Self-propelled liftable and rotatable negative moment tensioning construction device and method

Abstract

The present invention discloses a self-propelled liftable and rotatable negative moment tensioning construction device and method. The device includes: a main traveling trolley and an auxiliary trolley are respectively arranged on both sides of the bridge deck beam body for longitudinal movement along the bridge deck; a main traveling transverse movement mechanism is arranged on the top of the main traveling trolley, and an auxiliary transverse movement mechanism is arranged on the top of the auxiliary trolley; a vertical lifting main arm is arranged outside the main traveling transverse movement mechanism; the lower end of the vertical lifting main arm is connected to one side of the main crossbeam mechanism through a rotating mechanism; a vertical lifting auxiliary arm is arranged outside the auxiliary transverse movement mechanism; one side of the main crossbeam mechanism is fixedly connected to the rotating mechanism, and the other side is cooperatively connected to the clamping mechanism at the lower end of the vertical lifting auxiliary arm; a lifting operation trolley is cooperatively arranged on the main crossbeam mechanism. Each operation link of the present invention is provided with a special operation platform, and the entire operation project is basically automated, ensuring the safety of operators and equipment and eliminating the safety risks of high-altitude operators.

Description

Technical Field

[0001] The present invention belongs to the technical field of bridge prestressed construction, and particularly relates to a self-propelled, liftable and rotatable negative moment tensioning construction device and method. Background Art

[0002] With the rapid development of national infrastructure construction, new requirements and high standards have been put forward for quality management and safety management in construction production, and new requirements have also been proposed for project management. Technical innovation activities such as refined management and minor modifications are to be dissatisfied with the status quo during the construction process, to deeply explore, innovate and invent, break the routine, and provide good services for the front line of construction, so as to ensure safety, quality and efficiency in a safer, more scientific and more efficient manner.

[0003] During the bridge construction process, the prestressed process in the beam body becomes the skeleton of the beam, an important part of the beam body structure, an important basis for achieving a large span of the beam body, and an important guarantee for ensuring the safety of vehicles, pedestrians and property. After the beam body is erected, the negative moment construction becomes the biggest safety risk point. The operation space under the beam is narrow, and the operation equipment is heavy. Each time a construction is carried out, the operation personnel and equipment need to be transferred once, which is time-consuming and laborious, and the efficiency is low. Especially in terms of safety, since most bridges are high piers and large spans, located in high mountains and deep valleys, the operation surface is more than twenty or thirty meters above the ground, and up to more than sixty meters at the highest. The cost of building a support from under the bridge is too high. Setting up a cage from the bridge deck is limited by the width of the wet joint of 55 cm, and various existing cage equipment cannot be set up, with extremely high safety risk hazards. High-altitude operations pose high-risk hazard points for both people and objects. Summary of the Invention

[0004] In view of this, the main purpose of the present invention is to provide a self-propelled, liftable and rotatable negative moment tensioning construction device and method.

[0005] To achieve the above object, the technical solution of the present invention is realized as follows:

[0006] The embodiment of the present invention provides a self-propelled, liftable and rotatable negative moment tensioning construction device, which includes a main traveling trolley, an auxiliary trolley, a main traveling transverse movement mechanism, a vertical lifting main arm, a rotating mechanism, an auxiliary transverse movement mechanism, a clamping mechanism, a vertical lifting auxiliary arm, a main crossbeam mechanism, and a lifting operation trolley;

[0007] The main traveling trolley and the auxiliary trolley are respectively arranged on both sides of the bridge deck beam body for longitudinal movement along the bridge deck;

[0008] The main traveling transverse movement mechanism is arranged on the top of the main traveling trolley, and the auxiliary transverse movement mechanism is arranged on the top of the auxiliary trolley for adjusting the width between the vertical lifting main arm and the vertical lifting auxiliary arm and the beam body;

[0009] The vertical lifting main arm is arranged outside the main transverse moving mechanism and is used to adjust the height of the main beam mechanism;

[0010] The lower end of the vertical lifting main arm is connected to one side of the main beam mechanism through a rotating mechanism and is used to adjust the rotating position of the main beam mechanism;

[0011] The vertical lifting auxiliary arm is arranged outside the auxiliary transverse moving mechanism and is used to adjust the height of the main beam mechanism;

[0012] One side of the main beam mechanism is fixedly connected to the rotating mechanism, and the other side is cooperatively connected to the clamping mechanism at the lower end of the vertical lifting auxiliary arm, and is used to provide an operation platform for the lifting operation trolley;

[0013] The lifting operation trolley is cooperatively arranged on the main beam mechanism and is used to perform negative moment tensioning operations on the bridge deck girder.

