridge installation cavity; 2. The lateral center point of the steel expansion joint device needs to be on the same longitudinal axis as the bridge installation cavity; and 3. The top surface of the steel expansion joint device needs to be at the same elevation as the bridge road surface.

[0004] The existing installation of the steel expansion joint device in the steel structure bridge is mostly carried out by a crane, and manual adjustment and installation are required. The manual installation is low in efficiency and needs to be repeatedly adjusted. In addition, the stability of the steel expansion joint device during the suspension and adjustment process by the crane is low, which leads to poor installation precision. Therefore, we propose a steel piece positioning device for bridge steel structure. SUMMARY

[0005] The present application aims to overcome the shortcomings of the prior art and adapt to the actual needs by providing a steel piece positioning device for bridge steel structure to solve the problem of low installation precision of the steel expansion joint device by the suspension crane, which leads to slow installation efficiency.

[0006] In order to achieve the purpose of the present application, the technical solution adopted by the present application is as follows: a steel piece positioning device for bridge steel structure is designed, which comprises a continuous frame mechanism, a clamp, a steel expansion joint device, a lateral positioning mechanism, a horizontal positioning mechanism and an auxiliary mechanism.

[0007] The connecting frame mechanism is a assembled structure, at least one clamp is arranged at the bottom of the connecting frame mechanism through a hydraulic lifting cylinder, a steel expansion joint device is arranged on the clamp, two lateral positioning mechanisms are arranged at the ends of the connecting frame mechanism, two horizontal positioning mechanisms are arranged on the lateral positioning mechanisms, and two auxiliary mechanisms are arranged on the two sides of the horizontal positioning mechanisms, wherein the connecting frame mechanism, the clamp, the lateral positioning mechanism and the horizontal positioning mechanism drive the X, Y and Z axis movement of the steel expansion joint device. The X, Y and Z axis movement positioning movement of the steel expansion joint device is realized through the cooperation of the connecting frame mechanism, the lateral positioning mechanism, the horizontal positioning mechanism and the clamp, so that the efficient installation process of the steel expansion joint device on the steel structure bridge is effectively improved, and the problem of low installation precision caused by the suspension installation by the suspension machine is solved.

[0008] Preferably, the connecting frame mechanism comprises a main frame body, a movable rod and a hydraulic transverse cylinder.

[0009] The main frame body is arranged above the steel expansion joint device, the movable rod is sleeved at the end of the main frame body, the main frame body is movably connected with the movable rod, and the hydraulic transverse cylinder is arranged at the end of the main frame body through a swivel base A and connected with the movable rod. Through the movable connection of the main frame body and the movable rod, the synchronous bidirectional distance movement is realized through the cooperation of the hydraulic transverse cylinder, and the overall centering and calibration of the steel piece positioning device is realized through the installation slot under the assistance of the two horizontal positioning mechanisms and the auxiliary mechanisms.

[0010] Preferably, the lateral positioning mechanism comprises a mounting platform, an engaging rack, a clamping frame and a hydraulic lateral cylinder.

[0011] The mounting platform is fixedly arranged at the end of the movable rod, and an installation cavity is formed in the internal gap of the mounting platform, and a sliding groove is formed in the two sides of the installation cavity. Two engaging racks are arranged in the installation cavity, wherein the two engaging racks are connected through a gear to form an equidistant linkage structure, a plurality of rollers matched with the sliding groove are arranged on the two sides of the engaging rack, a clamping frame is arranged at the bottom of the engaging rack through bolts, and a hydraulic lateral cylinder is arranged between the two clamping frames through a swivel base B. The stroke work of the hydraulic lateral cylinder is used to relatively expand the two groups of clamping frames and engaging racks, and the equidistant movement of the two engaging racks is realized through the cooperation of the gear, and the overall centering and calibration of the steel piece positioning device is realized through the installation slot.

[0012] Preferably, the horizontal positioning mechanism comprises a connecting rod, a positioning shaft and a limiting groove.

[0013] The connecting rod is arranged inside the clamping frame; at least one positioning shaft rod is arranged on the connecting rod, a limiting groove is arranged on the connecting rod, and the connecting rod is rotationally connected with the positioning shaft rod. The limiting groove is horizontally arranged, and the positioning shaft rod is vertically arranged with the mounting platform. The hydraulic lifting cylinder is used for lifting the clamp of the steel expansion joint device, so that the steel expansion joint device is in contact with the bottom of one end of the positioning shaft rod, and the auxiliary mechanism is used for lifting adjustment, so that the positioning shaft rod is horizontally arranged with the edge of the mounting groove, so that the steel expansion joint device is in the same height with the mounting groove, and the limiting groove and the middle end of the connecting rod are used for limiting the rotation angle, so that the error of the positioning shaft rod is effectively avoided.

