Large-span old bridge splicing operation trolley

Abstract

The invention relates to the technical field of bridge construction, in particular to a large-span old bridge splicing operation trolley which comprises a first stand column, a second stand column, a hanging basket, a stair, a long rod, a limiting block, a cylinder and a nut. One end of the crane is fixedly connected with a first stand column. A second stand column is fixedly connected to the middle of the crane. The lower ends of the upright I and the upright II are fixedly connected with a hanging basket; the second stand column is fixedly connected with a stair. A long rod penetrates through the other end of the travelling crane; the lower end of the long rod is fixedly connected with a plurality of limiting blocks; the hanging basket is fixedly connected with a cylinder, and the cylinder is aligned with the long rod; during construction, only a crane needs to be used for installing the operation trolley in the initial stage, the operation trolley can move along the gap between the two bridge bodies, and therefore the operation trolley is matched with manual work to complete pouring operation on the gap, and the crane does not need to participate in the pouring process; the problems that in the prior art, due to the fact that crane construction is adopted, precision is poor, and construction is difficult in special environments such as crossing water, crossing roads and crossing valleys are solved.

Description

Technical Field

[0001] The present invention relates to the technical field of bridge construction, and more particularly to a trolley for splicing old bridges of large-span bridges. Background Art

[0002] During the splicing and construction of old bridges, the hanging formwork construction method is usually used. The specific steps are to first place the formwork on the ground, then use equipment such as wire ropes and winches to lift it and install it at the designated construction location. However, the lifting operation itself carries high safety risks, especially when operating at high altitudes or in complex environments, where accidents are prone to occur. At the same time, due to various uncertainties in the lifting process (such as wind force and equipment stability), the precise installation of the formwork becomes difficult, which may lead to structural deviations. At the same time, traditional hanging formwork construction requires sufficient ground space to place and adjust the formwork, which makes this method difficult to implement in special environments such as crossing water, crossing roads, and crossing valleys.

[0003] An existing Chinese patent proposes a prefabricated bridge diaphragm and wet joint installation trolley (publication number: CN119041307A). It uses a hanging basket and a driving mechanism to assist manual bridge splicing construction. However, when standing on the hanging basket, workers can only extend their upper body to the side of the basket to perform construction operations, which poses a huge safety hazard and greatly increases the difficulty of manual construction.

[0004] In summary, the present application proposes a trolley for splicing old bridges with large spans to improve the technical problems mentioned above. Summary of the Invention

[0005] In order to overcome the disadvantage of the existing technology that during construction, workers can only stick their upper bodies out to the side of the hanging basket to perform construction operations, which poses a great safety hazard, the present invention provides a large-span old bridge splicing operation trolley.

[0006] The technical solution of the present invention is:

[0007] The trolley for splicing an old bridge of a large span bridge comprises a track and a trolley; two tracks are provided; a trolley is provided on both tracks and moves along the track; the trolley also comprises a first column, a second column, a hanging basket, stairs, a long pole, a limit block, a cylinder and a nut; one end of the trolley is fixedly connected to the first column; the middle part of the trolley is fixedly connected to the second column; the lower ends of the first column and the second column are fixedly connected to the hanging basket; the hanging basket is divided into a casting construction area and a material placement area; the stairs are fixedly connected to the second column; a long pole is passed through the other end of the trolley; a plurality of limit blocks are fixedly connected to the lower end of the long pole; a cylinder is fixedly connected to the hanging basket, and the cylinder is aligned with the long pole; a plurality of through grooves are provided on the cylinder; a plurality of grooves are provided on the cylinder; the lower end of the long pole is inserted into the inner side of the cylinder; the limit blocks are located in the corresponding grooves, and the upper side of the limit blocks rests against the top of the groove; a nut is screwed on the upper end of the long pole, and the lower side of the nut is in contact with the trolley.

[0008] Furthermore, in the above-mentioned large-span bridge old bridge splicing operation trolley, a plurality of convex strips are provided on the surface of the stairs.

