Incremental launching construction auxiliary device

Abstract

The utility model relates to a pushing construction auxiliary device which comprises a connecting block, a supporting plate is arranged at the upper end of the connecting block, a hemispherical block is fixed to the middle of the lower end face of the supporting plate, a hemispherical groove is formed in the middle of the upper end face of the connecting block, a plurality of first blind holes are evenly formed in the upper end face of the connecting block along the circumference, and a pushing block is arranged in each first blind hole. A second blind hole is formed in the lower end face of the connecting block, a piston block is arranged in the second blind hole, the upper end of the second blind hole communicates with the lower end of each first blind hole, and a cavity between the piston block and each ejector block is filled with hydraulic oil. Hydraulic oil in the first blind hole cannot flow back into the second blind hole; the supporting plate and the hemispherical block can freely rotate on the groove, so that the supporting plate can be attached to the box girder under the condition that the lower end face of the box girder is uneven or low in levelness, the contact area between the supporting plate and the box girder is increased, and the jacking effect of the jack is more stable.

Description

Technical Field

[0001] The utility model relates to the field of bridge construction, in particular to a jacking construction auxiliary device. Background Art

[0002] During the jacking construction of a bridge, multiple groups of hydraulic jacks are required to synchronously support the box girder. In addition, during the transverse movement of the box girder, the same jack needs to support different positions of the lower end face of the box girder. In order to improve the stability of the jacking, a support pad that can increase the contact area with the box girder is usually set at the upper end of the hydraulic rod. However, during the actual construction process, it is difficult to ensure that the upper end face of the hydraulic rod is parallel to the lower end face of the box girder, resulting in line-surface contact between the jacking structure and the box girder during the jacking process, causing the force-bearing surface of the box girder jacking point to deflect and stress concentration, affecting the jacking construction accuracy and reducing the service life of the jacking equipment.

[0003] In the prior art, announcement number CN210150646U discloses a support jack for steel bridge jacking construction. A horizontally swingable steel liner is provided above the jack body so that the upper top plate can fit with the bottom of the beam with different inclinations to ensure the stability of the support. However, this solution still has the following problems: 1. The steel liner, as a load-bearing component, is prone to deformation, affecting the reliability of the rotational fit; 2. The force point of the steel liner is located in the middle, where the force is concentrated and the support stability is poor. Utility Model Content

[0004] In view of the above situation, in order to overcome the defects of the prior art, the utility model adopts a jacking construction auxiliary device to solve the problems of skewness and stress concentration of the jacking construction force surface in the prior art.

[0005] The technical solution is a jacking construction auxiliary device, comprising a connecting block, which is a tapered block that is wide at the top and narrow at the bottom. A support plate is provided at the upper end of the connecting block, and a hemispherical block is fixed in the middle of the lower end surface of the support plate. A hemispherical groove is provided in the middle of the upper end surface of the connecting block, and the hemispherical block is placed in the groove and can rotate freely; a plurality of first blind holes are evenly provided along the circumference of the upper end surface of the connecting block, and a top block that can slide up and down is provided in each first blind hole, a second blind hole is provided on the lower end surface of the connecting block, and a piston block that can slide up and down is provided in the second blind hole, and the upper ends of the second blind holes are respectively communicated with the lower ends of each first blind hole, and the cavity between the piston block and each top block is filled with hydraulic oil. When all the top blocks are in contact with the lower end surface of the support plate, the hydraulic oil in the first blind hole cannot flow back into the second blind hole.

[0006] The outer edge surfaces of the top block and the piston block are both provided with high-pressure sealing rings, which are tightly fitted with the inner walls of the first blind hole and the second blind hole.

[0007] The upper end surface of the second blind hole is provided with a plurality of vertical holes, which correspond to the first blind holes one by one. The upper ends of the vertical holes are provided with communicating holes which communicate with the bottoms of the corresponding first blind holes.

[0008] The piston block is provided with multiple through holes, which have the same diameter as the vertical holes and correspond in position to each other. A horizontal plate is provided in the lower cavity of the piston block, and multiple vertical rods are fixed on the horizontal plate. The outer diameter of the vertical rods is smaller than the inner diameter of the through holes and the upper ends extend out of the upper end surfaces of the through holes. High-pressure sealing rings are provided on the vertical holes and the inner edge surfaces of the through holes, and the high-pressure sealing rings can fit tightly with the outer walls of the vertical rods.

[0009] A compression spring is provided between the piston block and the upper end surface of the second blind hole, and the compression spring enables the piston block to always be located at the lower side of the second blind hole when no external force is applied.

[0010] The transverse plate and the piston block are connected via a spring.

[0011] The horizontal plate is provided with a plurality of air holes penetrating the upper and lower end surfaces.

[0012] When the piston block moves from the lowermost end to the uppermost end of the second blind hole, the volume reduction between the second blind hole and the piston block is equal to the volume increase between the first blind hole and the top block when all the top blocks move from the lowermost end of the first blind hole to contact with the lower end surface of the support plate.

