Bridge girder erection machine for erecting segmental assembled box girders

Abstract

The bridge girder erection machine comprises a winch arranged on a cross beam, a connecting base is arranged on a lifting rope of the winch, a connecting plate used for being connected with the box girder is arranged on the connecting base in a sliding mode, and the connecting plate is detachably connected with the box girder. And a driving device for driving the connecting plate to move horizontally is arranged on the connecting seat. The device has the effects that the position of the box girder can be conveniently adjusted, and the working risk of constructors is reduced.

Description

Technical Field

[0001] The invention relates to the field of bridge erection machines, in particular to a bridge erection machine for erecting segmental assembled box girders. Background Art

[0002] With the continuous advancement of my country's infrastructure construction, countless elevated railways and elevated highways have been built. During the construction process, prefabricated segmented box girders are installed on bridge piers using a bridge-erecting machine. A bridge-erecting machine generally consists of front legs, rear legs, front supports, rear supports, a crossbeam, and a winch and beam transport vehicle that can move along the length of the crossbeam. During the construction process, the front and rear supports are set on the already cast bridge piers. The rear legs are folded and retracted to the ends of the crossbeam, and the front legs are set directly on the ground. The front and rear supports play the main role in supporting the weight of the bridge-erecting machine. At the same time, two beam transport vehicles are used to transport the box girder to be erected. The ends of the box girder to be erected are then hoisted up by a winch, allowing the box girder to be erected to separate from the beam transport vehicle. The winch moves horizontally on the crossbeam to move the box girder to be erected to the beam erection area. The box girder to be erected is then lowered to the bridge pier by the winch, thereby completing the erection of the bridge.

[0003] During the process of lowering the box girder and installing it on the bridge pier, there will be a certain deviation between the connection position of the bottom of the winch rope and different box girders. As a result, when the box girder is about to contact the mounting seat on the pier, the staff needs to manually adjust the position of the box girder so that the two sides of the box girder being installed are flush with the two sides of the box girder that has been installed. This adjustment method is relatively inconvenient and increases the work risks of the construction workers. Summary of the Invention

[0004] In order to facilitate the adjustment of the position of the box girder and reduce the work risks of construction workers, the present application provides a bridge-building machine for erecting segmented assembled box girders.

[0005] The present application provides a bridge erection machine for erecting segmental assembled box girders, which adopts the following technical solution: A bridge-building machine for erecting segmented box girders comprises a hoist arranged on a crossbeam, a connecting seat being provided on a hoisting rope of the hoist, a connecting plate for connecting to the box girder being slidably provided on the connecting seat, the connecting plate being detachably connected to the box girder, and a driving device for driving the connecting plate to move horizontally being provided on the connecting seat.

[0006] By adopting the above technical solution, when the winch moves to the top of the box girder, the winch lowers the connecting seat through the lifting rope to connect the connecting plate to the box girder. When the winch lifts the box girder, the winch moves horizontally on the crossbeam to move the box girder to the beam erection area. Then the winch lowers the box girder to gradually approach the mounting seat on the pier. When the box girder being hoisted is not aligned with the two sides of the installed box girder, the driving device can drive the connecting plate to slide relative to the connecting seat, so that the connecting plate drives the box girder being hoisted to move, thereby facilitating the adjustment of the position of the box girder being installed and reducing the work risks of construction workers.

[0007] Preferably, the driving device includes an electric motor fixedly connected to the connecting seat, a transmission screw is fixedly connected to the output shaft of the electric motor, a nut seat is mounted on the transmission screw, and the nut seat is fixedly connected to the connecting plate.

[0008] By adopting the above technical solution, when the motor is started, the motor drives the transmission screw to rotate, so that the nut seat installed on the transmission screw drives the connecting plate to move relative to the connecting seat, thereby enabling the driving device to adjust the position of the box beam.

