Exterior racking construction divided sheet metal parts assembly instruction diagram, and combination of divided sheet metal parts created and assembled according to assembly instruction diagram

Abstract

To provide an assembly instruction diagram for increasing the working accuracy of an exterior racking construction and reducing the working hours to reduce a construction period, and a technique to combine divided sheet metal parts processed and assembled according to the instruction diagram.SOLUTION: The assembly instruction diagram is a combination of exterior racking construction divided sheet metal parts assembly instruction diagram for dividing the entirety of a reaction vessel to be protected that is created on the basis of a design drawing of the vessel into assembly parts and indicating the order of the assembly, and various divided sheet metal parts, the assembly instruction diagram is created on the basis of the design drawing data of the vessel to be protected, various sheet metal parts necessary for the exterior of the entire vessel are divided into common standard sheet metal parts and processing sheet metal parts, and the order of assembly and positions are instructed. The divided sheet metal parts are created in advance according to a divided sheet metal parts processing diagram created on the basis of the assembly instruction diagram, and the standard sheet metal parts and various processing sheet metal parts are assembled on site on the basis of the assembly instruction diagram to carry out exterior racking construction.SELECTED DRAWING: Figure 9

Description

[Technical Field]

[0001] The present invention relates to an assembly instruction drawing for divided sheet metal parts for use in the construction of exterior racking for a vessel such as a large reactor, and a combination of the assembly instruction drawing and divided sheet metal parts that are created and assembled based on the drawing. [Background technology]

[0002] Exterior racking work generally refers not only to exterior sheet metal work for insulating pipes, but also to work to lay insulation on the outer walls of large tanks and other structures, and then cover the exterior with metal plates. Unlike pipe protection, exterior racking work for large tanks involves coating the outer walls of the container with calcium silicate or similar material, and then assembling roughly rectangular sheet metal parts to cover the exterior. The separate sheet metal parts are fabricated on-site and assembled together for construction. The installation of the container pipes, brackets, and other components is primarily performed on-site, relying on the skilled techniques and intuition of workers, who measure the components, transfer the measurements to the sheet metal parts, process them, and then fit them together to form the structure. Therefore, although there have been proposals for improving the materials and joints of the exterior racking work (Patent Document 1), the work is performed based on the skilled techniques and intuition of on-site workers, and the finished product and construction period are currently dependent on the skill level of the workers. Consequently, the on-site measurement, sheet metal transfer, and dimensional adjustments can be time-consuming, resulting in significant work time. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Patent Publication No. 2019-27555 Summary of the Invention [Problem to be solved by the invention]

[0004] Therefore, in this exterior racking work, it is desirable to have an improved technique that allows assembly work to be carried out without relying as much as possible on the skilled techniques and intuition of workers, and that also increases the accuracy of the racking work while at the same time shortening the work time and shortening the construction period. Therefore, the object of the present invention is to provide an assembly instruction drawing for divided sheet metal parts to shorten the construction period, and a combination of the divided sheet metal parts created based on the assembly instruction drawing. [Means for solving the problem]

[0005] The inventors have conducted extensive research in light of the fact that the processing work of measuring to match the piping etc. on site and transferring the sheet metal dimensions requires skill, making the work complicated, and that it takes time to adjust for any deviations in the accuracy of the on-site processing. Therefore, since the design and manufacture of the reaction vessel is often completed before exterior racking work can be carried out, a divided sheet metal part assembly work plan is made in advance based on the design drawings of this reaction vessel, the entire vessel is divided into assembly parts based on this plan, the assembly order is determined, and a divided sheet metal instruction drawing and a divided sheet metal part processing drawing based on this drawing are created, and the divided sheet metal parts are processed in advance based on the processing drawing. This makes it possible to carry out exterior racking work on site by assembling these divided sheet metal parts based on the assembly instruction drawing, and it has also been found that the work time on site, i.e., the construction period, can be shortened more than expected.

