Method for splitting upper part and lower part of tower body

Abstract

According to the method for splitting the upper portion and the lower portion of the tower body, the tower body is hoisted to the splitting station and then welded to the abutment to form a whole, then the position of the sealing plate on the inner side of the tower body is determined, the position, corresponding to the sealing plate, of the outer side face of the tower body can be determined, and therefore the cutting area is determined at the position corresponding to the sealing plate; in this way, after the sealing plate is cut in the tower body, the cutting area on the outer side of the tower body is cut, the upper portion and the lower portion of the tower body are separated, and therefore it is guaranteed that the cut upper portion of the tower body can continue to be in butt joint with other lower portions of the tower body for use, and the cutting effect is improved.

Description

Technical Field

[0001] The invention relates to the technical field of cranes, and in particular to a method for splitting the upper and lower parts of a tower body. Background Art

[0002] In construction or on offshore platforms, cranes are a commonly used large-scale mechanical equipment. Cranes can usually be divided into oil cylinder luffing series and wire rope luffing series. The oil cylinder luffing crane mainly includes a tower body, a lifting mechanism, a slewing mechanism and a luffing mechanism. The tower body includes a tower body base plate and a tower body main body fixed on the tower body base plate. The tower body base plate is provided with a flange surface, and the flange surface is provided with a slewing mechanism mounting hole. The tower body main body is a structure composed of a cylinder and a plane. For the processing method of this type of tower body, the Chinese patent number is 201210348883.6, and the announcement date is 2014.08 .06 patent document, which discloses a cylinder luffing crane tower body and a processing method thereof, wherein the tower body includes a tower body shell, one end of the tower body shell is connected to a top cover, the other end of the tower body shell is connected to a large tower body bottom plate, a rotating mounting surface and a plurality of through holes are provided on the large tower body bottom plate, and the tower body also includes: an oil tank chamber shell and a side plate arranged on the top cover, the formed oil tank chamber shell, the side plate, the top cover and the lifting mechanism mounting support are welded together respectively; the formed tower body shell and the large tower body bottom plate are welded together; the plane of the large tower body bottom plate is processed; and the closing welding is performed.

[0003] The above document divides the tower body into two sections and welds them in sections to reduce the impact of subsequent welding on the plane of the large base plate of the tower body. If the verticality of the screw hole cannot meet the assembly requirements, the tower body needs to be replaced, otherwise the tower body cannot be installed on the revolving platform. In this way, the entire tower body needs to be replaced, and it is not possible to replace only the lower part whose bottom cannot meet the assembly requirements. This replacement of the entire tower body causes great waste, and when the tower body is divided into two sections, a cutting operation is performed, and the upper part of the tower body is easily deformed due to heat, which will cause the upper part of the tower body after cutting to be unable to be reliably connected to the lower part of the tower body. Summary of the invention The invention aims to provide a method for splitting the upper and lower parts of a tower body, which can split the tower body into the upper and lower parts, retain the upper part of the tower body, and ensure that the upper part of the tower body is not damaged during cutting.

[0004] To achieve the above purpose, a method for disassembling the upper and lower parts of a tower body comprises the following steps: S1: hoist the pier to the disassembly station, then hoist the tower body above the pier, so that the flange surface of the bottom plate of the lower part of the tower body abuts against the pier, and weld a stop plate between the pier and the lower part of the tower body; S2 determines the position of the sealing plate inside the tower body, then marks the position corresponding to the sealing plate on the outer side of the tower body, and then determines the cutting area of ​​the outer side of the tower body; S3: welding a clamping plate at the lower end of the sealing plate so that the clamping plate and the sealing plate are connected to form an integral body, then determining a cutting end face on the sealing plate, and cutting the sealing plate along the cutting end face so that a root is formed between the cutting end face and the inner side surface of the tower body after the sealing plate is cut, and removing the clamping plate and the sealing plate after cutting; S4 welds a fixing piece on the upper outer side of the tower body above the cutting area, and then performs cutting in the cutting area on the outer side of the tower body; After S5 cutting is completed, the upper part of the tower body is moved upward in the vertical direction by a crane to separate the upper part of the tower body from the lower part of the tower body. Then it is left to stand for a period of time to determine whether the cutting surface of the upper part of the tower body is qualified. Finally, the upper part of the tower body is hoisted to the storage station to remove the fixings, and the upper and lower parts of the tower body are split.

