Flue installation system and method for confined space

Abstract

The invention discloses a flue installation system and method for a limited space, and the system comprises a flue assembly support which is built on a set position basic plane, a supporting subsystem further comprises an overhanging transfer platform which protrudes out of a flue assembly layer, and a walking platform which is arranged along the whole length of the flue assembly support. The top face of the walking platform is flush with the top face of the cantilever transfer platform. The walking subsystem comprises 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. The hoisting subsystem comprises hoisting equipment I used for hoisting the flue from a preset position to the cantilever transfer platform, hoisting equipment II used for hoisting the flue from the cantilever transfer platform to the 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] The present invention relates to the field of installing flue ducts in confined spaces, and specifically relates to a flue duct installation system and method for confined spaces. Background Art

[0002] During the construction of sintering projects, the installation of the large sintering flue duct in the sintering chamber is the key and difficult point of the installation work in the project. Because the pipe diameter is relatively large, the pipe wall is relatively thin, and the installation space is narrow and restricted, the conventional hoisting machinery installation method cannot be used.

[0003] If the currently existing sliding installation method in the industry is adopted, that is: one is to install the track on the top frame beam of the existing assembly support, but it requires a large investment in measures and the steel plate embedding work must be carried out in advance, resulting in a high construction cost; the other is to install the flue duct support first, and then the large flue duct cylinder is slid and transported by means of angle steel slide rails + winches. However, the dragging of the large flue duct will cause strong friction with the angle steel, resulting in the dropping of the paint on the flue duct body and structural damage, and at the same time generating noise. In addition, due to the large difficulty in fine-tuning control of the winch and the large influence of external forces on the pulling, there are potential construction safety hazards.

[0004] Therefore, to solve the above problems, a flue duct installation system and method for confined spaces are needed, which can complete the installation construction of the flue duct efficiently and stably on the premise of controlling the construction cost. Summary of the Invention

[0005] In view of this, the purpose of the present invention is to overcome the defects in the prior art and provide a flue duct installation system and method for confined spaces, which can complete the installation construction of the flue duct efficiently and stably on the premise of controlling the construction cost.

[0006] The flue duct installation system and method for confined spaces of the present invention include a support subsystem, a hoisting subsystem, and a walking subsystem;

[0007] The support subsystem includes a flue duct assembly support built on the foundation surface at a set position. The flue duct assembly support has a hopper assembly layer at the top of the foundation surface, a flue duct assembly layer at the top of the hopper assembly layer, and a flue duct hoisting layer at the top of the flue duct assembly layer;

[0008] The support subsystem further includes a cantilever transfer platform protruding outward from the flue duct assembly layer. The support subsystem also includes a walking platform arranged along the entire length of the flue duct assembly support. The walking platform has a fixed support connected to the hopper assembly layer, and the top surface of the walking platform is flush with the top surface of the cantilever transfer platform;

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

[0010] The hoisting subsystem includes a hoisting device I for hoisting the flue gas duct from a preset position to the cantilever transfer platform, a hoisting device II for hoisting the flue gas duct from the cantilever transfer platform to the walking mechanism, and a hoisting device III for hoisting the flue gas duct from the walking mechanism to the flue gas duct assembly layer. The hoisting device I is a truck crane, and the hoisting devices II and III are both hoist chains.

[0011] Furthermore, the cantilever transfer platform is located near the front 1 / 3 of the entire length of the flue gas duct assembly bracket;

[0012] The cantilever transfer platform includes a cantilever transfer platform main body, which extends in a direction perpendicular to the entire length of the flue gas duct assembly bracket and is welded and fixed to the frame beam forming the flue gas duct assembly layer.

[0013] Furthermore, the inner end of the cantilever transfer platform main body is assembled with the flue gas duct assembly layer through a fastening structure that wraps around one of the frame beams.

[0014] The outer end of the cantilever transfer platform main body is assembled with the hopper assembly layer through a diagonal bracing beam.

[0015] Furthermore, the walking mechanism has a track locking device for cooperating with the track to limit the position of the walking mechanism at a set position.

