Flue construction system for confined space

Abstract

The utility model discloses a flue construction system for a limited space, which comprises a flue assembly support built on a set position basic plane, and further comprises an overhanging transfer platform protruding out of a flue assembly layer, and the overhanging transfer platform is located near the front 1 / 3 position of the full length of the flue assembly support; the walking platform is arranged along the full length of the flue assembly support, and the top surface of the walking platform is flush with the top surface of the cantilever transfer platform; comprising a walking mechanism driven to walk on a walking platform, the walking platform is provided with a track used for specifying the walking route of the walking mechanism, and the walking mechanism is guided by the track to walk in the set direction; comprising hoisting equipment I used for hoisting a flue from a preset position to a cantilever transfer platform, hoisting equipment II used for hoisting the flue from the cantilever transfer platform to a walking mechanism, and hoisting equipment III used for hoisting the flue from the walking mechanism to a flue assembly layer; on the premise that the construction cost is controlled, the flue can be efficiently and stably installed and constructed.

Description

Technical Field

[0001] This utility model relates to the field of installing and constructing flues in confined spaces, and specifically to a flue construction system for confined spaces. Background Technology

[0002] In the construction of sintering projects, the installation of the sintering flue in the sintering chamber is a key and difficult point in the project because the pipe diameter is relatively large, the pipe wall is relatively thin, and the installation space is narrow and limited, so conventional hoisting machinery installation methods cannot be used.

[0003] If the existing sliding installation method in the industry is adopted, one option is to install rails on the top frame beam of the existing assembly support, but this requires a large investment in measures and steel plate pre-embedding, resulting in high construction costs. The other option is to first install the flue support, and then use angle steel slide rails and a winch to slide and transport the large flue. However, dragging the large flue will generate strong friction with the angle steel, causing paint peeling and structural damage to the flue body, as well as noise. Furthermore, the winch is difficult to fine-tune and control, and the pulling is greatly affected by external forces, posing a construction safety hazard.

[0004] Therefore, to solve the above problems, a flue construction system for confined spaces is needed that can efficiently and stably complete the installation of flues while controlling construction costs. Utility Model Content

[0005] In view of this, the purpose of this utility model is to overcome the defects in the prior art and provide a flue construction system for confined spaces, which can efficiently and stably complete the installation of flues while controlling construction costs.

[0006] The present invention discloses a flue construction system for confined spaces, comprising a support subsystem, a hoisting subsystem, and a travel subsystem;

[0007] The support subsystem includes a flue assembly bracket built on a base surface at a set location. The flue assembly bracket has an ash hopper assembly layer located on top of the base surface, a flue assembly layer located on top of the ash hopper assembly layer, and a flue hoisting layer located on top of the flue assembly layer.

[0008] The support subsystem also includes a cantilevered transfer platform that protrudes outward from the flue assembly layer, and a walking platform that runs along the entire length of the flue assembly support. The walking platform has a fixed support that connects to the ash hopper assembly layer, and the top surface of the walking platform is flush with the top surface of the cantilevered transfer platform.

[0009] The walking subsystem includes a walking mechanism driven to walk on a walking platform, the walking platform having a track for defining the walking route of the walking mechanism, the walking mechanism being guided by the track to walk in a predetermined direction;

[0010] The hoisting subsystem includes hoisting equipment I for hoisting the flue from a preset position to the cantilevered transfer platform, hoisting equipment II for hoisting the flue from the cantilevered transfer platform to the traveling mechanism, and hoisting equipment III for hoisting the flue from the traveling mechanism to the flue assembly layer. Hoisting equipment I is a truck crane, and hoisting equipment II and hoisting equipment III are both crane hoists.

[0011] Furthermore, the cantilevered transfer platform is located near the front 1 / 3 of the length of the flue assembly support;

[0012] The cantilevered transfer platform includes a cantilevered transfer platform body, which extends along the length of the flue assembly support perpendicular to the flue and is welded and fixed to the frame beam that forms the flue assembly layer.

[0013] Furthermore, the inner end of the cantilevered transfer platform body is assembled with the flue assembly layer through a fastening structure wrapped around one of the frame beams.

[0014] The outer end of the cantilevered transfer platform is assembled with the ash hopper assembly layer via diagonal bracing beams.

[0015] Furthermore, the traveling mechanism has a rail lock for cooperating with the track to limit the traveling mechanism to a set position.