[0009] Furthermore, in the above-mentioned large-span bridge old bridge splicing operation trolley, chamfers are provided on the inner upper part and the inner lower part of the cylinder.

[0010] Furthermore, the above-mentioned large-span bridge old bridge splicing operation trolley also includes an auxiliary component, which includes an elastic telescopic rod and a connecting block; the elastic telescopic rod is fixedly connected to the inner side of the cylinder; the telescopic end of the elastic telescopic rod is fixedly connected to the connecting block, and the upper side of the connecting block is in contact with the long rod.

[0011] Furthermore, the above-mentioned large-span bridge old bridge splicing operation trolley also includes a steel ball; the steel ball is rotatably connected to the lower end of the long rod.

[0012] Furthermore, in the above-mentioned large-span bridge old bridge splicing operation trolley, the steel balls are set to be made of smooth material.

[0013] Furthermore, in the above-mentioned large-span bridge old bridge splicing operation trolley, the lower side surfaces of the long rod and the limit block are both set to be inclined upward curved surfaces.

[0014] Furthermore, the above-mentioned large-span bridge old bridge splicing operation trolley also includes a buffer assembly, which includes a movable block and a spring; the movable block is slidably connected to the carriage; and a number of springs are fixedly connected between the movable block and the carriage.

[0015] Furthermore, the above-mentioned large-span bridge old bridge splicing operation trolley also includes a telescopic support rod; a plurality of telescopic support rods are fixedly connected to the hanging basket.

[0016] Furthermore, in the above-mentioned large-span bridge old bridge splicing operation trolley, a soft rubber pad is provided at the end of the telescopic support rod away from the hanging basket.

[0017] The beneficial effects are:

[0018] First, a crane is only needed to install the work trolley in the initial stage, and the work trolley can move along the gap between the two bridge bodies to cooperate with manual labor to complete the pouring operation in the gap. No crane is required during the pouring process, which avoids the problems of poor precision caused by the use of cranes in existing technologies and the difficulty of construction in special environments such as across water, across roads, and across valleys. At the same time, compared with existing technologies, workers can use a normal standing posture to carry out construction operations in the pouring construction area of the hanging basket without having to lean over. This not only improves safety performance but also reduces the difficulty of manual construction.

[0019] Second, a limit block is set at the bottom of the long pole. During installation, workers only need to stand on the upper side of the bridge body to operate the long pole to complete the installation operation, which greatly reduces safety hazards. At the same time, the elastic telescopic rod and the connecting block cooperate to apply an upward thrust to the long pole and the limit block, so that when manually tightening the nut and aligning the limit block with the groove, there is no need to apply an upward pulling force to the long pole, which helps to reduce the difficulty of manual operation and improve efficiency.

[0020] 3. The long rod can also be used for automatic positioning of the mobile crane, without manual positioning, which is conducive to improving efficiency. At the same time, the steel ball slides on the surface of the concrete block 2 in the form of rolling instead of the long rod, which can avoid scratching the concrete block 2. At the same time, the lower side of the long rod and the limit block are set to an upward curved surface, making it easier for the long rod and the limit block to penetrate the reserved hole of the concrete block 2 to avoid jamming. At the same time, the inertial movement of the crane is buffered by the cooperation of the movable block and the spring, which prevents the crane from bending the long rod and interfering with its installation and alignment operation.

[0021] 4. The telescopic support rod can provide support for the hanging basket, greatly reducing the shaking of the hanging basket, thereby improving the overall stability and facilitating safe construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 A schematic structural diagram of a large-span old bridge splicing operation trolley according to the present invention is shown from a first viewing angle;

[0023] Figure 2 A second perspective structural diagram of the large-span old bridge splicing operation trolley of the present invention is shown;

[0024] Figure 3 It shows a schematic structural diagram of the first column, the second column, the hanging basket and the stairs of the present invention;

[0025] Figure 4 Shows a schematic structural diagram of the long rod of the present invention;

[0026] Figure 5 Shows a schematic structural diagram of the buffer assembly of the present invention;

[0027] Figure 6A schematic structural diagram of the long rod, the limiting block and the cylinder of the present invention is shown;

[0028] Figure 7 Shows a schematic structural diagram of the cylinder of the present invention;

[0029] Figure 8 The present invention is shown Figure 5 Enlarged view of point A in the middle;

[0030] Figure 9 Shows a schematic structural diagram of the steel ball of the present invention;

[0031] Figure 10 Shown is a top view of the hanging basket of the present invention.

