Movable cantilever crane suitable for limited space

Abstract

The utility model discloses a movable cantilever crane suitable for limited space, which comprises a permanent steel column, a lower positioning steel plate and an upper positioning steel plate are vertically and fully welded on the permanent steel column, a diagonal bracing steel plate is fully welded between the lower end face of the lower positioning steel plate and the permanent steel column, and a positioning steel pipe column is welded on the lower positioning steel plate far away from the upper end face of the permanent steel column. A steel sleeve is fixedly connected to the upper positioning steel plate in a penetrating mode, a movable steel pipe column is arranged between the steel sleeve and the positioning steel pipe column, an A-shaped steel framework is fully welded to the side wall of the movable steel pipe column, and an electric hoist is slidably connected to the bottom of the A-shaped steel framework. According to the cantilever crane, in the construction process of splicing and hoisting in the heat absorption tower, the tower crane cannot be continuously occupied, and the requirement for splicing of steel members in the heat absorption tower can be met; the method has the advantages of being simple in field operation, flexible in space construction, low in energy consumption, high in steel structure hoisting and assembling efficiency, good in structural stability, high in construction safety coefficient, and capable of saving cost and shortening the construction period.

Description

Technical Field

[0001] The utility model belongs to the technical field of hoisting of steel structure components, and relates to a movable cantilever crane applicable to a limited space. Background Technique

[0002] At present, solar thermal power generation technology has become an important technical support for building a new power system with new energy as the main body. The heat absorption tower is the most important structure in the concentrating and heat-collecting system of a tower-type solar thermal power station, and it is also the tallest structure in the solar thermal power station. The total structural height generally exceeds 150m. In a 100,000-kilowatt solar thermal project at a certain base, the situation of the steel structure installation project in the heat absorption tower at the central island is that there are 4 concrete steel columns supporting the tower, 2 of which reach the 84-meter platform, and the other 2 reach the 178.5-meter platform. The adjacent steel platforms are connected by steel ladders to form an upper and lower safety passage. The overall steel structure composed of 4 steel columns from 0m to 178.5m has 14 bays, and the height of each bay is 14m. There is a 220m-high tower crane installed outside the heat absorption tower, and the effective lifting weight is 42 tons.

[0003] According to the conventional construction technology, each bay of the steel structure is assembled from the ground upwards by the tower crane in sequence for the 14-bay steel structure. Then, it takes 7-8 days to complete the hoisting of each bay of the steel structure. There is a long construction period, and the tower crane is occupied all the time, which restricts other hoisting work. Except for the 4 main columns, the other steel components are less than 1 ton. Using the tower crane for hoisting causes great waste of resources, high consumption of construction electricity, and the efficiency of assembly and welding of workers decreases as the steel structure is lifted. The risk of workers falling from a height increases, and there are many safety risk factors for the ground construction workers. Content of the Utility Model

[0004] The purpose of the utility model is to provide a movable cantilever crane applicable to a limited space, which solves the problems of low hoisting and assembly efficiency and long construction period existing in the prior art.

[0005] The technical solution adopted by the utility model is that a movable cantilever crane applicable to a limited space includes a permanent steel column, a lower positioning steel plate and an upper positioning steel plate are vertically and fully welded on the permanent steel column. A diagonal bracing steel plate is fully welded between the lower end face of the lower positioning steel plate and the permanent steel column. A positioning steel pipe column is welded to the upper end face of the lower positioning steel plate away from the permanent steel column. A steel sleeve is fixedly connected through the upper positioning steel plate. An active steel pipe column is arranged between the steel sleeve and the positioning steel pipe column. An A-shaped steel frame is fully welded on the side wall of the active steel pipe column, and an electric hoist is slidably connected to the bottom of the A-shaped steel frame.

[0006] The characteristics of the utility model also lie in that:

[0007] The lower positioning steel plate and the upper positioning steel plate are arranged in parallel, and the sides of the lower positioning steel plate and the upper positioning steel plate where they are welded to the permanent steel column are arc-shaped, and the inner diameter of the arc matches the outer diameter of the permanent steel column.

