Box culvert jacking device

Abstract

The utility model discloses a box culvert jacking device and relates to the technical field of box culvert construction, the box culvert jacking device comprises a movable cross beam, jacking iron and a fixed cross beam, the jacking iron comprises a shell, a first insertion block is installed in the shell in a sliding mode, and penetrating holes matched with the first insertion block are formed in the two ends of the shell; a driving mechanism used for driving the first insertion blocks is installed in the shell, the side, facing the back, of the movable cross beam is fixedly connected with a plurality of second insertion blocks, the driving mechanism comprises a push rod installed in the jacking iron shell in a sliding mode, and one end of the push rod is fixedly connected with the first insertion blocks through a limiting plate; in the process of jacking the box culvert by the device, the newly added jacking iron is aligned with the previous jacking iron, then the hydraulic cylinder is started to push the movable cross beam to move towards the jacking iron, the second insertion block can be inserted into the jacking iron, and the first insertion block in the jacking iron is pushed to be inserted into the previous jacking iron through the push rod; the jacking blocks on the same straight line are mutually positioned and connected, so that the stability of the jacking blocks in the box culvert jacking process is effectively improved.

Description

Technical Field

[0001] This utility model relates to the field of box culvert construction technology, specifically to a box culvert jacking device. Background Technology

[0002] Box culvert jacking is an underground pipeline construction technology, mainly used in the construction of tunnels or pipelines for urban rail transit, highways, railways and other projects. During the construction process, a precast reinforced concrete box is placed on the ground and pushed into a pre-excavated trench by jacking equipment to complete the pipeline laying.

[0003] Currently, commonly used box culvert jacking equipment mainly consists of hydraulic cylinders, crossbeams, jacking columns, and jacking irons. The jacking irons are 0.1-0.8m long and are used to adjust the initial jacking stroke, while the jacking columns are 2-8m long and are used for long-distance jacking. After each jacking stroke, the hydraulic cylinders need to be reset and jacking irons added to achieve continuous jacking of the box culvert. After the jacking irons have reached a certain usage, they need to be replaced with jacking columns to reduce the amount of jacking irons used and improve the overall stability of the jacking equipment.

[0004] However, most of the top irons currently used lack connection or positioning structures, and there is no connection between adjacent top irons. Although this facilitates the layout and hoisting of the top irons, the stability is poor during the jacking process and needs to be improved. Utility Model Content

[0005] The purpose of this invention is to address the shortcomings of existing technologies by providing a box culvert jacking device.

[0006] The technical solution of this utility model is: a box culvert jacking device, including a connecting beam, a hydraulic cylinder, a movable crossbeam, jacking blocks, and a fixed crossbeam. The connecting beam is detachably installed at the bottom of the box culvert facing the rear. The cylinder bodies of the hydraulic cylinders are detachably connected to the connecting beam, and their push rod ends are detachably connected to the movable crossbeam. Several jacking blocks are located between the movable crossbeam and the fixed crossbeam. Each jacking block includes a housing, and a first insert block is slidably installed inside the housing. Both ends of the first insert block have through holes adapted to the first insert block. A driving mechanism for driving the first insert block is installed inside the housing. Multiple second insert blocks are fixedly connected to the movable crossbeam facing the rear. The second insert blocks are adapted to the through holes. Multiple slots are opened on the side of the fixed crossbeam away from the rear. The slots are adapted to the first insert blocks.

[0007] Preferably, the top iron is in the shape of a square tube.

[0008] Preferably, the driving mechanism includes a push rod slidably installed in the top iron housing. One end of the push rod is fixedly connected to the first insert block through a limiting plate. When the second insert block is inserted into the top iron, the second insert block pushes the first insert block in the top iron to insert into the previous top iron through the push rod.

[0009] A rotating shaft is rotatably installed inside the housing. The rotating shaft is connected to the push rod for transmission. One end of the shaft passes through the housing and is fixedly connected to multiple force-bearing rods.

