Construction platform device, girth welding system and girth welding method

Abstract

The invention provides a construction platform device, a girth welding system and a girth welding method. The construction platform device comprises a limiting unit, a supporting unit and a platform unit. Wherein each supporting unit is of a U-shaped semi-surrounding structure with three open faces, and the two open faces are oppositely arranged to form a through space structure; the supporting structure comprises an upper arm, a side arm and a lower arm; upper and lower ends of the side arm are respectively connected with the upper arm and the lower arm; the platform unit is laid on the lower arm of the supporting unit, connected with the lower arm and used for containing constructors to conduct construction operation. The upper arm is longer than the lower arm and the platform unit; the length of the limiting unit is not less than that of the upper arm exceeding the lower arm and the platform unit; the limiting unit is fixedly connected with the end, away from the side arm, of the upper arm and used for hooking the edge of the furnace shell so as to hang and fix the construction platform device. The construction platform device is easy to install, free of welding, easy to disassemble and not prone to generating adverse effects on the furnace shell, and the safety and operability of the construction platform device are improved.

Description

Technical Field

[0001] The invention belongs to the technical field of internal and external ring welding of blast furnaces and hot blast stoves, and particularly relates to a construction platform device, a ring welding system and a ring welding method. Background Art

[0002] In the construction of blast furnace and hot blast stove body structures, the furnace shell is usually decomposed into several strips, then welded into rings on a working platform, and finally hoisted to the upper furnace shell of the blast furnace by a crane for ring welding; but as the height of the furnace body increases, the ring welding operation becomes more and more dangerous, and the welding quality cannot be well guaranteed.

[0003] During the traditional blast furnace and hot blast furnace ring welding construction process, it is necessary to set up construction platforms inside and outside the furnace. However, due to the complex construction conditions of the furnace body, there is a lot of cross-construction, and the center of the furnace body must be calibrated after each furnace shell construction, which greatly hinders other processes and is not easy to disassemble. After each furnace shell construction is completed, the construction platform needs to be moved upwards, the process is complicated and inefficient.

[0004] In addition, the traditional construction platform is complicated to manufacture and needs to be welded on the original furnace shell, which has an adverse effect on the performance of the furnace shell. Moreover, the protection of the construction platform generally uses a safety rope, which has poor safety performance and is not smooth for operators.

[0005] Therefore, it is urgent to design a construction platform that is simple to set up, has no adverse effects on the performance of the furnace shell and is highly safe. Summary of the invention

[0006] The present invention provides a construction platform device, a ring welding system and a ring welding method, which are used to solve the problems in the prior art of complicated construction process of the construction platform, difficult disassembly, easy to have adverse effects on the performance of the furnace shell and low construction safety during the construction of the furnace body structure of the blast furnace and the hot blast stove.

[0007] In the first aspect, the present invention provides a construction platform device, comprising a limiting unit, a supporting unit and a platform unit; wherein the supporting unit has a U-shaped semi-enclosed structure with three sides open, wherein the two open sides are arranged opposite to each other to form a through space structure; the supporting structure comprises an upper arm, a side arm and a lower arm; the upper and lower ends of the side arm are respectively connected to the upper arm and the lower arm; the platform unit is laid on the lower arm of the supporting unit and connected to the lower arm, for accommodating construction personnel to perform construction operations; the length of the upper arm is greater than that of the lower arm and the platform unit; the length of the limiting unit is not less than the length of the upper arm exceeding the lower arm and the platform unit; the limiting unit is fixedly connected to one end of the upper arm away from the side arm, for hooking the edge of the furnace shell to suspend and fix the construction platform device.

[0008] Compared with the prior art, the advantages of the present invention are as follows: the construction platform device is suspended and fixed by hooking the edge of the furnace shell through the limiting unit, which simplifies the erection process of the construction platform device and reduces the difficulty of lifting. No welding is required for installation, which is not easy to have adverse effects on the furnace shell and reduces the difficulty of installation, and is easy to disassemble; through the U-shaped semi-enclosed structure with three sides open of the support unit, the platform unit is laid on the lower arm of the support unit, which improves the safety and operability of the construction platform device.