[0009] Preferably, the driving device further comprises a control mechanism, which comprises a fixing plate fixedly connected to the pier, an intermediate seat fixedly connected to the fixing plate, a through hole being provided on the side surface of the intermediate seat, end seats being provided on both sides of the intermediate seat, and the end seats being fixedly connected to the fixing plate, a vertical groove being provided on the top surface of the end seat, a sliding hole being provided on the side wall of the vertical groove close to the intermediate seat, a vertical sliding block being provided in the vertical groove for contacting the inclined surfaces on both sides of the lower part of the box beam, and the vertical hole being vertically slidably provided in the vertical groove A transverse rod is provided between the end seat and the middle seat, and the two ends of the transverse rod are respectively slidably provided in the sliding hole and the through hole, and a first inclined surface is provided on the bottom surface of the vertical slider, and the first inclined surface faces the direction close to the middle seat, and a second inclined surface that can fit with the first inclined surface is provided on the transverse rod, and a thrust piece for preventing the transverse rod from sliding into the through hole is provided in the through hole, and a trigger assembly is provided on the middle seat, and the trigger assembly is used to control the start of the motor when the two transverse rods do not slide synchronously into the through hole.

[0010] By adopting the above technical solution, the fixing plate is first fixedly installed on the bridge pier so that the sides of the two end seats that are away from each other are equidistant from the two sides of the installed box girder, and the trigger assembly is connected to the motor. During the lowering process of the box girder, when the box girder approaches the mounting seat on the pier, the inclined surfaces on both sides of the lower part of the box girder can interfere with the vertical slider. When the box girder continues to be slowly lowered, when the position of the box girder does not deviate, the vertical slider can make the two transverse rods slide synchronously into the through hole through the interference of the first inclined surface and the second inclined surface. When there is a deviation between the two sides of the box girder being installed and the two sides of the installed box girder, the speed at which the two transverse rods slide into the through hole will deviate, thereby causing the trigger assembly to control the motor drive to adjust the position of the box girder being installed.

[0011] Preferably, a sliding groove is provided on the inner wall of the through hole, and the trigger assembly includes a sliding block slidably arranged in the sliding groove, a baffle is fixedly connected to the sliding block, and two thrust pieces are provided and symmetrically arranged on both sides of the baffle, a first fixed contact piece and a second fixed contact piece are embedded on the inner wall of the sliding groove, and a moving contact piece that can contact the first fixed contact piece and the second fixed contact piece separately is embedded in the sliding block, the first fixed contact piece and the second fixed contact piece are arranged on both sides of the moving contact piece, the moving contact piece and the first fixed contact piece are positively connected to the electrical circuit of the motor, and the moving contact piece and the second fixed contact piece are reversely connected to the electrical circuit of the motor.

[0012] By adopting the above technical solution, the moving contact piece and the first fixed contact piece are positively connected to the electrical circuit of the motor, and the moving contact piece and the second fixed contact piece are reversely connected to the electrical circuit of the motor. Therefore, when the two transverse rods do not slide into the through hole at the same time, under the action of the thrust piece, the baffle can drive the sliding block to slide in the sliding groove, so that the moving contact piece contacts the first fixed contact piece or the second moving contact piece, so that the motor can drive the transmission screw to automatically adjust the position of the box girder being installed by forward or reverse rotation.

[0013] Preferably, the thrust member is a thrust spring, one end of the thrust spring abuts against the side surface of the baffle, and the other end of the thrust spring abuts against the end surface of the transverse rod.

[0014] By adopting the above technical solution, one end of the thrust spring abuts against the side surface of the baffle, and the other end of the thrust spring abuts against the end surface of the transverse rod, thereby preventing the transverse rod from sliding into the through hole.

[0015] Preferably, a stop groove is formed on the inner wall of the vertical groove, and a stop block is fixedly connected to the side surface of the vertical sliding block, and the stop block is slidably disposed in the stop groove.

[0016] By adopting the above technical solution, a stopper is fixedly connected to the side of the vertical slider, and the stopper is slidably arranged in the stop groove, thereby preventing the vertical slider from separating from the end seat, making the structure of the control mechanism more stable.

[0017] Preferably, a third inclined surface is provided on the top of the vertical sliding block, and the third inclined surface is used to conflict with the side surface of the lower part of the box beam.

[0018] By adopting the above technical solution, the third inclined surface is used to interfere with the side surface of the lower part of the box beam, so that the box beam can press the vertical slider downward more stably.

[0019] Preferably, a receiving groove is provided on the sliding block, and the movable contact piece is slidably arranged in the receiving groove. A compression spring is provided in the receiving groove, and one end of the compression spring abuts against the side of the movable contact piece close to the baffle, and the other end of the compression spring abuts against the side wall of the receiving groove close to the baffle.