[0008] The distance between the lower positioning steel plate and the ground is 18 m, and the distance between the lower positioning steel plate and the upper positioning steel plate is 1.9 m.

[0009] The steel casing and the positioning steel pipe column are on the same axis, and the distance between the positioning steel pipe column and the permanent steel column is 20 cm.

[0010] The included angle between the lower positioning steel plate and the diagonal bracing steel plate is 45°.

[0011] The long side of the lower positioning steel plate is perpendicularly welded with a limiting steel plate, and the short side of the limiting steel plate is perpendicularly welded with the movable steel pipe column.

[0012] The A-shaped steel frame includes a transverse channel steel, a vertical support channel steel is perpendicularly fixed to the transverse channel steel, one end of the transverse channel steel and the top end of the vertical support channel steel are jointly fixed with a diagonal bracing butt-welded angle steel, the transverse channel steel and the diagonal bracing butt-welded angle steel are jointly full-welded with the movable steel pipe column, a walking track cross beam is arranged at the bottom of the transverse channel steel, and the walking track cross beam is slidably connected with an electric hoist.

[0013] The distance between the vertical support channel steel and the movable steel pipe column is 3 m.

[0014] The welding position of the transverse channel steel and the movable steel pipe column is 15 cm above the upper end face of the lower positioning steel plate, and the welding position of the diagonal bracing butt-welded angle steel and the movable steel pipe column is 20 cm below the top end of the movable steel pipe column.

[0015] A cross beam limiting steel plate is welded to one end of the transverse channel steel away from the permanent steel column, two ear plates are welded to the other side of the cross beam limiting steel plate, and a guy rope penetrates through the two ear plates.

[0016] The beneficial effects of the present utility model are as follows:

[0017] The movable cantilever crane applicable to a confined space provided by the present utility model is a movable cantilever crane tooling that can hoist material fittings at a high position in a confined space and cooperate with the assembly and installation of steel structures. It is not only applicable to the outdoor environment, but also can set this structure at a high position for the hoisting and assembly of steel components. By using the movable cantilever crane applicable to a confined space of the present application, it can be realized that during the hoisting and assembly construction process in the heat absorption tower, the tower crane will not be continuously occupied and the cantilever crane that can meet the assembly of steel components in the heat absorption tower can effectively hoist other steel components except the 4 main steel columns. It has the advantages of simple on-site operation, flexible construction in the space, low energy consumption, high hoisting and assembly efficiency of steel structures, good structural stability, high construction safety factor, cost saving and construction period shortening. Description of the Drawings

[0018] Figure 1 It is a structural schematic diagram of the movable cantilever crane applicable to a confined space of the present utility model;

[0019] Figure 2 It is a structural schematic diagram after the decomposition of the A-shaped steel frame of the movable cantilever crane applicable to confined spaces of the present utility model;

[0020] Figure 3 It is a structural schematic diagram of the end of the A-shaped steel frame in the movable cantilever crane applicable to confined spaces of the present utility model.

[0021] In the figure: 1. A-shaped steel frame; 101. Horizontal channel steel; 102. Diagonal tension butt-welded angle steel; 103. Vertical support channel steel; 2. Movable steel pipe column; 3. Electric hoist; 4. Walking track cross beam; 5. Upper positioning steel plate; 6. Steel sleeve; 7. Limit steel plate; 8. Positioning steel pipe column; 9. Diagonal brace steel plate; 10. Cross beam limit steel plate; 11. Ear plate; 12. Guy wire; 13. Permanent steel column; 14. Lower positioning steel plate. Specific embodiments

[0022] The present utility model will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0023] Embodiment 1