[0009] Further, the limiting unit includes limiting teeth; The top of the limiting tooth is fixedly connected to the bottom of the upper arm; The limiting teeth include more than two tooth pieces, each tooth piece is arranged at intervals, and the interval between two adjacent tooth pieces matches the thickness of the furnace shell.

[0010] Further, the platform unit includes a platform plate and a movable plate; The platform plate is laid on the lower arm of the supporting unit and is connected with the lower arm. The movable plate is located below the platform plate and is movably connected with the platform plate.

[0011] Furthermore, a first fixing rod is fixedly connected to the bottom of the platform plate, a second fixing rod is fixedly connected to the bottom of the movable plate, and the first fixing rod and the second fixing rod are movably connected via bolts.

[0012] Further, the bolt holes of the first fixing rod and / or the second fixing rod are not less than 16 mm; and / or, The length of the platform plate parallel to the through-space structure is 1.5~1.8m; and / or, The length of the movable plate parallel to the through-space structure is 300~500mm.

[0013] Further, the upper arm, the side arm and the lower arm of the support unit respectively include a force-bearing rod.

[0014] Furthermore, the support unit also includes a reinforcement rod, and two ends of the reinforcement rod are respectively connected to the stress-bearing rod of the upper arm and the stress-bearing rod of the lower arm.

[0015] Furthermore, it also includes: a guardrail and a skirting board; the guardrail and the skirting board are respectively connected to the platform unit parallel to at least one side of the through-space structure.

[0016] In a second aspect, the present invention provides a ring welding system, comprising no less than two construction platform devices of the first aspect, wherein the platform units of the construction platform devices are in contact with each other so that the construction platform devices are enclosed in a ring corresponding to the outer diameter or inner diameter of the furnace shell.

[0017] In a third aspect, the present invention provides a ring welding method, which is performed using the ring welding system of the second aspect. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of a construction platform device in one embodiment of the present invention; Figure 2 It is a partial schematic diagram of a construction platform device in one embodiment of the present invention; Figure 3 is a schematic diagram of a ring welding system (external ring welding) in one embodiment of the present invention; Figure 4 Schematic diagram of a ring welding system (internal ring welding) in one embodiment of the present invention.

[0019] Description of reference numerals: 1. Limiting teeth; 2. Reinforcement rod; 31. Upper arm; 32. Side arm; 33. Lower arm; 4. Guardrail; 51. Platform plate; 52. Movable plate; 6. Skirting board; 7. Rotating shaft; 81. Bolt; 82. Bolt hole; 91. First fixing rod; 92. Second fixing rod. DETAILED DESCRIPTION

[0020] In order to make the purpose, technical solutions and advantages of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in combination with the embodiments of the present invention. Obviously, the described embodiments are 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 creative work are within the scope of protection of the present invention.

[0021] See also Figure 1 , Figure 2 In the first aspect, the present invention provides a construction platform device, including a limiting unit, a supporting unit and a platform unit; wherein the supporting unit has a U-shaped semi-enclosed structure with three sides open, wherein the two open sides are arranged opposite to each other to form a through space structure; the supporting structure includes an upper arm 31, a side arm 32 and a lower arm 33; the upper and lower ends of the side arm 32 are respectively connected to the upper arm 31 and the lower arm 33; the platform unit is laid on the lower arm 33 of the supporting unit and connected to the lower arm 33, for accommodating construction personnel to perform construction operations; the length of the upper arm 31 is greater than the lower arm 33 and the platform unit; the length of the limiting unit is not less than the length of the upper arm 31 exceeding the lower arm 33 and the platform unit; the limiting unit is fixedly connected to one end of the upper arm 31 away from the side arm 32, for hooking the edge of the furnace shell to suspend and fix the construction platform device.