[0020] By adopting the above technical solution, under the elastic force of the compression spring, the movable contact piece can be tightly pressed against the inner wall of the sliding groove, so that when the movable contact piece coincides with the first fixed contact piece or the second fixed contact piece, it can be tightly pressed against the first fixed contact piece or the second fixed contact piece.

[0021] Preferably, a connecting hole is opened on the top surface of the box beam, a connecting screw is fixedly connected to the connecting plate, the connecting screw is inserted into the connecting hole, the connecting screw passes through the connecting hole, a pad is provided on the inner top wall of the box beam, the pad is sleeved on the connecting screw, a connecting nut is provided under the pad, and the connecting nut is threadedly connected to the connecting screw.

[0022] By adopting the above technical solution, when the connecting nut is installed on the connecting screw, the winch can lift the box girder. When the box girder is hoisted into place, the connecting nut is unscrewed from the connecting screw, and the connecting plate can be removed from the box girder, thereby facilitating the disassembly and assembly of the connecting plate and the box girder.

[0023] Preferably, a slide rail is fixedly connected to the connecting seat, a slide block is slidably connected to the slide rail, and the slide block is fixedly connected to the connecting plate.

[0024] By adopting the above technical solution, the sliding block is fixedly connected to the connecting plate, and the sliding block is slidably connected to the slide rail, so that the connecting plate can slide more stably relative to the connecting seat.

[0025] In summary, this application includes at least one of the following beneficial technical effects: 1. After the winch moves to the top of the box girder, it lowers the connection seat through the lifting rope to connect the connection plate to the box girder. After the winch lifts the box girder, it moves horizontally on the crossbeam to move the box girder to the girder erection area. The winch then lowers the box girder so that it gradually approaches the mounting seat on the pier. When the box girder being hoisted is not aligned with the installed box girder on both sides, the drive device can drive the connection plate to slide relative to the connection seat, so that the connection plate drives the box girder being hoisted to move, thereby facilitating the adjustment of the position of the box girder being installed and reducing the work risks of construction workers. 2. The fixing plate is first fixedly installed on the bridge pier so that the sides of the two end seats that are away from each other are equidistant from the two sides of the installed box girder, and the trigger assembly is connected to the motor. During the lowering process of the box girder, when the box girder approaches the mounting seat on the pier, the inclined surfaces on both sides of the lower part of the box girder can interfere with the vertical slider. When the box girder continues to be slowly lowered, when the position of the box girder does not deviate, the vertical slider can make the two transverse rods slide synchronously into the through-holes through the interference of the first and second inclined surfaces. When there is a deviation between the two sides of the box girder being installed and the two sides of the installed box girder, the speed at which the two transverse rods slide into the through-holes will deviate, thereby causing the trigger assembly to control the motor drive to automatically adjust the position of the box girder being installed. 3. The moving contact piece and the first fixed contact piece are positively connected to the electrical circuit of the motor, and the moving contact piece and the second fixed contact piece are reversely connected to the electrical circuit of the motor. Therefore, when the two transverse rods do not slide into the through hole at the same time, under the action of the thrust piece, the baffle can drive the sliding block to slide in the sliding groove, so that the moving contact piece contacts the first fixed contact piece or the second moving contact piece, so that the motor can drive the transmission screw to automatically adjust the position of the box girder being installed by forward or reverse rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] Figure 1 It is a schematic diagram of the overall structure of the bridge erection machine in the embodiment of the present application.

[0027] Figure 2 It is a cross-sectional view of the connecting seat, connecting plate and box beam in the embodiment of the present application.

[0028] Figure 3 It is a cross-sectional view of the control mechanism in the embodiment of the present application.

[0029] Figure 4 yes Figure 3 A partial enlarged view of point A in the middle.

[0030] Figure 5 yes Figure 3 A partial enlarged view of point B in the middle.