[0006] The present invention relates, firstly, to an assembly instruction drawing for exterior racking (sheet metal) work that is attached to the exterior of a container such as a large reactor for the purpose of keeping it warm or cold, and, secondly, to a combination of the assembly instruction drawing and various divided sheet metal parts that are created in accordance with the assembly instruction drawing. In other words, the assembly instruction drawing according to the present invention is A) created based on the design drawing data of the protected container, and divides the various sheet metal parts required for the exterior of the entire container into common standard sheet metal parts and processed sheet metal parts that require processing, such as a first part for processing the piping cutouts and a second part for processing the bracket cutouts, and indicates the assembly order and position of these parts.It is also a processing instruction drawing that is created when creating the above-mentioned standard sheet metal parts and processed sheet metal parts in accordance with the assembly instruction drawing. Next, the divided sheet metal parts according to the present invention are parts that are A) pre-made in a factory based on a processing instruction drawing that is created from the assembly instruction drawing, taking into consideration joints and processing parts, and are assembled on-site based on the assembly instruction drawing, B) It consists of common standard sheet metal parts and processed sheet metal parts that require processing, such as a first part having a piping notch or its notch mark and a second part having a bracket notch or its notch mark, C) The standard sheet metal parts and the various processed sheet metal parts are assembled on-site based on the assembly instruction drawings, and exterior racking work is carried out. [Effects of the Invention]

[0007] According to the assembly instruction drawing of the present invention, processing instructions can be created based on the design drawing of the container to be protected, taking into account standard joints and processing parts, making it possible to pre-fabricate divided sheet metal parts in the factory. Meanwhile, because the divided sheet metal parts are created based on the assembly instruction drawing, they can be assembled on-site without error. Therefore, the assembly instruction drawing is important not only as an assembly instruction for the site but also as a processing drawing for processing the divided sheet metal parts in the factory. Meanwhile, according to the assembly instruction drawing and divided sheet metal parts of the present invention, the complicated process of creating divided sheet metal parts based on the design drawing on-site, which can lead to reduced finish accuracy and longer construction time due to incorrect work, can be avoided. Therefore, the divided sheet metal parts pre-fabricated in the factory can be assembled based on the assembly instruction drawing, resulting in excellent work accuracy and work efficiency, and shortening the construction time for exterior racking. In particular, in the past, on-site measurement and sheet metal processing involving sheet metal transfer required expertise, but according to the present invention, various part assembly instruction drawings are created based on the design drawings of the protected container, and then processing drawings for the divided sheet metal parts are created based on these.Therefore, the divided sheet metal parts can be cut out, bent, and provided as an assembly set in a factory equipped with processing equipment such as an NCN laser cutting machine, so the processing work does not require expertise.

[0008] Furthermore, in the present invention, the standard sheet metal parts are divided into predetermined sections, preferably multiples of 4, based on the outer periphery dimensions of the container, while the various processed sheet metal parts are made using standard sheet metal parts, so that part assembly does not become complicated. Also, the processed sheet metal parts may be processed using equally divided standard sheet metal parts, but if they are processed as nozzle-divided parts in which a pair of adjacent parts form one nozzle hole, fine adjustment during assembly makes on-site alignment easy. [Brief explanation of the drawings]

