Continuous jacking device for bridge

Abstract

The utility model relates to the technical field of bridge construction equipment, in particular to a continuous jacking device for a bridge, which comprises a jacking base, a first-stage jacking mechanism connected onto the jacking base, a second-stage jacking mechanism connected onto the first-stage jacking mechanism and an unfolding and folding support mechanism on the jacking base, and a lifting mechanism connected onto the second-stage jacking mechanism. A jacking distribution beam is mounted on the secondary jacking mechanism; the second-stage jacking mechanism comprises a plurality of electric push rods or hydraulic push rods, the bottoms of the electric push rods or the hydraulic push rods are assembled on the first-stage jacking mechanism, and the tops of the electric push rods or the hydraulic push rods are assembled on the jacking distribution beam. When the whole height of the bridge jacking device is increased to lift and jack a bridge, the unfolding and folding supporting mechanism is gradually expanded towards the outer side of the jacking base, so that the supporting range formed by matching of the jacking base and the unfolding and folding supporting mechanism is effectively expanded, the supporting stability is improved, and stable jacking of the bridge is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of bridge construction equipment, and more specifically to a continuous jacking device for a bridge. Background Art

[0002] Bridge jacking refers to a new type of bridge maintenance technology that uses hydraulic and other jacking devices to raise the main load-bearing structure of the bridge without changing the original shape of the bridge, thereby maintaining the bridge while ensuring that the bridge is passable. The bridge jacking technology adopts an overall hydraulic synchronous lifting scheme, that is, the original cast-in-place piles are used to bear the weight, and the original bridge deck pavement, railings, sidewalks, and beam-slab connections are not damaged. The "liquid lifting" device is first used to support the bridge superstructure as a whole, and then the columns under the piers and cap beams are cut off, and then the "liquid lifting" device is operated to raise the bridge as a whole to the designed height, and finally the column steel bars are extended to form molds for pouring the second phase of concrete. The overall hydraulic synchronous lifting scheme is adopted, that is, the original cast-in-place piles are used to bear the weight, and the original bridge deck pavement, railings, sidewalks, and beam-slab connections are not damaged. The "liquid lifting" device is first used to support the bridge superstructure as a whole, and then the columns under the piers and cap beams are cut off, and then the "liquid lifting" device is operated to raise the bridge as a whole to the designed height, and finally the column steel bars are extended to form molds for pouring the second phase of concrete.

[0003] The jacking device in the prior art has the following problems. When the jacking device in the prior art is jacking a bridge, the overall support area of ​​its supporting structure is relatively fixed, and it is impossible to expand the support range after the overall height of the bridge and the jacking device is increased. For example, a bridge on-site installation jacking and transfer equipment with patent number CN201910744433.0 includes a machine base, and a lifting cylinder, a translation cylinder and a support seat arranged on the machine base. The lifting rod of the lifting cylinder moves up and down in the vertical direction, and the telescopic rod of the translation cylinder is connected to the support seat to drive the support seat to move back and forth to approach or move away from the lifting cylinder; the top of the support seat is a first support surface, and the top of the jacking rod is provided with a second support surface. When the lifting rod of the lifting cylinder is retracted downward, the height of the first support surface is higher than the height of the second support surface, and when the lifting rod of the lifting cylinder is fully extended upward, the height of the first support surface is lower than the height of the second support surface. Although the jacking and transfer equipment can be used for jacking construction of the bridge, the support range of its machine base is fixed. After the bridge is raised, the stability of the support is easily affected, and the support stability after the overall height of the bridge and the jacking device is increased cannot be guaranteed. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a continuous jacking device for a bridge.

[0005] The utility model discloses a continuous jacking device for a bridge, and the technical scheme adopted is: a continuous jacking device for a bridge comprises: a jacking base, a first-level jacking mechanism is connected to the jacking base, the first-level jacking mechanism is connected to the expansion and contraction support mechanism on the jacking base, the first-level jacking mechanism is connected to the second-level jacking mechanism; a jacking distribution beam is installed on the second-level jacking mechanism; the second-level jacking mechanism comprises a plurality of electric push rods or hydraulic push rods, the bottoms of the plurality of electric push rods or hydraulic push rods are assembled on the first-level jacking mechanism, and the tops of the plurality of electric push rods or hydraulic push rods are assembled on the jacking distribution beam.

