Synchronous jacking device for bridge maintenance

Abstract

The utility model relates to the technical field of bridge maintenance, and particularly discloses a synchronous jacking device for bridge maintenance, which is characterized in that a jacking device is arranged at an interval, a second hydraulic cylinder pulls down a base plate, so that the weight of a bridge is pressed on the adjacent jacking device, and the second hydraulic cylinder is contracted. The threaded rods are rotated to push the clamping plates to slide towards the sliding grooves in the side ends of the bearing blocks, after the two clamping plates clamp the bearing blocks, the four first hydraulic cylinders are started at the same time, the bearing blocks and the second hydraulic cylinders are jacked upwards, after the bearing blocks are lifted, one bearing block is plugged into the top end of the bearing plate, then the clamping plates are opened, the first hydraulic cylinders are reset, and then the bearing blocks are clamped. The jacking device with one additional bearing block is adopted, the second hydraulic cylinder is started to jack the bridge, the adjacent jacking device repeats the step, and the lifting height of the second hydraulic cylinder is increased by alternately using the two adjacent devices and increasing the number of the bearing blocks, so that the effect of convenience in use is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge maintenance, in particular to a synchronous jacking device for bridge maintenance. Background Art

[0002] The Synchronous Lifting System is controlled by a developed electronic system to control the hydraulic movement. This automatically managed system feeds back the pressure and extended hydraulic quantity to the central computer control system. This control system automatically opens and closes the directional valves as required to maintain the load level within the specified tolerances.

[0003] Existing Chinese patent: A synchronous jacking device for replacing a bridge bearing, patent number CN218712287U, includes a first beam body, mounting plates are fixedly installed on both sides of the first beam body, a mounting box is arranged on the top of the mounting plate, a fixed anchor bolt is arranged inside the mounting box, a first card slot is opened on the top of the mounting box, a first card block is clamped inside the first card slot, and a support block is arranged on the top of the first card block. The beneficial effects of the utility model are as follows: by inserting the second card block into the inside of the second card slot, the installation of the displacement sensor can be completed, and then the rotating block is rotated to drive the screw rod to rotate, and the rotation of the screw rod can drive the slider to move, and the movement of the slider can drive the limit plate on one side to move, thereby the limit plate can be inserted into the inside of the second limit slot and the first limit slot, completing the limiting work of the first card block and the second card block, and further improving the stability during use.

[0004] However, in the process of implementing the above technical solution, it was found that there are at least the following technical problems: the above-mentioned jacking device needs to cast a load-bearing platform with concrete before use. Since the lifting distance of the jack is fixed, if the load-bearing platform is too far away from the bridge, the lifting height may not be enough, and if the distance is too close, it cannot be installed and used. When the lifting height is not enough, it is necessary to cast it again on the original load-bearing platform, which is time-consuming, labor-intensive and inconvenient to use. Utility Model Content

[0005] 1. Technical issues to be solved

[0006] In view of the deficiencies in the prior art, the utility model provides a synchronous jacking device for bridge maintenance, which solves the technical problem that the above-mentioned jacking device needs to cast a load-bearing platform with concrete before use. Since the lifting distance of the jack is fixed, if the load-bearing platform is too far away from the bridge, the lifting height may not be enough, and if the distance is too close, it cannot be installed and used. When the lifting height is not enough, it is necessary to cast it again on the original load-bearing platform, which is time-consuming, labor-intensive and inconvenient to use.

[0007] (II) Technical solution

[0008] In order to achieve the above objectives, the present invention is implemented through the following technical solutions:

[0009] A synchronous jacking device for bridge maintenance includes a pressure plate, four first hydraulic cylinders are fixedly installed on the top of the pressure plate, a lifting platform is fixedly installed on the top of the first hydraulic cylinder, two clamping plates are symmetrically slidably installed on both sides of the lifting platform, racks are fixedly installed on the side ends of the two clamping plates, a load-bearing block is installed between the two clamping plates, and a second hydraulic cylinder is installed on the top of the load-bearing block; multiple load-bearing blocks can be installed in the device.

[0010] Preferably: a sliding block is slidably mounted on the side end of the pressure plate, and a threaded rod is connected to the inner thread of the sliding block; and the end of the threaded rod is rotatably connected to one of the clamping plates.

[0011] Preferably: a gear is rotatably mounted on the side end of the lifting platform; the gear is meshed with the two racks, and a pad is fixedly mounted on the top end of the second hydraulic cylinder.