[0005] The above arrangement, by welding the tower body and the pier into one body, facilitates the stably fixing of the lower part of the tower body on the pier, and prevents shaking when the upper part of the tower body is separated from the lower part of the tower body, which causes the upper part of the tower body to be misaligned; since the position of the sealing plate is fixed, it is necessary to first determine the position of the sealing plate on the inner side of the tower body before the position corresponding to the sealing plate can be determined on the outer side of the tower body, and thus the cutting area can be determined at the position corresponding to the sealing plate, so that after the sealing plate is cut inside the tower body, the cutting area on the outer side of the tower body can be cut to achieve separation of the upper and lower parts of the tower body, and by setting the fixing parts, the upper part of the tower body can be prevented from being deformed during the cutting process, thereby ensuring damage to the upper part of the tower body during cutting and improving the cutting effect.

[0006] Furthermore, the method further comprises step S0: Before lifting the tower body, remove the internal components of the tower body.

[0007] The above arrangement avoids damage to components inside the tower.

[0008] Furthermore, the step S1 also includes: Select two lifting points on the tower body, then fix the wire rope on the lifting points, lift the tower body to the top of the pier by crane, and keep the wire rope in a straight state after the flange surface of the lower base plate of the tower body contacts the pier.

[0009] The above settings ensure better stability during the process of lifting the tower body and avoid large shaking.

[0010] Furthermore, the step S2 also includes S2.1 to S2.4, S2.1 Measure the distance from the upper end face to the lower end face of the sealing plate inside the tower body, and then measure the distance from the lower end face of the sealing plate to the upper end face of the bottom plate at the bottom of the tower body; S2.2 Marking line 1 and marking line 2 are horizontally set on the outer side of the tower body, so that the distance from marking line 1 to the upper end face of the lower bottom plate of the tower body is equal to the distance from the lower end face of the cover plate to the upper end face of the lower bottom plate of the tower body, and the distance from marking line 2 to marking line 1 is equal to the distance from the upper end face of the cover plate to the lower end face; S2.3 Set the center line horizontally between the first and second dimension lines, so that the distance from the first dimension line to the center line is equal to the distance from the second dimension line to the center line. Then, based on the center line, set the third dimension line horizontally within a range from one quarter of the distance from the first dimension line to one half of the distance from the first dimension line to the center line, and set the fourth dimension line horizontally within a range from one quarter of the distance from the second dimension line to one half of the distance from the second dimension line to the center line. S2.4 Determine the area between the marked line 3 and the marked line 4 as the cutting area.

[0011] The above settings determine the marking line by measuring the height of the upper end face and the lower section of the sealing plate from the bottom plate, and then determine the cutting area so that the cutting area is located in the middle position where the sealing plate is connected to the inner side surface for cutting, so that the cutting can be performed from the middle position of the middle sealing plate, and then the position of the sealing plate outside the tower body can be determined, thereby determining the cutting area outside the tower body, which is convenient for subsequent tower body cutting.

[0012] Furthermore, the step S3 also includes: Taking the inner side surface of the tower body as the reference, mark line six is ​​horizontally set at a position 10 mm extending in the direction perpendicular to the inner side surface of the tower body, and the plane passing through mark line six and parallel to the inner side surface of the tower body is determined as the cutting end face.

[0013] The above arrangement determines the cutting surface of the sealing plate on the inner side of the tower body by extending a distance on the inner side of the tower body, so that the sealing plate can be cut to form a root. This can protect the stability of the cutting process while not causing additional problems with the difficulty of cutting. It is easy to determine the position of cutting the sealing plate, so that a root is formed between the sealing plate and the inner side of the tower body after cutting, thereby preventing damage to the inner side of the upper part of the tower body.

[0014] Furthermore, the step S4 also includes: The fixing parts are welded to the outer side of the upper part of the tower body in sequence around the upper part of the tower body, and then the fixing parts are welded between each other so that the fixing parts on the outer side of the upper part of the tower body are integrally fixed to the outer side of the upper part of the tower body, and then a round carbon rod and a flat carbon rod are used in the cutting area of ​​the outer side of the tower body to carry out carbon planing cutting around the tower body clockwise.

[0015] The above arrangement facilitates firstly cutting the depth from the outer side surface to the inner side surface of the tower body by means of a round carbon rod, and then trimming it by means of a flat carbon rod.

