Jacking device for road and bridge maintenance

Abstract

The utility model relates to the technical field of bridge maintenance equipment, and discloses a jacking device for road and bridge maintenance, which comprises a hydraulic jack, the outer side wall of the hydraulic jack is fixedly connected with a first middle plate, and one end of a first connecting rod is hinged on the first middle plate; the second middle plate is fixedly connected to the movable end of the hydraulic jack, and the side wall of the second middle plate is rotationally connected with the middle of a middle connecting rod; one end of a second connecting rod is hinged to the top plate, the other end of the first connecting rod and the other end of the second connecting rod are rotationally connected with the two ends of the middle connecting rod correspondingly, and the first connecting rod, the middle connecting rod and the second connecting rod are integrally arranged in a Z shape; the limiting rod is in sliding connection with at least one of the second middle plate and the first middle plate in the vertical direction. On the basis that an existing bridge structure is not damaged, the lifting stroke of the jacking device is improved.

Description

Technical Field

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

[0002] Bridge bearings are important structural components that connect the superstructure and substructure of a bridge. They are located between the bridge and the pad stone. They can reliably transfer the load and deformation (displacement and rotation) borne by the superstructure of the bridge to the substructure of the bridge. They are important force transmission devices of the bridge. Since the bearings are the link connecting the bridges and bear the loads they carry for a long time, cracks are prone to appear. Disasters such as earthquakes can cause damage to the bearings. Therefore, defective bearings must be replaced in a timely manner to ensure the normal use of the bridge and driving safety.

[0003] The gap between the upper and lower structures of the bridge is small, and it is difficult for the arranged jacks to achieve a large stroke. When performing operations such as reinforcing and raising the bridge, there may be a process that requires intermittent raising and jacking, and it cannot be raised and lowered into place in one go, and the operation process is rather cumbersome.

[0004] In addition, the patent with announcement number CN217629493U discloses a synchronous jacking device for bridge bearings, which realizes the jacking process of the bridge superstructure by setting a jacking platform on the cap beam and setting a hydraulic jack on the jacking platform, and can realize the installation of jacks with larger strokes. However, during the use of this solution, the jacking platform needs to be fixed on the cap beam with anchor bolts, that is, it needs to be improved on the basis of the original cap beam, which increases the construction steps.

[0005] In view of this, how to improve the lifting stroke of the jacking device without damaging the existing bridge structure has become a technical problem that technical personnel in this field urgently need to solve. Utility Model Content

[0006] The utility model aims to provide a jacking device for road and bridge maintenance to overcome the above-mentioned shortcomings.

[0007] In order to achieve the above-mentioned purpose, the technical solution of the utility model is: a jacking device for road and bridge maintenance, comprising:

[0008] A hydraulic jack, wherein an outer side wall of the hydraulic jack is fixedly connected to a first middle plate, and one end of a first connecting rod is hinged to the first middle plate;

[0009] A second intermediate plate fixedly connected to the movable end of the hydraulic jack, wherein the side wall of the second intermediate plate is rotatably connected to the middle portion of the intermediate connecting rod; and

[0010] A top plate is located above the second intermediate plate, and one end of the second connecting rod is hinged on the top plate. The other end of the first connecting rod and the other end of the second connecting rod are rotatably connected to the two ends of the intermediate connecting rod respectively, and the first connecting rod, the intermediate connecting rod and the second connecting rod are arranged in a "Z" shape as a whole. The top plate is fixedly connected to a limit rod, and the limit rod is slidably connected to at least one of the second intermediate plate or the first intermediate plate in a vertical direction.

[0011] Furthermore, at least two groups of the first connecting rod, the intermediate connecting rod and the second connecting rod are arranged, respectively, on the front and rear sides of the second middle plate, and two of the first connecting rod, the intermediate connecting rod and the second connecting rod are arranged in each group. The two first connecting rods in each group are in an inverted "eight" shape, the two intermediate connecting rods in each group are in an "X" shape, and the two second connecting rods in each group are in an "eight" shape.

