Dust removal pipeline hoisting method

Abstract

The invention provides a dust removal pipeline hoisting method, and relates to the technical field of dust removal pipeline hoisting, and the dust removal pipeline hoisting method is used for installing a second pipeline between two existing brackets below a first pipeline which has been operated, and arranging a first lifting lug and a second lifting lug at an interval in the circumferential direction of the outer wall of the second pipeline; operating the first crane to hoist the second pipeline to a preset installation elevation position; the first crane is operated, and one end of the second pipeline horizontally penetrates into an existing support; a lifting rope of a second crane bypasses the side, deviating from the second pipeline, of the first pipeline and is connected with a second lifting lug, lifting of the second crane is matched with descending of the rope of the first crane, and the second pipeline is driven to rotate and swing around a swing shaft in the length direction of the second pipeline until the second pipeline rotates to the position under the first pipeline; and the other end of the second pipeline penetrates into the other existing bracket. According to the dust removal pipeline hoisting method, the dust removal pipeline can be additionally arranged under the condition that normal production is not affected.

Description

Technical Field

[0001] This invention relates to the field of dust removal pipeline hoisting technology, and in particular to a method for hoisting dust removal pipelines. Background Technology

[0002] Dust collection ducts are responsible for safely and efficiently transporting high-temperature, high-dust fumes, sometimes containing sparks or flammable gases, generated in various steelmaking processes to dust collection equipment. The large-diameter main and connecting ducts for secondary dust collection in the smelting workshop are typically located on the roof and laid overhead. The design and construction of dust collection ducts must not only meet the technical requirements for process airflow and velocity but also be precisely coordinated spatially with the existing structure of the plant and production facilities to ensure safe distances.

[0003] In actual workshop renovation or capacity expansion projects, the challenge of adding new dust collection ducts in areas with dense existing facilities is frequently encountered. Taking an area outside a steelmaking workshop as an example, two large dust collection ducts are already in operation on an east-west elevated support structure. Below these ducts lies a major production route for daily railway transport vehicles. Due to process upgrades, a third dust collection duct with a diameter of 4020mm must be added within the limited space beneath the existing two ducts. Traditional construction methods cannot accommodate the addition of such a large-diameter dust collection duct in an industrial environment without disrupting normal railway transport below. Specific problems include:

[0004] 1. The new pipeline needs to be installed within the internal space of the existing operating supports, and the railway transportation beneath the supports is crucial for continuous production and cannot be interrupted. This severely restricts the positioning of construction machinery and the pipeline hoisting path, making conventional hoisting and positioning methods impossible.

[0005] 2. The individual pipe is enormous (4.02 meters in diameter, 22 meters in installation height) and heavy. To complete the installation, it is necessary to wait for a planned shutdown maintenance window in the workshop, and use a large crane to lift the pipe at an angle and insert it into the narrow gaps in the support frame, followed by manual fine-tuning and positioning using a chain hoist. The process is complex, time-consuming, and carries high safety risks, and is heavily dependent on short maintenance periods.

[0006] In view of this, based on years of experience in production and design in this and related fields, the inventor has designed a dust removal pipeline hoisting method through repeated experiments in order to solve the problems existing in the prior art. Summary of the Invention

[0007] The purpose of this invention is to provide a method for hoisting dust removal pipes, which enables the addition of large-diameter dust removal pipes without affecting normal production and transportation below.

[0008] To achieve the above objectives, the present invention proposes a method for hoisting a dust removal pipeline, wherein the method is used to install a second pipeline between two existing supports below an already operational first pipeline. The method includes:

[0009] A first lifting lug and a second lifting lug are provided at intervals along the circumferential direction of the outer wall of the second pipe, and pipe supports are installed at both ends of the second pipe respectively;

[0010] Connect the first lifting lug to the first crane, and operate the first crane to lift the second pipe to the preset installation elevation position;

[0011] Operate the first crane to horizontally insert one end of the second pipe into one of the existing supports;

[0012] The lifting rope of the second crane is routed around the side of the first pipe away from the second pipe and connected to the second lifting lug. By controlling the lifting of the second crane and coordinating with the lowering of the first crane rope, the second pipe is driven to rotate and swing around a swing axis in its length direction until the second pipe rotates to be directly below the first pipe.

[0013] The first crane and the second crane work together to insert the other end of the second pipe into another existing support, and to place the pipe supports at both ends of the second pipe onto the two existing supports.

[0014] Compared with the prior art, the present invention has the following features and advantages:

[0015] The dust removal pipeline hoisting method proposed in this invention drives the rotation of the second pipeline by precisely controlling the coordinated actions of the first and second cranes, so that the second pipeline is automatically swung under the first pipeline. This replaces the existing technology that requires workers to manually pull and adjust the pipeline using chain hoists at high altitudes or dangerous locations. This reduces the number of construction steps for hoisting the second pipeline, saves the hoisting time, and greatly reduces the construction cost and investment cost of hoisting the second pipeline.

