Adjustable leveling conversion joint for tower crane

Abstract

The application relates to the technical field of tower cranes, and discloses an adjustable leveling conversion joint of a tower crane, which comprises a supporting frame, an upper supporting leg, a lower supporting leg and a pad plate. The application has a reasonable and compact structure, and can adjust the levelness of the supporting frame and the upper supporting leg by changing the number and / or thickness of the pad plates when the tower crane is pre-buried and poured to form a flat phenomenon, or when the inclination of the tower crane exceeds the standard value due to uneven settlement after the tower crane is completely installed, so that the inclination of the tower crane after complete installation meets the standard, and the safety hidden danger of the tower crane during use is reduced. By changing the number and / or thickness of the pad plates to adjust the levelness of the supporting frame and the upper supporting leg, the adjustment of the upper supporting leg can meet the error phenomenon of the pre-buried supporting leg. In the case that the existing foundation level is uneven, leveling installation can be directly carried out, and the application has the advantages of simple and convenient use, high efficiency and low cost.

Description

Technical Field

[0001] This application relates to the field of tower crane technology, specifically an adjustable leveling transition section for tower cranes. Background Technology

[0002] In construction sites, tower cranes are the most common method for vertically transporting goods. However, various problems still arise during the use and installation of tower cranes. Foundation construction is a crucial step, yet several safety hazards can still exist during this process. These hazards include: First, the concrete pouring process can impact the tower crane's outriggers, causing a change in levelness. Second, uneven pre-embedded foundation outriggers, due to the irregularity of underground channels and uneven settlement of the foundation over time, can lead to the tower crane becoming unlevel.

[0003] To address the aforementioned issues, although the pre-embedded legs of the fishplate type and mortise and tenon structure are strictly controlled during the construction of tower crane foundations, unevenness of the pre-embedded legs can still occur. This can lead to the dismantling and replacement of the tower crane, or the need for custom-made special sections. In severe cases, the foundation may be scrapped, resulting in personnel injuries.

[0004] If the pre-embedded outriggers of a tower crane are not leveled, there will be a major safety hazard, the tower crane cannot be installed, and the foundation will be scrapped, resulting in direct economic losses. If uneven settlement occurs during use, the tower crane must be dismantled and a new tower crane must be installed, resulting in economic losses and safety hazards during the dismantling and reassembly process. Summary of the Invention

[0005] This application provides an adjustable leveling transition joint for tower cranes, which overcomes the shortcomings of the existing technology and can effectively solve the problems of safety hazards and adjustment difficulties caused by uneven or uneven settlement of the pre-embedded legs of existing tower cranes.

[0006] The technical solution of this application is achieved through the following measures: an adjustable leveling transition section for a tower crane, including a support frame, upper legs, lower legs, and pads. The support frame is cross-shaped, and upper legs are fixedly installed on the upper sides of the four ends of the support frame. Each upper leg has several radially penetrating first connecting holes spaced vertically on its upper outer side. A tubular lower leg is provided below the support frame corresponding to each upper leg position. Each lower leg has several radially penetrating second connecting holes spaced vertically on its lower outer side. At least one pad is fixedly installed between the upper side of each lower leg and the lower side of the support frame from top to bottom.

[0007] The following are further optimizations and / or improvements to the technical solution applied for:

[0008] The cross-section of the aforementioned support frame can be I-shaped. An upper base plate is fixed between the lower end of each upper leg and the upper side of the support frame. Several first stiffeners are evenly distributed along the circumference on the lower outer side of each upper leg. The lower side of each first stiffener is fixedly connected to the upper side of the corresponding position of the upper base plate.

[0009] The upper part of the aforementioned upper support leg may be provided with a stepped surface, with the first stiffening plate located below the stepped surface and the first connecting hole located above the stepped surface.

[0010] Each of the aforementioned lower support legs can be fixed with a lower base plate between its upper end and the lower side of the bottom pad. Each lower support leg has several pairs of second stiffeners evenly distributed around its outer circumference. Each pair of second stiffeners is symmetrically arranged about the second connecting hole. The upper side of each second stiffener is fixedly connected to the lower side of the lower base plate at the corresponding position.

[0011] The lower support leg has two pairs of second stiffening plates evenly distributed around its circumference. Between the pairs of second stiffening plates are two symmetrical limiting plates about the second connecting holes. Each limiting plate is fixedly connected to the outer side of the lower support leg. Each second connecting hole is equipped with a connecting pin. Each connecting pin has a radially penetrating insertion hole located between the two limiting plates. The side of the limiting plate corresponding to each insertion hole is equipped with a limiting through hole. A pin with its end passing through the limiting through hole is installed in the insertion hole. Both ends of the pin are equipped with radially penetrating fixing through holes. Each fixing through hole is equipped with a pin.

