A method for setting and installing a tower crane for expansion of a large plant with multi-layer platforms

Abstract

The present application relates to the technical field of tower crane equipment installation scheme, specifically to a tower crane setting and installation method for expansion of a large plant with multiple platforms, which selects a tower crane satisfying hoisting performance in combination with the height of the plant to be transformed or expanded and the weight of the steel structural member, determines the position of the tower crane setting in combination with the dismounting mode of the subsequent tower crane, then uses the self-lifting performance of the tower body to lift the tower body above the roof of the positioning position of the plant, and then completes the positioning work of the balance arm, hoisting arm and the like of the tower crane on the roof of the plant, thereby completing the setting and installation work of the tower crane, realizing the vertical hoisting work of the steel structural member of the plant to be transformed or expanded, reducing the positioning difficulty of the large steel structural member after the roof of the plant is closed, and ensuring the progress of the engineering construction.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of tower crane equipment installation scheme, in particular to a tower crane setting and installation method for expansion of a large plant with multiple platforms. BACKGROUND

[0002] When a large metallurgical production plant with high and low spans and overall layout is partially modified or expanded, the remaining plant generally cannot affect the normal production of other production lines except for the modified or expanded area. When a large metallurgical plant structure is newly built, large mobile hoisting equipment is usually used for plant steel structure construction, which is set in the span or outside the span of the plant structure layout to complete the hoisting of steel structure members in sections and layers. In the modification or expansion project, because it is a partial construction of the plant structure and the overall roof of the plant is closed, the large mobile hoisting equipment cannot enter the construction area, so the steel structure members in the modification or expansion work cannot be hoisted by the mobile hoisting equipment, the vertical hoisting of the members is difficult and the construction efficiency is low, which restricts the progress of the project. SUMMARY

[0003] To solve the above problems, the present application provides a tower crane setting and installation method for expansion of a large plant with multiple platforms, which realizes the vertical hoisting of the steel structure members of the modified or expanded plant, reduces the difficulty of placing large steel structure members after the plant roof is closed, and ensures the progress of the project.

[0004] To achieve the above purpose, the present application provides a tower crane setting and installation method for expansion of a large plant with multiple platforms, which selects a tower crane that meets the hoisting performance in combination with the height of the modified or expanded plant and the weight of the steel structure members, determines the position of the tower crane in combination with the disassembly mode of the subsequent tower crane, uses the self-lifting performance of the tower body to lift the tower body above the roof at the positioning position of the plant, and then completes the positioning work of the balance arm, hoisting arm, etc. of the tower crane on the roof of the plant, thereby completing the setting and installation of the tower crane. The steps are as follows:

[0005] The present application provides a tower crane setting and installation method for expansion of a large plant with multiple platforms, which selects a tower crane that meets the hoisting performance in combination with the height of the modified or expanded plant and the weight of the steel structure members, determines the position of the tower crane in combination with the disassembly mode of the subsequent tower crane, uses the self-lifting performance of the tower body to lift the tower body above the roof at the positioning position of the plant, and then completes the positioning work of the balance arm, hoisting arm, etc. of the tower crane on the roof of the plant, thereby completing the setting and installation of the tower crane. The steps are as follows: BRIEF DESCRIPTION OF DRAWINGS

[0006] Figure 1 is a tower body positioning and jacking schematic diagram of a tower crane setting and installation method for expansion of a large plant containing multi-layer platforms;

[0007] Figure 2 is a balance arm installation schematic diagram;

[0008] Figure 3 is a hoisting arm installation schematic diagram;

[0009] Figure 4 is a tower crane setting completion schematic diagram.

[0010] In the figure: 1, standard section 2, jacking frame 3, tower cap 4, balance arm 5, balance weight 6, balance arm pull rod 7, hoisting arm 8, hoisting arm pull rod 9, low-layer roof 10, high-layer roof 11, jacking hole 12, hoisting hole 13, hoisting mast. DETAILED DESCRIPTION

[0011] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, not all the embodiments.

[0012] Embodiment 1

[0013] On the basis of the original 2 120t converter configuration of a steelmaking plant, a set of 120t converter is expanded and transformed, involving steelmaking high-span steel structure transformation and expansion steel structure construction total amount of nearly 2000t, the transformation and expansion area contains 6-layer equipment steel structure platform installation, the total height of the expanded plant is 52m, and the width is 24m. A tower crane setting and installation method for expansion of a large plant containing multi-layer platforms is adopted. Under the premise of closing the high and low layer roofs of the original plant, the setting of a large tower crane is realized, and the problem of vertical hoisting of large expansion plant steel structure members is solved. For details, see the accompanying drawings. The tower crane setting and installation method for expansion of a large plant containing multi-layer platforms is to select a tower crane that meets the hoisting performance in combination with the height of the transformed or expanded plant and the weight of the steel structure member, determine the position of the tower crane setting in combination with the subsequent tower crane disassembly mode, then use the self-lifting performance of the tower body to jacking the tower body above the roof of the positioning position in the plant, and then complete the positioning work of the balance arm, hoisting arm and the like of the tower crane on the roof of the plant, so as to complete the setting and installation of the tower crane. The steps are as follows:

