阅读说明：本技术 一种变截面式塔机用的顶升装置 (Jacking device for variable cross-section tower crane ) 是由 周志勇 徐慧 朱海知 李佳峰 易梅芳 于 2021-08-20 设计创作，主要内容包括：本发明公开了一种变截面式塔机用的顶升装置,包括固定在底座上部的塔身、位于塔身顶部的吊臂及配合设置在塔身上的顶升装置；所述顶升装置包括驱动机构、与驱动机构固定连接的套架、配合塔身设置在套架上的导轮机构及固定在套架外围的上平台和下平台；所述塔身包括第一标准节和第二标准节；第一标准节和第二标准节均由H型钢连接构成。(The invention discloses a jacking device for a variable cross-section tower crane, which comprises a tower body fixed on the upper part of a base, a suspension arm positioned at the top of the tower body and a jacking device arranged on the tower body in a matching way; the jacking device comprises a driving mechanism, a sleeve frame fixedly connected with the driving mechanism, a guide wheel mechanism matched with the tower body and arranged on the sleeve frame, and an upper platform and a lower platform which are fixed on the periphery of the sleeve frame; the tower body comprises a first standard knot and a second standard knot; the first standard knot and the second standard knot are formed by connecting H-shaped steel.)

1. A jacking device for a variable cross-section tower crane is characterized by comprising a base (1), a tower body (2) fixed on the upper part of the base (1), a suspension arm (3) positioned at the top of the tower body (2) and a jacking device arranged on the tower body (2) in a matching way; the jacking device comprises a driving mechanism, a sleeve frame (5) fixedly connected with the driving mechanism, a guide wheel mechanism arranged on the sleeve frame (5) in a matching manner with the tower body (2), and an upper platform (4) and a lower platform (6) which are fixed on the periphery of the sleeve frame (5); the tower body (2) comprises a first standard knot (20) and a second standard knot (21); the first standard knot (20) and the second standard knot (21) are formed by connecting H-shaped steel.

2. The jacking device for the variable cross-section tower crane according to claim 1, wherein: the length and width of the cross section of the second standard knot (21) are larger than those of the cross section of the first standard knot (20).

3. The jacking device for the variable cross-section tower crane according to claim 1, wherein: the upper platform (4) consists of two upper long platforms (40) and one upper short platform (41).

4. The jacking device for the variable cross-section tower crane according to claim 1, wherein: the guide wheel mechanism comprises a large guide wheel set and a small guide wheel set; the big guide wheel set comprises a front wheel component and a rear wheel component.

5. The jacking device for the variable cross-section tower crane according to claim 4, wherein: the front wheel component comprises a front wheel frame (7) fixedly connected with the sleeve frame (5), and a telescopic component arranged at the end part of the front wheel frame, wherein one end of the telescopic component is connected with the auxiliary guide wheel component; the auxiliary guide wheel assembly is in contact with the H-shaped steel of the first standard knot (20) and the second standard knot (21).

6. The jacking device for the variable-section tower crane according to claim 5, wherein: the telescopic piece comprises a first bolt (70) penetrating through the front wheel frame (7) and a first nut (71) rotatably mounted on the front wheel frame (7).

7. The jacking device for the variable-section tower crane according to claim 5, wherein: the auxiliary guide wheel assembly comprises a guide roller joint (72) arranged at the end part of the first bolt (70), a front pin shaft (73) penetrating through the guide roller joint (72), a copper sleeve (74) sleeved on the front pin shaft (73), an auxiliary guide wheel (75) sleeved on the copper sleeve (74) and a split pin (76) matched with the front pin shaft (73); the auxiliary guide wheel (75) can be in contact with the H-shaped steel of the first standard knot (20) and the second standard knot (21).

8. The jacking device for the variable-section tower crane according to claim 5, wherein: the rear wheel component comprises a rear wheel frame (8) which can rotate on the front wheel frame (7), a rear guide wheel shaft (80) which penetrates through the rear wheel frame (8), a bearing (81) which is fixed on the rear guide wheel shaft (80), a rear guide wheel (82) which is sleeved on the bearing (81), an end cover (83) which is matched with the rear guide wheel (82) and is arranged at the end part of the rear guide wheel shaft (80) and a driving piece; the rear guide wheel (82) can be in contact with the H-shaped steel of the first standard knot (20) and the second standard knot (21).