[0012] Furthermore, a connecting block is fixedly provided on the lower surface of the second intermediate plate, and the connecting block is hinged to one end of the second connecting rod.

[0013] Furthermore, both ends of the second middle plate are respectively fixedly connected with hollow sleeves, the lower surface of the top plate is fixedly connected with two limit rods, and the two limit rods and the two hollow sleeves are slidably connected in a one-to-one correspondence.

[0014] Furthermore, a support plate capable of adjusting an angle is provided on the upper surface of the top plate.

[0015] Furthermore, one end of the lower surface of the support plate is hinged to one end of the upper surface of the top plate, and the other end of the lower surface of the support plate is hinged to one end of a screw rod, and two nuts are threadedly connected to the screw rod, and the two nuts are respectively located at the upper and lower ends of the top plate.

[0016] Furthermore, a sliding groove is arranged on the top plate, and the screw rod is slidably connected to the sliding groove.

[0017] Furthermore, an anti-slip pad is fixedly connected to the upper surface of the support plate.

[0018] Furthermore, the bottom of the hydraulic jack is fixedly connected to a bottom plate, a lower surface of the bottom plate is provided with a slide groove, and a wedge block is slidably connected in the slide groove.

[0019] Compared with the prior art, the utility model has at least the following advantages:

[0020] When in the folded state, the hydraulic jack is in a contracted state. At this time, the first connecting rod, the middle connecting rod and the second connecting rod are close to each other, and the whole device is in a folded storage state. At this time, the volume of the jacking device is the smallest and can be placed between the upper structure and the lower structure of the bridge. When working, the hydraulic jack is in an extended state, the second middle plate moves upward, the distance between the first connecting rod and the second connecting rod continues to increase, and the distance between the top plate and the second middle plate also continues to increase. At this time, the first middle plate, the second middle plate and the top plate are in a spaced arrangement state, thereby achieving the effect of increasing the stroke of the hydraulic jack, and the one-time lifting stroke of the jack becomes larger, which can achieve the effect of reducing the padding operation or one-time lifting into place, reducing the construction steps. During the overall use of the utility model, the jacking device is always arranged between the lower structure and the upper structure of the bridge, and there is no need to use anchor bolts to fix it on the cap beam, and there is no damage to the existing bridge structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0022] Figure 1 This is a schematic diagram of the overall structure of the jacking device for road and bridge maintenance of the utility model;

[0023] Figure 2 This is a schematic diagram of the overall structure of the jacking device for road and bridge maintenance of the utility model from another perspective.

[0024] Figure numerals: 1. hydraulic jack; 2. first middle plate; 3. first connecting rod; 4. second middle plate; 5. middle connecting rod; 6. top plate; 7. second connecting rod; 8. limit rod; 9. connecting block; 10. hollow sleeve; 11. support plate; 12. screw; 13. nut; 14. sliding groove; 15. anti-slip pad; 16. bottom plate; 17. wedge block. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0026] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0027] Reference Figure 1-2 The utility model provides a jacking device for road bridge maintenance, which is applied between the upper structure and the lower structure of the bridge. The specific structure includes a hydraulic jack 1, a first middle plate 2, a second middle plate 4 and a top plate 6 which are arranged in sequence from bottom to top. Among them: the outer side wall of the hydraulic jack 1 is fixedly connected with the first middle plate 2, the first middle plate 2 and the movable end of the hydraulic jack 1 are clearance-matched, and one end of the first connecting rod 3 is hinged on the first middle plate 2; the second middle plate 4 is fixedly connected to the movable end of the hydraulic jack 1, the second middle plate 4 is arranged in the horizontal direction, the middle part of the middle connecting rod 5 is rotatably connected with the side wall of the second middle plate 4, and the middle connecting rod 5 is inclined; the top plate 6 is hinged with one end of the second connecting rod 7, the other end of the first connecting rod 3 and the other end of the second connecting rod 7 are rotatably connected with the two ends of the middle connecting rod 5 respectively, and the first connecting rod 3, the middle connecting rod 5 and the second connecting rod 7 are arranged in a "Z" shape as a whole, the top plate 6 is fixedly connected with the limit rod 8, the limit rod 8 is arranged in the vertical direction, and the limit rod 8 is slidably connected with at least one of the second middle plate 4 or the first middle plate 2 in the vertical direction.