[0032] The names and serial numbers of the parts in the figure are: 1-track, 2-crane, 3-column 1, 4-column 2, 5-hanging basket, 6-stairs, 7-long pole, 8-limiting block, 9-cylinder, 10-nut, 11-bridge body, 12-concrete block 1, 13-concrete block 2, 201-elastic telescopic rod, 202-connecting block, 203-steel ball, 204-movable block, 205-spring, 206-telescopic support rod, 91-through slot, 92-groove, 93-casting construction area, 94-material placement area. DETAILED DESCRIPTION

[0033] The preferred technical solutions of the present invention will be described in detail below with reference to the accompanying drawings.

[0034] Example 1

[0035] A large span bridge old bridge splicing operation trolley, such as Figures 1-8 and Figure 10 As shown, it includes a track 1 and a trolley 2; there are two tracks 1, and the track 1 is made of metal; the trolley 2 is commonly provided on the two tracks 1, and the trolley 2 moves along the track 1; it also includes a column 1 3, a column 2 4, a hanging basket 5, a staircase 6, a long rod 7, a limit block 8, a cylinder 9 and a nut 10; one end of the trolley 2 is bolted to the column 1 3, and the column 1 3 is made of metal; the middle part of the trolley 2 is bolted to the column 2 4; the lower ends of the columns 1 3 and 2 4 are commonly bolted to the hanging basket 5; the hanging basket 5 is divided into a pouring construction area 93 and Material placement area 94; a staircase 6 is bolted to the second column 4; a long rod 7 is passed through the other end of the crane 2; two limit blocks 8 are welded to the lower end of the long rod 7; a cylinder 9 is bolted to the hanging basket 5, and the cylinder 9 is aligned with the long rod 7; two through grooves 91 are provided on the cylinder 9; two grooves 92 are provided on the cylinder 9; the lower end of the long rod 7 is inserted into the inner side of the cylinder 9; the limit block 8 is located in the corresponding groove 92, and the upper side of the limit block 8 rests on the top of the groove 92; a nut 10 is screwed on the upper end of the long rod 7, and the lower side of the nut 10 is in contact with the crane 2.

[0036] The surface of the staircase 6 is provided with a plurality of convex strips, which can provide an anti-slip effect when a person manually climbs on the staircase 6 .

[0037] The upper inner portion and the lower inner portion of the cylinder 9 are both provided with chamfers, so that the long rod 7 is more easily inserted into the cylinder 9 .

[0038] It also includes an auxiliary component, which includes an elastic telescopic rod 201 and a connecting block 202; the elastic telescopic rod 201 is bolted to the inner side of the cylinder 9; the telescopic end of the elastic telescopic rod 201 is fixedly connected to the connecting block 202, and the upper side of the connecting block 202 is in contact with the long rod 7. The elastic telescopic rod 201 and the connecting block 202 cooperate to support the long rod 7.

