A limiting guide device for steel box girder jacking construction

Abstract

The present invention discloses a position limiting guide device for jacking construction of steel box girders, comprising a device housing, a stepping motor and a first worm gear. The front and rear portions of the left side of the inner cavity of the device housing are both provided with a first rotating shaft, and the outer surface of the first rotating shaft located at the front portion is provided with a first worm gear; the ends of the two first rotating shafts close to each other are both provided with a first mounting plate, and the ends of the two first mounting plates close to each other are provided with a first connecting shaft on the side away from the center of the first rotating shaft, and the outer surface of the first connecting shaft is provided with a V-shaped rod, and the left and right ends of the V-shaped rod are respectively provided with a first rotating rod and an adjusting device, and the upper end of the first rotating rod is provided with a jacking device. The present invention designs the V-shaped rod and the adjusting device to increase the applicability of the device when in use, and designs the jacking device to prevent the steel box girder from moving when being jacked up, thereby affecting the accuracy of the steel box girder installation, while increasing the applicability of the device when in use, and effectively solving the problems of poor applicability of the device when in use and poor accuracy of the steel box girder installation.

Description

Technical Field

[0001] The invention belongs to the technical field of steel box girder limit guide construction, and in particular relates to a limit guide device for steel box girder jacking construction. Background Art

[0002] Steel box girders are commonly used in the main structures of buildings and bridges, primarily serving as the primary load-bearing system. With the continuous development of urban municipal bridge construction, jacking construction technology has been widely adopted due to its advantages of ease of construction, low noise levels, smooth construction, and guaranteed quality. During jacking construction, guide devices are required to ensure that the bridge follows the predetermined jacking route. If the main girder deviates significantly from the jacking route, a limiter device is required to return the bridge to the predetermined jacking route.

[0003] Chinese patent document CN218757041U discloses a limit guide device for steel box girder jacking construction, which relates to the technical field of steel box girder jacking construction, including a base plate, the upper end of the base plate is fixed with a support rod and a telescopic cylinder, the upper end of the telescopic cylinder is telescopically connected to the telescopic rod, the surface of the telescopic rod is rotatably connected with a linkage rod and a rod body, and the upper end of the support rod is fixed with a fixed plate. The invention changes the height of the limit guide rod through a shift groove, so that the rotating ball does not rub against the surface of the steel beam box, and at the same time changes the rotation direction of the rotating ball through a rotating motor, so that the rotating ball can play the role of limiting and guiding at the same time, and the linkage rod limits the position of the limit guide rod to ensure stable support of the limit guide rod.

[0004] When in use, the device cannot adjust the jacking stroke according to different working scenarios, which makes the device poorly applicable. In addition, the steel box girder cannot be limited during the jacking process, which makes the accuracy of the steel box girder installation poor, and the device cannot be adjusted to different jacking directions, which makes it poorly applicable when in use. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a limiting guide device for the jacking construction of steel box girders in response to the above-mentioned deficiencies in the existing technology. The device is novel and reasonable in design, and adopts a design in which a V-shaped rod is matched with an adjusting device, which increases the applicability of the device when in use. The design of the jacking device prevents the steel box girder from moving when being jacked up, thereby affecting the accuracy of the steel box girder installation. At the same time, it increases the applicability of the device when in use, effectively solving the problems of poor applicability of the device when in use and poor accuracy of the steel box girder installation, and is convenient for promotion and use.

[0006] In order to solve the above technical problems, the technical solution adopted by the present invention is: a limiting guide device for steel box girder jacking construction, characterized in that: it includes a device box body, the four corners of the lower end of the device box body are provided with support legs, the front end of the device box body is provided with a stepper motor, the output end of the stepper motor is provided with a first worm, the front and rear parts of the left side of the inner cavity of the device box body are provided with a first rotating shaft, and the front and rear sides of the outer surface of the first rotating shaft located at the front part are provided with a first worm gear adapted to the first worm; the ends of the two first rotating shafts close to each other are provided with a first mounting plate, the ends of the two first mounting plates close to each other are provided with a first connecting shaft on the side away from the center of the first rotating shaft, the outer surface of the first connecting shaft is provided with a V-shaped rod, the left and right ends of the V-shaped rod are respectively provided with a first rotating rod and an adjusting device, and the upper end of the first rotating rod is provided with a jacking device.