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

[0017] For example, devices such as travel switches, limit switches, and proximity switches for limiting the movement range of the walking mechanism. Or a composite anti-collision protection device combining a traditional mechanical collision type limiter or a photoelectric sensor, etc., will not be elaborated 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, which are respectively arranged at the head and end of the track. The infrared anti-collision limit switches correspond one-to-one with the number of laser travel limit reflectors, and are respectively arranged on the walking mechanism.

[0019] Furthermore, the walking mechanism has a bearing surface for carrying the chimney; after the chimney is set on the walking mechanism, the axis of the chimney is parallel to the walking direction of the walking mechanism;

[0020] Several flue gas duct support brackets are arranged on the bearing surface. Several flue gas duct support brackets are grouped in pairs and support the chimney in opposite directions along the axis of the chimney, and several groups of flue gas duct support bracket groups are arranged along the axial direction of the chimney.

[0021] Several groups of flue supports are evenly distributed from the center of the bearing surface to both axial ends of the flue.

[0022] Furthermore, the flue support has a curvature towards the chimney.

[0023] This solution also discloses a flue installation method based on the above flue installation system for a confined space, including the following construction steps:

[0024] S1. Divide and obtain several flue segments according to the bay size of the flue assembly bracket.

[0025] S2. Build a cantilever transfer platform and a walking platform on the assembly bracket.

[0026] S3. Obtain a walking mechanism.

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

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

[0029] The flue segment has hoisting nodes, and the hoisting nodes include a top hoisting node located on the top surface of the flue segment and side hoisting nodes located on the side surface of the flue segment. The side hoisting nodes include two that are symmetric with respect to 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 set of hoisting points. There are multiple sets of hoisting points on the flue segment, and the multiple sets of hoisting points are symmetric about the middle of the length direction of the flue segment.

[0030] S6. Hoist the flue segment from the cantilever transfer platform to the walking mechanism by hoisting equipment Ⅱ.

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

[0032] S6a. Before hoisting the flue segment from the cantilever transfer platform to the walking mechanism by hoisting equipment Ⅱ, connect each of the hoisting points to the hoisting equipment Ⅱ respectively.

[0033] S6b. Hoist the flue segment from the cantilever transfer platform to the top of the flue assembly layer by hoisting equipment Ⅱ.

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

[0035] S6d. Drive the walking mechanism to move to the bottom of the flue segment.

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

[0037] S7. Remove the hoisting device II, drive the traveling mechanism to transport the flue duct section to the preset position on the flue duct assembly layer, and the hoisting device III is arranged near the preset position on the flue duct assembly layer;

[0038] S8. Hoist the flue duct section from the traveling mechanism to the preset position on the flue duct assembly layer by the hoisting device III;

[0039] The number of the hoisting devices III is several corresponding to the number of the hoisting points on the flue duct section, and each hoisting device III is arranged on the flue duct assembly bracket correspondingly;

[0040] S8a. Connect each of the hoisting points to the hoisting device III respectively;

[0041] S8b. Lift the flue duct section to a set position higher than the top edge of the traveling mechanism; the flue duct section is 0.2 m to 0.3 m higher than the top edge of the traveling mechanism;

[0042] S8c. Hoist the flue duct section from the traveling mechanism to the top of the preset position on the flue duct assembly layer by the hoisting device III;

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

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

[0045] The first flue duct section and the second flue duct section are close to each other, and the hoisting devices III are several groups corresponding to the number of the flue duct sections, so that the adjacent flue duct sections are close to each other;

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

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

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

[0049] S12a. In the area where the walking platform is removed on the flue duct assembly layer, weld the flue duct section support to the flue duct assembly layer at the corresponding position at the bottom of the flue duct section in this area;

[0050] S12b. Adjust the hoisting device III of the corresponding flue duct section to make the flue duct section after butt welding in this area fall onto the flue duct section support;

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

[0052] S13. Install a hopper at the bottom of the flue section equipped with a flue section support obtained in step 12;

[0053] S14. Repeat steps S9 - S13 to assemble the flue sections, flue section supports, and hoppers in a predetermined order;