[0014] Preferably, the auxiliary mechanism comprises lifting limiting frames, adjusting cylinders, auxiliary frames, lifting cylinders, drive wheel groups, traction rods and auxiliary wheels.

[0015] The two lifting limiting frames are arranged on the two sides of the mounting platform, the limiting adjusting grooves are arranged in the lifting limiting frames, the limiting adjusting grooves are matched with the protruding end portions of the mounting platform, the limiting adjusting grooves are movably connected with the mounting platform, the two adjusting cylinders are arranged in the lifting limiting frames and connected with the bottom of the mounting platform, the auxiliary frames are arranged on one side of the lifting limiting frames, the lifting cylinders are arranged on the auxiliary frames through the swivel base C, the drive wheel groups are arranged on the telescopic ends of the lifting cylinders through the swivel base D, the drive wheel groups are arranged with the traction rods hinged to the auxiliary frames, and the auxiliary wheels are arranged in the auxiliary frames. The traction rod, the drive wheel group and the auxiliary frame are hinged to cooperate with the lifting cylinder, so that the drive wheel group can be folded and adjusted in a short distance, and the limiting adjusting groove and the mounting platform are movably connected and the adjusting cylinder is arranged, so that the steel expansion joint device can be clamped and the steel expansion joint device in the mounting groove can be lifted and adjusted.

[0016] A method for using a steel piece positioning device of a bridge steel structure, comprising the following steps:

[0017] S100, measurement processing: measuring and marking the installation groove required for the installation of the steel expansion joint device at the cement pavement at both ends of the prefabricated steel structure bridge section by using a measuring tool;

[0018] S200, cutting processing: cutting work is performed on the marked line by using a cutting tool;

[0019] S300, cleaning processing: the cement blocks are damaged and cleaned by using artificial and damaged devices;

[0020] S400, pre-burying processing: the reinforcing steel bar frame is fixed in the installation groove by using cement by artificial;

[0021] S500, positioning and installing: first, the steel piece positioning device is installed by manual operation and connected with the tail end traction frame of the driving vehicle, then the hydraulic drive device is connected with the hydraulic assembly of the steel piece positioning device, the clamp is used to clamp the steel expansion joint device and move to the installation slot, first, the main frame body is movably connected with the movable rod, and the hydraulic lateral cylinder is used for synchronous bidirectional distance moving, the steel expansion joint device is horizontally centered and displaced in the installation slot under the limitation of the installation slot which needs to be cut and opened on the steel structure bridge, then the hydraulic lateral cylinder is returned, then the driving wheel group is preliminarily lowered by the lifting cylinder, then the clamp is raised under the return work of the hydraulic lifting cylinder, at this time, the steel expansion joint device is in contact with the bottom of one end of the positioning shaft rod, the auxiliary mechanism is used for lifting adjustment to make the whole positioning shaft rod keep horizontal with the edge of the installation slot, so that the steel expansion joint device is kept in the same height with the installation slot, then the two sets of clamping frames and the meshing racks are relatively expanded by the stroke work of the hydraulic lateral cylinder, and the two meshing racks are moved at equal distances by the gear, the whole steel piece positioning device is centered and calibrated in the installation slot, and the adjusting cylinder is set to be used for secondary short-range lifting adjustment, so that the steel expansion joint device in the installation slot is lowered and adjusted, and the other end of the positioning shaft rod keeps horizontal with the edge of the installation slot.

[0022] S600, welding and fixing treatment, the steel reinforcement frame is welded with the steel reinforcement bar at the bottom of the steel expansion joint device by manual operation, and the installation slot gap is filled with cement.

[0023] Compared with the prior art, the beneficial effects of the present application are that:

[0024] 1. The steel expansion joint device is moved, centered and positioned in X, Y and Z axes by the clamps cooperating with the continuous mechanism, the lateral positioning mechanism and the horizontal positioning mechanism, so that the installation process of the steel structure bridge on the steel expansion joint device is effectively improved, and the problem of low installation precision and slow installation efficiency caused by the suspension method of the suspension machine is effectively solved.

[0025] 2. The main frame body is movably connected with the movable rod, and the hydraulic lateral cylinder is used for synchronous bidirectional distance moving, the two horizontal positioning mechanisms and the auxiliary mechanism are used for assisting, and the whole steel piece positioning device is centered and calibrated in the installation slot.