[0007] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: the adjusting device includes a third rotating shaft, and the third rotating shaft passes through the supporting leg, a control handle is provided at the front end of the third rotating shaft, and the control handle is located outside the device box, a fixing clamp is provided at the front end of the outer surface of the third rotating shaft, an eccentric disc is provided in the middle of the outer surface of the third rotating shaft, the eccentric disc and the third rotating shaft are non-concentric shafts, a connecting rod is provided on the outer surface of the eccentric disc, and the connecting rod is connected to the side of the V-shaped rod away from the first rotating rod.

[0008] The above-mentioned limiting guide device for jacking construction of steel box girders is characterized in that: the jacking device includes a mounting tube, a limiting groove adapted to the mounting tube is opened at the upper end of the device box body, two support blocks are provided at the lower end of the mounting tube, a second rotating shaft is provided between the two support blocks, a gear set is provided in the middle of the outer surface of the second rotating shaft, and the second rotating shaft is connected to the first rotating rod; a second worm is provided on the bottom surface of the inner cavity of the mounting tube, a second worm wheel adapted to the second worm is provided on the side of the bottom surface of the inner cavity of the mounting tube away from the center, a first meshing gear is provided on the upper end of the second worm wheel, a support plate is provided in the middle of the inner cavity of the mounting tube, and a limiting device is provided on the upper end of the support plate.

[0009] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: the limiting device includes a reciprocating screw, a second meshing gear meshing with the first meshing gear is provided at the lower end of the support plate, a reciprocating nut is provided on the outer surface of the reciprocating screw, a second mounting plate is provided on the outer surface of the reciprocating nut, a first meshing gear ring is provided on the upper end of the second mounting plate, and a second meshing gear ring is provided on the upper end of the first meshing gear ring.

[0010] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: two sets of guide mechanisms are provided at the upper end of the second mounting plate, two guide rods are symmetrically provided at the upper end of the support plate, and two third meshing gears adapted to the guide rods are provided at the upper end of the second mounting plate, and the two third meshing gears are respectively meshed with the first meshing gear ring and the second meshing gear ring.

[0011] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: a spiral rib is provided on the upper part of the outer surface of the guide rod, a limiting block adapted to the spiral rib is provided on the lower part of the outer surface of the guide rod, and a groove adapted to the spiral rib and the limiting block is provided on the upper end of the third meshing gear.

[0012] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: the number of guide mechanisms in each group is two, and the guide mechanisms in the same group are cross-distributed with the guide mechanisms in another group, and the guide mechanisms include a fourth meshing gear, and the fourth meshing gears in different groups are respectively meshed with the first meshing gear ring and the second meshing gear ring, a third mounting plate is provided at the upper end of the fourth meshing gear, two support rods are provided at the upper end of the third mounting plate, and a guide wheel is commonly provided between the two support rods.

[0013] The above-mentioned limiting guide device for steel box girder jacking construction is characterized in that: when the third meshing gear is adapted to the spiral rib, the horizontal planes of the guide wheels in different groups are perpendicular to each other; when the limiting device moves to the top, the horizontal planes of the multiple guide wheels are parallel to each other.

[0014] Compared with the prior art, the present invention has the following advantages:

[0015] 1. The present invention adopts a design in which a V-shaped rod cooperates with an adjusting device, and the first worm wheel and the first worm gear cooperate with each other to drive the first rotating shaft to rotate. The worm wheel and worm gear design prevents the first rotating shaft from driving the first worm gear to rotate when the device is in use, so that the pushing device cannot lift the steel box girder, thereby affecting the stability of the device during use. The eccentric design of the eccentric disc makes it possible to adjust the extreme value of the distance between the connecting rod and the first rotating shaft, and further cooperates with the V-shaped rod to adjust the stroke of the pushing device sliding up and down, so that the device can be suitable for pushing operations of steel box girders in different working environments, thereby increasing the applicability of the device during use.