[0024] As Figure 1 、 2 shown, the movable cantilever crane applicable to confined spaces includes a permanent steel column 13, on which a lower positioning steel plate 14 and an upper positioning steel plate 5 are vertically and fully welded. The lower positioning steel plate 14 and the upper positioning steel plate 5 are arranged in parallel. The side welding parts of the lower positioning steel plate 14 and the upper positioning steel plate 5 with the permanent steel column 13 are arc-shaped, and the inner diameter of the arc matches the outer diameter of the permanent steel column 13. The distance between the lower positioning steel plate 14 and the ground is 18 m, the distance between the lower positioning steel plate 14 and the upper positioning steel plate 5 is 1.9 m. A diagonal brace steel plate 9 is fully welded between the lower end face of the lower positioning steel plate 14 and the permanent steel column 13, and the included angle between the lower positioning steel plate 14 and the diagonal brace steel plate 9 is 45°. A positioning steel pipe column 8 is welded to the upper end face of the lower positioning steel plate 14 away from the permanent steel column 13, and the distance between the positioning steel pipe column 8 and the permanent steel column 13 is 20 cm. A steel sleeve 6 is fixedly connected through the upper positioning steel plate 5. The steel sleeve 6 and the positioning steel pipe column 8 are on the same axis. A movable steel pipe column 2 is arranged between the steel sleeve 6 and the positioning steel pipe column 8. A limit steel plate 7 is vertically welded to the long side of the lower positioning steel plate 14, and the short side of the limit steel plate 7 is perpendicularly welded to the movable steel pipe column 2. An A-shaped steel frame 1 is fully welded to the side wall of the movable steel pipe column 2. An electric hoist 3 is slidably connected to the bottom of the A-shaped steel frame 1. All welds need to be subjected to 100% ultrasonic testing and pass the inspection.

[0025] Among these parameters, the outer diameter of the movable steel pipe column 2 is 20 cm, the wall thickness is 8 mm, and the length is 2.5 m; the rated lifting weight of the electric hoist is 2 tons, and the effective lifting weight at the end is 1 ton; the specifications of the lower positioning steel plate 14 and the upper positioning steel plate 5 are 1 m × 40 cm × 1.5 cm; the outer diameter of the steel casing 6 is 21 cm, the wall thickness is 0.8 cm, and the height is 30 cm; the specification of the limit steel plate 7 is 1 m × 30 cm × 1.5 cm; the outer diameter of the positioning steel pipe column 8 is 19 cm, the wall thickness is 0.8 cm, and the height is 30 cm; the specification of the diagonal bracing steel plate 9 is 1 m × 40 cm × 1.5 cm.

[0026] Example 2

[0027] As Figure 2 shown, the movable cantilever crane applicable to confined spaces provided in Example 1 is adopted. The A-shaped steel frame 1 includes a transverse channel steel 101, and a vertical support channel steel 103 is perpendicularly fixed to the transverse channel steel 101. One end of the transverse channel steel 101 and the top end of the vertical support channel steel 103 are jointly fixed with a diagonal welded angle steel 102. The transverse channel steel 101 and the diagonal welded angle steel 102 are both fully welded to the movable steel pipe column 2. The transverse channel steel 101 is slidably connected to the electric hoist 3, and the distance between the vertical support channel steel 103 and the movable steel pipe column 2 is 3 m.

[0028] As Figure 3 shown, the welding position of the transverse channel steel 101 and the movable steel pipe column 2 is 15 cm above the upper end face of the lower positioning steel plate 14. The welding position of the diagonal welded angle steel 102 and the movable steel pipe column 2 is 20 cm below the top end of the movable steel pipe column 2. A crossbeam limit steel plate 10 is welded to one end of the transverse channel steel 101 away from the permanent steel column 13. Two ear plates 11 are welded to the other side of the crossbeam limit steel plate 10. A guy wire 12 passes through the two ear plates 11. All welds need to be subjected to 100% ultrasonic testing and pass the inspection.

[0029] Among them, the specification of the transverse channel steel 101 is 20 cm × 7 cm × 1 cm, and the length is 7 m; the specification of the diagonal welded angle steel 102 is 9 cm × 9 cm × 8 mm, and the length is 6.35 m; the specification of the vertical support channel steel 103 is 18 cm × 7 cm × 1 cm, and the length is 1 m; the specification of the walking track crossbeam is 420 cm × 7 cm × 1 cm, and the length is 7 m; the specification of the crossbeam limit steel plate 10 is 20 cm × 20 cm × 1 cm; the steel plate specification of the ear plate 11 is 10 cm × 10 cm × 1 cm, and the center of the steel plate is provided with a 2-cm hole; the specification of the guy wire 12 is 25 m in length and 1.5 cm in rope diameter.

