Integral hoisting construction method for large steel coal bucket

Abstract

An integral hoisting construction method for a large steel coal bucket comprises the following steps that a proper hoisting tool is selected according to the weight of the steel coal bucket and the working condition of the hoisting tool; appropriate transportation equipment is selected to transport the steel coal bucket to a hoisting construction site; selecting a proper main crane and an auxiliary crane according to the weight of the steel coal bucket; determining lifting point positions of the main crane and the auxiliary crane; correspondingly connecting a lifting appliance on the main crane to a main lifting point on the steel coal bucket, and correspondingly connecting a lifting appliance on the auxiliary crane to an auxiliary lifting point on the steel coal bucket; operating the main crane and the auxiliary crane to turn over the steel coal bucket; and the lifting appliance on the auxiliary crane is separated from the steel coal bucket, and the steel coal bucket is lifted to the coal bucket foundation to be installed in place through the main crane. According to the method, an integral hoisting mode is adopted, most construction procedures are transferred to a processing plant area to be completed, and the welding quality can be effectively guaranteed; and secondly, the hoisting work speed is high, the quality is stable, the high-altitude work amount is small, the safety coefficient is large, the hoisting cost is reduced, and the production efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of building construction, and in particular to a method for integrally hoisting a large steel coal hopper. Background Art

[0002] During the construction of the main building of a large power plant, the installation of the steel coal hopper is a crucial step in ensuring the on-schedule completion of the entire plant. Steel coal hoppers are typically large in size and tonnage, and are installed at a high altitude (usually 25 to 30 meters) inside the main building, making installation quite challenging. Currently, the main method for installing steel coal hoppers in power plants is bulk installation, which is time-consuming, labor-intensive, and increases safety risks. Summary of the Invention

[0003] In order to solve the technical problems existing in the above technology, it is necessary to provide a large steel coal hopper integral hoisting construction method.

[0004] A large steel coal hopper integral hoisting construction method includes the following steps: Step S1: Select a suitable spreader according to the weight of the steel coal hopper and the spreader working condition; Step S2: Select appropriate transportation equipment according to the weight of the steel coal hopper to transport the steel coal hopper to the hoisting construction site; select appropriate main crane and auxiliary crane according to the weight of the steel coal hopper; Step S3: Determine the lifting point positions of the main crane and the auxiliary crane according to the stress conditions of various parts of the steel coal hopper; Step S4: according to the confirmed lifting point positions, the lifting tools on the main crane are connected to the main lifting points on the steel coal hopper, and the lifting tools on the auxiliary crane are connected to the auxiliary lifting points on the steel coal hopper; Step S5: Operate the main crane and the auxiliary crane to turn over the steel coal hopper so that the large diameter end of the steel coal hopper faces upward and the small diameter end faces downward; Step S6: Separate the lifting device on the auxiliary crane from the steel coal hopper, and use the main crane to lift the steel coal hopper onto the coal hopper foundation and install it in place.

[0005] Preferably, in step S4, the main lifting point is located on the square section of the steel coal hopper, and the auxiliary lifting point is located on the cone portion of the steel coal hopper.

[0006] Preferably, in step S5, the following method is used when turning over the steel coal hopper: The main crane and the auxiliary crane move outward from their original positions at the same time, keeping the slings at the lifting points perpendicular to the crane hooks; The main crane hooks up and pulls up the steel coal hopper, making it tilt at 45 degrees; The main crane continues to hook up and pull the steel coal hopper, turning it 90 degrees and making it horizontal. Then the main crane and the auxiliary crane simultaneously hook up and move the steel coal hopper off the ground and suspend it in the air. The auxiliary crane remains stationary, and the main crane continues to lift the hook and pull up the steel coal hopper, so that the steel coal hopper turns over 180 degrees, with the large diameter end of the steel coal hopper facing upwards and the small diameter end facing downwards, completing the turning over.

[0007] Preferably, the steel coal hopper is adjusted to a suspended height of not less than 10 cm from the ground.

[0008] Preferably, the auxiliary lifting point is 300 mm away from the small diameter end surface of the steel coal hopper.

[0009] Preferably, there are four main lifting points and four auxiliary lifting points. The four main lifting points are evenly distributed on the square section of the steel coal hopper, and each main lifting point is at a 45° angle to the diameter of the steel coal hopper. The four auxiliary lifting points are evenly distributed on the conical part of the steel coal hopper, and each auxiliary lifting point is at a 45° angle to the diameter of the steel coal hopper.