[0016] 2. The present invention adopts the design of a pushing device, which can be moved up and down through the guide mechanism, thereby limiting and guiding the steel box girder. The first meshing gear ring, the second meshing gear ring and the corresponding guide mechanism and the third meshing gear cooperate with each other, so that the inclination angle of the guide mechanism can be controlled, and further, when the inclination directions of multiple guide mechanisms are the same, the steel box girder can be guided. When the inclination directions of the two groups of guide mechanisms are different, the pushing direction of the steel box girder can be limited, so that the steel box girder will not move when it is lifted to a position other than the top, preventing the steel box girder from moving when it is lifted, thereby affecting the accuracy of the steel box girder installation. The design of matching the guide rod with the third meshing gear allows the device to adjust the inclination angle of multiple guide mechanisms when in use, so that the device can be suitable for steel box girders with different pushing directions, thereby increasing the applicability of the device when in use.

[0017] To sum up, the design of the present invention is novel and reasonable. The design of the V-shaped rod and the adjustment device is adopted to increase the applicability of the device when used. The design of the pushing device is adopted to prevent the steel box girder from moving when being lifted, thereby affecting the accuracy of the steel box girder installation. At the same time, it increases the applicability of the device when used, effectively solves the problems of poor applicability of the device when used and poor accuracy of the steel box girder installation, and is convenient for promotion and use.

[0018] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 This is a schematic diagram of the internal structure of the device box of the present invention;

[0021] Figure 3 It is a structural schematic diagram of the regulating device of the present invention;

[0022] Figure 4 An exploded view of the adjustment device of the present invention cooperating with the V-shaped rod;

[0023] Figure 5 It is a structural schematic diagram of the pushing device of the present invention;

[0024] Figure 6 It is a schematic structural diagram of the push device and the first rotating rod of the present invention;

[0025] Figure 7 Schematic diagram of the structure of the limiting device of the present invention;

[0026] Figure 8 It is a structural schematic diagram of the guide mechanism of the present invention;

[0027] Figure 9 It is a schematic structural diagram of the guide rod and the third meshing gear of the present invention;

[0028] Figure 10 This is a schematic structural diagram of the pushing device of the present invention when the vertical portions of the four guide wheels are parallel to each other;

[0029] Figure 11 For the present invention Figure 6 Enlarged view of point A in the middle;

[0030] Figure 12 For the present invention Figure 10 Enlarged view of point B in the middle.

[0031] Description of reference numerals: 1—device housing; 2—pushing device; 3—adjusting device;

[0032] 11—support leg; 12—stepping motor; 13—first worm;

[0033] 14—first rotating shaft; 15—first worm gear; 16—first mounting plate;

[0034] 17—first connecting shaft; 18—V-shaped rod; 19—first rotating rod;

[0035] 21 - mounting tube; 22 - support block; 23 - second rotation axis;

[0036] 24—gear set; 25—second worm; 26—second worm wheel;

[0037] 27 - first meshing gear; 28 - support plate; 29 - limit device;

[0038] 291—reciprocating screw; 292—second meshing gear; 293—reciprocating nut;

[0039] 294 - second mounting plate; 295 - first meshing gear ring; 296 - second meshing gear ring;

[0040] 297—guide mechanism; 2971—fourth meshing gear; 2972—third mounting plate;

[0041] 2973—Support rod; 2974—Guide wheel; 298—Guide rod;

[0042] 2981—spiral rib; 2982—limiting block; 299—third meshing gear;

[0043] 31 - third rotating shaft; 32 - control handle; 33 - eccentric disc;

[0044] 34—Connecting rod; 35—Fixing clamp. DETAILED DESCRIPTION

[0045] Example 1

[0046] like Figure 1-12As shown, a limiting guide device for jacking construction of steel box beams includes a device box body 1, support legs 11 are provided at the four corners of the lower end of the device box body 1, a stepper motor 12 is provided at the front end of the device box body 1, and a first worm 13 is provided at the output end of the stepper motor 12. The front and rear parts of the left side of the inner cavity of the device box body 1 are provided with a first rotating shaft 14, and the connection relationship between the device box body 1 and the two first rotating shafts 14 is a rotating connection. The outer front side of the first rotating shaft 14 located at the front is provided with a first worm wheel 15 adapted to the first worm 13. The first worm wheel 15 cooperates with the first worm 13 to drive the first rotating shaft 14 to rotate, and adopts a worm gear design to prevent the first rotating shaft 14 from driving the first worm 13 to rotate when the device is in use, thereby affecting the stability of the device when in use.