[0014] In the above solution, a main vehicle drive mechanism is arranged at the bottom of the main traveling trolley, a main vehicle counterweight block is arranged on one side of the main traveling trolley close to the inner side for maintaining the balance of the entire device, a main vehicle controller is arranged on the main traveling trolley, and the main vehicle controller is respectively connected to the main transverse moving mechanism, the vertical lifting main arm, the rotating mechanism, and the main vehicle drive mechanism for adjusting their working states.

[0015] In the above solution, an auxiliary vehicle drive mechanism is arranged at the bottom of the auxiliary trolley, an auxiliary vehicle counterweight block is arranged on one side of the auxiliary trolley close to the inner side for maintaining the balance of the entire device, an auxiliary vehicle controller is arranged on the auxiliary trolley, and the auxiliary vehicle controller is respectively connected to the auxiliary transverse moving mechanism, the vertical lifting auxiliary arm, and the auxiliary vehicle controller for adjusting their working states.

[0016] In the above solution, the main beam mechanism includes a steel casing, a main beam, a main beam auxiliary arm, and a telescopic drive mechanism. The steel casing is sleeved outside the main beam and the two are cooperatively connected for the main beam to move in the steel casing. The steel casing is fixedly connected to the rotating mechanism. One side of the main beam auxiliary arm is arranged on one side of the main beam close to the vertical lifting auxiliary arm and is cooperatively connected to the main beam through a telescopic drive mechanism. The other side of the main beam auxiliary arm is cooperatively connected to the clamping mechanism.

[0017] In the above solution, the telescopic drive mechanism includes a second drive motor, a positioning sleeve box, and a first transmission rack. The first transmission rack is arranged on the main beam auxiliary arm. The positioning sleeve box is arranged on the lower side of the main beam. The main beam auxiliary arm passes through the positioning sleeve box. A second drive motor is correspondingly arranged at the position where the positioning sleeve box has a notch. The gear on the second drive motor meshes with the first transmission rack for telescoping the main beam.

[0018] In the above solution, the rotation mechanism includes a crossbeam connecting main shaft, a first driving motor, a main shaft gear, and a connecting flange. The upper end of the crossbeam connecting main shaft is movably connected to the bottom of the vertical lifting main arm, and the lower end is fixedly connected to the connecting flange. The connecting flange is fixedly connected to the steel casing. Two first driving motors are arranged on both sides of the crossbeam connecting main shaft respectively. The main shaft gear is sleeved on the crossbeam connecting main shaft. Driving gears are respectively arranged at the output ends of the two first driving motors, and both driving gears are meshed with the main shaft gear to drive the crossbeam connecting main shaft to rotate.

[0019] In the above solution, the clamping mechanism includes a hydraulic cylinder, a main clamping rod, a connecting rod member, and a rolling pulley. The upper end of the main clamping rod is connected to the vertical lifting auxiliary arm. The output end of the hydraulic cylinder is hinged to the central position of the connecting rod member. Both sides of the connecting rod member are respectively hinged to both sides of the main clamping rod. Rolling pulleys are respectively arranged on the inner sides of the lower part of the main clamping rod, and the two rolling pulleys are used to clamp the other side of the main crossbeam auxiliary arm.

[0020] The embodiment of the present invention also provides a negative moment tensioning operation method for a self-propelled liftable and rotatable negative moment tensioning construction device as described in any one of the above solutions, which is characterized in that the method is realized through the following steps:

[0021] Step 1: Control the main traveling trolley and the auxiliary trolley to travel to the operation area and stop. The main traveling trolley and the auxiliary trolley are respectively located on both sides of the bridge deck.

[0022] Step 2: Through the main traveling transverse movement mechanism and the auxiliary transverse movement mechanism on the tops of the main traveling trolley and the auxiliary trolley, gradually move the main crossbeam towards the outside of the beam body. After moving in place, lock it.