[0010] Preferably, the slings on the main crane are correspondingly connected to the two main lifting points on the same side, and the slings on the auxiliary crane are correspondingly connected to the two auxiliary lifting points on the side opposite to the main lifting points, so that there is a certain distance between the slings on the main crane and the slings on the auxiliary crane when they are kept in a vertical state.

[0011] Compared with the existing technology, the overall hoisting construction method of a large steel coal hopper provided by the present invention adopts an overall hoisting construction process, which transfers most of the construction processes to the processing plant area for completion. The construction quality is easy to control and the welding quality can be effectively guaranteed. Secondly, the hoisting work speed is fast, the quality is stable, the amount of high-altitude work is small, the safety factor is high, the hoisting cost is reduced, and the production efficiency is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 This is a schematic diagram of the 0° steel coal hopper hoisting of the present invention.

[0014] Figure 2 This is a schematic diagram of the 45° steel coal hopper hoisting of the present invention.

[0015] Figure 3 This is a schematic diagram of the 90° steel coal hopper hoisting of the present invention.

[0016] Figure 4 This is a schematic diagram of the 180° steel coal hopper hoisting of the present invention.

[0017] Figure 5 It is a structural schematic diagram of the steel coal hopper of the present invention.

[0018] In the figure: main crane 01, auxiliary crane 02, steel coal hopper 03, main lifting point 04, auxiliary lifting point 05. DETAILED DESCRIPTION

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts shall fall within the scope of protection of the present invention.

[0020] In the description of the present invention, it should be understood that the terms "upper", "middle", "outer", "inner", "lower" and the like indicating directions or positional relationships are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the components or elements referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting the present invention.

[0021] Taking the Wuwei Thermal Power Steel Coal Hoisting Project as an example, the coal hopper weighs 28t, the straight section diameter is 7800mm, and the height is 6800mm; the hoisting construction method includes the following steps: Step S1: Select a suitable sling according to the weight of the steel coal hopper and the working condition of the sling; the sling can be a steel wire rope; Step S2: Select appropriate transportation equipment based on the weight of the steel coal hopper to transport the steel coal hopper to the lifting construction site; select appropriate main crane and auxiliary crane based on the weight of the steel coal hopper; among them, a 650t crawler crane is used as the main crane, and a 50t crawler crane is used as the auxiliary crane; Step S3: Determine the lifting point positions of the main crane and the auxiliary crane according to the stress conditions of various parts of the steel coal hopper; Step S4: according to the confirmed lifting point positions, the lifting tools on the main crane are connected to the main lifting points on the steel coal hopper, and the lifting tools on the auxiliary crane are connected to the auxiliary lifting points on the steel coal hopper; Step S5: Operate the main crane and the auxiliary crane to turn over the steel coal hopper so that the large diameter end of the steel coal hopper faces upward and the small diameter end faces downward; Step S6: Separate the lifting device on the auxiliary crane from the steel coal hopper, and use the main crane to lift the steel coal hopper to the 27.75m coal hopper foundation and install it in place.

[0022] For the wire rope, the wire rope on the main crane is selected in the following ways: The diameter of the wire rope is d = (K×P / .35×4×6) 1 / 2, and 6×37-43.0 right-hand twist is selected, with a length of 30-32m.

[0023] The wire rope on the auxiliary crane is selected in the following ways: The wire rope used for turning over is d= (K×P / .35×4×6) 1 / 2, and 6×37-43.0 right-hand twisted rope with a length of 6.5-7m is selected.

[0024] Specifically, in step S4, the main lifting point is located on the square section of the steel coal hopper, and the auxiliary lifting point is located on the cone portion of the steel coal hopper.

[0025] Among them, there are four main lifting points and four auxiliary lifting points. The four main lifting points are evenly distributed on the square section of the steel coal hopper, and each main lifting point is at a 45° angle to the diameter of the steel coal hopper. The four auxiliary lifting points are evenly distributed on the conical part of the steel coal hopper, and each auxiliary lifting point is at a 45° angle to the diameter of the steel coal hopper.

[0026] Specifically, when connecting the slings to the lifting points on the steel coal hopper, the slings on the main crane are connected to the two main lifting points on the same side, and the slings on the auxiliary crane are connected to the two auxiliary lifting points on the opposite side of the main lifting points, so that there is a certain distance between the slings on the main crane and the slings on the auxiliary crane when they are kept in a vertical state.