[0039] First, a concrete block 12 is manually poured at the leftmost end of the gap between the two bridge bodies 11 using conventional construction techniques, and a reserved hole is set on the right side of the concrete block 12. Then, two tracks 1 are manually built on the two bridge bodies 11, and the trolley 2 is placed on the two tracks 1. Then, the hanging basket 5 and the parts thereon are transported to the bottom of the gap between the two bridge bodies 11 by a crane or a hoist. Then, the upper ends of the columns 1 3 and 2 4 are manually fixed on the trolley 2, and the lower ends of the columns 1 3 and 2 4 are fixed on the hanging basket 5. Then, the crane or hoist is evacuated. At this time, Figure 3 As shown, the hanging basket 5 and the parts thereon are hung on the traveling crane 2 through the column 1 3 and the column 2 4. Then, a person stands on the upper side of the bridge body 11 and drives the long rod 7 to move downward, so that the lower end of the long rod 7 passes through the reserved holes on the traveling crane 2 and the concrete block 1 12 in turn, and then the lower end of the long rod 7 is inserted into the upper inner part of the cylinder 9. The long rod 7 drives the limit block 8 to be inserted into the through groove 91, and the limit block 8 moves to the bottom of the through groove 91. Then, the long rod 7 is manually driven to rotate ninety degrees, and the long rod 7 drives the limit block 8 to rotate ninety degrees, so that the limit block 8 moves to the bottom of the groove 92. Then, the long rod 7 is manually driven to move upward, and the long rod 7 drives the limit block 8 to move upward, so that the limit block 8 moves to the upper end of the groove 92 , then manually screw the nut 10 downward until the lower side of the nut 10 contacts the traveling crane 2. At this time, the left end of the hanging basket 5 is fixed to the traveling crane 2 through the cooperation of the long rod 7, the limit block 8, the cylinder 9 and the nut 10. Then, manually climb from the bridge body 11 to the hanging basket 5 through the stairs 6, and transport the tools and templates to the material placement area 94 of the hanging basket 5. Then, manually stand in the pouring construction area 93 of the hanging basket 5, and build a template at the position corresponding to the pouring construction area 93 at the gap between the two bridge bodies 11, and make the template between the column 2 4 and the concrete block 1 12, and then pour concrete in the template to obtain a concrete block 2 13 with a reserved hole. The position of the concrete block 2 13 is as shown in FIG. Figure 4As shown, concrete block 2 13 corresponds to the pouring construction area 93 of the hanging basket 5, and then the template is removed manually, and the template and tools are transferred back to the upper side of the bridge body 11, and the person climbs out of the hanging basket 5, and then the nut 10 is screwed upwards manually, and then the long rod 7 is driven to move downward, and the long rod 7 drives the limit block 8 to move downward, so that the limit block 8 moves to the lower side of the groove 92, and then the long rod 7 is driven manually to rotate ninety degrees, and the long rod 7 drives the limit block 8 to rotate ninety degrees, so that the limit block 8 moves to the bottom of the through groove 91, and then the long rod 7 is driven manually to move upward, so that the long rod 7 is away from the cylinder 9 and is pulled out from the concrete block 1 12 and the trolley 2, and then, the external drive is fixed to the trolley 2, and the trolley 2 is driven to move to the right by the external drive, and the trolley 2 drives the hanging basket 5 and the parts thereon to move through the column 1 3 and the column 2 4 until the through hole corresponding to the long rod 7 on the trolley 2 is aligned with the reserved hole on the concrete block 2 13, and the trolley The vehicle 2 stops moving, and then repeats the above operation to install the long rod 7. The left end of the hanging basket 5 is fixed to the traveling vehicle 2 through the cooperation of the long rod 7, the limit block 8, the cylinder 9 and the nut 10, and then repeats the above operation to perform the next pouring operation. In this way, the gap between the two bridge bodies 11 can be filled with slow-setting soil to complete the old bridge splicing operation. When in use, only the crane needs to be used to install this work trolley in the initial stage, and this work trolley can move along the gap between the two bridge bodies 11, so as to cooperate with manual labor to complete the pouring operation of the gap. No crane is required during the pouring process, which avoids the poor accuracy caused by the use of crane construction in the existing technology and the problem of difficulty in construction in special environments such as across water, across roads, and across valleys. At the same time, compared with the existing technology, manual labor can adopt a normal standing posture to perform construction operations in the pouring construction area 93 of the hanging basket 5, without leaning over for construction, which not only improves safety performance but also reduces the difficulty of manual construction.