9. The jacking device for the variable-section tower crane according to claim 8, wherein: the driving piece comprises a first fixing plate (84) and a second fixing plate (85) which are fixed on the sleeve frame (5), a second nut (86) which is fixed on the first fixing plate (84), and a second bolt (87) which penetrates through the first fixing plate (84) and is matched with the second nut (86), and the second bolt (87) can be in contact with the rear wheel frame (8).

10. The jacking device for the variable-section tower crane according to claim 7, wherein: the width of the auxiliary guide wheel (75) is larger than the width of the H-shaped steel of the first standard knot (20) and the second standard knot (21).

Technical Field

The invention belongs to the technical field of tower cranes, and particularly relates to a jacking device for a variable-section tower crane.

Background

With the high-speed development of economy, high-rise buildings are more and more, when the tower crane is used for construction of the high-rise buildings, the tower body of the tower crane is often required to be fixed to the buildings through the attaching wall, and the phenomenon that the tower body shakes or collapses due to torque generated by heavy objects when the tower body is too high in the process of lifting the objects is avoided.

Compared with the traditional tower crane, the tower body with the variable cross section formed by combining the standard sections can improve the mechanical properties of the tower crane such as the independent height, the bending moment and the like, but when the existing jacking wheels pass through different cross sections, gaps are generated due to the change of the cross sections, so that the derailment, the shaking, the impact and the like of a jacking mechanism are caused, and the life safety of workers is damaged.

Disclosure of Invention

The invention provides a jacking device for a variable cross-section tower crane, aiming at overcoming the defects of the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme: a jacking device for a variable cross-section tower crane comprises a base, a tower body fixed on the upper part of the base, a suspension arm positioned at the top of the tower body and a jacking device arranged on the tower body in a matching way; the jacking device comprises a driving mechanism, a sleeve frame fixedly connected with the driving mechanism, a guide wheel mechanism matched with the tower body and arranged on the sleeve frame, and an upper platform and a lower platform which are fixed on the periphery of the sleeve frame; the tower body comprises a first standard knot and a second standard knot; the first standard knot and the second standard knot are formed by connecting H-shaped steel; through the listed matching of the first standard knot and the second standard knot, the current situation that the same traditional tower crane only can use the standard knot with the same section is changed, and different section forms of the standard knot are increased; the first standard section and the second standard section adopt an assembled structure, so that the mechanical properties such as the independent height, the bending moment and the like of the tower crane can be improved, the product is convenient to update, the design, manufacture, use and management are simplified, and the economic benefit of the tower crane is improved; the self-weight of the tower crane is reduced, the reserve volume of the standard knot of the unit tower crane can be obviously reduced, and the conditions are created for reducing the cost and simplifying the management.

Further, the length and the width of the cross section of the second standard knot are larger than those of the cross section of the first standard knot.

Furthermore, the upper platform consists of two upper long platforms and one upper short platform.

Further, the guide wheel mechanism comprises a large guide wheel set and a small guide wheel set; the large guide wheel set comprises a front wheel component and a rear wheel component; the length and the width of the cross section of the first standard joint are different from that of the second standard joint, and the large guide wheel set and the small guide wheel set in the jacking mechanism can be in stable transition according to the change position of the cross section, so that the sleeve frame can stably move on the tower body, and the tower body can stably work.

Furthermore, the front wheel component comprises a front wheel frame fixedly connected with the sleeve frame and an extensible member arranged at the end part of the front wheel frame, and one end of the extensible member is connected with the auxiliary guide wheel component; the auxiliary guide wheel assembly is in contact with the H-shaped steel of the first standard knot and the second standard knot.

Further, the telescopic piece comprises a first bolt penetrating through the front wheel frame and a first nut rotatably mounted on the front wheel frame.

Furthermore, the auxiliary guide wheel assembly comprises a guide roller joint arranged at the end part of the first bolt, a front pin shaft penetrating through the guide rail joint, a copper sleeve sleeved on the front pin shaft, an auxiliary guide wheel sleeved on the copper sleeve and a cotter pin matched with the front pin shaft; the auxiliary guide wheel can be in contact with the H-shaped steel of the first standard knot and the second standard knot.