[0026] 3. The two sets of clamping frames and the meshing racks are relatively expanded by the stroke work of the hydraulic lateral cylinder, and the two meshing racks are moved at equal distances by the gear, and the whole steel piece positioning device is centered and calibrated in the installation slot.

[0027] 4. The present application lifts the clamp of the steel expansion joint device by the hydraulic lifting cylinder, so that the steel expansion joint device contacts the bottom of the one end of the positioning shaft, cooperates with the auxiliary mechanism to adjust the lifting to make the positioning shaft keep horizontal with the edge of the installation groove, so that the steel expansion joint device is in the same height with the installation groove, and the rotation angle is limited by the limiting groove and the middle end of the connecting rod, so that the error of the positioning shaft is effectively avoided. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 It is the overall schematic diagram of the three-dimensional structure of the present application;

[0029] Figure 2 It is the schematic diagram of the clamping of the contraction joint device of the present application;

[0030] Figure 3 It is the schematic diagram of the three-dimensional structure of the auxiliary mechanism of the present application;

[0031] Figure 4 It is the schematic diagram of the installation structure of the lateral positioning mechanism of the present application;

[0032] Figure 5 It is the schematic diagram of the Figure 1 It is the schematic diagram of the local enlarged structure at A of the present application;

[0033] Figure 6 It is the schematic diagram of the horizontal positioning mechanism structure of the present application.

[0034] In the figure: 1, connecting mechanism; 2, clamp; 3, contraction joint device; 4, lateral positioning mechanism; 5, horizontal positioning mechanism; 6, auxiliary mechanism; 101, main frame body; 102, movable rod; 103, hydraulic transverse cylinder; 401, installation platform; 402, meshing rack; 403, clamping frame; 404, hydraulic lateral cylinder; 501, connecting rod; 502, positioning shaft; 503, limiting groove; 601, lifting limiting frame; 602, adjusting cylinder; 603, auxiliary frame; 604, lifting cylinder; 605, driving wheel set; 606, traction rod; 607, auxiliary wheel. DETAILED DESCRIPTION

[0035] The present application is further illustrated below in combination with the drawings and examples:

[0036] A steel piece positioning device of a bridge steel structure, referring to Figures 1 to 6 , comprising a connecting mechanism 1, a clamp 2, a steel expansion joint device 3, a lateral positioning mechanism 4, a horizontal positioning mechanism 5 and an auxiliary mechanism 6;

[0037] Wherein, the connecting frame mechanism 1, wherein the connecting frame mechanism 1 is an assembled structure, at least one clamp 2 is arranged at the bottom of the connecting frame mechanism 1 through a hydraulic lifting cylinder, the steel expansion joint device 3 is arranged on the clamp 2, two lateral positioning mechanisms 4 are arranged at the ends of the connecting frame mechanism 1, two horizontal positioning mechanisms 5 are arranged on the lateral positioning mechanisms 4, and two auxiliary mechanisms 6 are arranged on both sides of the horizontal positioning mechanisms 5, wherein the connecting frame mechanism 1, the clamp 2, the lateral positioning mechanism 4 and the horizontal positioning mechanism 5 drive the steel expansion joint device 3 to move in X, Y and Z axes. The present application moves the steel expansion joint device 3 in X, Y and Z axes through the cooperation of the connecting frame mechanism 1, the lateral positioning mechanism 4, the horizontal positioning mechanism 5 and the clamp 2, so as to effectively improve the efficient installation process of the steel structure bridge for the steel expansion joint device 3, and effectively improve the low installation precision of the suspension machine suspension mode, thereby solving the problem of slow installation efficiency.

[0038] An embodiment is shown as Figure 1 And Figure 2 For the convenience of understanding how the connecting frame mechanism 1 is adjusted in the lateral center positioning, the present application further discloses a more specific embodiment of the connecting frame mechanism 1, which comprises a main frame body 101,

[0039] A movable rod 102 and a hydraulic lateral cylinder 103;

[0040] Wherein, the main frame body 101 is arranged above the steel expansion joint device 3, the movable rod 102 is sleeved on the end of the main frame body 101, wherein the main frame body 101 is movably connected with the movable rod 102, and the hydraulic lateral cylinder 103 is arranged on the end of the main frame body 101 through a swivel base A and connected with the movable rod 102. The present application is movably connected with the movable rod 102, cooperates with the hydraulic lateral cylinder 103 to synchronously move in both directions with a fixed distance, and is assisted by the two horizontal positioning mechanisms 5 and the auxiliary mechanisms 6 under the limitation of the installation groove required for cutting and chiseling of the steel structure bridge, so as to rely on the installation groove to make the whole steel piece positioning device to be centrally calibrated.