[0028] When folded, the hydraulic jack 1 is in a contracted state, at which time the first connecting rod 3, the middle connecting rod 5 and the second connecting rod 7 are close to each other, and the whole device is in a retracted state. At this time, the volume of the jacking device is the smallest and can be placed between the upper structure and the lower structure of the bridge. When working, the hydraulic jack 1 is in an extended state, the second middle plate 4 moves upward, the distance between the first connecting rod 3 and the second connecting rod 7 is continuously increased, and at the same time, the distance between the top plate 6 and the second middle plate 4 is increased. The top plate 6 can support the upper structure of the bridge, thereby realizing the jacking process of the upper structure of the bridge. Through the above operation, the lifting stroke of the hydraulic jack 1 is increased, and the effect of jacking in place at one time can be achieved. When it is impossible to jack in place at one time, the process of repeated padding can also be reduced, which reduces the construction steps and improves work efficiency.

[0029] In order to improve the stability of the jacking structure of the utility model, at least two groups of first connecting rods 3, intermediate connecting rods 5 and second connecting rods 7 are provided. The two groups of first connecting rods 3, intermediate connecting rods 5 and second connecting rods 7 are respectively arranged on the front and rear sides of the second middle plate 4. The number of each group of first connecting rods 3, intermediate connecting rods 5 and second connecting rods 7 is provided with two. The two first connecting rods 3 in each group are in an inverted "eight" shape, the two intermediate connecting rods 5 in each group are in an "X" shape, and the middle parts of the two intermediate connecting rods 5 are rotatably connected, and the two second connecting rods 7 in each group are in an "eight" shape.

[0030] Preferably, a connecting block 9 is fixedly provided on the lower surface of the second middle plate 4 , and the connecting block 9 is hinged to one end of the second connecting rod 7 .

[0031] Specifically, two ends of the second middle plate 4 are respectively fixedly connected with hollow sleeves 10, two hollow sleeves 10 are provided, and are centrally symmetrically distributed along the axis of the hydraulic jack 1, and two limit rods 8 are fixedly connected to the lower surface of the top plate 6, and the limit rods 8 are also provided in the vertical direction, and the two limit rods 8 and the two hollow sleeves 10 are slidably connected in a one-to-one correspondence. By providing the limit rods 8 and the hollow sleeves 10, the stability of the jacking device of the utility model can be improved, and the support plate 11 can be prevented from being deflected in the left and right directions.

[0032] In actual operation, since the superstructure of the bridge may be slightly tilted, that is, there may be a loose fit between the top plate 6 and the superstructure of the bridge, a support plate 11 with an adjustable angle is provided on the upper surface of the top plate 6. By adjusting the angle of the support plate 11 and utilizing the support plate 11 and the superstructure of the bridge for support, a tight fit between the support plate 11 and the superstructure of the bridge can be achieved.

[0033] Optionally, an anti-skid pad 15 is fixedly connected to the upper surface of the support plate 11, and the anti-skid pad 15 plays an anti-skid role.

[0034] Specifically, one end of the lower surface of the support plate 11 is hinged to one end of the upper surface of the top plate 6, and one end of the screw rod 12 is hinged to the other end of the lower surface of the support plate 11, and two nuts 13 are threadedly connected to the screw rod 12, and the two nuts 13 are respectively located at the upper and lower ends of the top plate 6. A sliding groove 14 is arranged on the top plate 6, and the screw rod 12 is slidably connected to the sliding groove 14. By adjusting the positions of the two nuts 13 on the screw rod 12, the angle adjustment process of the support plate 11 can be achieved.