[0030] Example 3

[0031] Adopting the movable cantilever crane structure applicable to confined spaces provided in Embodiment 2, before this tooling is officially put into use, it is necessary to first verify whether the deformation and stability of its frame structure meet the requirements. On the premise that the calculation results meet the requirements, the steel structure trial hoisting and trial assembly work are carried out, and whether there are abnormal conditions in the structure is observed. Only after verification can the movable cantilever crane tooling be put into use. Before installation, this tooling was simulated and calculated through Lizheng Structural Design Tool Software V8.5pb1. After model calculation, it can be known that this cantilever crane is safe and reliable, and its bearing capacity and deformation meet the specifications and safety requirements, and this structure can meet the on-site hoisting construction.

[0032] During the actual on-site construction, from the ground to the top of the 178.5m hoisting, during the construction process of the overall hoisting by the cantilever crane tooling, there was no deformation and instability phenomenon in the structure of the cantilever crane tooling, and there were no cracks in the welds at the joints of each steel member. After the construction, the overall structure of the cantilever crane tooling remained stable.

[0033] The specific installation conditions are as follows:

[0034] First, determine the installation height of the cantilever crane according to the height of the steel structure section hoisted and assembled in the construction area. The height of the steel structure in one bay of this project is 14m. Considering reserving a certain hoisting space, the installation height of this tooling is 18m. According to on-site actual operation, the installation height of 18m can meet the on-site construction requirements;

[0035] Secondly, in order to cover the entire construction operation area, the plane installation size of the steel structure in each bay of this project is 5.3m×5.6m, and the length of the walking track cross beam of the cantilever crane is selected as 7m, which can effectively cover the entire steel structure installation area. Before hoisting, vehicles are required to transport other steel members used for assembly except the 4 main steel columns to the hoisting area;

[0036] In order to achieve high flexibility and free swing, a 2.5m long rotatable movable steel pipe column is set at the root of the A-shaped steel frame of the cantilever crane. Its bottom contacts the positioning steel pipe column with a height of 30cm, and the upper part passes through the 60cm steel sleeve. The movable contact part can be coated with lubricating grease. Two guy wire ear plates are welded at the end of the A-shaped steel frame, with holes in the middle of the plates, and two guy wires are freely passed through;

[0037] By the ground operators pulling the guy ropes, the jib crane can swing flexibly according to the construction requirements to hoist steel components. At the same time, in order to limit the swing range and enable the jib crane to move within the construction operation range, a limit steel plate needs to be set at the bottom of the root of the A-shaped steel frame to ensure that the jib crane can swing within a range of 90°, including but not limited to 90°, and can be 180°. In order to prevent the electric hoist from sliding out of the walking track crossbeam and falling, a limit steel plate is provided at the end of the A-shaped steel frame in this application. Through the interaction between the various components of this application, it can be applied to the steel structure installation project in the heat absorption tower and can realize the function of flexibly swinging and hoisting steel components in the high-altitude construction area.

[0038] In the preferred solution, it is applicable to hoist various components with a weight of less than 1 ton at high altitude in a confined space. In addition, this device only uses a tower crane when hoisting 4 steel columns and the assembled overall steel structure. During the assembly process, only the jib crane tooling is used and the tower crane is not used, greatly reducing the occupancy time of the tower crane during the construction process. At the same time, the movable jib crane applicable to a confined space disclosed in this application is also applicable to hoisting construction in an outdoor environment.

[0039] The movable jib crane applicable to a confined space provided by the utility model is a movable jib crane tooling that can hoist material fittings at high altitude in a confined space and cooperate with the assembly and installation of steel structures. It is not only applicable to an outdoor environment, but also can set this structure at high altitude for the hoisting and assembly of steel components. By using the movable jib crane applicable to a confined space of this application, during the assembly and hoisting construction process in the heat absorption tower, it is possible to realize a jib crane that does not continuously occupy the tower crane and can meet the assembly of steel components in the heat absorption tower. It can effectively hoist other steel components except the 4 main steel columns, and has the advantages of simple on-site operation, flexible construction in space, low energy consumption, high efficiency of hoisting and assembling steel structures, good structural stability, high construction safety factor, cost saving and construction period shortening.