[0047] Specifically, the ends of the two first rotating shafts 14 close to each other are each provided with a first mounting plate 16, and the two first mounting plates 16 are used for the eccentric installation of the first connecting shaft 17. The ends of the two first mounting plates 16 close to each other are provided with a first connecting shaft 17 on the side away from the center of the first rotating shaft 14. The first connecting shaft 17 adopts an eccentric design, so that when the first rotating shaft 14 rotates, it cooperates with the V-shaped rod 18 and the first rotating rod 19, so that the pushing device 2 can slide up and down. A V-shaped rod 18 is provided on the outer surface of the first connecting shaft 17. The connection relationship between the first connecting shaft 17 and the V-shaped rod 18 is a rotating connection. The V-shaped rod 18 adopts a V-shaped design, which is used for the connection between the first rotating rod 19 and the adjusting device 3. The left and right ends of the V-shaped rod 18 are respectively provided with the first rotating rod 19 and the adjusting device 3. The connection relationship between the V-rod 18 and the first rotating rod 19 is a rotating connection, and the upper end of the first rotating rod 19 is provided with a pushing device 2.

[0048] Furthermore, in order to enable the device to adjust the stroke of the pushing device 2 sliding up and down when in use, as shown in FIG. Figure 2-12 As shown, the adjusting device 3 includes a third rotating shaft 31, and the third rotating shaft 31 passes through the supporting leg 11. The connection relationship between the third rotating shaft 31 and the supporting leg 11 is a rotating connection. A control handle 32 is provided at the front end of the third rotating shaft 31, and the control handle 32 is located outside the device box 1. The control handle 32 is used to adjust the third rotating shaft 31, and further adjust the distance between the connecting rod 34 and the first rotating shaft 14. A fixing clamp 35 is provided at the front of the outer surface of the third rotating shaft 31. The connection relationship between the left part of the fixing clamp 35 close to the supporting leg 11 and the supporting leg 11 is a fixed connection. The connection relationship between the fixing clamp 35 and the third rotating shaft 31 is a movable connection. The fixing clamp 35 is used to fix the third rotating shaft 31. An eccentric disc 33 is provided in the middle of the outer surface of the third rotating shaft 31.

[0049] Specifically, the eccentric disc 33 and the third rotating shaft 31 are non-concentric shafts. The eccentric disc 33 adopts an eccentric design, so that the extreme value of the distance between the connecting rod 34 and the first rotating shaft 14 can be adjusted, and further cooperates with the V-shaped rod 18, so that the up and down sliding stroke of the pushing device 2 can be adjusted, so that the device can be suitable for the pushing operation of steel box girders in different working environments, which increases the applicability of the device when used. A connecting rod 34 is provided on the outer surface of the eccentric disc 33, and the connecting rod 34 is connected to the side of the V-shaped rod 18 away from the first rotating rod 19. The connection relationship between the connecting rod 34 and the eccentric disc 33 is a rotating connection.

[0050] Specific implementation method: When in use, first rotate the control bolt of the fixed clamp 35 so that the position relationship between the connecting rod 34 and the eccentric disc 33 can be adjusted, and the control handle 32 is rotated according to the height of the steel box girder to be pushed. The stepper motor 12 is started, and the stepper motor 12 drives the first rotating shaft 14 to rotate through the connection relationship between the first worm 13 and the first worm wheel 15, and drives the pushing device 2 to reciprocate up and down through the connection relationship between the first connecting shaft 17 and the V-shaped rod 18 and the first rotating rod 19, thereby achieving the lifting and lowering of the steel box girder.

[0051] Example 2

[0052] This embodiment further improves the jacking device 2 on the basis of the first embodiment, so as to achieve the purpose of limiting and guiding the steel box girder when jacking.

[0053] like Figure 5-12 As shown, the pushing device 2 includes a mounting tube 21, and a limiting groove adapted to the mounting tube 21 is opened at the upper end of the device box 1. The connection relationship between the mounting tube 21 and the limiting groove is a sliding connection. Two support blocks 22 are provided at the lower end of the mounting tube 21. The two support blocks 22 are used to install the second rotating shaft 23. A second rotating shaft 23 is provided between the two support blocks 22. The second rotating shaft 23 is used to connect the gear set 24 and the first rotating rod 19. A gear set 24 is provided in the middle of the outer surface of the second rotating shaft 23, and the second rotating shaft 23 is connected to the first rotating rod 19. The connection relationship between the second rotating shaft 23 and the first rotating rod 19 is a rotating connection. The connection relationship between the first rotating rod 19 and the gear located at the lower part of the gear set 24 is a fixed connection. The connection relationship between the second rotating shaft 23 and the gear located at the lower part of the gear set 24 is a rotating connection. The second rotating shaft 23 and the gear set 24 are connected to the first rotating rod 19 through the connection between the first rotating rod 19, so that the first rotating rod 19 can drive the second worm 25 to rotate when it rotates.