[0031] Explanation of reference numerals: 1. crossbeam; 2. hoist; 3. connecting seat; 31. slide rail; 32. sliding block; 4. connecting plate; 41. connecting screw; 42. pad; 43. connecting nut; 5. driving device; 51. motor; 52. transmission screw; 53. nut seat; 54. rotating seat; 55. control mechanism; 551. fixing plate; 552. intermediate seat; 5521. through hole; 55211. sliding groove; 553. end seat; 5531. vertical groove; 55311. retaining groove; 5532. sliding hole; 554. Vertical slider; 5541, stop block; 5542, first inclined surface; 5543, third inclined surface; 5544, return spring; 555, transverse rod; 5551, second inclined surface; 556, trigger assembly; 5561, sliding block; 55611, accommodating groove; 5562, baffle; 5563, thrust piece; 55631, thrust spring; 5564, first fixed contact piece; 5565, second fixed contact piece; 5567, moving contact piece; 5568, compression spring; 6, box girder; 61, connecting hole; 7, bridge pier; 8, mounting seat. DETAILED DESCRIPTION

[0032] The following is combined with Figure 1-5 This application is described in further detail.

[0033] The embodiment of the present application discloses a bridge erection machine for erecting segmental assembled box beams. Figure 1 and Figure 2 As shown, the bridge erection machine includes a crossbeam 1, a hoist 2, a connecting base 3, a connecting plate 4, and a drive device 5. Two hoists 2 are located on the crossbeam 1, with the connecting base 3 corresponding to each hoist 2. The connecting base 3 is mounted at the bottom of the hoist rope of the hoist 2 and can move vertically when the hoist 2 is activated. Each pier 7 is equipped with two mounting bases 8, and the adjacent ends of the two opposing box girders 6 are mounted to the two mounting bases 8 on the pier 7.

[0034] Reference Figure 1 and Figure 2 As shown, the connecting plate 4 corresponds to the connecting seat 3 in a one-to-one manner, and the connecting plate 4 is located below the connecting seat 3. Two slide rails 31 are fixedly connected to the bottom surface of the connecting seat 3. The two slide rails 31 are arranged horizontally, with their lengths parallel to each other and perpendicular to the length of the box girder 6. Sliding blocks 32 are slidably connected to each slide rail 31, and both sliding blocks 32 are fixedly connected to the top surface of the connecting plate 4.

[0035] Reference Figure 1 and Figure 2As shown, the top surface of the box beam 6 is provided with connection holes 61 at both ends, with four connection holes 61 located at each end of the box beam 6. Four connection screws 41 are vertically fixedly connected to the bottom surface of the connection plate 4, and the four connection screws 41 are respectively inserted into the four connection holes 61 at the ends of the box beam 6. The connection screws 41 pass through the connection holes 61. A backing plate 42 is provided on the inner top wall of the box beam 6. The backing plate 42 is sleeved on the connection screws 41. A connection nut 43 is provided below the backing plate 42. The connection nut 43 is threadedly connected to the connection screw 41. The backing plate 42 and the connection nut 43 each correspond to the connection screw 41.

[0036] Reference Figure 1 and Figure 2 As shown, the drive device 5 includes a motor 51, a transmission screw 52, ​​a nut seat 53, a rotating seat 54, and a control mechanism 55. The motor 51 is fixedly connected to the bottom surface of the connecting seat 3. The transmission screw 52 is coaxially fixedly connected to the output shaft of the motor 51. The length of the transmission screw 52 is parallel to the length of the slide rails 31, and the transmission screw 52 is located between the two slide rails 31. The nut seat 53 is mounted on the transmission screw 52 and is fixedly connected to the connecting plate 4. The rotating seat 54 is located at the end of the transmission screw 52 away from the motor 51. The end of the transmission screw 52 away from the motor 51 is rotatably disposed on the rotating seat 54.

[0037] Reference Figure 1 and Figure 3 As shown, the control mechanism 55 includes a fixed plate 551 fixedly connected to the pier 7, an intermediate seat 552 is fixedly connected to the fixed plate 551, a through hole 5521 is provided on the side of the intermediate seat 552, and end seats 553 are provided on both sides of the intermediate seat 552. The distance between the two end seats 553 and the intermediate seat 552 is equal, and the end seats 553 are fixedly connected to the fixed plate 551.