[0006] Furthermore, the first-level lifting mechanism includes a lifting support, the lifting support is fixed on the lifting screw, the lifting screw is threaded on the inner thread groove of the rotating branch pipe, the rotating branch pipe is rotatably arranged in the center hole of the lifting base, the sprocket 1 fixed to the rotating branch pipe is connected to the sprocket 2 installed on the power motor through a chain, and the power motor is installed on the lifting base; the lifting support is fixed on the lifting slide shaft, and the lifting slide shaft is slid in the support sleeve on the lifting base; there are four lifting slide shafts and four support sleeves, and the four lifting slide shafts are fixed at the four corners of the lifting support; the four support sleeves are fixed at the four corners of the lifting base.

[0007] Furthermore, the deployment and retraction support mechanism includes a deployment and retraction linkage seat screwed on the external threaded surface of the rotating branch pipe, four deployment and retraction connecting rods rotated on the deployment and retraction linkage seat are rotatably connected to four deployment and retraction slides slidably arranged in the four side slide grooves of the jacking base, and the ends of the four deployment and retraction slides extending to the outside of the jacking base are all rotated with a rotating cross tube, and the rotating cross tube is fixedly connected to the deployment and retraction roller; there are two deployment and retraction rollers, and the bottom surfaces of the two deployment and retraction rollers fixedly connected to the rotating cross tube are coplanar with the lower surface of the jacking base.

[0008] Furthermore, a limit block is fixed on the expansion and retraction slide frame, and the limit block is slidably arranged in a limit groove on the upper surface of the jacking base, and the limit groove is connected to the side slide groove; the limit block is rotatably connected to a transverse rotating tube, and the inner thread of the transverse rotating tube is connected to two oppositely arranged width adjustment screws, and the two width adjustment screws are fixed to the inner ends of the two width adjustment brackets, and the outer ends of the two width adjustment brackets are rotatably connected to the two width adjustment sliding shafts, and the inner ends of the two width adjustment sliding shafts slide relatively in the rotating transverse tube.

[0009] Furthermore, the outer ends of the two width-adjusting sliding shafts are connected to outer supporting wheels, and the two outer supporting wheels are relatively arranged on both sides of the unfolding and retracting sliding frame; the gear fixed on the transverse rotating tube is meshed with the rack fixed on the jacking base.

[0010] It can be seen from the above scheme that compared with the traditional jacking device, the continuous jacking device for a bridge of the utility model is provided with an expansion and retraction support mechanism inside. When the overall height of the utility model is increased to lift the bridge, the expansion and retraction support mechanism gradually expands toward the outside of the jacking base, thereby effectively expanding the support range formed by the cooperation of the jacking base and the expansion and retraction support mechanism, improving the stability of the support, and ensuring the stable jacking of the bridge; after jacking, when the overall height of the utility model is gradually reduced, the expansion and retraction support mechanism gradually shrinks toward the inside of the jacking base, reducing the overall volume, which is convenient for transportation or movement.

[0011] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, preferred embodiments are given below and described in detail with reference to the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0013] Figure 1 The overall schematic diagram provided for the embodiment of the utility model Figure 1 ;

[0014] Figure 2 The overall schematic diagram provided for the embodiment of the utility model Figure 2 ;

[0015] Figure 3 A schematic diagram of the structure of a lifting base provided in an embodiment of the utility model;

[0016] Figure 4 A schematic diagram of the structure of a first-level lifting mechanism provided in an embodiment of the utility model;

[0017] Figure 5 A schematic diagram of the structure of the unfolding and retracting support mechanism provided in an embodiment of the utility model;

[0018] Figure 6 A partial schematic diagram of the deployment support mechanism provided in an embodiment of the utility model.

[0019] Icons: jacking base 1; rack 101; primary jacking mechanism 2; jacking support 201; jacking screw 202; rotating branch pipe 203; jacking slide shaft 204; support sleeve 205; deployment support mechanism 3; deployment linkage seat 301; deployment connecting rod 302; deployment slide 303; rotating cross pipe 304; deployment roller 305; limit block 306; transverse rotating pipe 307; width adjustment screw 308; width adjustment bracket 309; width adjustment slide shaft 310; outer support wheel 311; gear 312; secondary jacking mechanism 4; jacking distribution beam 5. DETAILED DESCRIPTION

[0020] In order to clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the drawings in the embodiments of the present invention, it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0021] It should be understood that the terms such as “having”, “including” and “comprising” used herein do not exclude the existence or addition of one or more other elements or combinations thereof.

