CN211286703U - Device for integrally and synchronously jacking steel structure net rack - Google Patents

Abstract

The utility model discloses a device for whole synchronous jacking of steel construction rack, including cross joist and jacking frame thereof, the cross joist includes four cantilever beams that are "ten" font level and arrange the rigid coupling has net rack upper chord ball to hold on the cantilever of cantilever beam the middle part below of cross joist is equipped with the hemisphere hinged-support rather than the rigid coupling, the jacking frame includes jack and support body, the support body includes from last to the top support of coaxial setting in proper order down, initial festival, multistage standard festival and base, the jack is adorned admittedly the jacking is gradually economized through the universal top layer board on the base the support body top hold in the palm the top be equipped with the anastomotic jacking ball of hemisphere hinged-support holds in the palm. The utility model discloses a three articulated supports can prevent that jacking in-process from taking place the jack cylinder damage that the incline caused because of the jacking frame, eliminates jacking in-process rack weight eccentric's influence, makes the jacking counter-force of each jacking point relatively even, guarantees that the whole jacking of rack is stable.

Description

A device for overall synchronous lifting of steel structure grid

technical field

The utility model relates to a jacking device, in particular to a device for the overall synchronous jacking of a steel structure grid.

Background technique

With the continuous development of construction technology, the grid structure has been rapidly developed and widely used in the past 30 to 40 years due to its high rigidity, good integrity, good seismic performance, light weight, steel saving and good adaptability. At present, the traditional grid installation methods include high-altitude assembly method, lifting method, integral hoisting method and jacking method. The high-altitude assembly method requires a large amount of frame material to set up the operating platform, and the material rental and labor costs are high. Although the overall hoisting-in-place method has the characteristics of simple and convenient construction, short construction period, and easy guarantee of project quality, the cost of the crane platform is too high, and the road that the crane travels must be dealt with. The construction cost is very high, and the key is that it is limited by the site. , it is difficult to meet the construction requirements; although the hydraulic integral lifting is not limited by the site, it has high requirements for the original structure as a reliable lifting fulcrum, and the structural steel column cannot meet the bearing capacity requirements. The jacking method combines the above advantages. The grid is assembled on the ground, which is safe and time-saving, and the assembly quality is easy to ensure. The installation of the jacking frame is not restricted by the site and the surrounding environment, so it is widely used in the construction of the grid structure with balanced weight. middle.

However, the roof of a certain project is a combined eccentric super-heavy slope angle steel structure, and the main structure is an inclined quadrangular pyramid grid. If the traditional method is used to lift, only the lower string ball of the top grid can be supported. There is a lower chord member directly under the upper chord ball of the net frame, which blocks the jacking of the jacking frame and cannot realize the jacking. The lower string ball of the roof support grid is bound to increase the ground assembly height of the steel structure, increase the amount of work at high places, and increase the difficulty of the installation of the jacking frame. Therefore, how to reduce the ground assembly height of the grid steel structure, reduce the amount of work at high places, and reduce the installation difficulty of the jacking frame has become an urgent problem in the industry.

SUMMARY OF THE INVENTION

In order to solve the technical problems existing in the known technology, the utility model provides a device for the overall synchronous lifting of a steel structure grid frame. By adopting the device, the ground assembly height of the grid frame steel structure can be reduced, the workload at high places can be reduced, and the The installation difficulty of the jacking frame.

The technical solution adopted by the utility model to solve the technical problems existing in the known technology is as follows: a device for the overall synchronous lifting of a steel structure grid frame, comprising a cross joist and its jacking frame, and the cross joist includes Four cantilever beams arranged horizontally in the shape of a "cross", on the cantilever ends of the cantilever beams, a stringed ball bracket on a grid frame is fixed, and a hemispherical hinge support is fixed below the middle of the cross joist. The jacking frame includes a jack and a frame body, and the frame body includes a jacking bracket, an initial section, a multi-level standard section and a base that are coaxially arranged in sequence from top to bottom, and the jack is fixed on the base. . The frame body is jacked up section by section through a universal jacking plate, and a jacking ball bracket that is matched with the hemispherical hinge support is arranged on the top of the jacking bracket.