[0040] Normally, the long rod 7 is set as a metal rod with threads at both ends. During installation, a person needs to climb into the hanging basket 5 and then screw the lower end of the long rod 7 into the end of the hanging basket 5. At this time, the pouring construction area 93 of the hanging basket 5 is in a cantilevered state. There are safety hazards when a person stands in the cantilevered pouring construction area 93 of the hanging basket 5. Therefore, a limit block 8 is set at the lower part of the long rod 7. During installation, a person only needs to stand on the upper side of the bridge body 11 to operate the long rod 7 to complete the installation operation, which greatly reduces safety hazards.

[0041] When the long rod 7 drives the limit block 8 to be inserted downward into the through groove 91, if the limit block 8 is not completely aligned with the through groove 91, the limit block 8 will be hung on the inclined portion of the cylinder 9. At this time, the long rod 7 is rotated slowly manually, and the long rod 7 drives the limit block 8 to rotate slowly. When the limit block 8 is aligned with the through groove 91, under the action of gravity, the limit block 8 can move quickly into the through groove 91, thus completing the rapid positioning operation. Similarly, when the long rod 7 drives the limit block 8 to be inserted upward into the groove 92, an upward thrust is applied to the long rod 7 manually, so that the limit block 8 has a tendency to move upward, and then the long rod 7 is rotated slowly, and the long rod 7 drives the limit block 8 to rotate slowly. When the limit block 8 is aligned with the groove 92, the limit block 8 with an upward movement trend can move quickly into the groove 92, which optimizes the positioning operation and makes manual operation more convenient.

[0042] When the limit block 8 moves to the upper end of the groove 92, it is necessary to manually apply an upward pulling force to the long rod 7 to ensure that the long rod 7 and the limit block 8 do not fall before the nut 10 can be tightened. The operation is relatively complicated. Therefore, an elastic telescopic rod 201 and a connecting block 202 are provided at the bottom inner side of the cylinder 9. When the long rod 7 drives the limit block 8 to move downward and passes through the through groove 91, the lower end of the long rod 7 contacts the connecting block 202 and pushes it to move downward, and the connecting block 202 compresses the elastic telescopic rod 201. Then the long rod 7 is manually rotated, and the long rod 7 drives the limit block 8 to rotate so that the limit block 8 is away from the through groove 91. At this time, the manual operation stops applying the downward extrusion force to the long rod 7, and the elastic telescopic rod 201 rebounds and drives the long rod 7 to move upward, and the long rod 7 drives the limit block 8 to move upward, pressing the limit block 8 to the inclined position at the lower part of the cylinder 9. When the nut 10 is manually tightened, the elastic telescopic rod 201 and the connecting block 202 cooperate to apply an upward thrust to the long rod 7 and the limit block 8, so that when manually tightening the nut 10 and aligning the limit block 8 with the groove 92, there is no need to apply an upward pulling force to the long rod 7, which is conducive to reducing the difficulty of manual operation and improving efficiency.

[0043] Example 2

[0044] On the basis of Example 1, Figure 5 and Figure 9the lower end of the long rod 7 is rotatably connected to the steel ball 203, and the steel ball 203 replaces the long rod 7 by moving on the surface of the concrete block 12 and the concrete block 13 to prevent scratches on the concrete block 12 and the concrete block 13.

[0045] The steel ball 203 is made of a smooth material to reduce friction.

[0046] The lower side surfaces of the long rod 7 and the limiting block 8 are both configured as curved surfaces inclined upward to prevent the limiting block 8 from being stuck in the reserved hole of the concrete block 2 13 .

[0047] It also includes a buffer assembly, which includes a movable block 204 and a spring 205; the movable block 204 is slidably connected to the trolley 2; four springs 205 are fixedly connected between the movable block 204 and the trolley 2, and the springs 205 are set to be made of alloy material.

