A combined hoisting method for large air compressors in confined spaces

Abstract

The present invention relates to a combined hoisting method for a large air compressor in a confined space, comprising the following steps: Step 1: making a storage platform and a storage base for the air compressor; Step 2: air compressor foundation treatment; Step 3: first hoisting of the air compressor; Step 4: secondary hoisting of the air compressor. The present invention adopts a temporary storage platform and a method of adjusting the steel wire rope, which solves the technical problem that the air compressor is difficult to hoist into place without dismantling the steel structure of the factory building, avoids safety hazards such as collision between the lifting machinery and the steel structure of the factory building, and jamming of the rod, is safe and reliable, has high construction efficiency, and has a certain prospect for promotion and application.

Description

Technical Field

[0001] The invention relates to the technical field of air compressor installation, and in particular to a combined hoisting method for a large air compressor in a confined space. Background Art

[0002] Large air compressor units are one of the important equipment in air separation projects. In large air separation projects, air compressor units are usually installed on a concrete platform in the compressor unit plant, and their weight often exceeds 100t. In order to save investment, the lifting machinery in the compressor unit plant can only meet the maintenance and lifting of auxiliary equipment, and cannot lift the large air compressor unit body. Due to the height of the plant, it is impossible to directly use large lifting machinery in the plant for lifting, and it is necessary to dismantle part of the steel structure of the plant before it can be implemented. If the cross-over lifting is adopted, the crane and the steel structure of the plant will interfere with each other, and it is also necessary to dismantle part of the steel structure before it can be implemented. These traditional construction methods not only have a long construction period, but also require many high-altitude operations such as dismantling and restoring the steel structure of the plant, high safety risks, and leakage hazards. Therefore, it is of great significance to develop a combined lifting method for large air compressors in confined spaces to solve the technical difficulties of lifting large air compressor units under conditions of severely limited construction space, which is of great significance to ensure the safety of the air compressor installation process and improve construction efficiency. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a combined lifting method for a large air compressor in a confined space. By adopting a temporary storage platform and a method of adjusting the wire rope, the technical problem of the difficulty in lifting the air compressor into place without dismantling the steel structure of the factory building is solved, and safety hazards such as collision between the lifting machinery and the steel structure of the factory building and jamming of the rods are avoided.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a combined hoisting method for a large air compressor in a confined space, comprising the following steps:

[0005] Step 1: Make the storage platform and base of the air compressor;

[0006] Before the air compressor is brought to the site, a hoisting opening is reserved on the roof of the factory building, and a temporary platform is set up, and rainproof measures are taken with colored strips of cloth; according to the air compressor foundation, a storage platform and a storage base are made; the storage platform and the storage base are installed in sequence, and a pin is reserved on one side of the storage base to match the storage platform, and the other side is installed on the air compressor foundation;

[0007] Step 2: Basic treatment of air compressor;

[0008] Install the pad on the air compressor foundation as required, and clean the rust and oil stains on the surface of the embedded parts of the air compressor foundation;

[0009] Step 3: First hoisting of the air compressor;

[0010] According to the weight of the air compressor, select appropriate lifting machinery, and hoist the air compressor to the storage base outside the factory through the reserved hoisting port on the roof. After the air compressor is stable, use the fall chain to fix the air compressor, unload the crane hook and remove the original wire rope;

[0011] Step 4: Secondary lifting of the air compressor;

[0012] Connect a new set of steel wire ropes to the upper part of the original steel wire rope, and hoist the air compressor again; slowly lift the air compressor to 200mm above the storage base, use the fall chain and the factory crane to move the storage base, and then use the factory crane to hoist the air compressor base into place; slowly turn the crane until the air compressor is hoisted into place, and strictly monitor the distance between the steel wire rope and the main beam of the factory steel structure during the hoisting process; after the air compressor is hoisted into place, remove the steel wire rope and lifting slings in turn.

[0013] As a supplement to the technical solution described in the present invention, the storage platform is composed of columns, four-layer beams, diagonal braces and a bottom plate. The columns and beams are made of HW400 H-shaped steel, the diagonal braces are made of No. 10 channel steel, and the bottom plate is made of 40mm steel plate. The columns are connected and fixed to the air compressor foundation and the factory platform, and the air compressor foundation embedded parts are welded and fixed on one side of the middle part of the storage platform.