The lifting ball holder and the upper string ball holder have the same structure, and are provided with a bottom plate, an inner pipe string is fixedly connected to the center of the bottom plate, and an outer pipe string is sheathed on the outside of the inner pipe string, and the outer pipe string is sleeved. The pipe string is placed freely on the bottom plate, the inner pipe string is shorter than the outer pipe string, and the two jointly support the same spherical part, and the inner pipe string and the space between the inner pipe string and the outer pipe string The annular space is filled with a surface sand body for supporting the spherical part, a sand outlet hole is arranged at the bottom of the outer pipe string, and a gate is arranged on the sand outlet hole.

The base is provided with a rice-shaped support structure, and the rice-shaped support structure is welded inside the rectangular frame.

Both the m-shaped support structure and the rectangular frame are welded by I-beams.

The advantages and positive effects of the utility model are: the upper string ball on the grid is hinged with the ball support, the jacking frame is hinged with the cross joist, the jack is jacked up by a universal jacking plate, and three hinged supports are formed, which can prevent the jacking process. The damage of the jack cylinder caused by the deflection of the jacking frame can effectively eliminate the influence of the weight eccentricity of the grid frame during the lifting process, so that the lifting reaction force of each jacking point is relatively uniform, and the overall lifting of the grid frame is stable. The ball support adopts the inner and outer pipe strings to jointly support the same spherical part, forming a double support for the spherical part, and the outer pipe string is movable, which is convenient for replacement according to the size of the spherical part, the surface sand body can flow, and the surface sand body can flow. Opening the gate under pressure can realize self-adaptive adjustment, so it can better support the steel structure grid, and greatly improve the stability, reliability and safety of the support. In addition, the top of the outer pipe column wraps the bottom of the spherical component, and will not interfere with the upper component, which can save on-site cutting operation and facilitate construction.

Description of drawings

Fig. 1 is the structural representation of the utility model;

Fig. 2 is the exploded view of Fig. 1;

Fig. 3 is the structural schematic diagram of the lifting ball holder and the upper string ball holder of the present invention;

FIG. 4 is a cross-sectional view of FIG. 3 .

In the figure: 1. Cross joist; 1-1. Hemispherical hinge support; 2. Ball support on the grid; 3. Jacking support; 3-1. Lifting ball support; 4. Initial section; 5. Standard section ;6, jack; 6-1, universal top pallet; 7, base; 8, bottom plate; 9, outer pipe string; 10, inner pipe string; 11, surface sand body; 12, gate.

Detailed ways

In order to further understand the content of the invention, features and effects of the present utility model, the following embodiments are exemplified and described in detail as follows in conjunction with the accompanying drawings:

Please refer to FIGS. 1 to 4 , a device for synchronizing the overall lifting of a steel structure grid includes a cross joist 1 and its jacking frame. The cross joist 1 includes four horizontally arranged in a "cross" shape The cantilever beam is fixed on the cantilever end of the cantilever beam, with a stringed ball bracket 2 on the grid frame, and a hemispherical hinge support 1-1 fixedly connected to it under the middle of the cross joist beam 1. The jacking frame includes a jack 6 and a frame body. The frame body includes a jacking bracket 3, an initial section 4, a multi-level standard section 5 and a base 7 that are coaxially arranged from top to bottom. The jack 6 is fixedly mounted on the On the base 7, the frame body is jacked up section by section through the universal jacking plate 6-1, and the top of the jacking 3 is provided with a jacking ball 3- 1.