Claims

1. A movable cantilever crane suitable for limited space, characterized by: The invention comprises a permanent steel column (13), a lower positioning steel plate (14) and an upper positioning steel plate (5) are vertically and fully welded on the permanent steel column (13), a diagonal bracing steel plate (9) is fully welded between the lower end surface of the lower positioning steel plate (14) and the permanent steel column (13), a positioning steel pipe column (8) is welded to the upper end surface of the lower positioning steel plate (14) away from the permanent steel column (13), a steel casing (6) is penetrated and fixedly connected to the upper positioning steel plate (5), a movable steel pipe column (2) is arranged between the steel casing (6) and the positioning steel pipe column (8), the side wall of the movable steel pipe column (2) is fully welded with an A-shaped steel frame (1), and the bottom of the A-shaped steel frame (1) is slidably connected to an electric hoist (3).

2. The movable cantilever crane suitable for limited space according to claim 1, characterized in that: The lower positioning steel plate (14) is arranged in parallel with the upper positioning steel plate (5), and the welding points between the sides of the lower positioning steel plate (14) and the upper positioning steel plate (5) and the permanent steel column (13) are arc-shaped, and the inner diameter of the arc matches the outer diameter of the permanent steel column (13).

3. The movable cantilever crane suitable for limited space according to claim 2, characterized in that: The distance between the lower positioning steel plate (14) and the ground is 18 m, and the distance between the lower positioning steel plate (14) and the upper positioning steel plate (5) is 1.9 m.

4. The movable cantilever crane suitable for limited space according to claim 1, characterized in that: The steel casing (6) and the positioning steel pipe column (8) are located on the same axis, and the distance between the positioning steel pipe column (8) and the permanent steel column (13) is 20 cm.

5. The movable cantilever crane suitable for limited space according to claim 1, characterized in that: The included angle between the lower positioning steel plate (14) and the diagonal bracing steel plate (9) is 45°.

6. The movable cantilever crane suitable for limited space according to claim 1, characterized in that: The long side of the lower positioning steel plate (14) is vertically welded to the limiting steel plate (7), and the short side of the limiting steel plate (7) is vertically welded to the movable steel pipe column (2).

7. The movable cantilever crane suitable for limited space according to claim 1, characterized in that: The A-shaped steel frame (1) comprises a transverse channel steel (101), the transverse channel steel (101) being vertically fixedly connected to a vertical support channel steel (103), one end of the transverse channel steel (101) and the top of the vertical support channel steel (103) being jointly fixedly connected to an obliquely-tensioned butt-welded angle steel (102), the transverse channel steel (101) and the obliquely-tensioned butt-welded angle steel (102) being fully welded to a movable steel pipe column (2), a walking track crossbeam (4) being arranged at the bottom of the transverse channel steel (101), and the walking track crossbeam (4) being slidably connected to an electric hoist (3).

8. The movable cantilever crane suitable for limited space according to claim 7, characterized in that: The distance between the vertical supporting channel steel (103) and the movable steel pipe column (2) is 3 m.

9. The movable cantilever crane suitable for limited space according to claim 7, characterized in that: The welding point between the transverse channel steel (101) and the movable steel pipe column (2) is located 15 cm above the upper end surface of the lower positioning steel plate (14), and the welding point between the inclined butt-welded angle steel (102) and the movable steel pipe column (2) is located 20 cm below the top end of the movable steel pipe column (2).

10. The movable cantilever crane suitable for limited space according to claim 7, characterized in that: A crossbeam limiting steel plate (10) is welded to one end of the transverse channel steel (101) away from the permanent steel column (13), and two ear plates (11) are welded to the other side of the crossbeam limiting steel plate (10), and a cable wind rope (12) runs through the two ear plates (11).

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