[0038] Reference Figure 3 and Figure 4 As shown, a vertical groove 5531 is provided on the top surface of the end seat 553, and a sliding hole 5532 is provided on the side wall of the vertical groove 5531 near the middle seat 552, and a vertical slider 554 is provided in the vertical groove 5531 for contacting the inclined surfaces on both sides of the lower part of the box beam 6, and the vertical hole is vertically slidably arranged in the vertical groove 5531, and a stopping groove 55311 is provided on the inner wall of the vertical groove 5531, and a stop block 5541 is fixedly connected to the side surface of the vertical slider 554, and the stop block 5541 is slidably set in the stopping groove 55311, and a return spring 5544 is provided in the stopping groove 55311, and one end of the return spring 5544 contacts the bottom surface of the stop block 5541, and the other end of the return spring 5544 contacts the bottom wall of the stopping groove 55311.

[0039] Reference Figure 3 and Figure 4As shown, a transverse rod 555 is provided between each of the end seats 553 and the middle seat 552. The transverse rod 555 is arranged horizontally, with its ends slidingly disposed in the sliding hole 5532 and the through hole 5521, respectively. A first inclined surface 5542 is provided on the bottom surface of the vertical slider 554, which faces toward the middle seat 552. The transverse rod 555 is provided with a second inclined surface 5551 that can mate with the first inclined surface 5542. A third inclined surface 5543 is provided on the top of the vertical slider 554. When the slider 554 is close to the mounting seat 8, the third inclined surface 5543 can interfere with the side surface of the lower portion of the box beam 6.

[0040] Reference Figure 3 and Figure 5 As shown, a trigger assembly 556 is provided on the middle seat 552, and a sliding groove 55211 is provided on the inner wall of the through hole 5521. The trigger assembly 556 includes a sliding block 5561 slidably set in the sliding groove 55211, and a baffle 5562 is fixedly connected to the sliding block 5561. The baffle 5562 is located in the through hole 5521. The sliding block 5561 is a dovetail block, and the sliding groove 55211 is a dovetail groove.

[0041] Reference Figure 3 and Figure 5 As shown, two thrust pieces 5563 are provided in the through hole 5521, and the two thrust pieces 5563 are symmetrically arranged on both sides of the baffle 5562. The thrust pieces 5563 are thrust springs 55631, and one end of the thrust spring 55631 abuts against the side surface of the baffle 5562, and the other end of the thrust spring 55631 abuts against the end surface of the transverse rod 555.

[0042] Reference Figure 3 and Figure 5 As shown, a first fixed contact piece 5564 and a second fixed contact piece 5565 are embedded on the top inner wall of the sliding groove 55211, and a movable contact piece 5567 is embedded on the top surface of the sliding block 5561. A receiving groove 55611 is defined on the top surface of the sliding block 5561, and the movable contact piece 5567 is slidably disposed within the receiving groove 55611. A compression spring 5568 is disposed within the receiving groove 55611. One end of the compression spring 5568 abuts against the side surface of the movable contact piece 5567 near the baffle 5562, and the other end of the compression spring 5568 abuts against the side wall of the receiving groove 55611 near the baffle 5562.

[0043] Reference Figure 2 and Figure 5As shown, the first fixed contact piece 5564 and the second fixed contact piece 5565 are disposed on either side of the movable contact piece 5567. The movable contact piece 5567 and the first fixed contact piece 5564 are positively connected to the electrical circuit of the motor 51, while the movable contact piece 5567 and the second fixed contact piece 5565 are reversely connected to the electrical circuit of the motor 51. When the baffle 5562 drives the sliding block 5561 to slide within the sliding groove 55211, the movable contact piece 5567 can independently contact the first fixed contact piece 5564 or the second fixed contact piece 5565.

[0044] Reference Figure 1 、 Figure 2 and Figure 3 As shown, during installation, the electric circuits of the motor 51 and the trigger assembly 556 are plugged into each other through the male and female power sockets. After the connection and installation, the male and female power sockets are unplugged to facilitate the installation of the control mechanism 55 on the next pier 7.

[0045] The implementation principle of a bridge erection machine for erecting segmented box girders in an embodiment of the present application is as follows: after the winch 2 moves to the top of the box girder 6, the winch 2 lowers the connecting seat 3 through the lifting rope to connect the connecting plate 4 to the box girder 6. After the winch 2 lifts the box girder 6, the winch 2 moves horizontally on the crossbeam 1 to move the box girder 6 to the beam erection area. Then the winch 2 lowers the box girder 6 to gradually approach the mounting seat 8 on the pier 7. When the box girder 6 being hoisted is not aligned with the two sides of the installed box girder 6, the motor 51 can drive the connecting plate 4 to slide relative to the connecting seat 3 through the transmission screw 52, ​​so that the connecting plate 4 drives the box girder 6 being hoisted to move.