[0041] An embodiment is shown as Figure 2 And Figure 5 For the convenience of understanding how the lateral positioning mechanism 4 is adjusted in the lateral center positioning, the present application further discloses a more specific embodiment of the lateral positioning mechanism 4, which comprises an installation platform 401, a meshing rack 402, a clamping frame 403 and a hydraulic lateral cylinder 404;

[0042] The mounting platform 401 is fixed to the end of the movable rod 102, and the internal gap of the mounting platform 401 forms a mounting cavity, and the two sides of the internal gap are provided with sliding grooves, and two meshing racks 402 are arranged in the mounting cavity, wherein the two meshing racks 402 form an equidistant linkage structure through gears, wherein a plurality of rollers matched with the sliding grooves are arranged on the two sides of the meshing rack 402, the clamping frame 403 is arranged at the bottom of the meshing rack 402 through bolts, and the hydraulic lateral cylinder 404 is arranged between the two clamping frames 403 through the binding seat B. The hydraulic lateral cylinder 404 is used for stroke work to make the two groups of clamping frames 403 and meshing racks 402 relatively expand, and the two meshing racks 402 are moved equidistantly through the cooperation of the gears, and the steel piece positioning device is centrally calibrated as a whole through the mounting groove.

[0043] As shown in Figure 2 and Figure 6 For the convenience of understanding how the horizontal positioning mechanism 5 is adjusted from an inclined state to a horizontal state, the application further discloses a more specific embodiment of the horizontal positioning mechanism 5, which comprises a connecting rod 501, a positioning shaft 502 and a limiting groove 503.

[0044] The connecting rod 501 is arranged in the clamping frame 403, at least one positioning shaft 502 is arranged on the connecting rod 501, and the limiting groove 503 is arranged on the connecting rod 501, wherein the connecting rod 501 is rotationally connected with the positioning shaft 502. The limiting groove 503 is in a horizontal state, and the positioning shaft 502 is perpendicular to the mounting platform 401. The hydraulic lifting cylinder lifts the clamp 2 of the steel expansion joint device 3 to make the steel expansion joint device 3 contact the bottom of one end of the positioning shaft 502, and the auxiliary mechanism 6 is adjusted to make the whole positioning shaft 502 keep horizontal with the edge of the mounting groove, so that the steel expansion joint device 3 is kept at the same height with the mounting groove, and the rotation angle is limited by the limiting groove 503 and the middle end of the connecting rod 501, so that the error of the positioning shaft 502 is effectively avoided.

[0045] As shown in Figure 1 and Figure 3 For the convenience of understanding how the auxiliary mechanism 6 is adjusted from an inclined state to a horizontal state, the application further discloses a more specific embodiment of the auxiliary mechanism 6, which comprises a lifting limiting frame 601, an adjusting cylinder 602, an auxiliary frame 603, a lifting cylinder 604, a driving wheel group 605, a traction rod 606 and an auxiliary wheel 607.

[0046] Among them, the two lifting limit frames 601 are arranged on both sides of the installation platform 401, and a limit adjustment groove is opened inside the lifting limit frame 601, wherein the limit adjustment groove matches the raised end of the installation platform 401, and the limit adjustment groove is movably connected to the installation platform 401. The two adjustment cylinders 602 are arranged on the inner side of the bending part of the lifting limit frame 601 and connected to the bottom of the installation platform 401. The auxiliary frame 603 is arranged on one side of the lifting limit frame 601, and the lifting cylinder 604 is arranged on the auxiliary frame 603 through the capstan seat C. The driving wheel group 605 is arranged on the telescopic end of the lifting cylinder 604 through the capstan seat D, wherein the driving wheel group 605 is arranged with a traction rod 606 hinged to the auxiliary frame 603, and the auxiliary wheel 607 is arranged inside the auxiliary frame 603. The present invention articulates the traction rod 606 with the drive wheel group 605 and the auxiliary frame 603 in conjunction with the lifting cylinder 604, so that the drive wheel group 605 can perform short-path folding adjustment work, and cooperates with the movable connection between the limit adjustment groove and the installation platform 401 and the adjustment cylinder 602 to perform secondary short-path lifting and lowering adjustment to adapt to the clamping work of the steel expansion joint device 3 and the lifting and lowering adjustment work of the steel expansion joint device 3 in the installation groove.