[0023] Step 3: Lower the main crossbeam to the working height through the vertical lifting main arm and the vertical lifting auxiliary arm. After lowering in place, lock it.

[0024] Step 4: Rotate through the rotation mechanism to make the main crossbeam rotate 90 degrees to form a perpendicular relationship with the beam body.

[0025] Step 5: After the main crossbeam rotates in place, the main crossbeam auxiliary arm continues to extend forward to the other side of the bridge deck. The clamping mechanism at the lower end of the vertical lifting auxiliary arm of the auxiliary trolley clamps, tightens, and lifts it.

[0026] Step 6: The main crossbeam continues to elongate until the entire main crossbeam is located below the beam surface.

[0027] Step 7: Stop after the lifting operation trolley moves to directly below the operation surface and rise to the operation surface.

[0028] Step 8: The lifting operation trolley performs negative moment tensioning operation.

[0029] Step 9: After the tensioning of the negative bending moment in the same row is completed, the main traveling trolley and the auxiliary trolley move to the next row simultaneously and continue the construction.

[0030] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0031] 1. The construction is safe and reliable. The present invention is a systematic negative bending moment tensioning operation device, and special operation platforms are provided for each operation link. The entire operation project is basically automated, ensuring the safety of operators and equipment, and eliminating the safety risks of high-altitude operators.

[0032] 2. The operation efficiency is improved. The present invention is an automated device that can move by itself, lift, and rotate. From the lateral movement of personnel and tensioning equipment to the forward and backward movement of the whole vehicle, automation can be achieved, greatly reducing the time consumption of personnel and equipment transfer. When constructing with a manual hanging basket during tensioning operations, it is necessary to transfer 15 times per span, while the present invention only needs to move 3 times to complete the tensioning operation of the whole span.

[0033] 3. The degree of automation is high. The present invention adopts hydraulic equipment and electric equipment in many places and is controlled and operated by the main control host, with simple operation and easy to learn and understand. Description of the Drawings

[0034] The drawings described herein are used to disclose a further understanding of the present invention, form a part of the present invention, and the schematic embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation to the present invention. In the drawings:

[0035] Figure 1 is a schematic structural diagram of a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention;

[0036] Figure 2 is a schematic structural diagram of a rotating mechanism in a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention;

[0037] Figure 3 is a schematic structural diagram of a sliding mechanism in a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention;

[0038] Figure 4 is a schematic structural diagram of a clamping mechanism in a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention;

[0039] Figure 5 is a schematic structural diagram of a main beam mechanism in a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention;

[0040] Figure 6 is a side view of the main traveling trolley side of a self-propelled, liftable, and rotatable negative bending moment tensioning construction device according to an embodiment of the present invention before operation;

[0041] Figure 7 This is a schematic structural diagram of the state of step 1 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0042] Figure 8 This is a schematic structural diagram of the state of step 3 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0043] Figure 9 This is a schematic structural diagram of the state of step 4 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0044] Figure 10 This is a schematic structural diagram of the state of step 5 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0045] Figure 11 This is a schematic structural diagram of the state of step 6 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0046] Figure 12 This is a schematic structural diagram of the state of step 7 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention;

[0047] Figure 13 This is a schematic structural diagram of the state of step 8 in the negative moment tensioning operation method of a self-propelled liftable and rotatable negative moment tensioning construction device provided by an embodiment of the present invention. Detailed implementation manners

[0048] In order to make the objectives, technical solutions and advantages of the present invention clearer and more understandable, the present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0049] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components; in the description of the present invention, it should be understood that the orientation or positional relationship indicated by terms such as "upper", "lower", "left", "right", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. This is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, the terms describing the positional relationship in the accompanying drawings are only for illustrative purposes and should not be construed as a limitation of this patent. For those of ordinary skill in the art, the specific meanings of the above terms can be understood according to specific circumstances.

[0050] It should be noted that in this article, the term "comprising", "including" or any other variant thereof is intended to cover non-exclusive inclusion, so that a process, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, article or device. Without further limitation, an element defined by the phrase "comprising a..." does not exclude the existence of additional identical elements in the process, article or device including that element.