[0054] S15. Close the flue; the flue section located on the cantilever transfer platform is the last flue section;

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

[0056] S15b. Use lifting equipment Ⅰ to lift the last flue section to the cantilever transfer platform;

[0057] S15c. Use lifting equipment Ⅱ to lift the last flue section from the cantilever transfer platform to the top of the flue assembly layer;

[0058] S15d. Weld the last flue section to the flue sections on its two sides;

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

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

[0061] The beneficial effects of the present invention are as follows: A flue installation system and method for a confined space disclosed by the present invention effectively solve the problems of transporting and installing large flues in a limited space, are easy to operate, significantly improve work efficiency, save input of labor, materials, and machinery compared with traditional hoisting, and have a good effect on finished product protection. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0063] Figure 1 It is a structural schematic diagram of the construction of the first flue section of the present invention;

[0064] Figure 2 It is a structural schematic diagram of the transportation of the flue section on the walking platform through the traveling mechanism of the present invention;

[0065] Figure 3 It is a structural schematic diagram of the walking platform of the present invention;

[0066] Figure 4 It is a structural schematic diagram of the traveling mechanism of the present invention;

[0067] Figure 5 It is a structural schematic diagram of the node treatment of the walking platform and the cantilever platform at the track position of the present invention;

[0068] Figure 6 Schematic diagram of the structure of the flue segment of the present invention arranged at a set position by hoisting device III;

[0069] Figure 7 For the present invention Figure 6 Front view structure schematic diagram;

[0070] Figure 8 For the present invention Figure 6 Enlarged schematic diagram of the structure at position A in the present invention;

[0071] Figure 9 Schematic diagram of the structure of the flue segments of the present invention hoisted and constructed one by one;

[0072] Figure 10 Schematic diagram of the structure of adjacent flue segments of the present invention approaching each other;

[0073] Figure 11 Schematic diagram of the structure of the flue closure of the present invention. Detailed implementation manners

[0074] Figures 1 to 11 Schematic diagram of the structure of the present invention. As shown in the figure, the flue installation system and method for a confined space in this embodiment include a support subsystem, a hoisting subsystem, and a walking subsystem;

[0075] As Figure 1 and Figure 11 shown, the support subsystem includes a flue assembly support built on the foundation surface at a set position. The flue assembly support has a hopper assembly layer 1 at the top of the foundation surface, a flue assembly layer 2 at the top of the hopper assembly layer 1, and a flue hoisting layer 3 at the top of the flue assembly layer 2. Among them, the flue assembly support includes vertically arranged frame columns and horizontally arranged frame beams, and also includes concrete platforms poured at the corresponding hopper assembly layer 1 and flue hoisting layer 3. The hopper assembly layer 1 is used for hopper assembly construction, the flue assembly layer 2 is used to carry flue segments, and the flue hoisting layer 3 is used to hoist flue segments, providing a construction site for operators in a limited space and assisting in the assembly construction of flue segments.

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

[0077] The cantilever transfer platform 4 includes a cantilever transfer platform main body, which extends along the longitudinal direction perpendicular to the flue assembly bracket and is fixedly welded to the frame beam forming the flue assembly layer 2. Specifically, the inner end of the cantilever transfer platform main body is assembled with the flue assembly layer 2 through a fastening structure wrapped around one of the frame beams. The fastening structure includes a hoop 5, and multiple groups of hoops 5 are arranged along the width direction of the cantilever transfer platform 4 to improve the assembly reliability, with higher structural strength, and reduce defects such as warping or cracking caused by the weight at the cantilever position, which affect the construction of the project. The outer end of the cantilever transfer platform main body is assembled with the hopper assembly layer 1 through a diagonal bracing beam 6. The diagonal bracing beam 6 is several roots arranged along the width direction of the cantilever transfer platform 4, and the diagonal bracing beam 6 and the cantilever transfer platform 4 form a triangular support structure, which is beneficial to improving the bearing capacity.