[0010] Preferably, a gear is fixedly sleeved on the rotating shaft inside the housing, and a rack is fixedly installed on the outer wall of the push rod, with the rack and gear meshing with each other.

[0011] Preferably, the outer walls on both sides of the push rod are provided with sliding grooves, and the inner wall of the top iron housing is fixed with a guide bar that is slidably connected to the sliding groove.

[0012] Preferably, lifting lugs are fixed on the fixed crossbeam, movable crossbeam, connecting beam, hydraulic cylinder, and top iron.

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] During the jacking process of the box culvert, this device aligns the newly installed jacking block with the previous jacking block. Then, the hydraulic cylinder is activated to push the movable crossbeam towards the jacking block, allowing the second insert block to be inserted into the jacking block. The push rod then pushes the first insert block inside the jacking block into the previous jacking block, so that the jacking blocks on the same straight line are positioned and connected to each other, thereby effectively improving the stability of the jacking blocks during the box culvert jacking process. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the structure of this utility model;

[0016] Figure 2 for Figure 1 Top view;

[0017] Figure 3 for Figure 1 A partial sectional view;

[0018] Figure 4 This is a schematic diagram of the top iron structure.

[0019] In the diagram: 1. Fixed crossbeam, 2. Movable crossbeam, 3. Connecting beam, 4. Hydraulic cylinder, 5. Top column, 6. Top iron, 7. First insert block, 8. Limiting plate, 9. Push rod, 10. Slide groove, 11. Guide bar, 12. Rotating shaft, 13. Gear, 14. Force rod, 15. Rack, 16. Second insert block, 17. Slot, 18. Backing, 19. Box culvert. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments. Example 1

[0021] Reference Figure 1-4As shown, a box culvert jacking device includes a connecting beam 3, a hydraulic cylinder 4, a movable crossbeam 2, jacking blocks 6, and a fixed crossbeam 1. The connecting beam 3 is detachably installed at the bottom of the box culvert 19 facing the rear 18 by bolts. The cylinder body of the hydraulic cylinder 4 is detachably connected to the connecting beam 3, and the push rod 9 is detachably connected to the movable crossbeam 2. Several jacking blocks 6 are located between the movable crossbeam 2 and the fixed crossbeam 1. The jacking blocks 6 are square-cylindrical and include a shell. A first insert 7 is slidably installed inside the shell, and both ends of the first insert 7 have through holes adapted to the first insert 7. A driving mechanism for driving the first insert 7 is installed inside the shell. A plurality of second inserts 16 are fixedly connected to the movable crossbeam 2 facing the rear 18. The second inserts 16 are adapted to the through holes. A plurality of slots 17 are opened on the side of the fixed crossbeam 1 away from the rear 18. The slots 17 are adapted to the first inserts 7.

[0022] In addition, adjacent fixed crossbeams 1 are connected by top columns 5.

[0023] More specifically, the drive mechanism includes a push rod 9 that is slidably installed in the housing of the top iron 6. One end of the push rod 9 is fixedly connected to the first insert block 7 through a limiting plate 8. When the second insert block 16 is inserted into the top iron 6, the second insert block 16 pushes the first insert block 7 in the top iron 6 through the push rod 9 to insert into the previous top iron 6.

[0024] During the jacking process of box culvert 19, when it is necessary to add a jacking block 6, the newly added jacking block 6 is aligned with the previous jacking block 6. Then, the hydraulic cylinder 4 is activated to push the movable crossbeam 2 toward the jacking block 6, so that the second insert block 16 can be inserted into the jacking block 6. The push rod 9 pushes the first insert block 7 in the jacking block 6 to be inserted into the previous jacking block 6, so that the jacking blocks 6 located on the same straight line are mutually positioned and connected, thereby effectively improving the stability of the jacking blocks 6 during the jacking process of box culvert 19. When it is necessary to separate adjacent jacking blocks 6, it is only necessary to operate the drive mechanism to pull out the first insert block 7 on the jacking block 6 from the previous jacking block 6. The operation is simple and convenient. Example 2

[0025] As a preferred embodiment of this utility model, this embodiment further designs the driving mechanism based on Embodiment 1, specifically as follows:

[0026] Reference Figure 3-4 As shown, a rotating shaft 12 is rotatably installed inside the housing. The rotating shaft 12 is connected to the push rod 9 for transmission. One end of the shaft passes through the housing and is fixedly connected to multiple force-bearing rods 14.