[0051] An embodiment of the present invention provides a self-propelled, liftable and rotatable negative moment tensioning construction device, as Figures 1-6 shown. The device includes a main traveling trolley, an auxiliary trolley, a main traveling transverse movement mechanism 2, a vertical lifting main arm 4, a rotating mechanism 7, an auxiliary transverse movement mechanism 15, a clamping mechanism 12, a vertical lifting auxiliary arm 13, a main crossbeam mechanism, and a lifting operation trolley 10;

[0052] The main traveling trolley and the auxiliary trolley are respectively arranged on both sides of the bridge deck beam body for longitudinal movement along the bridge deck;

[0053] The main traveling transverse movement mechanism 2 is arranged on the top of the main traveling trolley, and the auxiliary transverse movement mechanism 15 is arranged on the top of the auxiliary trolley for adjusting the width between the vertical lifting main arm 4 and the vertical lifting auxiliary arm 13 and the beam body;

[0054] The vertical lifting main arm 4 is arranged outside the main traveling transverse movement mechanism 2 for adjusting the height of the main crossbeam mechanism;

[0055] The lower end of the vertical lifting main arm 4 is connected to one side of the main crossbeam mechanism through a rotating mechanism 7 for adjusting the rotating position of the main crossbeam mechanism;

[0056] The vertical lifting auxiliary arm 13 is arranged outside the auxiliary transverse movement mechanism 15 for adjusting the height of the main crossbeam mechanism;

[0057] One side of the main beam mechanism is fixedly connected to the rotating mechanism 7, and the other side is cooperatively connected to the clamping mechanism 12 at the lower end of the vertical lifting auxiliary arm 13, which is used to provide an operating platform for the lifting operation trolley 10;

[0058] The lifting operation trolley 10 is cooperatively arranged on the main beam mechanism and is used for performing negative moment tensioning operations on the bridge deck beam.

[0059] Before the operation, the main beam mechanism is not connected to the clamping mechanism 12 at the lower end of the vertical lifting auxiliary arm 13, and as Figure 11 shown, when the main transverse movement mechanism 2 extends, the main beam mechanism is parallel to the longitudinal direction of the bridge deck beam, which is convenient for quickly moving to the operation area.

[0060] During the preparatory work before the operation, the vertical lifting auxiliary arm 13 first lowers the main beam mechanism to the operation height, and then under the action of the rotating mechanism 7, the main beam mechanism rotates it by 90 degrees. After that, the other side of the main beam mechanism is connected to the clamping mechanism 12 at the lower end of the vertical lifting auxiliary arm 13. Finally, the main beam mechanism moves towards the vertical lifting auxiliary arm 13, so that the bridge deck beam spans above the main beam mechanism.

[0061] During the operation, the lifting operation trolley 10 rises to the operation surface. A jack placement platform is arranged on the lifting operation trolley 10, and the platform can slide in four directions, allowing the jack to be correctly threaded with the steel strands and completing the tensioning operation.

[0062] A safety rope 5 is wound around the vertical lifting main arm 4, and a ladder 6 for personnel to climb is arranged on the outside.

[0063] A main vehicle drive mechanism 19 is arranged at the bottom of the main traveling vehicle. A main vehicle counterweight 20 is arranged on one side of the main traveling vehicle close to the inside to maintain the balance of the entire device. A main vehicle controller 1 is arranged on the main traveling vehicle. The main vehicle controller 1 is respectively connected to the main transverse movement mechanism 2, the vertical lifting main arm 4, the rotating mechanism 7, and the main vehicle drive mechanism 19 for adjusting its working state.

[0064] An auxiliary vehicle drive mechanism 18 is arranged at the bottom of the auxiliary vehicle. An auxiliary vehicle counterweight 17 is arranged on one side of the auxiliary vehicle close to the inside to maintain the balance of the entire device. An auxiliary vehicle controller 16 is arranged on the auxiliary vehicle. The auxiliary vehicle controller 16 is respectively connected to the auxiliary transverse movement mechanism 15, the vertical lifting auxiliary arm 13, and the auxiliary vehicle controller 16 for adjusting its working state.