[0012] Eight first stiffening plates are evenly distributed along the circumference on the lower outer side of each of the above-mentioned upper support legs. The four first stiffening plates on the outer side of each upper support leg correspond to the second stiffening plates on the outer side of the corresponding lower support leg. The upper bottom plate between each pair of adjacent first stiffening plates is provided with mounting holes extending to the lower bottom plate. A connecting bolt with its lower end located below the lower bottom plate is installed in each mounting hole. At least one connecting nut is screwed onto the lower outer side of each connecting bolt.

[0013] The central axes of the first connecting holes on the two upper legs on the left and the central axes of the second connecting holes on the two lower legs on the left can be in the front-back direction, while the central axes of the first connecting holes on the two upper legs on the right and the central axes of the second connecting holes on the two lower legs on the right are in the left-right direction.

[0014] The upper side of the aforementioned support frame can be fixed with a lifting lug corresponding to the upper support leg.

[0015] This application features a reasonable and compact structure. When the pre-embedded legs of the tower crane are unevenly leveled after pouring, or when uneven settlement occurs after installation causing the tower crane's tilt to exceed the standard value, the levelness of the support frame and upper legs can be adjusted by changing the number and / or thickness of the shims. This ensures the tilt of the tower crane meets the standard after installation, reducing safety hazards during use. Adjusting the level of the support frame and upper legs by changing the number and / or thickness of the shims allows the upper legs to accommodate errors in the pre-embedded legs. In cases where the existing foundation is uneven, leveling and installation can be performed directly. This design offers advantages such as simplicity, convenience, high efficiency, and low cost. Attached Figure Description

[0016] Appendix Figure 1 This is a schematic diagram of the main structure of the preferred embodiment of this application.

[0017] Appendix Figure 2 This is a top view of the preferred embodiment of this application.

[0018] Appendix Figure 3 For the appendix Figure 1 A magnified structural diagram of point A in the middle.

[0019] Appendix Figure 4 This is a top sectional view of the right front lower support leg in the preferred embodiment of this application.

[0020] Appendix Figure 5 This is a front view of the left front lower support leg in the preferred embodiment of this application.

[0021] Appendix Figure 6 This is a top sectional view of the left front lower support leg in the preferred embodiment of this application.

[0022] Appendix Figure 7 This is a schematic diagram of the pin structure in the preferred embodiment of this application.

[0023] Appendix Figure 8 This is a top view of the front right pad in the preferred embodiment of this application.

[0024] The codes in the attached diagram are as follows: 1 is the support frame, 2 is the upper support leg, 3 is the lower support leg, 4 is the pad, 5 is the first connecting hole, 6 is the second connecting hole, 7 is the upper base plate, 8 is the first stiffening plate, 9 is the stepped surface, 10 is the lower base plate, 11 is the second stiffening plate, 12 is the limiting plate, 13 is the connecting pin, 14 is the insertion hole, 15 is the limiting through hole, 16 is the pin shaft, 17 is the fixing through hole, 18 is the pin, 19 is the connecting bolt, 20 is the connecting nut, and 21 is the lifting lug. Detailed Implementation

[0025] This application is not limited to the following embodiments, and the specific implementation method can be determined according to the technical solution of this application and the actual situation.

[0026] In this application, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0027] The present application will be further described below with reference to the embodiments and accompanying drawings:

[0028] As attached Figure 1 , 2 As shown in Figures 3, 4, 6, and 8, the adjustable leveling transition section of the tower crane includes a support frame 1, upper legs 2, lower legs 3, and pads 4. The support frame 1 is cross-shaped, and upper legs 2 are fixedly installed on the upper sides of the four ends of the support frame 1. Each upper leg 2 has several radially penetrating first connecting holes 5 spaced vertically on its upper outer side. A tubular lower leg 3 is provided below the support frame 1 corresponding to each upper leg 2 position. Each lower leg 3 has several radially penetrating second connecting holes 6 spaced vertically on its lower outer side. At least one pad 4 is fixedly installed between the upper side of each lower leg 3 and the lower side of the support frame 1 from top to bottom.

[0029] There are 3 pads 4. The thickness of the pads 4 gradually increases from bottom to top. The bottom pad 4 can be 2mm thick, the middle pad 4 can be 4mm thick, and the top pad 4 can be 6mm thick.