[0046] The moving contact piece 5567 and the first fixed contact piece 5564 are positively connected to the electrical circuit of the motor 51 , and the moving contact piece 5567 and the second fixed contact piece 5565 are reversely connected to the electrical circuit of the motor 51 . During the lowering process of the box girder 6, when the box girder 6 approaches the mounting seat 8 on the pier 7, the inclined surfaces on both sides of the lower portion of the box girder 6 can interfere with the vertical slider 554. As the box girder 6 continues to slowly lower, and when the position of the box girder 6 does not deviate, the vertical slider 554 can, through the interference of the first inclined surface 5542 and the second inclined surface 5551, cause the two transverse rods 555 to slide synchronously into the through-hole 5521. At this time, the spring forces of the thrust springs 55631 on both sides of the baffle 5562 are equal, and the baffle 5562 remains in the middle of the through-hole 5521, so that the movable contact piece 5567 remains between the first fixed contact piece 5564 and the second fixed contact piece 5565, and does not contact the first fixed contact piece 5564 or the second fixed contact piece 5565. As a result, the segment circuit of the motor 51 remains disconnected, and the winch 2 drives the box girder 6 directly downward.

[0047] When there is a deviation between the two sides of the box beam 6 being installed and the two sides of the box beam 6 that has been installed, the speed at which the two transverse rods 555 slide into the through hole 5521 will deviate. At this time, the elastic forces of the thrust springs 55631 on both sides of the baffle 5562 are not equal. The baffle 5562 can drive the sliding block 5561 to slide in the sliding groove 55211, so that the moving contact piece 5567 contacts the first fixed contact piece 5564 or the second moving contact piece 5567, so that the motor 51 can drive the transmission screw 52 to automatically adjust the position of the box beam 6 being installed by forward or reverse rotation.

[0048] The above are all preferred embodiments of the present application, and are not intended to limit the scope of protection of the present application. Therefore, any equivalent changes made based on the structure, shape, and principle of the present application should be included in the scope of protection of the present application.

Claims

1. A bridge erection machine for erecting segmental box beams, comprising a hoist (2) arranged on a beam (1), characterized in that: A connecting seat (3) is provided on the hoist rope of the hoist (2); a connecting plate (4) for connecting to a box beam (6) is slidably provided on the connecting seat (3); the connecting plate (4) is detachably connected to the box beam (6); and a driving device (5) for driving the connecting plate (4) to move horizontally is provided on the connecting seat (3).

2. A bridge erection machine for erecting segmental box girders according to claim 1, characterized in that: The driving device (5) comprises an electric motor (51) fixedly connected to the connecting seat (3); a transmission screw (52) is fixedly connected to the output shaft of the electric motor (51); a nut seat (53) is cooperatively mounted on the transmission screw (52); and the nut seat (53) is fixedly connected to the connecting plate (4).

3. The bridge erection machine for erecting segmental box girders according to claim 2, characterized in that: The driving device (5) further comprises a control mechanism (55), the control mechanism (55) comprising a fixing plate (551) fixedly connected to the pier (7), an intermediate seat (552) fixedly connected to the fixing plate (551), a through hole (5521) being provided on a side surface of the intermediate seat (552), end seats (553) being provided on both sides of the intermediate seat (552), and the end seats (553) being fixedly connected to the fixing plate (551), a vertical groove (5531) is provided on the top surface of the end seat (553), a sliding hole (5532) is provided on the side wall of the vertical groove (5531) close to the middle seat (552), and a vertical sliding block (554) is provided in the vertical groove (5531) for contacting the inclined surfaces on both sides of the lower part of the box beam (6), and the vertical hole is vertically slidably provided in the vertical groove (5531). ) and the middle seat (552), a transverse rod (555) is provided between each of the two ends of the transverse rod (555) and is respectively slidably provided in the sliding hole (5532) and the through hole (5521), a first inclined surface (5542) is provided on the bottom surface of the vertical slider (554), and the first inclined surface (5542) faces the direction close to the middle seat (552), and a second inclined surface (5551) that can be fitted with the first inclined surface (5542) is provided on the transverse rod (555), and a thrust piece (5563) for preventing the transverse rod (555) from sliding into the through hole (5521) is provided in the through hole (5521), and a trigger assembly (556) is provided on the middle seat (552), and the trigger assembly (556) is used to control the start of the motor (51) when the two transverse rods (555) do not slide synchronously into the through hole (5521).