[0009] [Figure 1A] FIG. 1 is a plan view of the ceiling of a reactor to which exterior racking is applied in accordance with the present invention. [Figure 1B] FIG. 1B is a side view of the reactor with exterior racking of FIG. 1A. [Figure 2] FIG. 1 is a perspective view of the exterior of a reaction vessel to which exterior racking work has been applied. [Figure 3A] This is a part assembly instruction diagram for assigning the top-section divided sheet metal parts shown in Figure 1A using nozzle assignment. [Figure 3B] This is a part assembly instruction diagram for equally dividing the top section divided sheet metal parts in Figure 1A. [Figure 4] FIG. 1C is a side view showing the attachment of divided sheet metal parts to the entire body of the reaction vessel of FIG. 1B. [Figure 5] FIG. 5 is an assembly instruction diagram showing the entire body of FIG. 4 in an expanded state, illustrating the assembly order and positions. [Figure 6] This is an exploded view (a) of the sheet metal cutting process for the top plate part of the present invention, a back view (b) of the top plate part made by bending the left side edge and periphery of the cut sheet metal, and a back plan view (c) showing the combination of the top plate part with adjacent parts. [Figure 7A] 1A is a development view of the sheet metal cutting process for the upper body part of the present invention, and FIG. 1D is a plan view of the back side of the completed upper part that is processed by bending the cut sheet metal. [Figure 7B] 7B is an explanatory diagram of the first processing step (c) and the second processing step (b) from cutting out (a) to completion (d) in FIG. 7A. FIG. [Figure 8]1A is a developed view for cutting out the sheet metal of the intermediate body part of the present invention, FIG. 1B is an explanatory diagram for bending the cut-out sheet metal, and FIG. 1C is a plan view of the back side of the completed intermediate sheet metal part. [Figure 9] 1A is a developed view for cutting out the sheet metal of the lower body part of the present invention, FIG. 1B is an explanatory view for bending the cut-out sheet metal, and FIG. 1C is a plan view of the back side of the completed lower body sheet metal part. [Figure 10A] FIG. 1 is an explanatory diagram of a program for creating an assembly instruction drawing (development drawing) from a design drawing according to the present invention. [Figure 10B] FIG. 10B is a development diagram created by the program of FIG. 10A. DETAILED DESCRIPTION OF THE INVENTION

[0010] The present invention comprises a combination of various sheet metal parts 10, 20, 30, and 40 and an assembly instruction diagram 50. As shown in FIG. 3A or 3B, the top plate sheet metal part 10 is made up of a plurality of top plate divided sheet metal parts 11 (see FIG. 6). As shown in FIGS. 4 and 5, the body is made up of an upper sheet metal part 20, a middle sheet metal part 30, and a lower sheet metal part 40. The upper body part 20 is made up of a plurality of upper divided sheet metal parts 21 (see FIG. 7), the middle body part 30 is made up of a plurality of middle divided sheet metal parts 31 (see FIG. 8), and the lower body part 40 is made up of a plurality of lower divided sheet metal parts 41 (see FIG. 9). When these various sheet metal parts 10, 20, 30, and 40 are assembled, the reaction vessel 100 of FIGS. 1A and 1B is provided with exterior racking and takes the form shown in FIG. 2.

[0011] The present invention is a combination for exterior racking (sheet metal) construction that is attached to the exterior of a vessel such as a large reactor for heat and cold insulation, and is carried out as follows. (1) Based on the design drawings or design data of the reaction vessel to be protected, the part division and assembly sequence are determined according to the vessel dimensions and the positions of the mounting members, and racking assembly instructions for the site (Fig. 3A or B and Fig. 5) are created. As shown in Fig. 1A, reaction vessel 100 has various pipes, such as large pipe 111, medium pipe 112, small pipe 113, and smallest pipe 114, in upper part 110, and as shown in Fig. 1B, large pipe 121, medium pipe 122, small pipe 123, bracket 124, nameplate 125, and scaffolding attachment 126 are attached to body 120, so the necessary processing is performed in advance at the factory on divided sheet metal parts 10, 20, 30, and 40. (2) The parts are divided into common standard sheet metal parts and processed sheet metal parts that are processed according to the installation of piping, brackets, etc. (3) The standard sheet metal parts are divided into the top plate and the upper, middle, and lower parts of the body, and part cutouts are created to separate each part. (4) The processed sheet metal parts are machined by marking or cutting the processed parts according to the positions of the mounting members such as pipes and brackets, with or without using standard sheet metal parts. Marking the lines makes it easy to make fine adjustments on site. (5) The standard sheet metal parts and processed sheet metal parts are assembled on site based on the racking assembly instruction drawings to carry out exterior racking work.