[0012] (III) Beneficial effects

[0013] 1. Connect the first hydraulic cylinder and the pad to the hydraulic and PLC control system, so that the two adjacent jacking devices form an interlocking alternating lift. All the second hydraulic cylinders are started at the same time to lift the bridge, with a jacking device spaced apart from each other. The second hydraulic cylinder pulls the pad down so that the weight of the bridge is pressed on the adjacent jacking device. For the jacking device contracted by the second hydraulic cylinder, the threaded rod is rotated to push the clamping plate to slide toward the slide groove at the side end of the load-bearing block. The clamping plate drives the rack through the meshing with the gear, so that the other clamping plate also slides inward. After the two clamping plates clamp the load-bearing block, the four first hydraulic cylinders are started at the same time to lift the load-bearing block and the second hydraulic cylinder upward. After the load-bearing block is lifted, a load-bearing block is inserted into the top of the pressure plate, and then the clamping plate is opened to reset the first hydraulic cylinder. The jacking device with one more load-bearing block will start the second hydraulic cylinder to lift the bridge. The adjacent jacking device repeats this step. By using the two adjacent devices alternately and increasing the number of load-bearing blocks, the liftable height of the second hydraulic cylinder is increased, thereby achieving an effect of being easy to use.

[0014] 2. There is a bulge on the top of the load-bearing block and a groove on the bottom of the load-bearing block. When the two load-bearing blocks are stacked together, they play a stabilizing role to prevent displacement during the jacking process. During use, the action of the bridge is transmitted along the second hydraulic cylinder to the load-bearing block and then to the pressure plate and finally to the bearing platform. The large area of ​​the pressure plate can disperse the pressure of the bridge to avoid damage caused by excessive pressure on the contact surface. The pressure plate and the load-bearing block are used to improve the stability of the equipment operation, thereby improving the effect of construction and installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] The above description is only an overview of the technical solution of the utility model. In order to more clearly understand the technical means of the utility model and implement it according to the contents of the specification, the following is a detailed description of the preferred embodiments of the utility model in conjunction with the accompanying drawings.

[0016] Figure 1 This is a structural diagram of the pressure plate of the utility model;

[0017] Figure 2 This is a structural diagram of the hydraulic cylinder of the utility model;

[0018] Figure 3 This is a gear structure diagram of the utility model;

[0019] Figure 4 This is a cross-sectional structural diagram of the load-bearing block of the utility model.

[0020] Legend: 1. Pressure plate; 2. First hydraulic cylinder; 3. Lifting platform; 4. Clamping plate; 5. Second hydraulic cylinder; 6. Threaded rod; 7. Slider; 8. Load-bearing block; 9. Rack; 11. Gear; 12. Pad. DETAILED DESCRIPTION

[0021] The embodiment of the present application effectively solves the above-mentioned jacking device by providing a synchronous jacking device for bridge maintenance. Before use, the load-bearing platform needs to be poured with concrete. Since the lifting distance of the jack is fixed, if the load-bearing platform is too far away from the bridge, the lifting height may not be enough, and it cannot be installed and used if the distance is too close. When the lifting height is not enough, it is necessary to cast it again on the original load-bearing platform, which is time-consuming, labor-intensive and inconvenient to use. The first hydraulic cylinder and the pad are connected to the hydraulic and PLC control system so that the two adjacent jacking devices are interlocked and lifted alternately. All the second hydraulic cylinders are started at the same time to jack up the bridge, with a jacking device spaced apart from each other. The second hydraulic cylinder pulls the pad down so that the weight of the bridge is pressed on the adjacent jacking device. For the jacking device with the second hydraulic cylinder contracted, the threaded rod is rotated to push the clamping plate to slide towards the slide groove at the side end of the load-bearing block. The clamping plate drives the rack to mesh with the gear, so that the other clamping plate also slides inward. After the two clamping plates clamp the load-bearing block , the four first hydraulic cylinders are started at the same time to lift the load-bearing block and the second hydraulic cylinder upward. After the load-bearing block is raised, a load-bearing block is inserted into the top of the pressure plate, and then the clamping plate is opened to reset the first hydraulic cylinder. A lifting device with an additional load-bearing block is added, and the second hydraulic cylinder is started to lift the bridge. The adjacent lifting device repeats this step. By alternating the use of two adjacent devices and increasing the number of load-bearing blocks, the liftable height of the second hydraulic cylinder is increased, thereby achieving an effect of easy use. There is a protrusion on the top of the load-bearing block and a groove on the bottom of the load-bearing block. When the two load-bearing blocks are stacked together, they play a stabilizing role to prevent displacement during the lifting process. During use, the action of the bridge is transmitted along the second hydraulic cylinder to the load-bearing block and then to the pressure plate and finally to the bearing platform. The large area of ​​the pressure plate can disperse the pressure of the bridge to avoid damage caused by excessive pressure on the contact surface. The stability of the equipment operation is improved by the pressure plate and the load-bearing block, thereby achieving the effect of improving the construction and installation.