[0016] The dust removal pipeline hoisting method proposed in this invention does not affect the owner's transportation and production below the first pipeline during construction, reducing the cost of measures; at the same time, since there is no need to add a chain hoist for manual pulling, it reduces safety hazards and reduces damage to the pipeline paint. Attached Figure Description

[0017] The accompanying drawings described herein are for illustrative purposes only and are not intended to limit the scope of the invention in any way. Furthermore, the shapes and proportions of the components in the drawings are merely illustrative to aid in understanding the invention and do not specifically limit the shapes and proportions of the components. Those skilled in the art, guided by the teachings of this invention, can select various possible shapes and proportions to implement the invention according to specific circumstances.

[0018] Figure 1 This is a schematic diagram of the hoisting of the dust removal pipe in this invention;

[0019] Figure 2 This is a schematic diagram of the rotation during the second pipe hoisting in this invention;

[0020] Figure 3 This is a top view of the second pipe being rotated during hoisting in this invention;

[0021] Figure 4 This is a schematic diagram illustrating the cooperation between the first crane and the second crane in this invention;

[0022] Figure 5 This is a schematic diagram (a) of the hoisting process of the second pipeline in this invention;

[0023] Figure 6 This is a schematic diagram (II) of the hoisting process of the second pipeline in this invention;

[0024] Figure 7 This is a schematic diagram of the installation of the buffer hook in this invention;

[0025] Figure 8 This is a schematic diagram of the installation of the first and second lifting lugs in this invention.

[0026] Explanation of reference numerals in the attached figures

[0027] 100. First crane; 200. Second crane; 300. First pipeline; 400. Second pipeline; 410. First lifting lug; 420. Second lifting lug; 430. Pipe support; 440. Softening rope; 500. First existing support; 500'. Second existing support; 600. Railway line; 700. Steelmaking plant. Detailed Implementation

[0028] The details of the present invention can be more clearly understood by referring to the accompanying drawings and the description of specific embodiments. However, the specific embodiments of the present invention described herein are for illustrative purposes only and should not be construed as limiting the invention in any way. Under the teachings of this invention, those skilled in the art can conceive of any possible modifications based on the invention, and these should all be considered to fall within the scope of the invention.

[0029] like Figures 1 to 8As shown, this invention proposes a method for hoisting a dust removal pipeline. This method is used to install a second pipeline 400 between two existing supports below an already operational first pipeline 300. The two existing supports are a first existing support 500 and a second existing support 500'. The dust removal pipeline hoisting method includes:

[0030] A first lifting lug 410 and a second lifting lug 420 are provided at intervals along the circumferential direction of the outer wall of the second pipe 400, and pipe supports 430 are installed at both ends of the second pipe 400 respectively.

[0031] Connect the first lifting lug 410 to the first crane 100, and operate the first crane 100 to lift the second pipe 400 to the preset installation elevation position;

[0032] Operate the first crane 100 to horizontally insert one end of the second pipe 400 into the first existing support 500;

[0033] The lifting rope of the second crane 200 is passed around the side of the first pipe 300 away from the second pipe 400 and connected to the second lifting lug 420. By controlling the second crane 200 to lift up and the first crane 100 to lower the rope, the second pipe 400 is driven to rotate and swing around a swing axis in its length direction until the second pipe 400 rotates to be directly below the first pipe 300.

[0034] The first crane 100 and the second crane 200 work together to insert the other end of the second pipe 400 into another existing support (i.e., the second existing support 500'), and make the pipe supports 430 at both ends of the second pipe 400 rest on the two existing supports (the first existing support 500 and the second existing support 500').

[0035] The dust removal pipeline hoisting method proposed in this invention drives the second pipeline 400 to rotate by precisely controlling the coordinated action of the first crane 100 and the second crane 200, so that the second pipeline 400 is automatically swung under the first pipeline 300. This replaces the existing operation method that requires workers to manually pull and adjust the pipeline using chain hoists at high altitudes or dangerous locations. This reduces the number of construction steps for hoisting the second pipeline, saves the hoisting period, and greatly saves the construction cost and investment cost of hoisting the second pipeline.

[0036] The dust removal pipeline hoisting method proposed in this invention does not affect the owner's transportation and production 300 meters below the first pipeline during construction, reducing the cost of measures; at the same time, since there is no need to add a chain hoist for manual pulling, it reduces safety hazards and reduces damage to the pipeline paint.