[0022] See also Figure 1-6 The utility model provides a continuous jacking device for a bridge, comprising: a jacking base 1, a first-level jacking mechanism 2 is connected to the jacking base 1, the first-level jacking mechanism 2 is connected to the expansion and contraction support mechanism 3 on the jacking base 1, the first-level jacking mechanism 2 is connected to the second-level jacking mechanism 4; and a jacking distribution beam 5 is installed on the second-level jacking mechanism 4.

[0023] The utility model provides a continuous jacking device for a bridge. When the bridge is jacked up, the jacking base 1 is set in a flat position and can be positioned and fixed by positioning anchor rods to improve the stability of the support; then the jacking distribution beam 5 is controlled to contact with the bridge to be jacked or connected through a connecting device; then the first-level jacking mechanism 2 is controlled to start, and the second-level jacking mechanism 4 and the jacking distribution beam 5 are controlled to rise by the first-level jacking mechanism 2, so that the bridge is initially raised by the jacking distribution beam 5. After the first-level jacking mechanism 2 reaches the maximum stroke, the second-level jacking mechanism 4 is controlled to start, and the second-level jacking mechanism 4 drives the bridge to be further raised by the jacking distribution beam 5. Through the cooperation of the first-level jacking mechanism 2 and the second-level jacking mechanism 4, the bridge is effectively lifted. The beam is continuously lifted, which improves the lifting construction effect of the bridge, and when the first-level lifting mechanism 2 controls the second-level lifting mechanism 4 and the lifting distribution beam 5 to rise, it can also synchronously drive and control the expansion and contraction support mechanism 3 on the lifting base 1 to move, thereby improving the stability of the support of the utility model; when the overall height of the utility model is increased to lift the bridge, the expansion and contraction support mechanism 3 gradually expands toward the outside of the lifting base 1, thereby effectively expanding the support range formed by the lifting base 1 and the expansion and contraction support mechanism 3, improving the stability of the support, and ensuring the stable lifting of the bridge; after jacking, when the overall height of the utility model is gradually reduced, the expansion and contraction support mechanism 3 gradually shrinks toward the inside of the lifting base 1, reducing the overall volume, which is convenient for transportation or movement.

[0024] The secondary jacking mechanism 4 includes multiple electric push rods or hydraulic push rods, the bottoms of the multiple electric push rods or hydraulic push rods are assembled on the primary jacking mechanism 2, and the tops of the multiple electric push rods or hydraulic push rods are assembled on the jacking distribution beam 5. They can be selected according to actual needs to ensure that the bridge can be jacked. The secondary jacking mechanism 4 can also be a jack to meet the usage requirements in different situations.

[0025] The first-level lifting mechanism 2 includes a lifting support 201, and the lifting support 201 is connected to the second-level lifting mechanism 4. The lifting support 201 is fixed on the lifting screw 202, and the lifting screw 202 is screwed on the internal thread groove of the rotating branch pipe 203. The rotating branch pipe 203 is rotated in the center hole of the lifting base 1, and the sprocket wheel 1 fixed to the rotating branch pipe 203 is connected to the sprocket wheel 2 installed on the power motor through a chain; the lifting support 201 is fixed on the lifting sliding shaft 204, and the lifting sliding shaft 204 is slidably set in the support sleeve 205 on the lifting base 1. The first-level jacking mechanism 2 is used for preliminary jacking construction. The lifting support 201 is raised and lowered to drive the second-level jacking mechanism 4 and the jacking distribution beam 5 to rise and fall. When adjusting the height of the jacking support 201, the power motor is controlled to start. When the sprocket 2 on the power motor rotates, the sprocket 1 on the rotating branch pipe 203 is driven to rotate through the chain, thereby controlling the rotation of the rotating branch pipe 203. When the rotating branch pipe 203 rotates, its contact position with the jacking screw 202 can be changed, thereby driving the jacking support 201 to rise or fall through the jacking screw 202. The jacking support 201 drives the jacking sliding shaft 204 to slide in the support sleeve 205 on the jacking base 1 in the up and down directions, thereby playing the role of guiding and limiting through the cooperation of the support sleeve 205 and the jacking sliding shaft 204 to play the role of stabilizing the support. The structural setting of the first-level jacking mechanism 2 makes the utility model more suitable for small bridges with smaller volume and lighter weight, and has better stability.