[0047] A method for using a steel part positioning device for a bridge steel structure comprises the following steps:

[0048] S100, measurement processing: using a measuring tool to measure and mark the installation grooves required for the steel expansion joint device 3 at the cement pavement at both ends of the prefabricated steel structure bridge section;

[0049] S200, cutting process: cutting the marked area with a cutting tool;

[0050] S300, cleaning and processing: breaking and cleaning the cement stone blocks manually and using a breaking device;

[0051] S400, pre-embedded treatment: manually fix the steel frame in the installation groove with cement;

[0052] S500, positioning and installing: first, the steel piece positioning device is installed by artificial and connected with the driving vehicle tail end traction frame, then the hydraulic drive device is connected with the steel piece positioning device hydraulic assembly, the clamp 2 is used to clamp the steel expansion joint device 3 and move to the installation slot, first, the main frame body 101 is connected with the movable rod 102, the hydraulic transverse cylinder 103 is used for synchronous bidirectional distance moving, the steel expansion joint device 3 is horizontally centered and displaced in the installation slot under the limitation of the steel structure bridge cutting and chiseling installation slot, then the hydraulic transverse cylinder 103 is back working, then the driving wheel group 605 is preliminarily lowered by the lifting cylinder 604, then the clamp 2 is raised under the hydraulic lifting cylinder back working, at this time, the steel expansion joint device 3 is in contact with the one end bottom of the positioning shaft rod 502, the positioning shaft rod 502 is kept horizontal with the installation slot edge by the auxiliary mechanism 6 lifting adjustment, so that the steel expansion joint device 3 is equal height with the installation slot, then the two groups of clamping frames 403 and meshing racks 402 are relatively expanded by the hydraulic lateral cylinder 404, the two meshing racks 402 are moved at equal distance by the gear, the steel piece positioning device is centered and calibrated by the installation slot, and the adjusting cylinder 602 is set to be secondarily short distance lifting adjusted, so as to adapt to the steel expansion joint device 3 in the installation slot, the other end of the positioning shaft rod 502 is kept horizontal with the installation slot edge, and the horizontal centering adjustment is carried out.

[0053] S600, welding and fixing: the reinforcing bar frame is welded with the steel reinforcement of the steel expansion joint device 3 by artificial, and the installation slot gap is filled with cement.

[0054] The embodiments of the present application are disclosed, but not limited to the above, the ordinary skilled in the art can easily understand the spirit of the present application according to the above embodiments, and make different inferences and changes, as long as they do not deviate from the spirit of the present application, they are within the protection scope of the present application.

Claims

1. A steel positioning device for a bridge steel structure, characterized in that: include: A connecting mechanism (1), wherein the connecting mechanism (1) is an assembly structure; at least one clamp (2) is arranged at the bottom of the connecting mechanism (1) through a hydraulic lifting cylinder; a steel expansion joint device (3) is arranged on the clamp (2); two lateral positioning mechanisms (4) are respectively arranged at both ends of the connecting mechanism (1); two horizontal positioning mechanisms (5) are respectively arranged on the two lateral positioning mechanisms (4); two auxiliary mechanisms (6), each auxiliary mechanism (6) is arranged on both sides of the corresponding horizontal positioning mechanism (5); wherein the connecting mechanism (1), the clamp (2), the lateral positioning mechanism (4), and the horizontal positioning mechanism (5) drive the steel expansion joint device (3) to move in the X, Y, and Z axes; The connecting mechanism (1) comprises: a main frame (101), arranged above the steel expansion joint device (3); a movable rod (102), sleeved on the end of the main frame (101), wherein the main frame (101) and the movable rod (102) are movably connected; a hydraulic transverse cylinder (103), arranged on the end of the main frame (101) through a capstan A and connected to the movable rod (102); The lateral positioning mechanism (4) comprises: a mounting platform (401) fixedly mounted on the end of the movable rod (102); the internal gap of the mounting platform (401) forms a mounting cavity; and sliding grooves are provided on both sides of the interior of the mounting cavity; Two meshing racks (402) are both arranged in the installation cavity, wherein the two meshing racks (402) form an equidistant linkage structure through gears; wherein a plurality of rollers adapted to the slide grooves are arranged on both sides of the meshing racks (402); A clamping frame (403) is arranged at the bottom of the meshing rack (402) via bolts; A hydraulic lateral cylinder (404) is arranged between the two clamping frames (403) via a capstan seat B; The horizontal positioning mechanism (5) comprises: a connecting rod (501) arranged inside the clamping frame (403); at least one positioning shaft (502) arranged on the connecting rod (501); and a limiting groove (503) opened on the connecting rod (501), wherein the connecting rod (501) is rotatably connected to the positioning shaft (502); wherein the hydraulic lifting cylinder lifts the clamp holding the steel expansion joint device so that the steel expansion joint device contacts the bottom of one end of the positioning shaft (502), and cooperates with the auxiliary mechanism (6) to adjust the lifting to keep the positioning shaft (502) as a whole horizontal with the edge of the installation groove, so that the steel expansion joint device and the installation groove are at the same height, and at the same time, the limiting groove and the middle end of the connecting rod are used to limit the rotation angle, effectively avoiding the positioning shaft (502) from having an error.