[0037] In an optional embodiment of the present invention, the first lifting lug 410, the second lifting lug 420 and the two pipe supports 430 are respectively welded to the second pipe 400.

[0038] In an optional embodiment of the present invention, the first lifting lug 410 and the second lifting lug 420 are arranged at an angle of 90 degrees to 180 degrees in the circumferential direction of the second pipe 400. With this structure, when the first crane 100, connected to the first lifting lug 410, lifts the second pipe 400, the second pipe 400 is in a horizontal state, the first lifting lug 410 is located at the highest point of the second pipe 400, and the second lifting lug 420 is located on one side of the second pipe 400. When the second crane 200 lifts and the first crane 100 lowers its rope, the second lifting lug 420 moves upward and the first lifting lug 410 descends, allowing the second pipe 400 to rotate around its axis. Furthermore, since the lifting rope connected to the second lifting lug 420 passes around the side of the first pipe 300 away from the second pipe 400, during rotation, the axis of the second pipe 400 gradually moves below the second lifting lug 420, allowing the second pipe 400 to move precisely horizontally below the first pipe 300.

[0039] In an optional embodiment of the present invention, the first lifting lug 410 includes two first sub-lifting lugs spaced apart along the length of the second pipe 400, and the second lifting lug 420 includes two second sub-lifting lugs spaced apart along the length of the second pipe 400.

[0040] In an optional example of this implementation, the centers of symmetry of the two first sub-lifting lugs and the centers of symmetry of the two second sub-lifting lugs are located on the same cross-section of the second pipe 400. With the above structure, the vertical projections of the lifting points of the first crane 100 and the second crane 200 coincide, ensuring that the second pipe 400 remains stable during lifting.

[0041] In an optional embodiment of the present invention, the lifting rope of the first crane 100 and the first lifting lug 410, and the lifting rope of the second crane 200 and the second lifting lug 420 are respectively locked and fixed with retaining rings to ensure connection strength.

[0042] In an optional embodiment of the invention, during the hoisting and rotation of the second pipe 400, at least one slowing rope 440 is connected to the second pipe 400. The slowing rope 440 is pulled by ground personnel or fixed to an anchor point to limit the unintended swinging of the second pipe 400 in the air.

[0043] In an optional embodiment of the present invention, a railway line 600 is provided between two existing supports, and a first crane 100 and a second crane 200 are respectively located on both sides of the railway line 600. The positions of the first crane 100 and the second crane 200 across the railway line 600 do not affect the iron transport production on the railway line 600.

[0044] In one optional example of this implementation, the maximum rated lifting capacity of the first crane 100 is greater than the maximum rated lifting capacity of the second crane 200.

[0045] In one optional example, the first crane 100 has a maximum rated lifting capacity of 300 tons, and the second crane 200 has a maximum rated lifting capacity of 200 tons.

[0046] In an optional example, a first crane 100 is used as the main crane for the operation, and the operating radius of the first crane 100 is larger than that of the second crane 200.

[0047] Preferably, the operating radius of the first crane 100 is no greater than 18m, and the operating radius of the second crane 200 is no greater than 15m.

[0048] In an optional embodiment of the present invention, after the pipe supports 430 at both ends of the second pipe 400 are placed on two existing supports (first existing support 500, second existing support 500'), the pipe supports 430 are welded to the corresponding first existing support 500 (or second existing support 500').

[0049] In an optional embodiment of the present invention, the dust removal pipe is composed of multiple sections of second pipe 400 connected together, and the multiple sections of second pipe 400 are hoisted sequentially by a segmented hoisting method.

[0050] Please refer to Figures 1 to 8 The specific implementation process of the dust removal pipeline hoisting method proposed in this invention will now be described in detail with reference to an embodiment.

[0051] In this embodiment, as Figure 1 As shown, a dust collection duct is planned to be installed outside the steelmaking workshop. The planned installation location is on the south side of the steelmaking plant (section 700). The duct's dimensions are 4020 x 12 mm. The dust collection duct consists of four sections connected sequentially: the first section is 28 meters long and weighs 33.29 tons; the second section is 27 meters long and weighs 32.105 tons; the third section is 27 meters long and weighs 32.105 tons; and the fourth section is 23 meters long and weighs 27.35 tons. The hoisting height for the dust collection duct is 18.7 meters. Each section is formed by splicing two sections of the second pipe (section 400). During hoisting operations, the first crane (section 100) has a maximum rated lifting capacity of 300 tons and a maximum operating radius of 18 meters, while the second crane (section 200) has a maximum rated lifting capacity of 200 tons and a maximum operating radius of 15 meters.