[0026] There are four lifting slide shafts 204 and four supporting sleeves 205. The four lifting slide shafts 204 are fixedly connected to the four corners of the lifting support 201; the four supporting sleeves 205 are fixedly connected to the four corners of the lifting base 1. The setting of this structure is conducive to improving the supporting stability of the first-level lifting mechanism 2.

[0027] The deployment and retraction support mechanism 3 includes a deployment and retraction linkage seat 301 screwed on the external thread surface of the rotating branch pipe 203, four deployment and retraction connecting rods 302 rotated on the deployment and retraction linkage seat 301 and are rotatably connected one by one with four deployment and retraction slides 303 slidably arranged in the four side slide grooves of the jacking base 1, and the ends of the four deployment and retraction slides 303 extending to the outside of the jacking base 1 are all rotated with a rotating cross tube 304, and the rotating cross tube 304 is fixedly connected to the deployment and retraction rollers 305, and two deployment and retraction rollers 305 are provided, and the bottom surfaces of the two deployment and retraction rollers 305 fixedly connected to the rotating cross tube 304 are coplanar with the lower surface of the jacking base 1.

[0028] When the rotating branch pipe 203 rotates, the contact position between the rotating branch pipe 203 and the unfolding linkage seat 301 can be changed synchronously, so as to control the raising or lowering of the unfolding linkage seat 301. When the level of the lifting screw rod 202 rises, the level of the unfolding linkage seat 301 decreases, thereby driving one end of the four unfolding and retracting connecting rods 302 to move downward, and the other end of the four unfolding and retracting connecting rods 302 drives the four unfolding and retracting slides 303 to slide outward in the four side slide grooves of the lifting base 1, thereby expanding the jacking base 1 and the unfolding and retracting support mechanism 3 formed by the cooperation of the utility model. The support range is increased to improve the stability of the support and ensure the stable lifting of the bridge; when the horizontal height of the lifting screw 202 is reduced, the horizontal height of the deployment linkage seat 301 is increased, thereby driving the four deployment slides 303 to slide inward in the four side slide grooves of the lifting base 1 through the four deployment links 302, and the deployment support mechanism 3 gradually shrinks toward the inside of the lifting base 1 to reduce the overall volume for easy transportation or movement; the deployment roller 305 is fixedly connected to the rotating cross tube 304 to reduce the friction resistance of the support to the outside and facilitate sliding in or out.

[0029] The stowage slide 303 is fixed with a limit block 306, which is slidably arranged in a limit groove on the upper surface of the lifting base 1, and the limit groove is connected to the side slide groove. The setting of the limit block 306 can prevent the stowage slide 303 from being separated from the lifting base 1, thereby improving the overall stability of the utility model.

[0030] The limit block 306 is rotatably connected to the transverse rotating tube 307, and the internal thread of the transverse rotating tube 307 is connected to two oppositely arranged width adjustment screws 308, and the two width adjustment screws 308 are fixed to the inner ends of the two width adjustment brackets 309, and the outer ends of the two width adjustment brackets 309 are rotatably connected to the two width adjustment sliding shafts 310, and the inner ends of the two width adjustment sliding shafts 310 slide relatively in the rotating transverse tube 304; the outer ends of the two width adjustment sliding shafts 310 are connected to the outer support wheels 311, and the two outer support wheels 311 are relatively arranged on both sides of the extension and retraction slide 303.

[0031] In order to further improve the support stability, the above structure is designed. During operation, rotating the transverse rotating tube 307 can change the contact position between the transverse rotating tube 307 and the two width adjusting screws 308, thereby controlling the two width adjusting screws 308 to move closer to or away from each other. When it is necessary to improve the stability, the two width adjusting screws 308 are controlled to move away from each other, and the outer ends of the two width adjusting screws 308 drive the two width adjusting brackets 309 to move away from each other outwardly. When the two width adjusting brackets 309 move outwardly, they drive the two width adjusting sliding shafts 310 to move outwardly. The two width adjusting sliding shafts 310 drive the outer support wheels 311 on both sides to move outwardly, thereby further enhancing stability.