[0014] As shown in Figure 1 , the first step is tower crane selection and ground position positioning:

[0015] According to the location of the plant reconstruction or expansion, the height of the existing plant structure, the location and weight of the steel structure components, select the tower crane model that meets the lifting performance;

[0016] According to the subsequent disassembly of the tower crane on the low-level roof 9, select the high-level roof 10 to reserve a small amount of steel structure components for temporary installation, which can leave a position that meets the tower crane descending to the low-level roof 9 and the balance arm 4 is not blocked by the descending structure, and at this time the tower crane lifting radius can meet the lifting of the plant reconstruction or expansion steel structure components, this position is the tower crane positioning position;

[0017] As shown in Figure 1 , the second step: jacking up the tower body:

[0018] On the low-level roof 9 above the tower crane positioning position, open a jacking hole 11 with a four-side size of 100 mm larger than the top lifting frame 2;

[0019] Then use the truck crane to assemble the standard section 1, top lifting frame 2, tower cap 3, etc. on the low-level roof 9, and use the tower crane self-lifting performance, the truck crane cooperates with the standard section 1 feeding to realize the tower body lifting out of the low-level roof 9;

[0020] As shown in Figure 2 , Figure 3 , the third step: balance arm 4 and hoist arm installation:

[0021] Use the hoisting mast 13 set on the low-level roof 9, use the balance arm pull rod 6, first realize the connection and fixation of the balance arm 4 and the tower body, then install the balance weight 5 in place and rotate the tower body by 180 0, continue to use the hoisting mast 13, through the hoist arm pull rod 8, realize the connection and fixation of the assembled hoist arm 7 and the tower body;

[0022] As shown in Figure 4 , the fourth step: tower crane jacking and lifting hole setting:

[0023] Continue to jack up the tower crane until the hoist arm 7 is higher than the high-level roof 10, at this time if the tower body of the tower crane has exceeded the maximum independent height, use the attachment device to connect with the low-level roof 9 beam or nearby low-level plant steel column to ensure the stability of the tower body as a whole;

[0024] According to the channel for the installation of steel structure components and the length and width of the steel structure components, open the lifting hole 12 on the low-level roof 9 according to the above factors, which is used for the tower crane to lift the steel structure components and other lifting articles from the ground through the lifting hole 12.

Claims

1. A method of setting and installing a tower crane for an extension of a large plant having a multi-story platform, characterized by, The steps are as follows: Step 1: tower crane selection and ground position positioning: Combined with the location of the plant reconstruction or expansion, the height of the existing plant structure, the position and weight of the steel structure member in place, select the tower crane model that meets the hoisting performance; According to the subsequent disassembly of the tower crane on the low-level roof (9), select a small amount of steel structure member on the high-level roof (10) to be temporarily not installed, which can leave a position that meets the tower crane descending to the low-level roof (9) and the balance arm (4) is not blocked by the descending structure, and at this time the tower crane hoisting radius can meet the hoisting of the plant reconstruction or expansion steel structure member, and this position is the tower crane positioning position; Step 2: tower body jacking: Open a jacking hole (11) on the low-level roof (9) above the tower crane positioning position; Then use the truck crane to assemble the standard section (1), jacking frame (2), and tower cap (3) in low altitude online, and use the tower crane self-lifting performance, truck crane feeding standard section (1), to realize the tower body lifting out of the low-level roof (9); Step 3: balance arm (4), hoisting arm installation: The crane mast (13) is arranged on the low-layer roof (9), the balance arm pull rod (6) is applied to realize the connection and fixation of the balance arm (4) and the tower body, the balance counterweight (5) is installed in place and rotated by 180 0 The tower body, the crane mast (13) is continuously used, the assembled integral crane arm (7) is connected and fixed with the tower body through the crane arm pull rod (8). Step 4: tower crane jacking and hoisting hole setting: Continue to jack up the tower crane until the hoisting arm (7) is higher than the high-level roof (10), at this time if the tower body of the tower crane has exceeded the maximum independent height, then use the attachment device to connect with the low-level roof (9) beam or nearby low-level plant steel column to ensure the stability of the tower body as a whole; According to the channel of the steel structure member installation and the length and width size of the steel structure member, and considering the above factors, open a hoisting hole (12) on the low-level roof (9).

2. The method of claim 1, wherein the method is characterized by: The jacking hole (11) opened on the low-level roof (9) is 100 mm larger than the four edges of the jacking frame (2).

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