[0048] After that, the long rod 7 and the parts on it are manually driven to move upward, so that the long rod 7 moves to above the concrete block 12. At this time, the long rod 7 still passes through the traveling crane 2, and then the traveling crane 2 drives the parts on it to move a certain distance to the right, so that the long rod 7 is away from above the reserved hole of the concrete block 12. Then, the long rod 7 is manually stopped from providing tension to the long rod 7, and the long rod 7 slides downward under the action of gravity, so that the lower end of the long rod 7 contacts the upper side of the concrete block 2 13. Then the traveling crane 2 drives the parts on it to continue to move to the right, so that the long rod 7 slides on the surface of the concrete block 2 13. When the long rod 7 moves above the reserved hole of the concrete block 2 13, the long rod 7 slides downward under the action of gravity into the reserved hole of the concrete block 2 13, thereby making the traveling crane 2 unable to continue moving. Afterwards, the long rod 7 is manually installed. When in use, the long rod 7 can also be used for automatic positioning of the moving traveling crane 2, without manual positioning, which is conducive to improving efficiency.

[0049] When the long rod 7 slides on the surface of the concrete block 13, the long rod 7 is likely to scratch the surface of the concrete block 13. Therefore, a steel ball 203 is provided at the lower end of the long rod 7. After the long rod 7 is away from the reserved hole of the concrete block 12, the long rod 7 is manually stopped from providing tension to the long rod 7. The long rod 7 moves downward under the action of gravity, and the long rod 7 drives the steel ball 203 to move downward, so that the steel ball 203 contacts the surface of the concrete block 13. Then the driving crane 2 drives the parts thereon to move to the right, so that the long rod 7 drives the steel ball 203 to roll on the surface of the concrete block 13. When the long rod 7 moves to the reserved hole of the concrete block 13, the long rod 7 slides downward into the reserved hole of the concrete block 13 under the action of gravity, completing the positioning operation. When in use, the steel ball 203 replaces the long rod 7 in the form of rolling to slide on the surface of the concrete block 13, so that the concrete block 13 can be avoided from being scratched.

[0050] When the long rod 7 moves to above the reserved hole of the second concrete block 13, the limit block 8 protruding from the surface of the long rod 7 will interfere with its falling into the reserved hole of the second concrete block 13. Therefore, the lower side surfaces of the long rod 7 and the limit block 8 are both set to be inclined upward curved surfaces, making it easier for the long rod 7 and the limit block 8 to penetrate the reserved hole of the second concrete block 13 to avoid getting stuck.

[0051] When the long rod 7 moves to the reserved hole above the concrete block 13, the long rod 7 slides downward into the reserved hole of the concrete block 13 under the action of gravity. At this time, the driving trolley 2 stops driving immediately, but it has the inertia of movement, so that the driving trolley 2 will still move a short distance to the right, thereby causing the driving trolley 2 to apply a rightward pulling force to the long rod 7. If the inertia is too large, the long rod 7 will bend, which will interfere with the subsequent installation and alignment of the long rod 7. Therefore, a movable block 204 is set on the driving trolley 2, and the long rod 7 is inserted into the movable block 204. When the trolley 2 continues to move to the right under the action of inertia, the lower end of the long rod 7 penetrates into the reserved hole of the concrete block 13, so that the long rod 7 and the movable block 204 remain stationary, that is, the trolley 2 moves to the right relative to the movable block 204 and stretches or compresses the spring 205, thereby effectively avoiding the problem of bending the long rod 7. When in use, the inertial movement of the trolley 2 is buffered by the cooperation of the movable block 204 and the spring 205, thereby avoiding the trolley 2 from bending the long rod 7 and interfering with its installation and alignment operation.

[0052] Example 3

[0053] On the basis of Example 2, Figure 3 As shown, it also includes a telescopic support rod 206; six telescopic support rods 206 are bolted to the hanging basket 5, and the front and rear sides of the hanging basket 5 are supported by the telescopic support rods 206, which can reduce the shaking degree of the hanging basket 5.

[0054] A soft rubber pad is provided at one end of the telescopic support rod 206 away from the hanging basket 5 to prevent the telescopic support rod 206 from crushing the concrete block 12 and the concrete block 2 13.