[0022] The construction platform device provided by the present invention is hung and fixed by hooking the edge of the furnace shell through a limiting unit, and the vertical and wide-through spatial structure lengths of the upper arm 31 are greater than the lower arm 33 and the platform unit, so that the limiting unit can be just hooked on the furnace shell, which simplifies the erection process of the construction platform device and reduces the difficulty of lifting. No welding is required for installation, which is not easy to have adverse effects on the furnace shell and reduces the difficulty of installation, and is easy to disassemble; through the U-shaped semi-enclosed structure with three sides of the support unit open, the platform unit is laid on the lower arm 33 of the support unit, which improves the safety and operability of the construction platform device.

[0023] Optionally, the limiting unit includes a limiting tooth 1; the top of the limiting tooth 1 is fixedly connected to the bottom of the upper arm 31; the limiting tooth 1 includes more than two tooth plates, each tooth plate is arranged at intervals, and the distance between two adjacent tooth plates matches the thickness of the furnace shell.

[0024] Furthermore, the platform unit includes a platform plate 51 and a movable plate 52 ; the platform plate 51 is laid on the lower arm 33 of the support unit and connected to the lower arm 33 , and the movable plate 52 is located below the platform plate 51 and movably connected to the platform plate 51 .

[0025] The present invention does not limit the way in which the platform plate 51 and the movable plate 52 are movably connected, and both rotation and pulling can be achieved; it is more conducive to multiple construction platform devices being enclosed by the movable plate 52 to form a closed operating platform; through the movably connected platform plate 51 and the movable plate 52, the area of ​​the platform unit that can accommodate construction personnel is larger and can be adjusted, further reducing the difficulty of installation.

[0026] Specifically, a first fixing rod 91 is fixedly connected to the bottom of the platform plate 51 , a second fixing rod 92 is fixedly connected to the bottom of the movable plate 52 , and the first fixing rod 91 and the second fixing rod 92 are movably connected via a bolt 81 and a rotating shaft 7 .

[0027] In a specific implementation, the bolt hole 82 of the first fixing rod 91 and / or the second fixing rod 92 is not less than 16 mm.

[0028] The length of the platform plate 51 parallel to the through-space structure is 1.5-1.8 m; the length of the movable plate 52 parallel to the through-space structure is 300-500 mm.

[0029] By limiting the length of the bolt hole 82 , it is easier to fix the movable platform to the platform plate 51 after rotation, thereby further increasing the safety and stability of the construction platform device.

[0030] Optionally, the platform plate 51 and the movable plate 52 are made of galvanized steel, and the number of the first fixing rod 91 and the number of the second fixing rod 92 are both two.

[0031] Furthermore, the platform plate 51 is a U-shaped platform plate 51, which is made of galvanized patterned plate.

[0032] The upper arm 31, the side arm 32 and the lower arm 33 of the support unit respectively include a force-bearing rod. In a specific embodiment, the upper arm 31, the side arm 32 and the lower arm 33 of the support unit respectively include two force-bearing rods.

[0033] Optionally, the stress-bearing rod is a thick-walled galvanized square steel pipe.

[0034] The support unit further includes a reinforcing rod 2 , both ends of which are connected to the force-bearing rod of the upper arm 31 and the force-bearing rod of the lower arm 33 , respectively.

[0035] In another specific embodiment, the construction platform device further includes: a guardrail 4 and a skirting board 6; the guardrail 4 and the skirting board 6 are respectively connected to at least one side of the platform unit parallel to the through-space structure.

[0036] See also Figure 3 , Figure 4 In a second aspect, the present invention provides a ring welding system, comprising no less than two construction platform devices described in the first aspect, wherein the platform units of each construction platform device are in contact so that each construction platform device is enclosed in a ring corresponding to the outer diameter or inner diameter of the furnace shell.

[0037] The girth welding system provided by the present invention can perform girth welding operations both outside the furnace shell and inside the furnace shell.