The cross joist can extend into the inside of the lifting object, thereby avoiding the obstruction of the lower structure, realizing the upper support, reducing the height of the working surface, and avoiding high-altitude operation. Using the height of the initial section of the jacking frame to adapt to the jacking height, the jack has high adjustment accuracy, which can effectively reduce the jacking error during the jacking process. Using the jack to drive the universal top plate to lift the frame body can prevent the jack cylinder from being damaged due to the deflection of the jacking frame during the lifting process, so that the lifting reaction force is relatively uniform.

In this embodiment, the lifting ball holder 3-1 and the upper string ball holder 2 have the same structure, and are provided with a bottom plate 8, and an inner pipe column 10 is fixed in the center of the bottom plate 8. The outer surface of the pipe string 10 is sheathed with an outer pipe string 9, the outer pipe string 9 is freely placed on the bottom plate 8, the inner pipe string 10 is shorter than the outer pipe string 9, and the two jointly support the same spherical shape. The inner pipe string 10 and the annular space between the inner and outer pipe strings are filled with a surface sand body 11 for supporting the spherical part, and a sand outlet hole is provided at the bottom of the outer pipe string 9, A gate 12 is provided on the sand outlet. The above structure uses the inner and outer pipe strings to jointly support the same spherical part, forming a double support for the spherical part, and the outer pipe string is movable, the surface sand body can flow, and the gate can be opened under the pressure of the support to realize self-adaptation. Therefore, the steel structure grid can be better lifted and supported, and the stability, reliability and safety of the lifting and support can be greatly improved.

In this embodiment, the base 7 is provided with a rice-shaped support structure, and the rice-shaped support structure is welded inside the rectangular frame. The base 7 with the rice-shaped support can disperse the reaction force of the jack and ensure that the jacking frame is more stable. When inserting the standard section, the base 7 with the m-shaped support can provide the jack 6 with a solid bottom support whose flatness meets the lifting requirements. In this embodiment, the m-shaped support structure and the rectangular frame are both welded by I-beams.

Although the preferred embodiments of the present utility model have been described above in conjunction with the accompanying drawings, the present utility model is not limited to the above-mentioned specific embodiments, which are only illustrative and not restrictive. Under the enlightenment of the present utility model, those of ordinary skill can also make many forms without departing from the scope of the present utility model and the protection scope of the claims, which all belong to the protection scope of the present utility model.

Claims (4)

1. The utility model provides a device for whole synchronous jacking of steel construction rack, a serial communication port, including cross joist and jacking frame thereof, the cross joist includes four cantilever beams that are "ten" font level and arrange the rigid coupling has net rack upper chord ball to hold on the cantilever of cantilever beam the middle part below of cross joist is equipped with the hemisphere hinged-support rather than the rigid coupling, jacking frame includes jack and support body, the support body includes from last to lower jacking, initial festival, multistage standard festival and the base of coaxial setting in proper order, the jack is adorned admittedly on the base, through universal top layer board festival jacking the support body the jacking top be equipped with the anastomotic jacking ball of hemisphere hinged-support holds in the palm.

2. The device for synchronously jacking the steel structure net rack integrally according to claim 1, wherein the jacking ball support and the upper chord ball support are the same in structure and are provided with a bottom plate, an inner pipe column is fixedly connected to the center of the bottom plate, an outer pipe column is sleeved outside the inner pipe column, the outer pipe column is freely placed on the bottom plate, the inner pipe column is shorter than the outer pipe column and supports the same spherical component together, surface sand bodies for supporting the spherical component are filled in the inner pipe column and the annular space between the inner pipe column and the outer pipe column, sand outlet holes are formed in the bottom of the outer pipe column, and gates are arranged on the sand outlet holes.

3. The device for jacking up the steel structure net rack integrally and synchronously as claimed in claim 1, wherein the base is provided with a support structure shaped like a Chinese character 'mi', and the support structure shaped like a Chinese character 'mi' is welded inside the rectangular frame.

4. The device for jacking up the steel structure net rack integrally and synchronously as claimed in claim 3, wherein the support structure shaped like a Chinese character 'mi' and the rectangular frame are both formed by welding I-shaped steel.

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