[0016] Furthermore, the walking mechanism is equipped with an anti-collision protection device.

[0017] Examples include limit switches, travel switches, and proximity switches, which are used to limit the range of motion of a traveling mechanism. Alternatively, there are composite anti-collision protection devices combining traditional mechanical collision limiters or photoelectric sensors, which will not be elaborated upon here. In this solution, the anti-collision protection device includes an infrared anti-collision limit switch and a laser travel limit reflector.

[0018] There are several laser travel limit reflectors, each set at the beginning and end of the track. The number of infrared anti-collision limit switches corresponds one-to-one with the number of laser travel limit reflectors, and each is set on the traveling mechanism.

[0019] Furthermore, the traveling mechanism has a bearing surface for supporting the chimney; after the chimney is mounted on the traveling mechanism, the axis of the chimney is parallel to the traveling direction of the traveling mechanism;

[0020] The bearing surface is provided with a number of flue support brackets, and the flue support brackets are arranged in pairs along the flue axis to support the flue. Several sets of flue support brackets are arranged along the flue axis.

[0021] Several sets of flue support brackets are evenly distributed from the center of the bearing surface to both ends of the flue axis.

[0022] Furthermore, the flue support bracket has an arc facing the chimney.

[0023] This solution also discloses a flue installation method based on the aforementioned flue construction system for confined spaces, comprising the following construction steps:

[0024] S1. Based on the span dimensions of the flue assembly support, divide and obtain several flue segments;

[0025] S2. Construct a cantilevered transfer platform and a walking platform on the assembly bracket;

[0026] S3. Obtain the walking mechanism;

[0027] S4. Transport the several flue sections obtained in step S1 to the construction site;

[0028] S5. Hoist the first flue section to the cantilever transfer platform using hoisting equipment I according to the preset assembly sequence;

[0029] The flue segment has hoisting nodes, which include a top hoisting node located on the top surface of the flue segment and a side hoisting node located on the side of the flue segment. The side hoisting node includes two symmetrical about the axis of the flue segment. Every two side hoisting nodes and one top hoisting node on the same circumference of the flue segment form a group of hoisting points. The flue segment is provided with multiple groups of hoisting points, and the multiple groups of hoisting points are symmetrical about the middle of the length direction of the flue segment.

[0030] S6. The flue section is hoisted from the cantilevered transfer platform to the traveling mechanism using hoisting equipment II;

[0031] The hoisting equipment II consists of several hoisting points corresponding to the number of hoisting points on the flue section, and each hoisting equipment II is set on the flue assembly bracket.

[0032] S6a. Before hoisting the flue section from the cantilever transfer platform to the traveling mechanism using hoisting equipment II, each of the hoisting points is connected to hoisting equipment II respectively;

[0033] S6b. The flue section is hoisted from the cantilevered transfer platform to the top of the flue assembly layer using hoisting equipment II;

[0034] S6c. Raise the flue section to a set position higher than the top edge of the traveling mechanism; the flue section is 0.2m to 0.3m higher than the top edge of the traveling mechanism;

[0035] S6d. Drive the traveling mechanism to move to the bottom of the flue section;

[0036] S6e. Move the flue section to the traveling mechanism;

[0037] S7. Remove hoisting equipment II, drive the traveling mechanism to transport the flue section to the preset position of the flue assembly layer, and set hoisting equipment III near the preset position of the flue assembly layer;

[0038] S8. The flue section is hoisted from the traveling mechanism to the preset position on the flue assembly layer using hoisting equipment III;

[0039] The hoisting equipment III consists of several hoisting points corresponding to the number of hoisting points on the flue section, and each hoisting equipment III is set on the flue assembly bracket;

[0040] S8a. Connect each of the aforementioned lifting points to the corresponding lifting equipment III;

[0041] S8b. Raise the flue section to a set position above the top edge of the traveling mechanism; the flue section is 0.2m to 0.3m above the top edge of the traveling mechanism;

[0042] S8c. The flue section is hoisted from the traveling mechanism to the top of the pre-set position of the flue assembly layer using hoisting equipment III;

[0043] S8d. Drive the traveling mechanism to move out to the bottom of the flue section;

[0044] S9. Repeat steps S5 to S8 to transport the second flue section to its preset position in the flue assembly layer.