[0012] (Creating assembly instructions from design drawings) The reactor design drawings of Figures 1A and 1B are divided into the top plate 10 and the body sections 20, 30, and 40, and the part assembly instruction drawings of Figures 3A or 3B and 5 are created. This procedure can be performed using a computer as follows, and the processing procedure can be configured as follows. (Processing procedure) Design drawing → Input of design data → Data analysis → Decide on division method (equal division or nozzle division) → Decide on division data → Create assembly instruction diagram → Create processing diagram for each divided sheet metal part → Cutting process → Bending process → Completion of divided sheet metal parts Specifically, the design data is read from the blueprint, and data analysis is performed taking into account the overall size, piping size and position, bracket position, etc., and the top plate 10 is determined to be either a nozzle-split type (Fig. 3A) or an equal-split type (Fig. 3B). The division data is then calculated, and a top plate assembly instruction diagram consisting of the appropriately divided sheet metal parts and a body assembly instruction diagram for the divided sheet metal parts in which the body is divided into an upper section 20, a middle section 30, and a lower section 4 are created. While this can be done manually, by inputting the blueprint data on the top plate size, height, nozzle size, and position, as well as the appropriate division size and whether the nozzle-split type or equal-split type is selected, a computer can calculate the top plate assembly instruction diagram (Fig. 3A or B) and the body assembly instruction diagram (Fig. 4 or 5) to create the appropriate assembly instruction diagram. Figures 10A and 10B show examples of body assembly instruction diagrams. Figure 10A is an example of a drawing program, and Figure 10B is a development diagram created by the program in Figure 10A. Image data is imported from the design drawing, and the reactor vessel's (A) diameter of 3,200 mm, (B) distance (height) from the upper WL to the lower WL of 3,324 mm, (C) insulation thickness of 96 mm, (D) distance from the upper WL to the body end of 424.5 mm, and (E) distance from the lower WL to the body end of 424.5 mm are entered. The outline of the insulation case is then drawn on the outside of the reactor vessel. On the other hand, excluding the top and bottom plates, the body is divided into five parts, top and bottom, based on the dimensions of (B) and taking into account the coil width. The following are entered: (W) upper body 840 mm, (M) first intermediate section 662 mm, (H) second intermediate section 662 mm, (G) third space section 840 mm, and (F) lower body 840 mm. The reactor vessel division number (Ka) is set to 12. The development diagram shown in Figure 10B is then created. While it is preferable to divide the circumferential direction in multiples of four, the number of divisions and division length are determined depending on whether the division is equal or nozzle-divided. In Figure 3B, the sheet metal parts are divided into 12 equal parts at 30 degrees, and the specified nozzle processing is performed. Therefore, the large pipes 110 and nozzle holes for each pipe are processed in the 12 divided sheet metal parts 11-(1) to 11-(12). On the other hand, in Figure 3A, the pipe nozzles are divided into two parts taking into account the pipe position, and the remaining parts are divided so that there are more standard sheet metal parts. In the height direction, the middle section 30 is usually divided equally, except for the upper body section 10 and the lower body section 40.The upper body portion 10 is divided into two sections, upper and lower, and is composed of a lower section part 10-1 with the upper end cut off and an upper section part 10-2 with a hanging hook. The lower body portion 40 is formed slightly higher than the middle section 30, and the nozzle is divided into two sections, and mounting parts for the nozzle holes of the large diameter pipe 121, medium size pipe 122 and small size pipe 123, bracket 124, nameplate 125 and ladder 26 are formed.

[0013] (Creating a machining drawing for a divided sheet metal part from an assembly instruction drawing) Once the main parts 10a, 20a, 30a, and 40a of each divided sheet metal part are determined in the assembly instruction drawing, the supplementary parts that form the necessary parts for joining around them are calculated, and cutting drawings (Fig. 6(a), Fig. 7(a), Fig. 8(a), Fig. 9(a)) for each divided sheet metal part 10, 20, 30, and 40, which will be described later, are created, and the necessary bending and cutting are performed. Excluding the joints, it is recommended to use an area of ​​1m square ±20% as a standard, which is appropriate for the assembly work.

[0014] (Creating split sheet metal parts from split sheet metal part processing drawings) Once the cutting process drawings (Figures 6(a), 7(a), 8(a), and 9(a)) are obtained, a template can be created and cut manually based on this, but it is also possible to use a processing machine such as a CNC laser automatic cutting machine to computer-control the cutting of various divided sheet metal parts from the coil material based on the cutting process instruction drawings. The details are as follows.