[0014] As a supplement to the technical solution described in the present invention, the storage base is composed of a second column, a second crossbeam and a second diagonal brace. The second crossbeam and the second column are made of 20# I-beam, and the second diagonal brace is made of 8# channel steel.

[0015] Beneficial effect: The present invention relates to a combined lifting method for a large air compressor in a confined space. The method adopts a temporary storage platform and an adjustment method of the steel wire rope. Under the premise of not dismantling the steel structure of the factory building, the technical problem of the air compressor being difficult to lift into place is solved, and potential safety hazards such as collision between the lifting machinery and the steel structure of the factory building and jamming of the rods are avoided. The method is safe and reliable, with high construction efficiency, and has certain prospects for promotion and application. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the first hoisting and temporary storage of the present invention;

[0017] Figure 2 It is a schematic diagram of the structure of the steel wire rope after being extended in the present invention;

[0018] Figure 3 It is a structural schematic diagram of the secondary lifting of the air compressor of the present invention, with the storage base removed;

[0019] Figure 4 It is a structural schematic diagram of the air compressor of the present invention being hoisted into place.

[0020] Illustration: 1. Air compressor foundation, 2. Storage platform, 3. Storage base, 4. Air compressor, 5. Original steel wire rope, 6. New steel wire rope, 7. Main beam of factory steel structure, 8. Embedded parts of air compressor foundation. DETAILED DESCRIPTION

[0021] The present invention will be further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not intended to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms fall within the scope limited by the appended claims of the application equally.

[0022] The embodiment of the present invention relates to a combined hoisting method for a large air compressor in a confined space, such as Figure 1-4 As shown, the following steps are included:

[0023] Step 1: Make a storage platform 2 and a storage base 3 for the air compressor 4;

[0024] Before the air compressor 4 is brought into the site, a hoisting opening is reserved on the roof of the factory building, and a temporary platform is set up, and rainproof measures are taken with colored strips of cloth; based on the air compressor foundation 1, a storage platform 2 and a storage base 3 are made;

[0025] The storage platform 2 is composed of columns, four-layer beams, diagonal braces and a bottom plate. The columns and beams are made of HW400 H-shaped steel, the diagonal braces are made of No. 10 channel steel, and the bottom plate is made of 40mm steel plate. The columns are connected and fixed to the air compressor foundation 1 and the plant platform. The air compressor foundation embedded part 8 is welded and fixed on one side of the middle part of the storage platform 2;

[0026] The storage base 3 is composed of a second column, a second crossbeam and a second diagonal brace. The second crossbeam and the second column are made of 20# I-beam steel, and the second diagonal brace is made of 8# channel steel.

[0027] The storage platform 2 and the storage base 3 are installed in sequence, wherein a pin buckle is left on one side of the storage base 3 to match the storage platform 2, and the other side is installed on the air compressor foundation 1;

[0028] Step 2: Air compressor basic 1 processing;

[0029] Install the pad on the air compressor foundation 1 as required, and clean the rust and oil stains on the surface of the embedded parts of the air compressor foundation;

[0030] Step 3: The first hoisting of air compressor 4;

[0031] According to the weight of the air compressor 4, select a suitable lifting machinery, and hoist the air compressor 4 onto the storage base 3 outside the factory through the reserved hoisting port on the roof. After the air compressor 4 is stable, use the fall chain to fix the air compressor 4, unload the crane and remove the original wire rope 5;

[0032] Step 4: Secondary lifting of air compressor 4;

[0033] Connect a new set of steel wire ropes 6 to the upper part of the original steel wire rope 5, and hoist the air compressor 4 again; slowly lift the air compressor 4 to 200mm above the storage base 3, use the fall chain and the factory crane to transport the storage base 3, and then use the factory crane to hoist the air compressor base into place; slowly turn the crane until the air compressor 4 is hoisted into place, and strictly monitor the distance between the steel wire rope and the main beam 7 of the factory steel structure during the hoisting process; after the air compressor 4 is hoisted into place, remove the steel wire rope and lifting slings in turn.