[0045] The first flue section and the second flue section are close together, and the hoisting equipment III consists of several groups corresponding to the number of flue sections, so that adjacent flue sections are close together;

[0046] S10. Weld adjacent flue sections; adjust the hoisting equipment Ⅲ of the corresponding flue section to make the adjacent flue sections meet the preset welding standards;

[0047] S11. Remove the walking platform at the bottom of the adjacent flue section after welding;

[0048] S12. Weld the flue section support to the flue section;

[0049] S12a. In the area where the walking platform is removed from the flue assembly layer, the flue segment support is welded to the flue assembly layer at the bottom of the corresponding position of the flue segment in this area.

[0050] S12b. Adjust the hoisting equipment Ⅲ of the corresponding flue section so that the flue section after butt welding in this area is lowered onto the flue section support;

[0051] S12c. Weld the flue section to the flue section support and remove the corresponding hoisting equipment Ⅲ;

[0052] S13. An ash hopper is installed at the bottom of the flue section equipped with the flue section support obtained in step 12;

[0053] S14. Repeat steps S9 to S13, and assemble the flue section, flue section support and ash hopper in the predetermined order;

[0054] S15. Flue closure; the flue segment located on the cantilevered transfer platform is the final flue segment;

[0055] S15a. Before constructing the last flue section, remove the traveling mechanism located on the traveling platform;

[0056] S15b. Use hoisting equipment I to hoist the last flue section to the cantilevered transfer platform;

[0057] S15c. The last flue section is hoisted from the cantilevered transfer platform to the top of the flue assembly layer using hoisting equipment II;

[0058] S15d. Weld the last flue section to the flue sections located on both sides thereon;

[0059] S15e. Remove the walking platform and cantilevered transfer platform at the bottom of the last flue section;

[0060] S15f. Assemble the ash hopper to the bottom of the last flue section; remove the hoisting equipment II.

[0061] The beneficial effects of this utility model are: the flue construction system for confined spaces disclosed in this utility model effectively solves the problem of transporting and installing large flues in confined spaces, is easy to operate, significantly improves work efficiency, saves manpower, materials and equipment investment compared with traditional hoisting, and has a good protective effect on finished products. Attached Figure Description

[0062] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0063] Figure 1 This is a structural schematic diagram of the construction of the first flue section of this utility model;

[0064] Figure 2 This is a schematic diagram of the structure of the flue section of this utility model being transported on a traveling platform via a traveling mechanism;

[0065] Figure 3 This is a schematic diagram of the structure of the walking platform of this utility model;

[0066] Figure 4 This is a schematic diagram of the walking mechanism of this utility model;

[0067] Figure 5 This is a schematic diagram of the structural treatment of the track position nodes of the walking platform and cantilever platform of this utility model;

[0068] Figure 6 This is a schematic diagram of the structure of the flue section of this utility model installed at a designated position by hoisting equipment III;

[0069] Figure 7 This utility model Figure 6 Front view structural diagram;

[0070] Figure 8 This utility model Figure 6 Enlarged structural diagram at point A;

[0071] Figure 9 This is a structural schematic diagram of the flue segment hoisted one by one according to this utility model;

[0072] Figure 10 This is a schematic diagram of the structure of adjacent flue sections of this utility model being close together;

[0073] Figure 11 This is a schematic diagram of the flue closure structure of this utility model. Detailed Implementation

[0074] Figures 1 to 11 As shown in the figure, the flue construction system for confined spaces in this embodiment includes a support subsystem, a hoisting subsystem, and a walking subsystem.

[0075] like Figure 1 and Figure 11 As shown, the support subsystem includes a flue assembly bracket erected on a foundation surface at a designated location. The flue assembly bracket has an ash hopper assembly layer 1 located at the top of the foundation surface, a flue assembly layer 2 located at the top of the ash hopper assembly layer 1, and a flue hoisting layer 3 located at the top of the flue assembly layer 2. The flue assembly bracket includes vertically arranged frame columns and horizontally arranged frame beams, as well as concrete platforms poured on the corresponding ash hopper assembly layer 1 and flue hoisting layer 3. The ash hopper assembly layer 1 is used for ash hopper assembly construction, the flue assembly layer 2 is used to support flue segments, and the flue hoisting layer 3 is used to hoist flue segments, providing a construction site for workers within a limited space and assisting in the assembly construction of flue segments.