[0015] (Creating split sheet metal parts for the top panel) If the top plate of the standard sheet metal part is circular, it is divided circumferentially into a fan shape with a rounded apex, forming joints 12 with adjacent parts on both left and right edges, while forming joints 13 with the upper end of the upper body part (described later) at the outer circumferential edge. Specifically, as shown in FIG. 6, the divided sheet metal parts 11 of the top plate 10 are cut out into a part cutout having a fan-shaped part main portion 11a with a 30-degree angle, dividing 360 degrees into 12 parts, and a folding edge at its left end with an inner folding line 11b and an outer folding line 11c, and a folding edge with a folding line 11d that folds up to the outer periphery (FIG. 6(a)). This is folded along folding lines 11b and 11c into the shape shown in FIG. 6(b), forming folding joints 12 and rising joints 13. When these are combined at the left and right edges, adjacent divided sheet metal parts 11, 11 are combined via joints 12, resulting in the joined state shown in FIG. 6(c).

[0016] (Creating the divided sheet metal parts for the torso) The body of the standard sheet metal part is preferably divided into an upper part 20, multiple middle parts 30, and a lower part 40 according to the height of the container (see Figure 5), with the division being made so that there are many common middle standard sheet metal parts 30. On the other hand, it is divided in the circumferential direction according to the apex angle division angle shown in Figure 3A or B. The upper body part 20 has an end 22 at its upper end that engages with the joint of the outer circumferential edge 13 of the top plate divided sheet metal part 11.

[0017] (Creating the upper body split sheet metal parts) As shown in Fig. 7A, the upper body part 20 is composed of a plurality of divided sheet metal parts 21 cut out from a coil material and processed. Each divided sheet metal part 21 is cut out from the coil material so as to surround a central main part 21a and have a bent edge 21b on the upper side that forms a receiving portion 22 that receives the insertion 13 of the end of the top plate divided sheet metal part 11, a bent edge 21c on the left side that forms a left joint 23, a bent edge 21d on the right side that forms a right joint 25, and a bent edge 21e on the lower side that forms a lower joint 24. These bent edges are bent to form the respective joints 22, 23, 24, and 25, and are finally finished into the completed shape shown in Fig. 7A(d). That is, as shown in Figure 7B, (1) the upper joint 22 is formed by folding the cut-out folded edge 21b inside along the inside fold line 22a, (2) then folding it up along the outside fold line 22b to form the joint 22 with an N-shaped cross section (see Figure 7B(e)). (3) The left joint 23 is formed by folding the folded edge 21c inside along the inside fold line 23a, while (4) the right joint 25 is formed by folding the folded edge 21d inward on the front side along the inside fold line 25a. (5) The lower joint 24 is formed by folding the folded edge 21e upward along the inside fold line 24a, and (6) then folding it down outward along the outside fold line 24b.

[0018] (Forming the divided sheet metal parts for the middle section of the body) Next, as shown in FIG. 8, the intermediate torso section 30 is composed of multiple divided sheet metal parts 31 cut from coil material and processed. As shown in FIG. 8(A), each divided sheet metal part 31 is cut from the coil material and is formed so as to surround the central main section 31a, with an insertion piece 31b on the upper side for the lower joint 24 of the upper torso section part, a bent edge 31c on the left side forming the left joint 32, a bent edge 31e on the right side forming the right joint 33, and a bent edge 31d on the lower side forming the lower joint 34. These bent edges are bent to form the respective joints 32, 33, and 34, and finally, the completed shape shown in FIG. 8(c) is obtained. That is, as shown in FIG. 8(b), (1) the left joint 32 is formed by folding the bent edge 31c back along the inner back fold line 32a. On the other hand, (2) the right joint 33 is formed by folding the bent edge 31e inward on the front side along the inner fold line 33a. The lower joint 34 is formed by (3) first folding the folded edge 31d upward along the inner folding line 34a, and then (4) folding it down outward along the outer folding line 34b.