[0052] In this embodiment, the operation process of the first crane 100 and the second crane 200 is as follows:

[0053] Step 1: Connect a lifting rope (steel wire rope) to the second pipe 400. Insert a retaining ring at the first lifting lug 410 to prevent slippage and misalignment when the lifting rope is locked, which would cause the center of gravity to shift. The entire weight of the second pipe 400 is borne by the locked lifting rope.

[0054] Step 2: After securing the ropes at its north side, the first crane 100 lifts the second pipe 400, which takes about 2 hours.

[0055] Step 3: The first crane 100 slowly raises the second pipe 400 to the pipe elevation position, which takes about 1 hour;

[0056] Step 4: After the first crane 100 lifts the second pipe 400 to the pipe elevation position, the first crane 100 slowly inserts one end of the second pipe 400 westward into the first existing support 500 and slowly approaches the first pipe 300. After one end of the second pipe 400 is inserted 2 meters into the first existing support 500, personnel are lifted onto the jacking vehicle, and the lifting rope of the second crane 200 is lowered from the inside of the first pipe 300. The lifting rope of the second crane 200 is then manually connected to the second lifting lug 420. This process takes about 1 hour.

[0057] Step 5: The second crane 200 rises to put force on the second pipe 400, and the first crane 100 lowers the rope. This process is repeated to make the second pipe 400 slowly rotate and swing inward toward the first pipe 300. This process takes 1 hour.

[0058] Step 6: When the second pipe 400 is rotated into position, the first crane 100 and the second crane 200 simultaneously lift it up and slowly move it eastward to the other end of the second pipe 400 to insert the second existing support 500', which takes 1 hour.

[0059] The detailed explanations of the above embodiments are intended only to explain the present invention so as to facilitate a better understanding of the present invention. However, these descriptions should not be construed as limiting the present invention for any reason. In particular, the various features described in different embodiments can be arbitrarily combined with each other to form other embodiments. Unless there is an explicit description to the contrary, these features should be understood to be applicable to any embodiment, and not limited to the described embodiments.

Claims

1. A method for hoisting dust removal pipelines, characterized in that, The dust removal pipe hoisting method is used to install a second pipe between two existing supports below an already operating first pipe. The dust removal pipe hoisting method includes: A first lifting lug and a second lifting lug are provided at intervals along the circumferential direction of the outer wall of the second pipe, and pipe supports are installed at both ends of the second pipe respectively; Connect the first lifting lug to the first crane, and operate the first crane to lift the second pipe to the preset installation elevation position; Operate the first crane to horizontally insert one end of the second pipe into one of the existing supports; The lifting rope of the second crane is routed around the side of the first pipe away from the second pipe and connected to the second lifting lug. By controlling the lifting of the second crane and coordinating with the lowering of the first crane rope, the second pipe is driven to rotate and swing around a swing axis in its length direction until the second pipe rotates to be directly below the first pipe. The first crane and the second crane work together to insert the other end of the second pipe into another existing support, and to place the pipe supports at both ends of the second pipe onto the two existing supports.

2. The dust removal pipeline hoisting method as described in claim 1, characterized in that, The first and second lifting lugs are arranged at an angle of 90 to 180 degrees in the circumferential direction of the second pipe.

3. The dust removal pipeline hoisting method as described in claim 1, characterized in that, The first lifting lug includes two first sub-lifting lugs spaced apart along the length of the second pipe, and the second lifting lug includes two second sub-lifting lugs spaced apart along the length of the second pipe.

4. The dust removal pipeline hoisting method as described in claim 3, characterized in that, The centers of symmetry of the two first sub-lugs and the centers of symmetry of the two second sub-lugs are located on the same cross-section of the second pipe.

5. The dust removal pipeline hoisting method as described in claim 1, characterized in that, The lifting rope of the first crane and the first lifting lug, and the lifting rope of the second crane and the second lifting lug are respectively secured with retaining rings.

6. The dust removal pipeline hoisting method as described in claim 1, characterized in that, During the hoisting and rotation of the second pipe, at least one slowing hook rope is attached to the second pipe. The slowing hook rope is pulled by ground personnel or fixed to an anchor point to limit the unintended swinging of the second pipe in the air.

7. The dust removal pipeline hoisting method as described in claim 1, characterized in that, A railway line is provided between the two existing supports, with the first crane and the second crane located on opposite sides of the railway line.

8. The dust removal pipeline hoisting method as described in claim 7, characterized in that, The maximum rated lifting capacity of the first crane is greater than that of the second crane.

9. The dust removal pipeline hoisting method as described in claim 8, characterized in that, The first crane is used as the main crane for the operation, and the operating radius of the first crane is larger than that of the second crane.

10. The dust removal pipeline hoisting method as described in claim 1, characterized in that, Once the pipe supports at both ends of the second pipe are positioned on the two existing supports, the pipe supports are welded to the corresponding existing supports.

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