[0022] Example

[0023] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the technical solution in the embodiment of the present application effectively solves the above-mentioned jacking device. Before use, the load-bearing platform needs to be poured with concrete. Since the lifting distance of the jack is fixed, if the load-bearing platform is too far away from the bridge, the lifting height may not be enough, and if the distance is too close, it cannot be installed and used. When the lifting height is not enough, it is necessary to cast it again on the original load-bearing platform, which is time-consuming, labor-intensive and inconvenient to use. The overall idea is as follows:

[0024] In view of the problems existing in the prior art, the utility model provides a synchronous jacking device for bridge maintenance, including a pressure plate 1, four first hydraulic cylinders 2 are fixedly installed on the top of the pressure plate 1, a lifting platform 3 is fixedly installed on the top of the first hydraulic cylinder 2, two clamping plates 4 are symmetrically slidably installed on both sides of the lifting platform 3, and racks 9 are fixedly installed on the side ends of the two clamping plates 4.

[0025] A load-bearing block 8 is installed between the two clamping plates 4, and a second hydraulic cylinder 5 is installed on the top of the load-bearing block 8; multiple load-bearing blocks 8 can be installed in the device, and a slider 7 is slidably installed on the side end of the pressure plate 1, and the internal thread of the slider 7 is connected to a threaded rod 6.

[0026] The end of the threaded rod 6 is rotatably connected to one of the clamping plates 4 , and a gear 11 is rotatably installed on the side end of the lifting platform 3 ; the gear 11 is meshed with two racks 9 , and a pad 12 is fixedly installed on the top of the second hydraulic cylinder 5 .

[0027] Working principle:

[0028] The first step is to install multiple jacking devices on the load-bearing platform, connect the first hydraulic cylinder 2 and the pad 12 to the hydraulic and PLC control system, so that the two adjacent jacking devices form an interlocking and alternating lifting, and all the second hydraulic cylinders 5 are started at the same time to jack up the bridge, with one jacking device between them. The second hydraulic cylinder 5 pulls down the pad 12 so that the weight of the bridge is pressed on the adjacent jacking device. For the jacking device retracted by the second hydraulic cylinder 5, the threaded rod 6 is rotated to push the clamping plate 4 to slide towards the slide groove at the side end of the load-bearing block 8, and the clamping plate 4 drives the rack 9 to mesh with the gear 11, so that the other clamping The holding plate 4 also slides inward. After the two clamping plates 4 clamp the load-bearing block 8, the four first hydraulic cylinders 2 are started at the same time to lift the load-bearing block 8 and the second hydraulic cylinder 5 upward. After the load-bearing block 8 is lifted, a load-bearing block 8 is inserted into the top of the pressure plate 1, and the clamping plate 4 is opened to reset the first hydraulic cylinder 2. A lifting device with an additional load-bearing block 8 is added, and the second hydraulic cylinder 5 is started to lift the bridge. The adjacent lifting device repeats this step. By alternating the use of two adjacent devices and increasing the number of load-bearing blocks 8, the liftable height of the second hydraulic cylinder 5 is increased, thereby achieving an effect of easy use.

[0029] In the second step, there is a convex block at the top of the load-bearing block 8, and a groove is provided at the bottom of the load-bearing block 8. When the two load-bearing blocks 8 are stacked together, they play a stabilizing role to prevent displacement during the jacking process. During use, the action of the bridge is transmitted along the second hydraulic cylinder 5 to the load-bearing block 8 and then to the pressure plate 1 and finally reaches the bearing platform. The pressure plate 1 has a large area and can disperse the pressure of the bridge to avoid damage caused by excessive pressure on the contact surface. The stability of the equipment operation is improved by the pressure plate 1 and the load-bearing block 8, achieving the effect of improving the construction and installation. Finally, it should be explained that: Obviously, the above embodiments are only examples made to clearly illustrate the utility model, and are not limitations on the implementation methods. For ordinary technicians in the field, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from this are still within the scope of protection of the utility model.

Claims

1. A synchronous lifting device for bridge maintenance, comprising a pressure plate (1), characterized in that Four first hydraulic cylinders (2) are fixedly mounted on the top of the pressure plate (1), a lifting platform (3) is fixedly mounted on the top of the first hydraulic cylinder (2), two clamping plates (4) are symmetrically slidably mounted on both sides of the lifting platform (3), racks (9) are fixedly mounted on the side ends of the two clamping plates (4), a bearing block (8) is mounted between the two clamping plates (4), and a second hydraulic cylinder (5) is mounted on the top of the bearing block (8); Wherein, a plurality of load-bearing blocks (8) can be installed in the device.

2. A synchronous lifting device for bridge maintenance as claimed in claim 1, characterized in that: A slider (7) is slidably mounted on the side end of the pressure plate (1), and the inner thread of the slider (7) is connected to a threaded rod (6); The end of the threaded rod (6) is rotatably connected to one of the clamping plates (4).

3. A synchronous lifting device for bridge maintenance as claimed in claim 1, characterized in that: A gear (11) is rotatably mounted on the side end of the lifting platform (3); The gear (11) is meshed with the two racks (9).

4. A synchronous lifting device for bridge maintenance as claimed in claim 1, characterized in that: A backing plate (12) is fixedly mounted on the top end of the second hydraulic cylinder (5).

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