[0016] Furthermore, the step S5 also includes S5.1 to S5.2, If S5.1 is qualified, the cut end face of the sealing plate is trimmed by a flat carbon rod, and then the process goes to step S5.2; if it is unqualified, a marking line 5 is horizontally set on the outer surface of the upper part of the tower body within a range of 500~600mm from the carbon planer cutting surface, and carbon planer cutting is performed at the marking line 5, and after cutting, the process goes to step S5.2; S5.2 Taking the carbon planer cutting surface as the reference, a groove is opened outward at the carbon planer cutting end of the upper part of the tower body, so that the groove slope is inclined to the carbon planer cutting surface, and the inclination angle between the groove slope and the carbon planer cutting surface is 40°~60°.

[0017] The above arrangement can remove the unqualified carbon planer cutting ends of the upper tower body after the splitting, and by opening a groove, it is convenient to connect the upper tower body with other lower tower bodies, so as to realize the recycling of the upper tower body and save costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is the work flow chart of the present invention.

[0019] Figure 2 It is the front view of the present invention.

[0020] Figure 3 It is a side view of the present invention.

[0021] Figure 4 It is a schematic diagram of the sealing plate connected to the inner side of the tower body in the present invention.

[0022] Figure 5 It is a schematic diagram of removing the carbon planer cutting end portion of the upper part of the tower body in the present invention.

[0023] Figure 6 It is a schematic diagram of the bevel opening on the upper part of the tower body in the present invention.

[0024] Figure 7 It is a schematic diagram of marking the cutting area on the outer side of the tower body of the present invention. DETAILED DESCRIPTION

[0025] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] like Figures 1 to 7 As shown, a method for disassembling the upper and lower parts of a tower body, wherein the tower body comprises an upper part of the tower body and a lower part of the tower body, and a sealing plate is arranged at the connection between the upper part of the tower body and the lower part of the tower body, comprising the following specific steps: S0 Before lifting the tower body, remove the internal components of the tower body to avoid damage to the internal components of the tower body.

[0027] S1 uses a crane to lift the pier 1 to the splitting station, then selects two lifting points on the tower body and fixes the wire rope on the lifting points, and pulls the wire rope by the crane to lift the tower body to the top of the pier 1 in an upright state, so that the flange surface of the bottom plate 21 of the lower part 2 of the tower body abuts against the pier 1. After the flange surface of the bottom plate 21 of the lower part 2 of the tower body abuts against the pier 1, the crane is controlled to make the wire rope in a straight state, and then more than two stop plates 3 are welded between the pier 1 and the lower part 2 of the tower body. In this embodiment, four stop plates 3 are set, and the four stop plates 3 are welded on the outer side of the lower part 2 of the tower body in a circular distribution, so that the lower part 2 of the tower body is stably fixed and connected to the pier 1.

[0028] S2 determines the position of the sealing plate 4 on the inner side of the tower body, then marks the position corresponding to the sealing plate 4 on the outer side surface 31 of the tower body, and then determines the cutting area 5 on the outer side surface 31 of the tower body, including S2.1~S2.4, S2.1 Measure the distance from the upper end surface 41 to the lower end surface 42 of the sealing plate 4 in the tower body, and then measure the distance from the lower end surface 42 of the sealing plate to the upper end surface 211 of the bottom plate 21 of the lower part 2 of the tower body; S2.2 horizontally set the marking line 11 and the marking line 2 12 on the outer side surface 31 of the tower body, so that the distance from the marking line 11 in the direction perpendicular to the bottom plate 21 of the lower part 2 of the tower body to the upper end surface 211 of the bottom plate 21 of the lower part 2 of the tower body is equal to the distance from the lower end surface 42 of the sealing plate 4 to the upper end surface 211 of the bottom plate 21 of the lower part 2 of the tower body, and the distance from the marking line 2 12 in the direction perpendicular to the bottom plate 21 of the lower part 2 of the tower body to the marking line 11 is equal to the distance from the upper end surface 41 to the lower end surface 42 of the sealing plate 4; S2.3 The center line 5 is horizontally arranged between the marked line 1 11 and the marked line 2 12, so that the vertical distance from the marked line 1 11 to the center line 5 is equal to the vertical distance from the marked line 2 12 to the center line 5, and then the marked line 3 13 is horizontally arranged within a range from one quarter of the distance from the marked line 1 11 to the center line 5 to one half of the distance from the marked line 1 11 to the center line 5, and the marked line 4 14 is horizontally arranged within a range from one quarter of the distance from the marked line 2 12 to the center line 5 to one half of the distance from the marked line 2 12 to the center line 5. In this embodiment, the marked line 1 11, the marked line 2 12, the marked line 3 13, the marked line 4 14 and the center line 5 on the same outer side surface 31 of the upper part of the tower body are arranged parallel to each other; S2.4 determines that the area between marking line three 13 and marking line four 14 is the cutting area 33. In this embodiment, the distance from marking line three 13 to center line 5 is equal to one quarter of the distance from marking line one 11 to center line 5, and the distance from marking line four 14 to center line 5 is equal to one quarter of the distance from marking line two 12 to center line 5.