[0035] The upper surface of the bridge substructure may also be uneven, which will cause the hydraulic jack 1 placed on the bridge substructure to be unable to maintain a vertical state. In view of this, the bottom of the hydraulic jack 1 of the utility model is fixedly connected to a bottom plate 16, and a slide groove is provided on the lower surface of the bottom plate 16. The cross section of the slide groove along the vertical direction is a triangle, and a wedge block 17 is slidably connected in the slide groove. By adjusting the position of the wedge block 17 in the slide groove, the angle adjustment process of the bottom plate 16 can be achieved, thereby ensuring that the bottom plate 16 is in a horizontal state during the jacking process.

[0036] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside" and "outside" etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0037] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A jacking device for road and bridge maintenance, characterized in that: include: A hydraulic jack (1), wherein the outer side wall of the hydraulic jack (1) is fixedly connected to a first middle plate (2), and one end of a first connecting rod (3) is hinged to the first middle plate (2); A second intermediate plate (4) fixedly connected to the movable end of the hydraulic jack (1), the side wall of the second intermediate plate (4) being rotatably connected to the middle part of the intermediate connecting rod (5); and A top plate (6) is located above the second intermediate plate (4), and one end of a second connecting rod (7) is hingedly connected to the top plate (6). The other end of the first connecting rod (3) and the other end of the second connecting rod (7) are rotatably connected to two ends of the intermediate connecting rod (5) respectively, and the first connecting rod (3), the intermediate connecting rod (5) and the second connecting rod (7) are arranged in a "Z" shape as a whole. The top plate (6) is fixedly connected to a limiting rod (8), and the limiting rod (8) is slidably connected to at least one of the second intermediate plate (4) or the first intermediate plate (2) in a vertical direction.

2. The jacking device for road and bridge maintenance according to claim 1 is characterized in that: At least two groups of the first connecting rod (3), the intermediate connecting rod (5) and the second connecting rod (7) are provided. The two groups of the first connecting rod (3), the intermediate connecting rod (5) and the second connecting rod (7) are arranged on the front and rear sides of the second intermediate plate (4) respectively. The number of the first connecting rod (3), the intermediate connecting rod (5) and the second connecting rod (7) in each group is two. The two first connecting rods (3) in each group are in an inverted "eight" shape, the two intermediate connecting rods (5) in each group are in an "X" shape, and the two second connecting rods (7) in each group are in an "eight" shape.

3. The jacking device for road and bridge maintenance according to claim 2 is characterized in that: A connecting block (9) is fixedly provided on the lower surface of the second intermediate plate (4), and the connecting block (9) is hinged to one end of the second connecting rod (7).

4. The jacking device for road and bridge maintenance according to claim 3 is characterized in that: The two ends of the second intermediate plate (4) are respectively fixedly connected with hollow sleeves (10), and the lower surface of the top plate (6) is fixedly connected with two limit rods (8), and the two limit rods (8) and the two hollow sleeves (10) are slidably connected in a one-to-one correspondence.

5. The jacking device for road and bridge maintenance according to claim 1, characterized in that: A support plate (11) capable of adjusting an angle is provided on the upper surface of the top plate (6).

6. The jacking device for road and bridge maintenance according to claim 5, characterized in that: One end of the lower surface of the support plate (11) is hinged to one end of the upper surface of the top plate (6), and the other end of the lower surface of the support plate (11) is hinged to one end of a screw rod (12), and two nuts (13) are threadedly connected to the screw rod (12), and the two nuts (13) are respectively located at the upper and lower ends of the top plate (6).

7. The jacking device for road and bridge maintenance according to claim 6, characterized in that: The top plate (6) is provided with a sliding groove (14), and the screw rod (12) is slidably connected to the sliding groove (14).

8. The jacking device for road and bridge maintenance according to claim 7, characterized in that: An anti-slip pad (15) is fixedly connected to the upper surface of the support plate (11).

9. The jacking device for road and bridge maintenance according to claim 1, characterized in that: The bottom of the hydraulic jack (1) is fixedly connected to a bottom plate (16), the lower surface of the bottom plate (16) is provided with a slide groove, and a wedge block (17) is slidably connected in the slide groove.

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