2. A steel member positioning device for a bridge steel structure according to claim 1, characterized in that: The limiting groove (503) is horizontal.

3. The steel member positioning device for a bridge steel structure according to claim 2, characterized in that: The auxiliary mechanism (6) comprises: two lifting limit frames (601), respectively arranged on both sides of the mounting platform (401); wherein a limit adjustment groove is provided inside the lifting limit frame (601), wherein the limit adjustment groove matches the raised end portion of the mounting platform (401); wherein the limit adjustment groove is movably connected to the mounting platform (401); Two adjusting cylinders (602) are arranged on the inner side of the bend of the lifting limit frame (601) and connected to the bottom of the installation platform (401); the auxiliary frame (603) is arranged on one side of the lifting limit frame (601); the lifting cylinder (604) is arranged on the auxiliary frame (603) through a capstan seat C; the driving wheel group (605) is arranged on the telescopic end of the lifting cylinder (604) through a capstan seat D; wherein the driving wheel group (605) is arranged with a traction rod (606) hinged to the auxiliary frame (603), and an auxiliary wheel (607) is arranged inside the auxiliary frame (603).

4. The method for using the steel positioning device for a bridge steel structure according to any one of claims 1 to 3, characterized in that: The following steps are involved: S100, measurement processing: using a measuring tool to measure and mark the installation grooves required for the steel expansion joint device (3) at the cement pavement at both ends of the prefabricated steel structure bridge section; S200, cutting process: cutting the marked area with a cutting tool; S300, cleaning and processing: breaking and cleaning the cement stone blocks manually and using a breaking device; S400, pre-embedded treatment: manually fix the steel frame in the installation groove with cement; S500, positioning and installation processing: first, manually install the steel positioning device and connect it to the traction frame at the rear end of the driving vehicle, then connect the hydraulic drive device to the hydraulic assembly of the steel positioning device, use the hydraulic drive device to make the clamp (2) clamp the steel expansion joint device (3), and move it into the installation groove, first through the main frame (101) and the movable rod (102) movably connected and set, cooperate with the hydraulic transverse cylinder (103) to make a fixed distance movement in both directions, under the limit of the installation groove that needs to be cut and chiseled of the steel structure bridge, make the steel expansion joint device (3) perform a lateral centering displacement adjustment in the installation groove, then make the hydraulic transverse cylinder (103) perform a return work, then make the driving wheel group (605) perform a preliminary drop through the lifting cylinder (604), and then the clamp (2) rises under the return work of the hydraulic lifting cylinder Lift, at this time the steel expansion joint device (3) contacts the bottom of one end of the positioning shaft (502), and the auxiliary mechanism (6) is adjusted to lift and lower the positioning shaft (502) so that the entire positioning shaft (502) is kept horizontal with the edge of the installation groove, so that the steel expansion joint device (3) is at the same height as the installation groove, and then the hydraulic lateral cylinder (404) is used to perform a stroke operation to make the two sets of clamping frames (403) and the meshing rack (402) relatively unfold, and the two meshing racks (402) are moved equidistantly in cooperation with the gear, and the steel positioning device is centered and calibrated as a whole by relying on the installation groove, and the adjustment cylinder (602) is set to perform a secondary short-path lifting and lowering adjustment to adapt to the downward adjustment of the steel expansion joint device (3) in the installation groove, so that the other end of the positioning shaft (502) is kept horizontal with the edge of the installation groove, and the horizontal centering adjustment is performed; S600, welding and fixing, manually welding the steel frame to the bottom steel bars of the steel expansion joint device (3), and filling the gaps in the installation slots with cement.

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