[0076] In this embodiment, as Figures 1-3 As shown, the support subsystem also includes a cantilevered transfer platform 4 that protrudes outward from the flue assembly layer 2. The cantilevered transfer platform 4 is located near the front 1 / 3 of the length of the flue assembly support; more specifically, it is located in the third bay on the front side; in order to facilitate the stable assembly of the flue segments and prevent uneven stress during construction and flue assembly.

[0077] The cantilevered transfer platform 4 includes a cantilevered transfer platform body, which extends along the length of the flue assembly support perpendicular to the flue assembly support and is welded and fixed to the frame beam forming the flue assembly layer 2. Specifically, the inner end of the cantilevered transfer platform body is assembled with the flue assembly layer 2 through a fastening structure wrapped around one of the frame beams. The fastening structure includes clamps 5, and multiple sets of clamps 5 are arranged along the width direction of the cantilevered transfer platform 4 to improve assembly reliability, increase structural strength, and reduce defects such as warping or cracking caused by the weight of the cantilevered position that affect the construction. The outer end of the cantilevered transfer platform body is assembled with the ash hopper assembly layer 1 through diagonal bracing beams 6. The diagonal bracing beams 6 are several arranged along the width direction of the cantilevered transfer platform 4, and the diagonal bracing beams 6 and the cantilevered transfer platform 4 form a triangular support structure, which is conducive to improving the load-bearing capacity.

[0078] In this embodiment, as Figure 1 , Figure 2 and Figure 5 As shown, the support subsystem also includes a traveling platform 7 that runs along the entire length of the flue assembly bracket. The traveling platform 7 has a fixed bracket 8 connected to the ash hopper assembly layer 1. The fixed bracket 8 is parallel to the vertical direction, and its top end is welded to the traveling platform 7. The bottom end of the fixed bracket 8 is welded to a steel plate pre-embedded in the ash hopper assembly layer 1. Several fixed brackets 8 are clustered at the bottom of the traveling platform 7, resulting in higher structural strength. During subsequent dismantling, they can be cut along their roots; further details are omitted here. The traveling platform 7 also extends through the cantilevered transfer platform 4, and the top surface of the traveling platform 7 is flush with the top surface of the cantilevered transfer platform 4. The traveling platform 7 has a track 9, such as... Figure 5 The walking platform 7 and the cantilever platform are designed with node treatment structures at the position of track 9. The cantilever transfer platform 4 is slotted at the laying position of track 9 to make track 9 continuous, which is conducive to the travel of the walking mechanism 11.

[0079] In this embodiment, as Figures 1-4 As shown, the walking subsystem includes a walking mechanism 11 driven to walk on a walking platform 7. The walking platform 7 has a track 9 for defining the walking route of the walking mechanism 11. More specifically, the track 9 includes two parallel tracks arranged along the entire length of the walking platform 7. The walking mechanism 11 is guided by the track 9 to walk in a predetermined direction. The walking mechanism 11 can be a wheeled walking vehicle, a tracked walking vehicle, etc. In this solution, the walking mechanism 11 is a tracked walking vehicle, which is more compatible with the track 9 set on the walking platform 7, has better walking capacity and load-bearing capacity, higher transportation efficiency for flue sections, and more stable transportation. The tracked walking vehicle includes active walking steel wheels, passive walking steel wheels, and a drive motor that drives the active walking steel wheels, etc., which will not be described in detail here.

[0080] In this embodiment, the traveling mechanism 11 has a rail lock 10 for cooperating with the track 9 to limit the traveling mechanism 11 to a set position. The rail lock 10 can be selected from any type suitable for this solution and is located near the drive steel wheel to improve braking capability and facilitate positioning the traveling mechanism 11 at the set position.

[0081] In this embodiment, the traveling mechanism 11 is also equipped with an anti-collision protection device to improve the transportation safety of the traveling mechanism 11; such as limit switches, limit switches, and proximity switches, etc., used to limit the movement range of the traveling mechanism 11. Alternatively, a composite anti-collision protection device combining traditional mechanical collision limiters or photoelectric sensors may be used, which will not be described in detail here. In this solution, the anti-collision protection device includes an infrared anti-collision limit switch 12 and a laser travel limit reflector 13; there are several laser travel limit reflectors, each respectively set at the beginning and end of the track 9. The number of infrared anti-collision limit switches corresponds one-to-one with the number of laser travel limit reflectors, and each is respectively set on the traveling mechanism 11.