[0030] If the pre-embedded legs of a tower crane are uneven after pouring concrete, or if uneven settlement occurs after the tower crane is installed, causing the tilt of the tower crane to exceed the standard value, the levelness of the support frame 1 and the upper leg 2 can be adjusted by changing the number and / or thickness of the pads 4. This ensures that the tilt of the tower crane meets the standard after installation, reducing safety hazards during use. Adjusting the levelness of the support frame 1 and the upper leg 2 by changing the number and / or thickness of the pads 4 allows the adjustment of the upper leg 2 to meet the error phenomenon of the pre-embedded legs. In cases where the existing foundation is uneven, leveling and installation can be carried out directly, which has the advantages of being simple, convenient, efficient, and low-cost.

[0031] The adjustable leveling transition section of the tower crane can be further optimized and / or improved according to actual needs:

[0032] As attached Figure 1 , 2As shown in Figure 3, the cross-section of the support frame 1 is I-shaped. An upper base plate 7 is fixed between the lower end of each upper leg 2 and the upper side of the support frame 1. Several first stiffening plates 8 are evenly distributed along the circumference on the lower outer side of each upper leg 2. The lower side of each first stiffening plate 8 is fixedly connected to the corresponding position on the upper side of the upper base plate 7. The upper base plate 7 increases the contact area between the upper leg 2 and the support frame 1, preventing stress concentration and deformation or breakage on the upper side of the support frame 1 after the upper leg 2 is connected to the frame. By setting the first stiffening plates 8, the connection strength between the upper leg 2 and the support frame 1 can be improved, enhancing stability during use.

[0033] As attached Figure 1 As shown, the upper support leg 2 has a stepped surface 9 on its upper part, the first stiffening plate 8 is located below the stepped surface 9, and the first connecting hole 5 is located above the stepped surface 9. The stepped surface 9 can support the frame installed on the upper support leg 2, and can also reduce the load on the connector in the first connecting hole 5, thereby improving stability.

[0034] As attached Figures 1 to 6 As shown, a lower base plate 10 is fixed between the upper end of each lower support leg 3 and the lower side of the lowest pad 4. Several pairs of second stiffening plates 11 are evenly distributed along the circumference of the outer side of each lower support leg 3. Each pair of second stiffening plates 11 is symmetrically arranged about the second connecting hole 6, and the upper side of each second stiffening plate 11 is fixedly connected to the corresponding position on the lower side of the lower base plate 10. The lower base plate 10 increases the contact area between the lower support leg 3 and the pad 4, thereby improving the stability between the lower support leg 3 and the support frame 1. The symmetrical arrangement of each pair of second stiffening plates 11 about the second connecting hole 6 avoids interference with the connectors installed in the second connecting hole 6, preventing difficulties in disassembling and assembling the connectors, and facilitating quick assembly and disassembly between the lower support leg 3 and the pre-embedded support leg.

[0035] As attached Figure 1 , 4As shown in Figure 7, two pairs of second stiffening plates 11 are evenly distributed along the circumference of the outer side of the lower support leg 3. Two limiting plates 12 symmetrical about the second connecting hole 6 are provided between the pairs of second stiffening plates 11. Each limiting plate 12 is fixedly connected to the outer side of the lower support leg 3. A connecting pin 13 is installed in each second connecting hole 6. Each connecting pin 13 has a radially penetrating insertion hole 14 located between the two limiting plates 12. The side of the limiting plate 12 corresponding to each insertion hole 14 has a limiting through hole 15. A pin 16 with its end passing through the limiting through hole 15 is installed in the insertion hole 14. Both ends of the pin 16 have radially penetrating fixing through holes 17. A pin 18 is installed in each fixing through hole 17. The pin 18 is a known R-type spring pin. The second rib plate 11 at both ends of the pin shaft 16 is provided with disassembly and assembly holes for disassembling and assembling the pin shaft 16. The setting of the limiting plate 12 and the pin 18 can fix the pin shaft 16, thereby fixing the connecting pin 13 and preventing the connecting pin 13 from falling off during use.

[0036] As attached Figures 1 to 6 As shown, eight first stiffening plates 8 are evenly distributed circumferentially on the lower outer side of each upper support leg 2. Four of the first stiffening plates 8 on the outer side of each upper support leg 2 correspond to the second stiffening plates 11 on the outer side of the corresponding lower support leg 3. Each adjacent pair of first stiffening plates 8 has a mounting hole on the upper side of the upper base plate 7, extending to the lower side of the lower base plate 10. A connecting bolt 19 with its lower end below the lower base plate 10 is installed in each mounting hole. At least one connecting nut 20 is screwed onto the lower outer side of each connecting bolt 19. There are eight connecting bolts 19 in total. Each connecting bolt 19 is pre-tightened during use, with a pre-tightening force of 437 KN. Two connecting nuts 20 are screwed onto the lower end of each connecting bolt 19 to prevent loosening.