[0029] S3 welds a clamping plate 6 at the lower end of the sealing plate 4 so that the clamping plate 6 is connected to the sealing plate 4 to form a whole, which supports the sealing plate 4, and then determines the cutting end face 43 on the sealing plate 4. In this embodiment, taking the inner side surface 32 of the tower body as a reference, a marking line six (not marked in the figure) is horizontally set at a position extending 10 mm in the direction perpendicular to the inner side surface 32 of the tower body, and the plane passing through the marking line six and parallel to the inner side surface 32 of the tower body is determined as the cutting end face 43, and gas cutting is performed along the cutting end face 43, so that after the sealing plate 4 is cut, a root 7 is formed between the cutting end face 43 and the inner side surface 32 of the tower body, that is, the thickness of the root 7 is 10 mm, which can effectively prevent the inner side surface 32 of the upper part 8 of the tower body from being damaged during the gas cutting process, and the clamping plate 6 and the sealing plate 4 are removed after cutting.

[0030] S4 welds a fixing part 9 on the outer side surface 31 of the upper tower body 8 above the cutting area. In the present embodiment, the fixing part 9 is an annular structure, and the fixing part 9 is located 20 mm above the cutting area. The fixing part 9 is welded to the outer side surface 31 of the upper tower body 8 in sequence around the upper tower body 8, and then the fixing parts 9 are welded to each other so that the fixing part 9 on the outer side surface 31 of the upper tower body 8 is integrally fixed to the outer side surface 31 of the upper tower body 8, and then a round carbon rod and a flat carbon rod are used in the cutting area of ​​the outer side surface 31 of the tower body to carry out carbon planing cutting around the tower body clockwise. The wind pressure range of the round carbon rod and the flat carbon rod is 0.4-0.6MPa, and the current range is 400-450A. The fixing part 9 is a channel steel.

[0031] After the cutting is completed in step S5, the upper part 8 of the tower body is moved upward in the vertical direction by the crane to separate the upper part 8 from the lower part 2 of the tower body, and then it is left to stand for a period of time, and the carbon planing cutting surface 81 of the upper part 8 of the tower body is observed to be qualified, and then the steps S5.1 to S5.2 are entered, and finally the upper part 8 of the tower body is hoisted to the storage station to remove the fixing part 9, and the upper and lower parts of the tower body are split. If the result is qualified, the cut end face 43 of the sealing plate is trimmed by a flat carbon rod, and then the process proceeds to step S5.2. If the result is unqualified, a marking line 5 15 is horizontally set on the outer side face 31 of the upper part 8 of the tower body within a range of 500-600 mm from the carbon planer cutting face 81. In this embodiment, the vertical distance between the marking line 5 15 and the carbon planer cutting face 81 is 600 mm, and carbon planer cutting is performed at the marking line 5 15, and then the process proceeds to step S5.2. S5.2 Taking the carbon planer cutting surface 81 as a reference, a groove 10 is opened outward at the carbon planer cutting end of the upper tower body 8, so that the groove inclined surface 111 and the carbon planer cutting surface 81 are inclined, and the inclination angle between the groove inclined surface 111 and the carbon planer cutting surface 81 is 40°~60°. In this embodiment, the inclination angle a between the groove inclined surface 111 and the carbon planer cutting surface 81 is 45°. By opening the groove 10, it is convenient to connect the upper tower body 8 with other lower tower bodies, realize the recycling of the upper tower body 8, and save costs.

[0032] The working principle of the present invention is as follows: after the tower body is hoisted to the disassembly station, it is welded to the pier 1 to form a whole, and then the position of the sealing plate 4 on the inner side of the tower body is determined, and then the position corresponding to the sealing plate 4 can be determined on the outer side of the tower body, so as to determine the cutting area at the position corresponding to the sealing plate 4, and the tower body is cut along the vertical direction to form a root to ensure that the inside of the tower body is not damaged during cutting, and then the upper and lower parts of the tower body are cut along the determined cutting area, so that after the sealing plate is cut inside the tower body, the cutting area outside the tower body is then cut to achieve separation of the upper and lower parts of the tower body, thereby ensuring that the upper part of the tower body after cutting can continue to be docked with other lower parts of the tower body for use.