[0082] In this embodiment, the traveling mechanism 11 has a bearing surface for supporting the chimney; more specifically, the bearing surface is the top surface of the platform supported by the active and passive traveling steel wheels of the traveling mechanism 11. After the chimney is set on the traveling mechanism 11, the axis of the chimney is parallel to the traveling direction of the traveling mechanism 11. This helps to ensure the stability and reliability of the chimney segment during transportation. Several flue support brackets 14 are provided on the bearing surface. The flue support brackets 14 have an arc facing the chimney. This arc is approximately the same as the arc of the chimney segment, further improving the support strength, lowering the center of gravity of the flue segment during transportation, and ensuring that the chimney segment does not shift during transportation. Several flue support brackets 14 are arranged in pairs along the axis of the chimney and support the chimney in opposite directions. Several groups of flue support brackets 14 are arranged along the axial direction of the chimney. The several groups of flue support brackets 14 are evenly distributed from the center of the bearing surface to both ends of the flue axis. This scheme uses two sets of 14 flue support brackets, evenly distributed on both sides of the middle of the flue's axial length, to improve the stability of the flue segment on the traveling mechanism 11, thereby improving construction quality and efficiency. To minimize the starting and braking forces during the movement of the traveling mechanism 11, the fixed bracket 8 and the frame beam are welded together with angle steel braces to enhance the overall structural stability. In this embodiment, the hoisting subsystem includes hoisting equipment I 15 for hoisting the flue from a preset position to the cantilevered transfer platform 4, hoisting equipment II for hoisting the flue from the cantilevered transfer platform 4 to the traveling mechanism 11, and hoisting equipment III 16 for hoisting the flue from the traveling mechanism 11 to the flue assembly layer 2. The hoisting equipment I 15 is a truck crane, but it can also be other transport and lifting equipment, such as a tire crane or a tower crane, which will not be described in detail here. Both hoisting equipment II and hoisting equipment III16 are lifting hoists. In this scheme, hoisting equipment II and hoisting equipment III16 have the same structure, and the structure after being grouped together is also the same. Their functions are similar, and only the frequency of use is different, so the names are distinguished. This will not be elaborated further here.

[0083] In this embodiment, as Figure 6 and Figure 8 As shown, taking the structure of one set of hoisting equipment Ⅲ16 as an example, the hoisting equipment group includes two hoists set opposite each other at the bottom of the chimney. The two hoists do not exceed the center of the flue section. The two hoists are set on the frame columns at corresponding positions and connected to the side lifting nodes of the flue section. The center of the chimney section is finely adjusted by the hoists according to the corresponding conditions. The hoisting equipment group also includes a hoist located at the top of the center of the flue section. This hoist plays the role of the main hoist. Therefore, it is supported on the flue hoisting layer 3 by the hoisting bracket. It should be understood that the hoisting bracket can be equipped with multiple hoists to achieve the intended purpose, which will not be elaborated here.

[0084] Lifting holes are made on the beam plate corresponding to the hoist installation on the flue hoisting layer 3. The lifting holes are surrounded by reinforcing beams. The lifting support includes a crossbeam 17 for assembling the hoist, and two columns 18 connected to the flue hoisting layer 3 at both ends of the crossbeam. The two columns and the crossbeam form a portal structure. It also includes a bottom beam 19 connected to the bottom of the columns. The bottom beam, columns and crossbeam are set in three degrees of freedom and are perpendicular to each other, which makes the structure stronger and has better support capacity. Furthermore, a crossbeam stiffening brace 20 is set between the crossbeam and the column, and a column stiffening brace 21 is set between the column and the bottom beam to further ensure the structural strength.