[0065] The main beam mechanism includes a steel casing 8, a main beam 9, a secondary arm 11 of the main beam, and a telescopic drive mechanism. The steel casing 8 is sleeved outside the main beam 9 and the two are cooperatively connected for the main beam 9 to move within the steel casing 8. The steel casing 8 is fixedly connected to the rotating mechanism 7. One side of the secondary arm 11 of the main beam is disposed on the side of the main beam 9 close to the vertical lifting secondary arm 13 and is cooperatively connected to the main beam 9 through the telescopic drive mechanism. The other side of the secondary arm 11 of the main beam is cooperatively connected to the clamping mechanism 12.

[0066] Before operation, generally, the central position of the main beam 9 is moved to the steel casing 8, so that the center of gravity of the entire device can be kept stable.

[0067] During operation preparation, after descending to an appropriate height, the secondary arm 11 of the main beam is extended to the clamping mechanism 12 through the telescopic drive mechanism. Under the clamping action of the clamping mechanism 12, the entire main beam 9 is gradually moved towards the vertical lifting secondary arm 13 through the telescopic drive mechanism. Finally, the steel casing 8 is basically on the left and right sides of the main beam 9.

[0068] The telescopic drive mechanism includes a second drive motor 111, a positioning casing 112, and a first transmission rack 113. The first transmission rack 113 is disposed on the secondary arm 11 of the main beam. The positioning casing 112 is disposed on the lower side of the main beam 9. The secondary arm 11 of the main beam penetrates through the positioning casing 112. The second drive motor 111 is correspondingly disposed at the position where the positioning casing 112 has a notch. The gear on the second drive motor 111 meshes with the first transmission rack 113 for telescoping the main beam 9.

[0069] The steel casing 8 is cooperatively connected to the main beam 9 through a sliding mechanism.

[0070] The sliding mechanism includes a third drive motor 81 and a second transmission rack 82. The second transmission rack 82 is disposed on the upper side of the main beam 9. The third drive motor 81 is disposed on the steel casing 8 and the gear at the output end meshes with the second transmission rack 82.

[0071] When the secondary arm 11 of the main beam is not clamped by the clamping mechanism 12, the second drive motor 111 rotates clockwise. With the cooperation of the first transmission rack 113, the secondary arm 11 of the main beam extends outwards, making it penetrate through the clamping mechanism 12. Then, the clamping mechanism 12 clamps a part of it, making it unable to move up and down. At this time, the telescopic mechanism between the steel casing 8 and the main beam 9 acts to move the main beam 9 towards the vertical lifting secondary arm 13. After moving in place, the second drive motor 111 rotates counterclockwise to retract the extra secondary arm 11 of the main beam.

[0072] The rotation mechanism 7 includes a crossbeam connecting main shaft 71, a first driving motor 72, a main shaft gear 73, and a connecting flange 74. The upper end of the crossbeam connecting main shaft 71 is movably connected to the bottom of the vertical lifting main arm 4, and the lower end is fixedly connected to the connecting flange 74. The connecting flange 74 is fixedly connected to the steel casing 8. Two first driving motors 72 are provided on both sides of the crossbeam connecting main shaft 71. A main shaft gear 73 is sleeved on the crossbeam connecting main shaft 71. Driving gears are respectively arranged at the output ends of the two first driving motors 72, and both driving gears are meshed with the main shaft gear 73 for driving the crossbeam connecting main shaft 71 to rotate.

[0073] The clamping mechanism 12 includes a hydraulic cylinder 121, a main clamping rod 122, a connecting rod member 123, and a rolling pulley 124. The upper end of the main clamping rod 122 is connected to the vertical lifting auxiliary arm 13. The output end of the hydraulic cylinder 121 is hinged to the central position of the connecting rod member 123. Both sides of the connecting rod member 123 are respectively hinged to both sides of the main clamping rod 122. Rolling pulleys 124 are respectively arranged on the inner sides of the lower parts of the main clamping rods 122, and the two rolling pulleys 124 are used for clamping the other side of the main crossbeam auxiliary arm 11.