[0054] Specifically, a second worm 25 is provided on the bottom surface of the inner cavity of the mounting tube 21, and the connection relationship between the second worm 25 and the mounting tube 21 is a rotational connection, and the connection relationship between the second worm 25 and the gear located on the upper part of the gear set 24 is a fixed connection. A second worm wheel 26 adapted to the second worm 25 is provided on the side of the bottom surface of the inner cavity of the mounting tube 21 away from the center, and the connection relationship between the second worm wheel 26 and the mounting tube 21 is a rotational connection. The second worm 25 cooperates with the second worm wheel 26 so that when the first rotating rod 19 rotates relative to the second rotating shaft 23, it drives the second meshing gear 292 to rotate. A first meshing gear 27 is provided at the upper end of the second worm wheel 26, and a support plate 28 is provided in the middle of the inner cavity of the mounting tube 21, and a limit device 29 is provided at the upper end of the support plate 28.

[0055] Furthermore, in order to enable the jacking device 2 to limit the steel box girder when jacking it up, the jacking device 2 can guide the steel box girder when jacking it up to the top, such as Figure 7-12 As shown, the limiting device 29 includes a reciprocating screw 291, and the connection relationship between the reciprocating screw 291 and the support plate 28 is a rotational connection. The lower end of the support plate 28 is provided with a second meshing gear 292 meshing with the first meshing gear 27, and the connection relationship between the second meshing gear 292 and the support plate 28 is a rotational connection. The first meshing gear 27 drives the reciprocating screw 291 to rotate by mutual meshing with the second meshing gear 292. The outer surface of the reciprocating screw 291 is provided with a reciprocating nut 293 adapted to the reciprocating screw 291. The reciprocating nut 293 cooperates with the reciprocating screw 291, so that when the reciprocating screw 291 rotates in one direction, the second mounting plate 294 can slide back and forth in the inner cavity of the mounting tube 21, and further, the guide mechanism 297 can play a role in limiting and guiding the steel box girder.

[0056] Specifically, a second mounting plate 294 is provided on the outer surface of the reciprocating nut 293, and the connection relationship between the second mounting plate 294 and the mounting tube 21 is a sliding connection. The second mounting plate 294 is used for the installation of the first meshing gear ring 295, the guide mechanism 297, and the third meshing gear 299. The upper end of the second mounting plate 294 is provided with a first meshing gear ring 295, and the connection relationship between the second mounting plate 294 and the first meshing gear ring 295 is a rotating connection. The upper end of the first meshing gear ring 295 is provided with a second meshing gear ring 296, and the connection relationship between the first meshing gear ring 295 and the second meshing gear ring 296 is a rotating connection.

[0057] Specifically, the first meshing gear ring 295 and the second meshing gear ring 296 cooperate with each other through the corresponding guide mechanism 297 and the third meshing gear 299, so as to control the inclination angle of the guide mechanism 297. Further, when the inclination directions of the multiple guide mechanisms 297 are the same, the steel box girder can be guided. When the inclination directions of the two groups of guide mechanisms 297 are different, the pushing direction of the steel box girder can be limited, so that the steel box girder will not move when it is jacked to a position other than the top, thereby preventing the steel box girder from moving when it is jacked, thereby affecting the accuracy of the steel box girder installation. Two groups of guide mechanisms 297 are provided on the upper end of the second mounting plate 294, and the support plate 28 Two guide rods 298 are symmetrically provided at the upper end, and the connection between the guide rod 298 and the support plate 28 is a movable connection, and the connection between the guide rod 298 and the mounting tube 21 is a threaded connection. Two third meshing gears 299 adapted to the guide rod 298 are provided at the upper end of the second mounting plate 294, and the connection between the third meshing gear 299 and the second mounting plate 294 is a rotating connection. The two third meshing gears 299 are respectively meshed with the first meshing gear ring 295 and the second meshing gear ring 296, so that when the third meshing gear 299 rotates, it can drive the first meshing gear ring 295 or the second meshing gear ring 296 adapted to it to rotate.