[0032] The gear 312 fixed on the transverse rotating tube 307 is meshed with the rack 101 fixed on the jacking base 1. When the stowage slide 303 slides outward, the transverse rotating tube 307 is driven to move outward through the limit block 306. The gear 312 contacts with different positions of the rack 101, thereby driving the gear 312 to rotate around its own axis. When the gear 312 rotates, it also drives the transverse rotating tube 307 to rotate. When the stowage slide 303 expands outward, the two width-adjusting brackets 309 are synchronously controlled to move outward, and the two width-adjusting sliding shafts 310 are driven to move outward, thereby improving the supporting effect.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element 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.

[0034] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0035] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation modes. It can be fully applied to various fields suitable for the utility model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described herein.

Claims

1. A continuous lifting device for a bridge, characterized in that: include: A lifting base (1) is provided, the lifting base (1) is connected to a first-level lifting mechanism (2), the first-level lifting mechanism (2) is connected to an expansion and contraction support mechanism (3) on the lifting base (1), the first-level lifting mechanism (2) is connected to a second-level lifting mechanism (4), and a lifting distribution beam (5) is installed on the second-level lifting mechanism (4).

2. A continuous lifting device for a bridge according to claim 1, characterized in that: The secondary lifting mechanism (4) comprises a plurality of electric push rods or hydraulic push rods, the bottoms of the plurality of electric push rods or hydraulic push rods are mounted on the primary lifting mechanism (2), and the tops of the plurality of electric push rods or hydraulic push rods are mounted on the lifting distribution beam (5).

3. The continuous lifting device for a bridge according to claim 1, characterized in that: The primary lifting mechanism (2) comprises a lifting support (201), the lifting support (201) is fixed on the lifting screw (202), the lifting screw (202) is screwed on the internal thread groove of the rotating branch pipe (203), the rotating branch pipe (203) is rotated in the central hole of the lifting base (1), and the sprocket wheel 1 fixed to the rotating branch pipe (203) is connected to the sprocket wheel 2 installed on the power motor through a chain; the lifting support (201) is fixed on the lifting sliding shaft (204), and the lifting sliding shaft (204) is slidably arranged in the support sleeve (205) on the lifting base (1).

4. The continuous lifting device for a bridge according to claim 3, characterized in that: The lifting sliding shafts (204) and the supporting sleeves (205) are each provided with four, and the four lifting sliding shafts (204) are fixedly connected to the four corners of the lifting support (201); and the four supporting sleeves (205) are fixedly connected to the four corners of the lifting base (1).

5. The continuous lifting device for a bridge according to claim 4, characterized in that: The deployment support mechanism (3) comprises a deployment linkage seat (301) threadedly connected to the external thread surface of the rotating branch pipe (203), four deployment connecting rods (302) rotated on the deployment linkage seat (301) and rotatably connected to four deployment slides (303) slidably arranged in the four side slide grooves of the jacking base (1), and the ends of the four deployment slides (303) extending to the outside of the jacking base (1) are all rotated with a rotating transverse tube (304), and the deployment roller (305) is fixedly connected to the rotating transverse tube (304).

6. The continuous lifting device for a bridge according to claim 5, characterized in that: Two unfolding and retracting rollers (305) are provided, and the bottom surfaces of the two unfolding and retracting rollers (305) fixedly connected to the rotating transverse tube (304) are coplanar with the lower surface of the lifting base (1).

7. The continuous lifting device for a bridge according to claim 5, characterized in that: A limit block (306) is fixedly connected to the stowage slide frame (303), and the limit block (306) is slidably arranged in a limit groove on the upper surface of the lifting base (1), and the limit groove is communicated with the side slide groove.

8. The continuous lifting device for a bridge according to claim 7, characterized in that: The limit block (306) is rotatably connected to a transverse rotating tube (307), the transverse rotating tube (307) is internally threadedly connected to two width-adjusting screws (308) arranged opposite to each other, the two width-adjusting screws (308) are fixedly connected to the inner ends of two width-adjusting brackets (309), the outer ends of the two width-adjusting brackets (309) are rotatably connected to two width-adjusting sliding shafts (310), and the inner ends of the two width-adjusting sliding shafts (310) slide relatively in the rotating transverse tube (304).

9. The continuous lifting device for a bridge according to claim 8, characterized in that: The outer ends of the two width-adjusting sliding shafts (310) are both connected to outer supporting wheels (311), and the two outer supporting wheels (311) are arranged oppositely on two sides of the unfolding and retracting sliding frame (303).

10. The continuous lifting device for a bridge according to claim 9, characterized in that: The gear (312) fixed on the transverse rotating tube (307) meshes with the rack (101) fixed on the lifting base (1).

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