[0074] The embodiment of the present invention further provides a negative moment tensioning operation method for a self-propelled liftable and rotatable negative moment tensioning construction device. This method is realized through the following steps:

[0075] As Figure 7 shown, step 1: Control the main traveling trolley and the auxiliary trolley to travel to the operation area and stop. The main traveling trolley and the auxiliary trolley are respectively located on both sides of the bridge deck;

[0076] As Figure 8 shown, step 2: Through the main traveling transverse movement mechanism 2 and the auxiliary transverse movement mechanism 15 at the tops of the main traveling trolley and the auxiliary trolley, gradually move the main crossbeam 9 towards the outside of the beam body, and lock it after traveling in place;

[0077] As Figure 9 shown, step 3: Lower the main crossbeam 9 to the working height through the vertical lifting main arm 4 and the vertical lifting auxiliary arm 13, and lock it after lowering in place;

[0078] As Figure 10 shown, step 4: Rotate through the rotation mechanism 7 to rotate the main crossbeam 9 by 90 degrees to form a perpendicular relationship with the beam body;

[0079] As Figure 11 shown, step 5: After the main crossbeam 9 rotates in place, the main crossbeam auxiliary arm 11 continues to extend forward to the other side of the bridge deck, and the clamping mechanism 12 at the lower end of the vertical lifting auxiliary arm 13 of the auxiliary trolley clamps, tightens, and lifts it;

[0080] AsFigure 12 As shown, step 6: The main crossbeam 9 continues to extend until the entire main crossbeam is located below the beam surface;

[0081] As Figure 13 shown, step 7: The lifting operation trolley 10 moves to a position directly below the working surface and then stops, and rises to the working surface;

[0082] Step 8: The lifting operation trolley 10 performs negative moment tensioning operation;

[0083] Step 9: After the negative moment tensioning of the same row is completed, the main traveling trolley and the auxiliary trolley simultaneously move to the next row position and continue the construction.

[0084] The above is only a preferred embodiment of the present invention and is not intended to limit the protection scope of the present invention.

Claims

1. A self-propelled, liftable and rotatable negative moment tensioning construction device, characterized in that The device includes a main traveling trolley, an auxiliary trolley, a main traveling transverse movement mechanism, a vertical lifting main arm, a rotating mechanism, an auxiliary transverse movement mechanism, a clamping mechanism, a vertical lifting auxiliary arm, a main crossbeam mechanism, and a lifting operation trolley. The main traveling trolley and the auxiliary trolley are respectively arranged on both sides of the bridge deck beam body and are used for longitudinal movement along the bridge deck. The main traveling transverse movement mechanism is arranged on the top of the main traveling trolley, and the auxiliary transverse movement mechanism is arranged on the top of the auxiliary trolley and is used to adjust the width between the vertical lifting main arm and the vertical lifting auxiliary arm and the beam body. The vertical lifting main arm is arranged outside the main traveling transverse movement mechanism and is used to adjust the height of the main crossbeam mechanism. The lower end of the vertical lifting main arm is connected to one side of the main crossbeam mechanism through a rotating mechanism and is used to adjust the rotating position of the main crossbeam mechanism. The vertical lifting auxiliary arm is arranged outside the auxiliary transverse movement mechanism and is used to adjust the height of the main crossbeam mechanism. One side of the main crossbeam mechanism is fixedly connected to the rotating mechanism, and the other side is cooperatively connected to the clamping mechanism at the lower end of the vertical lifting auxiliary arm and is used to provide an operation platform for the lifting operation trolley. The lifting operation trolley is cooperatively arranged on the main crossbeam mechanism and is used for negative moment tensioning operation on the bridge deck beam body. The main crossbeam mechanism includes a steel casing. The rotating mechanism includes a crossbeam connecting main shaft, a first driving motor, a main shaft gear, and a connecting flange. The upper end of the crossbeam connecting main shaft is movably connected to the bottom of the vertical lifting main arm, and the lower end is fixedly connected to the connecting flange. The connecting flange is fixedly connected to the steel casing. Two first driving motors are respectively arranged on both sides of the crossbeam connecting main shaft. The main shaft gear is sleeved on the crossbeam connecting main shaft. The output ends of the two first driving motors are respectively provided with driving gears, and both driving gears are meshed with the main shaft gear and are used to drive the crossbeam connecting main shaft to rotate.

2. The self-propelled liftable and rotatable negative moment tensioning construction device according to claim 1, characterized in that, The bottom of the main traveling trolley is provided with a main vehicle driving mechanism. A main vehicle counterweight block is arranged on the inner side of the main traveling trolley close to it to maintain the balance of the entire device. A main vehicle controller is arranged on the main traveling trolley. The main vehicle controller is respectively connected to the main traveling transverse movement mechanism, the vertical lifting main arm, the rotating mechanism, and the main vehicle driving mechanism and is used to adjust their working states.