[0027] More specifically, a gear 13 is fixedly sleeved on the rotating shaft 12 inside the housing, and a rack 15 is fixedly installed on the outer wall of the push rod 9. The rack 15 and the gear 13 mesh with each other.

[0028] By turning the force rod 14 to rotate the shaft 12, the push rod 9 can be driven to move inside the top iron 6 by the cooperation of the gear 13 and the rack 15, thereby driving the corresponding first insert block 7 to move. The operation is simple and convenient. Example 3

[0029] Reference Figure 3 As shown, based on Embodiment 2, further, grooves 10 are provided on both outer walls of the push rod 9, and guide bars 11 that are slidably connected to the grooves 10 are fixed on the inner wall of the top iron 6 housing.

[0030] The cooperation of the slide groove 10 and the guide bar 11 can guide the push rod 9 in the top iron 6, thereby improving the stability of the push rod 9's movement and ensuring that the rack 15 and the gear 13 always remain engaged.

[0031] In addition, lifting lugs are fixed on the fixed crossbeam 1, movable crossbeam 2, connecting beam 3, hydraulic cylinder 4, top column 5, and top iron 6 to facilitate the hoisting of each component.

[0032] This utility model is not limited to the above-described embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of this utility model, and the changed content still falls within the protection scope of this utility model.

Claims

1. A box culvert jacking device, comprising a connecting beam, a hydraulic cylinder, a movable crossbeam, jacking blocks, and a fixed crossbeam, wherein the connecting beam is detachably installed at the bottom of the box culvert facing the rear, the cylinder bodies of the hydraulic cylinders are detachably connected to the connecting beam, and the push rod ends are detachably connected to the movable crossbeam; a plurality of jacking blocks are located between the movable crossbeam and the fixed crossbeam, characterized in that: The top iron includes a housing, in which a first insert block is slidably installed, with through holes at both ends adapted to the first insert block; a drive mechanism for driving the first insert block is installed in the housing; a number of second insert blocks are fixedly connected to the side of the movable crossbeam facing the back, and the second insert blocks are adapted to the through holes; a number of slots are opened on the side of the fixed crossbeam away from the back, and the slots are adapted to the first insert blocks.

2. The box culvert jacking device according to claim 1, characterized in that: The top iron is in the shape of a square tube.

3. The box culvert jacking device according to claim 1, characterized in that: The driving mechanism includes a push rod that is slidably installed in the top iron housing. One end of the push rod is fixedly connected to the first insert block through a limiting plate. When the second insert block is inserted into the top iron, the second insert block pushes the first insert block in the top iron to insert into the previous top iron through the push rod. A rotating shaft is rotatably installed inside the housing. The rotating shaft is connected to the push rod for transmission. One end of the shaft passes through the housing and is fixedly connected to multiple force-bearing rods.

4. A box culvert jacking device according to claim 3, characterized in that: A gear is fixedly sleeved on the rotating shaft inside the housing, and a rack is fixedly installed on the outer wall of the push rod. The rack and the gear mesh with each other.

5. A box culvert jacking device according to claim 3, characterized in that: The push rod has grooves on both outer walls, and the top iron housing has guide bars that are slidably connected to the grooves on the inner wall.

6. A box culvert jacking device according to claim 1, characterized in that: Lifting lugs are fixed to the fixed crossbeam, movable crossbeam, connecting beam, hydraulic cylinder, and top iron.

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