[0037] As attached Figure 1 , 4 As shown in Figures 6 and 7, the central axes of the first connecting holes 5 on the two upper support legs 2 on the left and the central axes of the second connecting holes 6 on the two lower support legs 3 on the left are both oriented front-to-back, while the central axes of the first connecting holes 5 on the two upper support legs 2 on the right and the central axes of the second connecting holes 6 on the two lower support legs 3 on the right are both oriented left-to-right. The central axes of the first connecting holes 5 on the left and the first connecting holes 5 on the right are staggered, and the central axes of the second connecting holes 6 on the left and the second connecting holes 6 on the right are also staggered. This arrangement prevents the connecting pins 13 connected to the support legs from falling off simultaneously during use, thus improving the stability of the connection.

[0038] As attached Figure 1 , 2As shown, a lifting lug 21 corresponding to the upper support leg 2 is fixed on the upper side of the support frame 1. The lifting lug 21 is provided to facilitate the hoisting and transfer of the support frame 1.

[0039] The above technical features constitute the preferred embodiment of this application, which has strong adaptability and the best implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the needs of different situations.

Claims

1. An adjustable levelling swivel joint for a tower crane, characterised in that The support frame is cross-shaped, and upper supporting legs are fixedly installed on the upper side of four end portions of the support frame. A plurality of first connecting holes are arranged on the outer side of the upper portion of each upper supporting leg in an up-down interval. A tubular lower supporting leg is arranged below the support frame corresponding to the position of each upper supporting leg. A plurality of second connecting holes are arranged on the outer side of the lower portion of each lower supporting leg in an up-down interval. At least one pad is fixedly installed between the upper side of each lower supporting leg and the lower side of the support frame in sequence from top to bottom. A lower bottom plate is fixed between the upper end of each lower supporting leg and the lower side of the lowermost pad. A plurality of pairs of second rib plates are uniformly distributed on the outer side of each lower supporting leg in a circumferential direction. Each pair of second rib plates is symmetrically arranged about the second connecting hole. The upper side of each second rib plate is fixedly connected to the corresponding position of the lower side of the lower bottom plate. Two pairs of second rib plates are uniformly distributed on the outer side of the lower supporting leg in a circumferential direction. Two limiting plates symmetrically arranged about the second connecting hole are arranged between one pair of second rib plates. Each limiting plate is fixedly connected to the outer side of the lower supporting leg. A connecting pin is arranged in each second connecting hole. A radial insertion hole is arranged on the outer side of each connecting pin and located between the two limiting plates. A limiting through hole is arranged on the side of the limiting plate corresponding to the position of each insertion hole. A pin shaft with an end portion penetrating through the limiting through hole is arranged in the insertion hole. Radial fixing through holes are arranged at both ends of the pin shaft. A pin is arranged in each fixing through hole.

2. A tower crane adjustable levelling swivel joint according to claim 1, characterised in that The cross section of the support frame is H-shaped. An upper bottom plate is fixed between the lower end of each upper supporting leg and the upper side of the support frame. A plurality of first rib plates are uniformly distributed on the outer side of the lower portion of each upper supporting leg in a circumferential interval. The lower side of each first rib plate is fixedly connected to the upper side of the upper bottom plate in a corresponding position.

3. A tower crane adjustable levelling swivel joint according to claim 2, characterised in that The upper portion of the upper supporting leg is provided with a stepped surface. The first rib plate is located below the stepped surface, and the first connecting hole is located above the stepped surface.

4. A tower crane adjustable levelling swivel joint according to claim 1 or 2 or 3, characterised in that Eight first rib plates are uniformly distributed on the outer side of the lower portion of each upper supporting leg in a circumferential interval. The four first rib plates on the outer side of each upper supporting leg correspond to the second rib plates on the outer side of the corresponding lower supporting leg. The upper side of the upper bottom plate between each adjacent two first rib plates is provided with a mounting hole extending to the lower side of the lower bottom plate. A connecting bolt with a lower end located below the lower bottom plate is arranged in each mounting hole. At least one connecting nut is screwed to the lower portion of each connecting bolt.

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