[0078] In this embodiment, as Figure 1 , Figure 2 and Figure 5 shown, the support subsystem further includes a walking platform 7 arranged along the longitudinal direction of the flue assembly bracket. The walking platform 7 has a fixed bracket 8 connected to the hopper assembly layer 1. The fixed bracket 8 is arranged parallel to the vertical direction, and the top end of the fixed bracket 8 is welded to the walking platform 7, and the bottom end of the fixed bracket 8 is welded to the steel plate embedded in the hopper assembly layer 1. The fixed bracket 8 is several roots gathered and arranged at the bottom of the walking platform 7, with higher structural strength, and can be cut along the root during subsequent demolition, which will not be elaborated here. The walking platform 7 also penetrates through the cantilever transfer platform 4, and the top surface of the walking platform 7 is flush with the top surface of the cantilever transfer platform 4. There is a track 9 on the walking platform 7. As Figure 5 is the node treatment structure of the walking platform 7 and the cantilever platform at the position of the track 9. The cantilever transfer platform 4 is grooved at the laying position of the track 9 to make the track 9 continuous, which is beneficial for the traveling of the traveling mechanism 11.

[0079] In this embodiment, as Figures 1 to 4 shown, the walking subsystem includes a walking mechanism 11 driven to travel on the walking platform 7. The walking platform 7 has a track 9 for defining the traveling route of the walking mechanism 11. More specifically, the track 9 includes two parallel tracks arranged along the longitudinal direction of the walking platform 7, and the walking mechanism 11 is guided by the track 9 to travel in a predetermined direction. The walking mechanism 11 can be a wheeled walking vehicle, a tracked walking vehicle, or a crawler-type walking vehicle, etc. In this solution, the walking mechanism 11 is a tracked walking vehicle, which is more suitable for the track 9 set on the walking platform 7, with better traveling ability and bearing capacity, higher transportation efficiency for the flue segments, and more stable transportation. The tracked walking vehicle includes a driving walking steel wheel, a passive walking steel wheel, and a driving motor for driving the driving walking steel wheel, etc., which will not be elaborated here.

[0080] In this embodiment, the traveling mechanism 11 is provided with a track locking device 10 for cooperating with the track 9 to limit the traveling mechanism 11 at a set position. The track locking device 10 is selected from any one suitable for this solution and is arranged near the driving steel wheel to improve the braking ability and facilitate positioning the traveling mechanism 11 at the set position.

[0081] In this embodiment, an anti-collision protection device is further arranged on the traveling mechanism 11 to improve the transportation safety of the traveling mechanism 11; for example, devices such as travel switches, limit switches, and proximity switches for limiting the movement range of the traveling mechanism 11. Or a composite anti-collision protection device combining a traditional mechanical collision type limiter or a photoelectric sensor, etc., which will not be elaborated here. In this solution, the anti-collision protection device includes an infrared anti-collision limit travel switch 12 and a laser travel limit reflector 13; there are several laser travel limit reflectors, which are respectively arranged at the head and end of the track 9, the number of infrared anti-collision limit travel switches corresponds one-to-one with the number of laser travel limit reflectors, and they are respectively arranged on the traveling mechanism 11.