[0034] In the description of the present invention, it is necessary to understand that the directions or positional relationships indicated by directional words such as "front, back, up, down, left, right", "lateral, vertical, perpendicular, horizontal" and "top, bottom" are usually based on the directions or positional relationships shown in the drawings. They are only for the convenience of describing the present invention and simplifying the description. Unless otherwise specified, these directional words do not indicate or imply that the devices or elements referred to must have a specific direction or be constructed and operated in a specific direction. Therefore, they cannot be understood as limiting the scope of protection of the present invention. The directional words "inside and outside" refer to the inside and outside relative to the contours of each component itself.

[0035] For ease of description, spatially relative terms such as "above", "above", "on the upper surface of", "above", etc. may be used here to describe the spatial positional relationship between a device or feature and other devices or features as shown in the figure. It should be understood that spatially relative terms are intended to include different orientations of the device in use or operation in addition to the orientation described in the figure. For example, if the device in the accompanying drawings is inverted, the device described as "above other devices or structures" or "above other devices or structures" will be positioned as "below other devices or structures" or "below other devices or structures". Thus, the exemplary term "above" may include both "above" and "below". The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatially relative descriptions used here are interpreted accordingly.

[0036] In addition, it should be noted that the use of terms such as "first" and "second" to limit components is only for the convenience of distinguishing the corresponding components. If not otherwise stated, the above terms have no special meaning and therefore cannot be understood as limiting the scope of protection of the present invention.

[0037] The above is a detailed introduction to the combined lifting method of a large air compressor in a confined space provided by the present application. This article uses specific examples to illustrate the principles and implementation methods of the present application. The description of the above embodiments is only used to help understand the method of the present application and its core idea; at the same time, for general technical personnel in this field, according to the idea of ​​the present application, there will be changes in the specific implementation method and application scope. In summary, the content of this specification should not be understood as a limitation on the present application.

Claims

1. A combined hoisting method for a large air compressor in a confined space, characterized in that: The following steps are involved: Step 1: Make a storage platform (2) and a storage base (3) for the air compressor (4); Before the air compressor (4) is brought into the site, a hoisting opening is reserved on the roof of the factory building, and a temporary platform is set up, and rainproof measures are taken with colored strips of cloth; according to the air compressor foundation (1), a storage platform (2) and a storage base (3) are made, wherein the storage platform (2) is composed of a first column, a first crossbeam of four layers, a first diagonal brace and a bottom plate, wherein the first diagonal brace is made of No. 10 channel steel, and the bottom plate is made of 40 mm steel plate, the first column is connected and fixed to the air compressor foundation (1) and the factory building platform, and an air compressor foundation embedded part (8) is welded and fixed on one side of the middle of the storage platform (2); the storage platform (2) and the storage base (3) are installed in sequence, wherein a pin is left on one side of the storage base (3) to match the storage platform (2), and the other side is installed on the air compressor foundation (1); Step 2: Air compressor foundation (1) processing; Install the pad on the air compressor foundation (1) as required, and clean the rust and oil stains on the surface of the air compressor foundation embedded parts (8); Step 3: First hoisting of the air compressor (4); According to the weight of the air compressor (4), select a suitable lifting machine, and hoist the air compressor (4) onto the storage base (3) outside the factory through the reserved hoisting opening on the roof. After the air compressor (4) is stable, use a fall chain to fix the air compressor (4), unload the hook of the crane and remove the original wire rope (5); Step 4: Secondary lifting of the air compressor (4); Connect a new set of steel wire ropes (6) to the upper part of the original steel wire rope (5), and hoist the air compressor (4) again; slowly lift the air compressor (4) to 200 mm above the storage base (3), use the fall chain and the factory crane to move the storage base (3), and then use the factory crane to hoist the air compressor base into place; slowly turn the crane until the air compressor (4) is hoisted into place, and strictly monitor the distance between the steel wire rope and the main beam (7) of the factory steel structure during the hoisting process; after the air compressor (4) is hoisted into place, remove the steel wire rope and the lifting slings in turn.

2. The method for combined hoisting of a large air compressor in a confined space according to claim 1, characterized in that: The storage base (3) is composed of a second column, a second crossbeam and a second diagonal brace. The second crossbeam and the second column are made of 20# I-beam, and the second diagonal brace is made of 8# channel steel.

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