[0055] The telescopic support rod 206 consists of a sleeve rod and a telescopic rod. The telescopic rod and the sleeve rod are matched by threads. After the hanging basket 5 is fixed below the gap between the two bridge bodies 11, the length of the telescopic support rod 206 is manually adjusted by screwing the telescopic rod so that the end of the telescopic support rod 206 contacts the side wall of the bridge body 11. During the construction process, the telescopic support rod 206 can provide support force for the hanging basket 5, greatly reducing the shaking of the hanging basket 5, thereby improving the overall stability and facilitating safe construction.

[0056] The above is a detailed introduction to the present application. Specific examples are used herein to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method and core idea of the present application. At the same time, for those skilled in the art, based on the idea of the present application, there may be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A trolley for splicing an old bridge with a large span, comprising a track (1) and a trolley (2); two tracks (1) are provided; a trolley (2) is provided on both tracks (1), and the trolley (2) moves along the track (1); characterized in that: It also includes a column 1 (3), a column 2 (4), a hanging basket (5), a staircase (6), a long pole (7), a limit block (8), a cylinder (9) and a nut (10); one end of the traveling crane (2) is fixedly connected to the column 1 (3); the middle part of the traveling crane (2) is fixedly connected to the column 2 (4); the lower ends of the column 1 (3) and the column 2 (4) are fixedly connected to the hanging basket (5); the hanging basket (5) is divided into a pouring construction area (93) and a material placement area (94); the staircase (6) is fixedly connected to the upper part of the column 2 (4); the other end of the traveling crane (2) is penetrated by a long pole (7); the long pole The lower end of (7) is fixed with a plurality of limit blocks (8); a cylinder (9) is fixed on the hanging basket (5), and the cylinder (9) is aligned with the long rod (7); a plurality of through grooves (91) are provided on the cylinder (9); a plurality of grooves (92) are provided on the cylinder (9); the lower end of the long rod (7) is inserted into the inner side of the cylinder (9); the limit blocks (8) are located in the corresponding grooves (92), and the upper side of the limit blocks (8) abuts against the top of the groove (92); a nut (10) is screwed on the upper end of the long rod (7), and the lower side of the nut (10) contacts the traveling crane (2).

2. The large-span bridge old bridge splicing operation trolley according to claim 1 is characterized in that: The surface of the staircase (6) is provided with a plurality of convex strips.

3. The large-span bridge old bridge splicing operation trolley according to claim 1 is characterized in that: The inner upper part and the inner lower part of the cylinder (9) are both provided with chamfers.

4. The large-span bridge old bridge splicing operation trolley according to claim 3 is characterized in that: The auxiliary assembly also includes an elastic telescopic rod (201) and a connecting block (202); the elastic telescopic rod (201) is fixedly connected to the inner side of the cylinder (9); the connecting block (202) is fixedly connected to the telescopic end of the elastic telescopic rod (201), and the upper side of the connecting block (202) is in contact with the long rod (7).

5. The large-span bridge old bridge splicing operation trolley according to claim 4 is characterized in that: It also includes a steel ball (203); the lower end of the long rod (7) is rotatably connected to the steel ball (203).

6. The large-span bridge old bridge splicing operation trolley according to claim 5 is characterized in that: The steel ball (203) is set to a smooth material.

7. The large-span bridge old bridge splicing operation trolley according to claim 6 is characterized in that: The lower side surfaces of the long rod (7) and the limiting block (8) are both configured as curved surfaces inclined upward.

8. The large-span bridge old bridge splicing operation trolley according to claim 7 is characterized in that: The vehicle further comprises a buffer assembly, which comprises a movable block (204) and a spring (205); the movable block (204) is slidably connected to the trolley (2); and a plurality of springs (205) are fixedly connected between the movable block (204) and the trolley (2).

9. A large-span bridge old bridge splicing operation trolley according to any one of claims 1 to 8, characterized in that: It also includes a telescopic support rod (206); a plurality of telescopic support rods (206) are fixedly connected to the hanging basket (5).

10. The large-span old bridge splicing operation trolley according to claim 9 is characterized in that: A soft rubber pad is provided at one end of the telescopic support rod (206) away from the hanging basket (5).

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