[0027] Please see Figures 1 to 4 Specifically, in step S5, the following method is used when turning over the steel coal hopper: The main crane and the auxiliary crane move outward from their original positions at the same time, keeping the slings at the lifting points perpendicular to the crane hooks. At this time, the steel coal hopper is not turned over and is at the initial state of 0°; The main crane hooks up and pulls up the steel coal hopper, making it tilt at 45 degrees; The main crane continues to hook up and pull the steel coal hopper, turning it 90 degrees and making it horizontal. Then the main crane and the auxiliary crane simultaneously hook up and move the steel coal hopper off the ground and suspend it in the air. The auxiliary crane remains stationary, and the main crane continues to lift the hook and pull up the steel coal hopper, so that the steel coal hopper turns over 180 degrees, with the large diameter end of the steel coal hopper facing upwards and the small diameter end facing downwards, completing the turning over.

[0028] Among them, the suspended height of the steel coal hopper from the ground is not less than 10cm.

[0029] Among them, the auxiliary lifting point is 300mm away from the small diameter end face of the steel coal hopper.

[0030] The above disclosure is only a preferred embodiment of the present invention, and it is certainly not intended to limit the scope of the present invention. A person skilled in the art can understand that all or part of the processes of the above embodiment and equivalent changes made in accordance with the claims of the present invention are still within the scope of the invention.

Claims

1. A large steel coal hopper integral hoisting construction method, characterized by: The following steps are included: Step S1: Select a suitable spreader according to the weight of the steel coal hopper and the spreader working condition; Step S2: Select appropriate transportation equipment according to the weight of the steel coal hopper to transport the steel coal hopper to the hoisting construction site; select appropriate main crane and auxiliary crane according to the weight of the steel coal hopper; Step S3: Determine the lifting point positions of the main crane and the auxiliary crane according to the stress conditions of various parts of the steel coal hopper; Step S4: according to the confirmed lifting point positions, the lifting tools on the main crane are connected to the main lifting points on the steel coal hopper, and the lifting tools on the auxiliary crane are connected to the auxiliary lifting points on the steel coal hopper; Step S5: Operate the main crane and the auxiliary crane to turn over the steel coal hopper so that the large diameter end of the steel coal hopper faces upward and the small diameter end faces downward; Step S6: Separate the lifting device on the auxiliary crane from the steel coal hopper, and use the main crane to lift the steel coal hopper onto the coal hopper foundation and install it in place.

2. The large steel coal hopper integral hoisting construction method according to claim 1 is characterized in that: In step S4, the main lifting point is located on the square section of the steel coal hopper, and the auxiliary lifting point is located on the cone portion of the steel coal hopper.

3. The large steel coal hopper integral hoisting construction method according to claim 2 is characterized in that: In step S5, the following method is used to turn over the steel coal hopper: The main crane and the auxiliary crane move outward from their original positions at the same time, keeping the slings at the lifting points perpendicular to the crane hooks; The main crane hooks up and pulls up the steel coal hopper, making it tilt at 45 degrees; The main crane continues to hook up and pull the steel coal hopper, turning it 90 degrees and making it horizontal. Then the main crane and the auxiliary crane simultaneously hook up and move the steel coal hopper off the ground and suspend it in the air. The auxiliary crane remains stationary, and the main crane continues to lift the hook and pull up the steel coal hopper, so that the steel coal hopper turns over 180 degrees, with the large diameter end of the steel coal hopper facing upwards and the small diameter end facing downwards, completing the turning over.

4. The large steel coal hopper integral hoisting construction method according to claim 3 is characterized in that: Adjust the steel coal hopper to a height of no less than 10 cm from the ground.

5. The large steel coal hopper integral hoisting construction method according to claim 2 is characterized in that: The auxiliary lifting point is 300mm away from the small diameter end face of the steel coal hopper.

6. The large steel coal hopper integral hoisting construction method according to claim 2 is characterized in that: There are four main lifting points and four auxiliary lifting points. The four main lifting points are evenly distributed on the square section of the steel coal hopper. Each main lifting point is at a 45° angle to the diameter of the steel coal hopper. The four auxiliary lifting points are evenly distributed on the conical part of the steel coal hopper. Each auxiliary lifting point is at a 45° angle to the diameter of the steel coal hopper.

7. The large steel coal hopper integral hoisting construction method according to claim 6 is characterized in that: The slings on the main crane are connected to the two main lifting points on the same side, and the slings on the auxiliary crane are connected to the two auxiliary lifting points on the opposite side of the main lifting points, so that there is a certain distance between the slings on the main crane and the slings on the auxiliary crane when they are kept in a vertical state.

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