[0013] Compared with the prior art, the present invention has the following advantages:

[0014] 1. By arranging the support plate and the hemispherical block to rotate freely on the groove, the support plate can fit with the box beam even when the lower end surface of the box beam is uneven or the levelness is low, thereby increasing the contact area with the box beam and making the supporting effect of the jack more stable;

[0015] 2. By setting up multiple groups of top blocks evenly distributed along the circumference to assist in supporting the support plate, the force of the hemispherical block of the rotating part is shared, ensuring the reliability of the rotation fit while avoiding stress concentration, thereby extending the overall service life of the device;

[0016] 3. The hydraulic rod drives the horizontal plate to push upward, which enables the piston block to compress the upper cavity of the second blind hole, completing the upward extension of the top block. Then, the vertical rod blocks the vertical hole, preventing the top block from returning to its original position and continuously providing support force to the support plate, thereby ensuring the stability of the support plate in supporting the box beam.

[0017] 4. The compression spring and the rebound force of the spring can reset the top block and the piston block after the support plate is separated from the box beam, which is convenient for repeated support construction. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the main view of the utility model.

[0019] Figure 2 It is a main sectional view of the present utility model.

[0020] Figure 3 This is a main sectional view of the utility model when supporting the box beam.

[0021] Figure 4 This is a top view of the connecting block of the utility model. DETAILED DESCRIPTION

[0022] The specific implementation of the present invention is further described in detail below with reference to the accompanying drawings.

[0023] Depend on Figures 1 to 4 It is given that the utility model includes a connecting block 1, which is a conical block that is wide at the top and narrow at the bottom. A support plate 2 is provided at the upper end of the connecting block 1, and a hemispherical block 3 is fixed in the middle of the lower end surface of the support plate 2. A hemispherical groove 4 is provided in the middle of the upper end surface of the connecting block 1, and the hemispherical block 3 is placed in the groove 4 and can rotate freely; a plurality of first blind holes 5 are evenly provided along the circumference of the upper end surface of the connecting block 1, and a top block 6 that can slide up and down is provided in each first blind hole 5, and a second blind hole 7 is provided on the lower end surface of the connecting block 1, and a piston block 8 that can slide up and down is provided in the second blind hole 7, and the upper ends of the second blind holes 7 are respectively communicated with the lower ends of each first blind hole 5, and the cavity between the piston block 8 and each top block 6 is filled with hydraulic oil. When all the top blocks 6 are in contact with the lower end surface of the support plate 2, the hydraulic oil in the first blind hole 5 cannot flow back to the second blind hole 7.

[0024] The outer edge surfaces of the top block 6 and the piston block 8 are both provided with high-pressure sealing rings, which are tightly fitted with the inner walls of the first blind hole 5 and the second blind hole 7 .

[0025] A plurality of vertical holes 9 are formed on the upper end surface of the second blind hole 7 , and the vertical holes 9 correspond to the first blind holes 5 one by one. A connecting hole 10 is formed on the upper end of the vertical hole 9 and is connected to the bottom of the corresponding first blind hole 5 .

[0026] The piston block 8 is provided with a plurality of through holes 11, which have the same aperture as the vertical holes 9 and correspond in position to each other. A horizontal plate 12 is provided in the lower cavity of the piston block 8, and a plurality of vertical rods 13 are fixed on the horizontal plate 12. The outer diameter of the vertical rod 13 is smaller than the inner diameter of the through hole 11 and the upper end extends out of the upper end surface of the through hole 11. The inner edge surfaces of the vertical holes 9 and the through hole 11 are provided with high-pressure sealing rings, which can fit tightly with the outer wall of the vertical rod 13.

[0027] A compression spring is provided between the piston block 8 and the upper end surface of the second blind hole 7 , and the compression spring ensures that the piston block 8 is always located at the lower side of the second blind hole 7 in the absence of external force.

[0028] The transverse plate 12 and the piston block 8 are connected via a spring.

[0029] The horizontal plate 12 is provided with a plurality of air holes 14 penetrating the upper and lower end surfaces.

[0030] When the piston block 8 moves from the lowermost end to the uppermost end of the second blind hole 7, the reduction in volume between the second blind hole 7 and the piston block 8 is equal to the increase in volume between the first blind hole 5 and the top block 6 when all the top blocks 6 move from the lowermost end of the first blind hole 5 to the point where they come into contact with the lower end surface of the support plate 2.

[0031] When the utility model is in use, first make the piston block 8 be located at the lowest end, then place the connecting block 1 on the upper side of the hydraulic rod of the jack, make the upper end of the hydraulic rod be placed in the second blind hole 7 and contact with the cross plate 12, when the jack is started to support the box beam, the support plate 2 first contacts with the lower end surface of the box beam, because the support plate 2 can fully adapt to the horizontal inclination angle of the lower end surface of the box beam and fit with it through the relative rotation of the hemispherical block 3 and the groove 4, the jack continues to lift, because the support plate 2 is blocked by the box beam and cannot move upward, the piston block 8 can move upward relative to the second blind hole 7 under the action of the resistance of the vertical rod 13 and the spring thrust, and compress the upper side cavity of the second blind hole 7, so that the hydraulic oil enters the first blind hole 5 through the vertical hole 9 and the connecting hole 10, and all the top blocks 6 move upward along the first blind hole 5. Since there is a certain horizontal angle between the support plate 1 and the upper end surface of the connecting block 1, the support plate 2 first contacts with the support plate 2. When the hydraulic rod is reset downward until the support plate 2 is separated from the box beam, the piston block 8 can be reset under the action of the compression spring, which is convenient for the next stage of support.