3. The self-propelled liftable and rotatable negative moment tensioning construction device according to claim 1, characterized in that, The bottom of the auxiliary trolley is provided with an auxiliary vehicle driving mechanism. An auxiliary vehicle counterweight block is arranged on the inner side of the auxiliary trolley close to it to maintain the balance of the entire device. An auxiliary vehicle controller is arranged on the auxiliary trolley. The auxiliary vehicle controller is respectively connected to the auxiliary transverse movement mechanism, the vertical lifting auxiliary arm, and the auxiliary vehicle controller and is used to adjust their working states.

4. The self-propelled liftable and rotatable negative moment tensioning construction device according to claim 3, characterized in that, The main crossbeam mechanism further includes a main crossbeam, a main crossbeam auxiliary arm, and a telescopic driving mechanism. The steel casing is sleeved outside the main crossbeam and the two are cooperatively connected and are used for the main crossbeam to move in the steel casing. The steel casing is fixedly connected to the rotating mechanism. One side of the main crossbeam auxiliary arm is arranged on the side of the main crossbeam close to the vertical lifting auxiliary arm and is cooperatively connected to the main crossbeam through the telescopic driving mechanism. The other side of the main crossbeam auxiliary arm is cooperatively connected to the clamping mechanism.

5. The self-propelled liftable and rotatable negative moment tensioning construction device according to claim 4, wherein, The telescopic driving mechanism includes a second driving motor, a positioning sleeve box, and a first transmission rack. The first transmission rack is arranged on the auxiliary arm of the main cross beam. The positioning sleeve box is arranged on the lower side of the main cross beam. The auxiliary arm of the main cross beam penetrates through the positioning sleeve box. The second driving motor is arranged corresponding to the position where the positioning sleeve box has a notch. The gear on the second driving motor meshes with the first transmission rack to drive the auxiliary arm of the main cross beam.

6. The self-propelled liftable and rotatable negative moment tensioning construction device according to claim 5, wherein The clamping mechanism includes a hydraulic cylinder, a main clamping rod, a connecting rod member, and a rolling pulley. The upper end of the main clamping rod is connected to the vertical lifting auxiliary arm. The output end of the hydraulic cylinder is hinged to the central position of the connecting rod member. The two sides of the connecting rod member are respectively hinged to the two sides of the main clamping rod. Rolling pulleys are respectively arranged on the inner sides of the lower parts of the main clamping rods. The two rolling pulleys are used to clamp the other side of the auxiliary arm of the main cross beam.

7. A method for negative moment tensioning operation of a self-propelled liftable and rotatable negative moment tensioning construction device as described in any one of claims 1-6, characterized in that, This method is realized through the following steps: Step 1: Control the main traveling trolley and the auxiliary trolley to travel to the operation area and stop. The main traveling trolley and the auxiliary trolley are respectively located on both sides of the bridge deck. Step 2: Through the main transverse movement mechanism and the auxiliary transverse movement mechanism on the tops of the main traveling trolley and the auxiliary trolley, gradually move the main cross beam towards the outside of the beam body. After moving in place, lock it. Step 3: Lower the main cross beam to the working height through the vertical lifting main arm and the vertical lifting auxiliary arm. After lowering in place, lock it. Step 4: Rotate through the rotation mechanism to make the main cross beam rotate 90 degrees to form a perpendicular relationship with the beam body. Step 5: After the main cross beam rotates in place, the auxiliary arm of the main cross beam continues to extend forward until it reaches the other side of the bridge deck. The clamping mechanism at the lower end of the vertical lifting auxiliary arm of the auxiliary trolley clamps, tightens, and lifts it. Step 6: The main cross beam continues to extend until the entire main cross beam is located below the beam surface. Step 7: The lifting operation trolley moves to directly below the operation surface and then stops and rises to the operation surface. Step 8: The lifting operation trolley performs the negative moment tensioning operation. Step 9: After the negative moment tensioning of the same row is completed, the main traveling trolley and the auxiliary trolley simultaneously travel to the next row position to continue the construction.

Images