[0085] The total number of the grouped hoisting equipment III16 and the grouped hoisting equipment II is at least consistent with the number of flue segments. The grouped hoisting equipment II is installed on top of the cantilevered transfer platform 4. The remaining hoisting equipment III16 are arranged in a one-to-one correspondence with the flue segments to be installed. This solution also discloses a flue installation method based on the flue construction system for confined spaces, including the following construction steps:

[0086] S1. Based on the span dimensions of the flue assembly support, divide and obtain several flue segments;

[0087] S2. Construct a cantilevered transfer platform 4 and a traveling platform 7 on the assembly bracket;

[0088] S3. Obtain the walking mechanism 11;

[0089] S4. Transport the several flue sections obtained in step S1 to the construction site;

[0090] S5. According to the preset assembly sequence, use hoisting equipment I15 to hoist the first flue section to the cantilever transfer platform 4;

[0091] The flue segment has lifting nodes, including a top lifting node on the top surface of the flue segment and a side lifting node on the side surface of the flue segment. The side lifting node includes two symmetrical nodes with respect to the axis of the flue segment. Every two side lifting nodes and one top lifting node on the same circumference of the flue segment form a group of lifting points. Multiple groups of lifting points are provided on the flue segment, and the multiple groups of lifting points are symmetrical about the middle of the length of the flue segment. In this scheme, each flue segment has two groups of lifting points, and the corresponding lifting equipment II or III for lifting one flue segment also consists of two groups, achieving the function of balanced and stable lifting, which will not be elaborated further here.

[0092] S6. The flue section is hoisted from the cantilevered transfer platform 4 to the traveling mechanism 11 using hoisting equipment II;

[0093] The hoisting equipment II consists of several hoisting points corresponding to the number of hoisting points on the flue section, and each hoisting equipment II is set on the flue assembly bracket.

[0094] S6a. Before hoisting the flue section from the cantilever transfer platform 4 to the traveling mechanism 11 using the hoisting equipment II, each of the hoisting points is connected to the hoisting equipment II respectively;

[0095] S6b. The flue section is hoisted from the cantilevered transfer platform 4 to the top of the flue assembly layer 2 using hoisting equipment II;

[0096] S6c. Raise the flue section to a set position higher than the top edge of the traveling mechanism 11; the flue section is 0.2m to 0.3m higher than the top edge of the traveling mechanism 11; to facilitate the raising and lowering of the flue section, and in this scheme, this distance is 0.3m;

[0097] S6d. Drive the walking mechanism 11 to move to the bottom of the flue section;

[0098] S6e. Move the flue section to the traveling mechanism 11;

[0099] S7. Remove hoisting equipment II, drive the traveling mechanism 11 to transport the flue section to the preset position of the flue assembly layer 2, and set hoisting equipment III 16 near the preset position of the flue assembly layer 2;

[0100] S8. The flue section is hoisted from the traveling mechanism 11 to the preset position of the flue assembly layer 2 using the hoisting equipment Ⅲ16;

[0101] The hoisting equipment Ⅲ16 consists of several hoisting points corresponding to the number of hoisting points on the flue section, and each hoisting equipment Ⅲ16 is set on the flue assembly bracket.

[0102] S8a. Connect each of the aforementioned lifting points to the corresponding lifting equipment Ⅲ16;

[0103] S8b. Raise the flue section to a set position higher than the top edge of the traveling mechanism 11; the flue section is 0.2m to 0.3m higher than the top edge of the traveling mechanism 11; in this scheme, it is 0.3m.

[0104] S8c. The flue section is hoisted from the traveling mechanism 11 to the top of the preset position of the flue assembly layer 2 using the hoisting equipment Ⅲ16;

[0105] S8d. Drive the walking mechanism 11 to move out to the bottom of the flue section;

[0106] S9. Repeat steps S5 to S8 to transport the second flue section to its preset position in the flue assembly layer 2;

[0107] The first flue section and the second flue section are close together, and the hoisting equipment Ⅲ16 consists of several groups corresponding to the number of flue sections, so that adjacent flue sections are close together;

[0108] S10. Weld adjacent flue sections; adjust the hoisting equipment Ⅲ16 of the corresponding flue section to make the adjacent flue sections meet the preset welding standards;

[0109] S11. Remove the walking platform 7 at the bottom of the adjacent flue section after welding;

[0110] S12. Weld the flue section support to the flue section;

[0111] S12a. In the area where the walking platform 7 is removed from the flue assembly layer 2, the flue segment support is welded to the flue assembly layer 2 at the bottom of the corresponding position of the flue segment in this area.