Claims

1. A method for disassembling the upper and lower parts of a tower, characterized in that: The following steps are involved: S1: hoist the pier to the disassembly station, then hoist the tower body above the pier, so that the flange surface of the bottom plate of the lower part of the tower body abuts against the pier, and weld a stop plate between the pier and the lower part of the tower body; S2 determines the position of the sealing plate inside the tower body, and then marks the position corresponding to the sealing plate on the outer side of the tower body, thereby determining the cutting area on the outer side of the tower body; S3: welding a clamping plate at the lower end of the sealing plate so that the clamping plate and the sealing plate are connected to form an integral body, then determining a cutting end face on the sealing plate, and cutting the sealing plate along the cutting end face so that a root is formed between the cutting end face and the inner side surface of the tower body after the sealing plate is cut, and removing the clamping plate and the sealing plate after cutting; S4 welds a fixing piece on the upper outer side of the tower body above the cutting area, and then performs cutting in the cutting area on the outer side of the tower body; After S5 cutting is completed, the upper part of the tower body is moved upward in the vertical direction by a crane to separate the upper part of the tower body from the lower part of the tower body. Then it is left to stand for a period of time to determine whether the cutting surface of the upper part of the tower body is qualified. Finally, the upper part of the tower body is hoisted to the storage station to remove the fixings, and the upper and lower parts of the tower body are split.

2. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: It also includes step S0: Before lifting the tower body, remove the internal components of the tower body.

3. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: The step S1 also includes: Select two lifting points on the tower body, then fix the wire rope on the lifting points, lift the tower body to the top of the pier by crane, and keep the wire rope in a straight state after the flange surface of the lower base plate of the tower body contacts the pier.

4. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: The step S2 also includes S2.1 to S2.4, S2.1 Measure the distance from the upper end face to the lower end face of the sealing plate inside the tower body, and then measure the distance from the lower end face of the sealing plate to the upper end face of the bottom plate at the bottom of the tower body; S2.2 Marking line 1 and marking line 2 are horizontally set on the outer side of the tower body, so that the distance from marking line 1 to the upper end face of the lower bottom plate of the tower body is equal to the distance from the lower end face of the cover plate to the upper end face of the lower bottom plate of the tower body, and the distance from marking line 2 to marking line 1 is equal to the distance from the upper end face of the cover plate to the lower end face; S2.3 Set the center line horizontally between the first and second dimension lines, so that the distance from the first dimension line to the center line is equal to the distance from the second dimension line to the center line. Then, based on the center line, set the third dimension line horizontally within a range from one quarter of the distance from the first dimension line to one half of the distance from the first dimension line to the center line, and set the fourth dimension line horizontally within a range from one quarter of the distance from the second dimension line to one half of the distance from the second dimension line to the center line. S2.4 Determine the area between the marked line 3 and the marked line 4 as the cutting area.

5. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: The step S3 also includes: Taking the inner side surface of the tower body as the reference, mark line six is ​​horizontally set at a position 10 mm extending in the direction perpendicular to the inner side surface of the tower body, and the plane passing through mark line six and parallel to the inner side surface of the tower body is determined as the cutting end face.

6. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: The step S4 also includes: The fixing parts are welded to the outer side of the upper part of the tower body in sequence around the upper part of the tower body, and then the fixing parts are welded between each other so that the fixing parts on the outer side of the upper part of the tower body are integrally fixed to the outer side of the upper part of the tower body, and then a round carbon rod and a flat carbon rod are used in the cutting area of ​​the outer side of the tower body to carry out carbon planing cutting around the tower body clockwise.

7. A method for disassembling the upper and lower parts of a tower body according to claim 1, characterized in that: The step S5 also includes S5.1 to S5.2, If S5.1 is qualified, the cut end face of the sealing plate is trimmed by a flat carbon rod, and then the process goes to step S5.2; if it is unqualified, a marking line 5 is horizontally set on the outer surface of the upper part of the tower body within a range of 500~600mm from the carbon planer cutting surface, and carbon planer cutting is performed at the marking line 5, and after cutting, the process goes to step S5.2; S5.2 Taking the carbon planer cutting surface as the reference, a groove is opened outward at the carbon planer cutting end of the upper part of the tower body, so that the groove slope is inclined to the carbon planer cutting surface, and the inclination angle between the groove slope and the carbon planer cutting surface is 40°~60°.

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