Furthermore, the rear wheel component comprises a rear wheel frame capable of rotating on the front wheel frame, a rear guide wheel shaft penetrating through the rear wheel frame, a bearing fixed on the rear guide wheel shaft, a rear guide wheel sleeved on the bearing, an end cover matched with the rear guide wheel and arranged at the end part of the rear guide wheel shaft, and a driving piece; the rear guide wheel can be in contact with the H-shaped steel of the first standard knot and the second standard knot.

Furthermore, the driving part comprises a first fixing plate and a second fixing plate which are fixed on the sleeve frame, a second nut fixed on the first fixing plate and a second bolt which penetrates through the first fixing plate and is matched with the second nut, and the second bolt can be in contact with the rear wheel frame; through the cooperation of auxiliary guide wheel and back guide wheel, can make the cover frame contact with the body of the tower all the time, be in the support state all the time, make the cover frame slide steadily in the in-process that rises.

Further, the width of the auxiliary guide wheel is larger than the width of the H-shaped steel of the first standard knot and the second standard knot; when the auxiliary guide wheel passes from the first standard knot to the second standard knot, the auxiliary guide wheel can be always in contact with the side end parts of the two parallel steel plates of the H-shaped steel with the first standard knot or the second standard knot.

In summary, through the listed matching of the first standard knot and the second standard knot, the current situation that the same traditional tower crane can only use the standard knot with the same section is changed, and different section forms of the standard knot are increased; the mechanical properties such as the independent height, the bending moment and the like of the tower crane can be improved.

The cross section length width of first standard festival and second standard festival is different, and big guide pulley group and little guide pulley group in the climbing mechanism can be according to the steady transition of cross section change department, guarantees that the cover frame can be steady move on the body of the tower, guarantees that the body of the tower is steady to be worked, has guaranteed the staff's of work efficiency and safety on upper mounting plate and lower mounting plate.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the jacking device.

Fig. 3 is an enlarged view of fig. 2 at a.

Fig. 4 is a schematic structural view of a large guide pulley set.

Fig. 5 is a schematic structural view of the front wheel assembly.

Fig. 6 is a schematic structural view of the rear wheel assembly.

Detailed Description

As shown in fig. 1-6, a jacking device for a variable cross-section tower crane comprises a base 1, a tower body 2, a boom 3 and a jacking device; the tower body 2 is fixed on the upper part of the base 1; the suspension arm 3 is positioned at the top of the tower body 2; the jacking device comprises a driving mechanism, a sleeve frame 5, a guide wheel mechanism, an upper platform 4 and a lower platform 6; the sleeve frame 5 is fixedly connected with the driving mechanism and consists of an upper group of square sleeves and a lower group of square sleeves which are sleeved on the periphery of the tower body 2 and a plurality of vertical pipes, and the vertical pipes connect the two groups of square sleeves together; the upper platform 4 and the lower platform 6 are arranged in parallel up and down and are fixed with the periphery of the sleeve frame 5, and the upper platform 4 consists of two upper long platforms 40 and one upper short platform 41; the guide wheel mechanism is divided into two layers, is fixedly arranged on the sleeve frame 5 and is contacted with the tower body 2.

Specifically, the tower body 2 comprises a first standard joint 20 and a second standard joint 21, and the length and width of the cross section of the second standard joint 21 are greater than those of the cross section of the first standard joint 20; the first standard knot 20 and the second standard knot 21 are formed by connecting H-shaped steel; the tower body listed by the combination of the first standard knot 20 and the second standard knot 21 has a higher independent height than the conventional tower body.

Specifically, guide wheel mechanism includes big guide wheel group and little guide wheel group, and little guide wheel group and big guide wheel group are in four tip of body of the tower, and little guide wheel group is the same with big guide wheel group's structure, and the working face is mutually perpendicular, and big guide wheel group cooperatees with the side tip of two parallel steel sheets of H shaped steel, and little guide wheel group cooperatees with the parallel steel sheet in the outside of H shaped steel, and the width is less than big guide wheel group, consequently only describes the structure of big guide wheel group.