[0038] When in use, the ring welding system can be spliced ​​according to the circumference of each belt of the blast furnace and the hot blast furnace; specifically, the operating personnel use a crane to hoist the spliced ​​furnace shell to be welded on the upper furnace shell that has been installed in the blast furnace, and then according to the circumference of the furnace shell to be welded, first splice the construction platform device in the construction site, tighten the bolts, and then directly hoist the spliced ​​and fixed ring welding platform as a whole to the furnace shell that has just been installed and not yet welded, and then the construction personnel can use auxiliary equipment such as ladders to enter the operating platform for welding operations; or according to the circumference of the furnace shell to be welded, first hoist each construction platform device to the furnace shell that has just been installed and not yet welded, and then use auxiliary equipment such as ladders to rotate and pull out the movable plate of the construction platform device, so that the platform unit is enclosed into a closed ring, and then the bolts are tightened, and then the construction personnel enter the ring welding system to perform welding operations.

[0039] In a third aspect, the present invention further provides a ring welding method, which is performed using the ring welding system of the second aspect.

[0040] The ring welding method provided by the present invention has a simple ring welding system, is highly safe, is not likely to have adverse effects on the furnace shell, is simple and convenient to assemble and disassemble, has high construction efficiency, and has good promotion prospects.

[0041] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein by equivalents. If these modifications and variations fall within the scope of the claims of the present invention and their equivalent technologies, they should be considered to be within the protection scope of the present invention.

Claims

1. A construction platform device, characterized in that: It includes a limit unit, a support unit and a platform unit; The support unit has a U-shaped semi-enclosed structure with three sides open, wherein the two open sides are arranged opposite to each other to form a through space structure; the support structure includes an upper arm, a side arm and a lower arm; the upper and lower ends of the side arm are respectively connected to the upper arm and the lower arm; The platform unit is laid on the lower arm of the support unit and connected to the lower arm, and is used to accommodate construction workers to perform construction operations; The length of the upper arm is greater than that of the lower arm and the platform unit; the length of the limit unit is not less than the length of the upper arm beyond the lower arm and the platform unit; The limiting unit is fixedly connected to one end of the upper arm away from the side arm, and is used for hooking the edge of the furnace shell to suspend and fix the construction platform device.

2. The construction platform device according to claim 1, characterized in that: The limiting unit includes limiting teeth; The top of the limiting tooth is fixedly connected to the bottom of the upper arm; The limiting teeth include more than two tooth pieces, each tooth piece is arranged at intervals, and the interval between two adjacent tooth pieces matches the thickness of the furnace shell.

3. The construction platform device according to claim 1, characterized in that: The platform unit includes a platform plate and a movable plate; The platform plate is laid on the lower arm of the supporting unit and is connected with the lower arm. The movable plate is located below the platform plate and is movably connected with the platform plate.

4. The construction platform device according to claim 3, characterized in that: The bottom of the platform plate is fixedly connected with a first fixing rod, the bottom of the movable plate is fixedly connected with a second fixing rod, and the first fixing rod and the second fixing rod are movably connected via bolts.

5. The construction platform device according to claim 4, characterized in that: The bolt holes of the first fixing rod and / or the second fixing rod are not less than 16 mm; and / or, The length of the platform plate parallel to the through-space structure is 1.5~1.8m; and / or, The length of the movable plate parallel to the through-space structure is 300~500mm.

6. The construction platform device according to any one of claims 1 to 5, characterized in that: The upper arm, the side arm and the lower arm of the support unit respectively include a load-bearing rod.

7. The construction platform device according to claim 6, characterized in that: The supporting unit also includes a reinforcing rod, two ends of which are respectively connected to the stress-bearing rod of the upper arm and the stress-bearing rod of the lower arm.

8. The construction platform device according to claim 6, characterized in that: Also includes: Guardrail and skirting board; the guardrail and skirting board are respectively connected to the platform unit parallel to at least one side of the through-space structure.

9. A ring welding system, characterized in that: It comprises at least two construction platform devices according to any one of claims 1 to 8, wherein the platform units of the construction platform devices are in contact with each other so that the construction platform devices are enclosed in a ring shape corresponding to the outer diameter or inner diameter of the furnace shell.

10. A ring welding method, characterized in that: The ring welding system according to claim 9 is used for the process.

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