4. The bridge erection machine for erecting segmental box girders according to claim 3, characterized in that: A sliding groove (55211) is provided on the inner wall of the through hole (5521), the trigger assembly (556) includes a sliding block (5561) slidingly arranged in the sliding groove (55211), a baffle (5562) is fixedly connected to the sliding block (5561), two thrust members (5563) are provided and symmetrically arranged on both sides of the baffle (5562), a first fixed contact piece (5564) and a second fixed contact piece (5565) are embedded on the inner wall of the sliding groove (55211), the sliding block (5561) is fixedly connected to the baffle (5562), the thrust members (5563) are provided with two thrust members (5563) and symmetrically arranged on both sides of the baffle (5562), the first fixed contact piece (5564) and the second fixed contact piece (5565) are embedded on the inner wall of the sliding groove (55211), the sliding block (5561) is fixedly connected to the baffle (5562), the thrust members (5563) are fixedly connected to ... first fixed contact piece (5564) and the second fixed contact piece (5565) are embedded in the inner wall of the sliding groove (55211), the first fixed contact piece (5564) and the second fixed contact piece (5565) are embedded in the inner wall of the sliding groove (55211), the first fixed contact piece (5 1) A movable contact piece (5567) is embedded in the motor (51) and can contact the first fixed contact piece (5564) and the second fixed contact piece (5565) separately. The first fixed contact piece (5564) and the second fixed contact piece (5565) are arranged on both sides of the movable contact piece (5567). The movable contact piece (5567) and the first fixed contact piece (5564) are connected to the electric circuit of the motor (51) in a positive manner, and the movable contact piece (5567) and the second fixed contact piece (5565) are connected to the electric circuit of the motor (51) in a reverse manner.

5. The bridge erection machine for erecting segmental box girders according to claim 4, characterized in that: The thrust member (5563) is a thrust spring (55631), one end of the thrust spring (55631) abuts against the side surface of the baffle (5562), and the other end of the thrust spring (55631) abuts against the end surface of the transverse rod (555).

6. The bridge erection machine for erecting segmental box girders according to claim 4, characterized in that: A retaining groove (55311) is provided on the inner wall of the vertical groove (5531), and a retaining block (5541) is fixedly connected to the side surface of the vertical sliding block (554), and the retaining block (5541) is slidably disposed in the retaining groove (55311).

7. The bridge erection machine for erecting segmental box girders according to claim 4, characterized in that: A third inclined surface (5543) is provided on the top of the vertical sliding block (554), and the third inclined surface (5543) is used to abut against the side surface of the lower portion of the box beam (6).

8. The bridge erection machine for erecting segmental box girders according to claim 4, characterized in that: The sliding block (5561) is provided with a receiving groove (55611), and the movable contact piece (5567) is slidably arranged in the receiving groove (55611). A compression spring (5568) is arranged in the receiving groove (55611), and one end of the compression spring (5568) abuts against the side of the movable contact piece (5567) close to the baffle (5562), and the other end of the compression spring (5568) abuts against the side wall of the receiving groove (55611) close to the baffle (5562).

9. The bridge erection machine for erecting segmental box girders according to claim 1, characterized in that: A connecting hole (61) is provided on the top surface of the box beam (6), a connecting screw (41) is fixedly connected to the connecting plate (4), the connecting screw (41) is inserted into the connecting hole (61), and the connecting screw (41) passes through the connecting hole (61), a pad (42) is provided on the inner top wall of the box beam (6), the pad (42) is sleeved on the connecting screw (41), a connecting nut (43) is provided below the pad (42), and the connecting nut (43) is threadedly connected to the connecting screw (41).

10. The bridge erection machine for erecting segmental box girders according to claim 1, characterized in that: A slide rail (31) is fixedly connected to the connecting seat (3), a slide block (32) is slidably connected to the slide rail (31), and the slide block (32) is fixedly connected to the connecting plate (4).

Images