[0032] The utility model is provided with a support plate 2 and a hemispherical block 3 that can rotate freely on the groove 4, so that the support plate 2 can fit with the box beam when the lower end surface of the box beam is uneven or low in level, thereby increasing the contact area with the box beam and making the jacking effect more stable; by providing multiple groups of top blocks 6 evenly distributed along the circumference to assist in supporting the support plate 2, the force of the rotating hemispherical block 3 is shared, ensuring the reliability of the rotation fit while avoiding stress concentration, thereby extending the overall service life of the device; by the hydraulic rod driving the cross plate 12 to push upward, the piston block 8 can compress the upper cavity of the second blind hole 7, completing the upward extension of the top block 6, and then the vertical rod 13 blocks the vertical hole 9, so that the top block 6 cannot be reset downward, and continues to provide supporting force to the support plate 2, so that the support plate 2 can stabilize the box beam; by the compression spring and the rebound force of the spring, the top block 6 and the piston block 8 can be reset after the support plate 2 is separated from the box beam, which is convenient for repeated use of the support construction.

Claims

1. A jacking construction auxiliary device, comprising a connecting block (1), characterized in that: The connecting block (1) is a tapered block that is wide at the top and narrow at the bottom. A support plate (2) is provided at the top of the connecting block (1). A hemispherical block (3) is fixed in the middle of the lower end surface of the support plate (2). A hemispherical groove (4) is provided in the middle of the upper end surface of the connecting block (1). The hemispherical block (3) is placed in the groove (4) and can rotate freely. A plurality of first blind holes (5) are evenly provided along the circumference of the upper end surface of the connecting block (1). A top block (6) that can slide up and down is provided in each first blind hole (5). A second blind hole (7) is provided at the lower end surface of the connecting block (1). A piston block (8) that can slide up and down is provided in the second blind hole (7). The upper end of the second blind hole (7) is communicated with the lower end of each first blind hole (5). The cavity between the piston block (8) and each top block (6) is filled with hydraulic oil. When all the top blocks (6) are in contact with the lower end surface of the support plate (2), the hydraulic oil in the first blind hole (5) cannot flow back into the second blind hole (7).

2. A jacking construction auxiliary device according to claim 1, characterized in that: The outer edge surfaces of the top block (6) and the piston block (8) are both provided with high-pressure sealing rings, which are tightly fitted with the inner walls of the first blind hole (5) and the second blind hole (7).

3. The jacking construction auxiliary device according to claim 1, characterized in that: The upper end surface of the second blind hole (7) is provided with a plurality of vertical holes (9), the vertical holes (9) corresponding to the first blind holes (5) one by one, and the upper end of the vertical hole (9) is provided with a connecting hole (10) connected to the bottom of the corresponding first blind hole (5).

4. The jacking construction auxiliary device according to claim 3, characterized in that: The piston block (8) is provided with a plurality of through holes (11), the through holes (11) and the vertical holes (9) have the same aperture and are positioned one-to-one with each other, a horizontal plate (12) is provided on the lower cavity of the piston block (8), a plurality of vertical rods (13) are fixed on the horizontal plate (12), the outer diameter of the vertical rods (13) is smaller than the inner diameter of the through holes (11) and the upper ends extend out of the upper end surfaces of the through holes (11), and high-pressure sealing rings are provided on the inner edge surfaces of the vertical holes (9) and the through holes (11), and the high-pressure sealing rings can fit tightly with the outer walls of the vertical rods (13).

5. The jacking construction auxiliary device according to claim 4, characterized in that: A compression spring is provided between the piston block (8) and the upper end surface of the second blind hole (7), and the compression spring enables the piston block (8) to always be located at the lower side of the second blind hole (7) when no external force is applied.

6. The jacking construction auxiliary device according to claim 4, characterized in that: The transverse plate (12) and the piston block (8) are connected via a spring.

7. The jacking construction auxiliary device according to claim 4, characterized in that: The horizontal plate (12) is provided with a plurality of air holes (14) penetrating the upper and lower end surfaces.

8. The jacking construction auxiliary device according to claim 1, characterized in that: The amount of volume reduction between the second blind hole (7) and the piston block (8) when the piston block (8) moves from the lowermost end to the uppermost end of the second blind hole (7) is equal to the amount of volume increase between the first blind hole (5) and the top block (6) when all the top blocks (6) move from the lowermost end of the first blind hole (5) to the point where they come into contact with the lower end surface of the support plate (2).

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