[0112] S12b. Adjust the hoisting equipment Ⅲ16 of the corresponding flue section so that the flue section after butt welding in this area is lowered onto the flue section support;

[0113] S12c. Weld the flue section to the flue section support and remove the corresponding hoisting equipment Ⅲ16;

[0114] S13. An ash hopper is installed at the bottom of the flue section equipped with the flue section support obtained in step 12;

[0115] S14. Repeat steps S9 to S13, and assemble the flue section, flue section support and ash hopper in the predetermined order;

[0116] S15. Flue closure; The flue segment located at the cantilevered transfer platform 4 is the final flue segment;

[0117] S15a. Before constructing the last flue section, remove the traveling mechanism 11 located on the traveling platform 7;

[0118] S15b. Use hoisting equipment I15 to hoist the last flue section to the cantilevered transfer platform 4;

[0119] S15c. The last flue section is hoisted from the cantilevered transfer platform 4 to the top of the flue assembly layer 2 using hoisting equipment II;

[0120] S15d. Weld the last flue section to the flue sections located on both sides thereon;

[0121] S15e. Remove the walking platform 7 and cantilevered transfer platform 4 at the bottom of the last flue section;

[0122] S15f. Assemble the ash hopper to the bottom of the last flue section; remove the hoisting equipment II.

[0123] This utility model eliminates the traditional installation sequence of "support first, then cylinder" and innovatively adopts the sequence of "cylinder first, then support." Specifically, it eliminates the use of angle steel as a sliding track for the large flue cylinder, instead utilizing I-beams as the support bracket and sliding rail 9 for the large flue's transport. An innovative walking mechanism 11 transforms sliding friction into rolling friction, reducing paint peeling and structural damage caused by friction between the large flue and the angle steel. This method is low-cost, highly efficient, and safe and stable. It effectively solves the problem of transporting and installing large flues in confined spaces, is easy to operate, significantly improves work efficiency, and saves on manpower, materials, and equipment compared to traditional hoisting methods, while providing excellent protection for the finished product.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A flue construction system for confined spaces, characterized in that: This includes a support subsystem, a hoisting subsystem, and a travel subsystem; The support subsystem includes a flue assembly bracket built on a base surface at a set location. The flue assembly bracket has an ash hopper assembly layer located on top of the base surface, a flue assembly layer located on top of the ash hopper assembly layer, and a flue hoisting layer located on top of the flue assembly layer. The support subsystem also includes a cantilevered transfer platform that protrudes outward from the flue assembly layer, and the cantilevered transfer platform is located near the front 1 / 3 of the length of the flue assembly support. The support subsystem also includes a traveling platform that runs along the entire length of the flue mounting bracket, the top surface of which is flush with the top surface of the cantilevered transfer platform; The walking subsystem includes a walking mechanism driven to walk on a walking platform, the walking platform having a track for defining the walking route of the walking mechanism, the walking mechanism being guided by the track to walk in a predetermined direction; The hoisting subsystem includes hoisting equipment I for hoisting the flue from a preset position to the cantilevered transfer platform, hoisting equipment II for hoisting the flue from the cantilevered transfer platform to the traveling mechanism, and hoisting equipment III for hoisting the flue from the traveling mechanism to the flue assembly layer. The cantilevered transfer platform includes a cantilevered transfer platform body, which extends along the length of the flue assembly support perpendicular to the flue assembly support and is welded and fixed to the frame beam that forms the flue assembly layer; the inner end of the cantilevered transfer platform body is assembled with the flue assembly layer through a fastening structure wrapped around one of the frame beams. The traveling mechanism has a bearing surface for supporting the chimney; after the chimney is installed on the traveling mechanism, the axis of the chimney is parallel to the traveling direction of the traveling mechanism; a plurality of flue support brackets are provided on the bearing surface, and the plurality of flue support brackets are arranged in pairs along the axis of the chimney to support the chimney, and a plurality of groups of flue support brackets are arranged along the axis of the chimney; the flue support brackets have an arc facing the chimney; the traveling platform has a fixed bracket connected to the ash hopper assembly layer; the outer end of the main body of the cantilevered transfer platform is assembled with the ash hopper assembly layer through a diagonal brace beam.

2. The flue construction system for confined spaces according to claim 1, characterized in that: The traveling mechanism has a rail lock for cooperating with the track to limit the traveling mechanism to a set position.

3. The flue construction system for confined spaces according to claim 1, characterized in that: The walking mechanism is equipped with an anti-collision protection device.

4. The flue construction system for confined spaces according to claim 1, characterized in that: Several sets of flue support brackets are evenly distributed from the center of the bearing surface to both ends of the flue axis.

Images