[0058] Specifically, a spiral rib 2981 is provided on the upper part of the outer surface of the guide rod 298, and a limit block 2982 is provided on the lower part of the outer surface of the guide rod 298 to match the spiral rib 2981. A groove is provided on the upper end of the third meshing gear 299 to match the spiral rib 2981 and the limit block 2982, so that the device can adjust the tilt angle of multiple guide mechanisms 297 when in use, so that the device can be suitable for steel box girders with different pushing directions, which increases the applicability of the device when in use.

[0059] Furthermore, in order to prevent the steel box girder from moving during the process of being lifted, thereby affecting the accuracy of the steel box girder installation, Figure 9-12 As shown, there are two guide mechanisms 297 in each group, and the guide mechanisms 297 in the same group are cross-distributed with the guide mechanisms 297 in the other group. The guide mechanisms 297 include a fourth meshing gear 2971. The connection between the fourth meshing gear 2971 and the gear group 24 is a rotational connection. The fourth meshing gears 2971 in different groups are respectively meshed with the first meshing gear ring 295 and the second meshing gear ring 296, so that when the first meshing gear ring 295 and the second meshing gear ring 296 rotate, they can drive the guide mechanism 297 of the group adapted thereto to rotate. A third mounting plate 2972 ​​is provided at the upper end of the fourth meshing gear 2971, and two support rods 2973 are provided at the upper end of the third mounting plate 2972. A guide wheel 2974 is provided between the two support rods 2973, and the connection between the guide wheel 2974 and the two support rods 2973 is a rotational connection.

[0060] Specifically, when the third meshing gear 299 is matched with the spiral rib 2981, the horizontal surfaces of the guide wheels 2974 located in different groups are perpendicular to each other, so that the steel box girder will not move when moving upward or downward, thereby increasing the accuracy of the device when in use; when the limiting device 29 moves to the top, the horizontal surfaces of the multiple guide wheels 2974 are parallel to each other, so that the steel box girder can only move when it moves to the top, thereby increasing the accuracy of the device when in use.

[0061] The specific implementation is as follows: when the first rotating rod 19 rotates, the first rotating rod 19 and the gear set 24 cooperate with each other to further rotate the second meshing gear 292, and the reciprocating screw 291 cooperates with the reciprocating nut 293 to further make the second mounting plate 294 slide up and down in the mounting tube 21, so that the guide mechanism 297 can move up and down. When the third meshing gear 299 cooperates with the corresponding limit block 2982, the vertical surfaces of the guide wheels 2974 of different groups are perpendicular to each other, limiting the steel box girder, so that The steel box girder will not move forward, backward, left or right during the process of moving up and down, thereby increasing the stability of the device when in use. When the third meshing gear 299 cooperates with the corresponding spiral rib 2981, it drives the corresponding first meshing gear ring 295 or the second meshing gear ring 296 to rotate. The first meshing gear ring 295 and the second meshing gear ring 296 cooperate with the fourth meshing gear 2971 meshed with them, thereby driving a group of guide mechanisms 297 adapted to them to rotate, and further making the vertical surfaces of the multiple guide wheels 2974 parallel to each other, so that the steel box girder can be pushed.

[0062] The above description is only a preferred embodiment of the present invention and does not limit the present invention in any way. Any simple modification, change and equivalent structural change made to the above embodiment based on the technical essence of the present invention shall still fall within the scope of protection of the technical solution of the present invention.