[0019] (Creating the lower body split sheet metal parts) Finally, as shown in FIG. 9, the lower body section 40 is composed of multiple divided sheet metal parts 41 cut from coil material and processed. Each divided sheet metal part 41 is cut from the coil material and is formed so as to surround a central main portion 41a, with an upper insertion piece 41b for insertion into the lower joint 34 of the intermediate body part, a bent edge 41c on the left side forming the left joint 42, a bent edge 41d on the right side forming the right joint 43, and a bent edge 41e on the lower side forming the lower joint 44. These bent edges are bent to form the joints 42, 43, and 44, resulting in the final finished shape shown in FIG. 9(c). That is, as shown in FIG. 9(b), (1) the left joint 42 is formed by folding the bent edge 41b back along the inner fold line 42a. On the other hand, (2) the right joint 43 is formed by folding the bent edge 41d inward on the front side along the inner fold line 43a. The lower joint 44 is formed by (3) first folding the folded edge 41e upward along the inner fold line 44a, and then (4) folding it outward along the outer fold line 44b (note that the lower part of the body is formed in the same way as the joint of the upper top plate when the lower top plate is attached, in the drawing, the folded edge is folded inward and then folded outward, and the end of the flat plate is inserted into the V-shaped part of the cross-section that is folded inwards and then folded outwards).

[0020] (Assembly of split sheet metal parts) The above-mentioned divided sheet metal parts are assembled from the lower body section 20 to the middle section 30 and upper section 10, and finally the top plate 10 is assembled according to Figure 3A or Figure 3B. When the exterior racking work is performed, the outer wall racking of the reaction vessel shown in Figures 1A and 1B can be applied, resulting in the appearance shown in Figure 2.

[0021] The present invention has been described above based on representative examples, but it relates to creating assembly instruction drawings for each divided sheet metal part based on the design drawings of the protected container, and then pre-processing each divided sheet metal part in a factory based on these drawings and assembling them on site to form a combination for exterior racking work.As long as assembly instruction drawings for each divided sheet metal part are created and used and the divided sheet metal parts are used in combination, this falls within the technical scope of the present invention, and those skilled in the art can easily make modifications and changes without departing from the gist of the present invention.

Claims

1. A) An assembly instruction diagram for divided sheet metal parts for exterior racking work that is created by importing a design drawing of the container to be protected and inputting basic design drawing data, B) forming an exterior casing line on the container's outer outline taking into account the insulation thickness, and then dividing at least the body in the circumferential and vertical directions, and dividing each divided part into a common standard sheet metal part and a processed sheet metal part that requires processing such as a first part for processing piping cutouts and a second part for processing bracket cutouts, and is an exploded view showing the assembly position and assembly order, and C) capable of creating a divided sheet metal part processing instruction diagram to be used to cut out and process the above-mentioned standard sheet metal parts and processed sheet metal parts.

2. Assembly instruction diagram for divided sheet metal parts for exterior racking work according to claim 1, wherein the division format is a nozzle division that divides at the nozzle position or an equal division.

3. It consists of a combination of various separate sheet metal parts for exterior racking (sheet metal) work that is attached to the exterior of a large reactor or other container to keep it warm or cold, and assembly instructions for those parts. A) The assembly instruction drawing is created based on the design drawing of the container to be protected, and divides various sheet metal parts into common standard sheet metal parts and processed sheet metal parts that require processing, such as a first part for processing a piping notch and a second part for processing a bracket notch, and indicates the assembly order and position of the parts, B) The divided sheet metal parts are made up of common standard sheet metal parts that are prepared in advance in a factory in accordance with a processing instruction drawing that is prepared based on the assembly instruction drawing, and processed sheet metal parts that require processing, such as a first part having a piping notch or a notch mark and a second part having a bracket notch or a notch mark, C) A combination for exterior racking, characterized in that the standard sheet metal parts and the various processed sheet metal parts can be assembled on site based on the assembly instruction drawing, and exterior racking construction can be carried out.

4. The combination for exterior racking construction according to claim 2, wherein the standard sheet metal parts are divided into multiples of 4 based on the outer periphery dimensions of the container, and are 1 m square ±20% excluding joints.

5. 3. The exterior racking construction assembly according to claim 2, wherein the various processed sheet metal parts are made using standard sheet metal parts.

6. 6. The combination for exterior racking construction according to claim 3, wherein the processed sheet metal parts are processed as nozzle split parts, each of which forms one nozzle hole with a pair of adjacent parts.

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