Specifically, the large guide wheel set comprises a front wheel component and a rear wheel component; the front wheel component comprises a front wheel frame 7, a first bolt 70, a first nut 71, a guide roller joint 72, a front pin shaft 73, a copper sleeve 74, an auxiliary guide wheel 75 and a cotter pin 76; the front wheel frame 7 is fixedly connected with the square sleeve at the upper end of the sleeve frame 5; the first bolt 70 penetrates the upper end of the front wheel frame 7; the first nut 71 is rotatably mounted on the front wheel frame 7 and is in threaded fit with the first bolt 70; the guide roller joint 72 is fixed at the end of the first bolt 70, a front pin shaft 73 penetrates through the guide roller joint, a copper sleeve 74 is sleeved on the front pin shaft 73, an auxiliary guide wheel 75 is sleeved on the copper sleeve 74, the width of the auxiliary guide wheel 75 is larger than that of the H-shaped steel, the auxiliary guide wheel 75 can be in contact with the side end portions of two parallel steel plates of the H-shaped steel of the first standard knot 20 and the second standard knot 21, and the cotter 76 is arranged in a manner of being matched with the front pin shaft 73 and used for limiting the position of the front pin shaft 73.

Specifically, the rear wheel component comprises a rear wheel frame 8, a rear guide wheel shaft 80, a bearing 81, a rear guide wheel 82, an end cover 83 and a driving piece; the rear wheel frame 8 can rotate at the end part of the front wheel frame 7 through an auxiliary pin shaft 88, the rear guide wheel shaft 80 penetrates through the lower end of the rear wheel frame 8, and the bearings 81 are fixed at the two ends of the rear guide wheel shaft 80; the rear guide wheel 82 is sleeved and fixed on the periphery of the bearing 81; the end cover 83 is fixed with two ends of the rear idler shaft 80 through a third bolt 89; the driving member comprises a first fixing plate 84, a second fixing plate 85, a second nut 86 and a second bolt 87, wherein the first fixing plate 84 and the second fixing plate 8 are respectively fixed on a square sleeve at the upper end of the sleeve frame 5; the second nut 86 is fixed to the first fixing plate 84, the second bolt 87 penetrates the first fixing plate 84 and is screwed with the second nut 86, and the end of the second bolt 87 can contact the rear wheel frame 8.

The working principle is as follows: when the jacking process is at the transition of the first standard knot 20 and the second standard knot 21, the operation of the large guide wheel set is as follows:

firstly, lifting a tower: in the jacking process, when the auxiliary guide wheels 75 of the small guide wheel set and the large guide wheel set are moved to the variable cross section, the driving mechanism stops working; the first nut 71 is rotated to make the auxiliary guide wheel 75 tightly attach to the first standard knot 20, the driving mechanism is started to drive the sleeve frame 5 and the connecting piece thereof to slowly move upwards, when the rear guide wheel 82 leaves the second standard knot 21, the second bolt 87 is rotated to make the rear guide wheel 82 tightly attach to the first standard knot 20, after all the rear guide wheels 82 are observed and determined to be in contact with the first standard knot 20, the auxiliary guide wheel 75 is returned to the initial position, and the jacking action is continued.

II, disassembling the tower: in the degradation process, when the small guide wheel set and the large guide wheel set move downwards from the first standard knot 20 to be close to the second standard knot 21, stopping the driving mechanism, adjusting the first nut 71 to enable each auxiliary guide wheel 75 to be tightly attached to the first standard knot 20, adjusting the second bolt 87 to enable the rear guide wheel 82 to be separated from the first standard knot 20 and be in a natural vertical state, enabling the rear guide wheel 82 to be in contact with the second bolt 87 at the moment, enabling the distance value between the rear guide wheel 82 and the first standard knot 20 to be larger than the difference value of the cross sections of the first standard knot 20 and the second standard knot 21, starting the driving mechanism to slowly move, stopping the driving mechanism when the rear guide wheel 82 crosses the variable cross section, adjusting the second bolt 87 to be tightly attached to the second standard knot 21, observing and determining that all the rear guide wheels 82 normally work, returning the auxiliary guide wheels 75 to finish the knot-reducing process, and continuing the normal knot-reducing operation.