Claims

1. A limiting guide device for jacking construction of a steel box girder, characterized by: The invention comprises a device housing (1), wherein the four corners of the lower end of the device housing (1) are provided with support legs (11), the front end of the device housing (1) is provided with a stepping motor (12), the output end of the stepping motor (12) is provided with a first worm (13), the front and rear parts of the left side of the inner cavity of the device housing (1) are provided with a first rotating shaft (14), and the front side of the outer surface of the first rotating shaft (14) located at the front part is provided with a first worm wheel (15) adapted to the first worm (13); the ends of the two first rotating shafts (14) close to each other are provided with a first mounting plate (16), the ends of the two first mounting plates (16) close to each other and away from the center of the first rotating shaft (14) are provided with a first connecting shaft (17), the outer surface of the first connecting shaft (17) is provided with a V-shaped rod (18), the left and right ends of the V-shaped rod (18) are provided with a first rotating rod (19) and an adjusting device (3), and the upper end of the first rotating rod (19) is provided with a pushing device (2); The pushing device (2) includes a mounting tube (21), a limiting groove adapted to the mounting tube (21) is provided at the upper end of the device housing (1), two support blocks (22) are provided at the lower end of the mounting tube (21), a second rotating shaft (23) is provided between the two support blocks (22), a gear set (24) is provided in the middle of the outer surface of the second rotating shaft (23), and the second rotating shaft (23) is connected to the first rotating rod (19); a second worm (25) is provided on the bottom surface of the inner cavity of the mounting tube (21), a second worm wheel (26) adapted to the second worm (25) is provided on the side of the inner cavity bottom surface of the mounting tube (21) away from the center, a first meshing gear (27) is provided at the upper end of the second worm wheel (26), a support plate (28) is provided in the middle of the inner cavity of the mounting tube (21), and a limiting device (29) is provided at the upper end of the support plate (28); The limiting device (29) includes a reciprocating screw (291), a second meshing gear (292) meshing with the first meshing gear (27) is provided at the lower end of the support plate (28), a reciprocating nut (293) is provided on the outer surface of the reciprocating screw (291), a second mounting plate (294) is provided on the outer surface of the reciprocating nut (293), a first meshing gear ring (295) is provided at the upper end of the second mounting plate (294), and a second meshing gear ring (296) is provided at the upper end of the first meshing gear ring (295); Two sets of guide mechanisms (297) are provided at the upper end of the second mounting plate (294); The number of guide mechanisms (297) in each group is two, and the guide mechanisms (297) in the same group are cross-distributed with the guide mechanisms (297) in the other group. The guide mechanisms (297) include a fourth meshing gear (2971). The fourth meshing gears (2971) in different groups are respectively meshed with the first meshing gear ring (295) and the second meshing gear ring (296). A third mounting plate (2972) is provided at the upper end of the fourth meshing gear (2971). Two support rods (2973) are provided at the upper end of the third mounting plate (2972). A guide wheel (2974) is provided between the two support rods (2973).

2. A position limiting guide device for jacking construction of a steel box girder according to claim 1, characterized in that: The adjusting device (3) includes a third rotating shaft (31), and the third rotating shaft (31) passes through the supporting leg (11). A control handle (32) is provided at the front end of the third rotating shaft (31), and the control handle (32) is located outside the device box (1). A fixing clamp (35) is provided at the front of the outer surface of the third rotating shaft (31). An eccentric disk (33) is provided in the middle of the outer surface of the third rotating shaft (31). The eccentric disk (33) and the third rotating shaft (31) are non-concentric axes. A connecting rod (34) is provided on the outer surface of the eccentric disk (33), and the connecting rod (34) is connected to the side of the V-shaped rod (18) away from the first rotating rod (19).

3. A position limiting guide device for jacking construction of a steel box girder according to claim 1, characterized in that: Two guide rods (298) are symmetrically provided on the upper end of the support plate (28), and two third meshing gears (299) adapted to the guide rods (298) are provided on the upper end of the second mounting plate (294). The two third meshing gears (299) are respectively meshed with the first meshing gear ring (295) and the second meshing gear ring (296).

4. A position limiting guide device for jacking construction of a steel box girder according to claim 3, characterized in that: The upper portion of the outer surface of the guide rod (298) is provided with a spiral rib (2981), the lower portion of the outer surface of the guide rod (298) is provided with a limit block (2982) adapted to the spiral rib (2981), and the upper end of the third meshing gear (299) is provided with a groove adapted to the spiral rib (2981) and the limit block (2982).

5. A position limiting guide device for jacking construction of a steel box girder according to claim 4, characterized in that: When the third meshing gear (299) is matched with the spiral rib (2981), the horizontal planes of the guide wheels (2974) in different groups are perpendicular to each other; when the limiting device (29) moves to the uppermost position, the horizontal planes of the plurality of guide wheels (2974) are parallel to each other.

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