[0082] In this embodiment, the traveling mechanism 11 has a bearing surface for carrying the chimney; more specifically, the bearing surface is on the top surface of the platform supported by the driving traveling steel wheels and the driven traveling steel wheels of the traveling mechanism 11. After the chimney is arranged on the traveling mechanism 11, the axis of the chimney is parallel to the traveling direction of the traveling mechanism 11, which is beneficial to ensuring the transportation stability and reliability of the chimney section. A number of flue supports 14 are arranged on the bearing surface, and the flue supports 14 have a curvature facing the chimney; this curvature is approximately the same as the curvature of the chimney section, further enhancing the support strength, reducing the transportation center of gravity of the flue section, and ensuring that the chimney section does not shift during transportation. The number of flue supports 14 are supported against the chimney in pairs along the axis of the chimney, and a number of groups of flue supports 14 are arranged along the axial direction of the chimney; the number of groups of flue supports 14 are evenly distributed from the center of the bearing surface to both ends of the flue axis. In this solution, two groups of flue supports 14 are correspondingly and evenly distributed on both sides of the middle part of the flue axis length direction, improving the stability of the flue section arranged on the traveling mechanism 11 and enhancing the construction quality and construction efficiency. To eliminate as much as possible the starting and braking forces when the traveling mechanism 11 moves, the fixed support 8 and the frame beam are welded and fixed with angle steel braces to strengthen the overall stability of the structure. In this embodiment, the hoisting subsystem includes a hoisting device I 15 for hoisting the flue from a preset position to the cantilever transfer platform 4, a hoisting device II for hoisting the flue from the cantilever transfer platform 4 to the traveling mechanism 11, and a hoisting device III 16 for hoisting the flue from the traveling mechanism 11 to the flue assembly layer 2. The hoisting device I 15 is a truck crane, and of course it can also be other lifting and hoisting equipment, such as a tyre crane or a tower crane, etc., which will not be elaborated here. The hoisting device II and the hoisting device III 16 are both hoist winches. In this solution, the hoisting device II and the hoisting device III 16 have the same structure, and the structure after being grouped is also the same, with similar functions, only the usage frequencies are different, so the names are distinguished, which will not be elaborated here.

[0083] In this embodiment, as Figure 6 and Figure 8 shown, taking the structure of one group of hoisting devices III 16 as an example, one group of hoisting device groups includes two hoist winches oppositely arranged at the bottom of the chimney. The two hoist winches correspond to not exceed the center of the chimney section. The two hoist winches are respectively arranged on the frame columns at the corresponding positions and are connected to the side hoisting nodes of the chimney section. The center of the chimney section is finely adjusted by the hoist winches under the corresponding conditions. One group of hoisting device groups also includes a hoist winch located at the top of the center of the chimney section. This hoist winch functions as the main hoist, so it is supported on the flue hoisting layer 3 through a hoisting bracket. It should be understood that multiple hoist winches can be arranged on the erected hoisting bracket to achieve the established purpose, which will not be elaborated here.

[0084] Holes are formed in the beam-slab corresponding to the hoisting winches on the flue hoisting layer 3, and the periphery of the holes is enclosed by strengthening beams. The hoisting support includes a cross beam 17 for assembling the hoisting winch, and two columns 18 respectively supported at both ends of the cross beam and connected to the flue hoisting layer 3. The two columns and the cross beam form a portal structure correspondingly. It also includes a bottom beam 19 connected to the bottom of the columns. The bottom beam, the columns and the cross beam are arranged in three degrees of freedom and are perpendicular to each other pairwise, with better structural strength and better supporting capacity. Preferably, a cross beam stiffening diagonal brace 20 is arranged between the cross beam and the columns, and a column stiffening diagonal brace 21 is arranged between the columns and the bottom beam, further ensuring the structural strength during use.

[0085] Among them, the sum of the grouped hoisting devices III 16 and the grouped hoisting devices II is at least the same as the number of sections of the flue section. The grouped hoisting devices II are arranged at the top of the position where the cantilever transfer platform 4 is erected, and the remaining hoisting devices III 16 are respectively arranged in a one-to-one correspondence with the positions of the flue sections to be installed. This solution also discloses a flue installation method based on the above flue installation system for a confined space, including the following construction steps:

[0086] S1. Divide and obtain a number of flue sections according to the bay size of the flue assembly support.

[0087] S2. Erect a cantilever transfer platform 4 and a walking platform 7 on the assembly support.

[0088] S3. Obtain a walking mechanism 11.

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

[0090] S5. Hoist the first flue section to the cantilever transfer platform 4 by using the hoisting device I 15 according to the preset assembly sequence.

[0091] The flue section has hoisting nodes, and the hoisting nodes include a top hoisting node located on the top surface of the flue section and side hoisting nodes located on the side surface of the flue section. The side hoisting nodes include two that are symmetric with respect to the axis of the flue section. Every two side hoisting nodes and one top hoisting node on the same circumference of the flue section form a set of hoisting points. Multiple sets of hoisting points are arranged on the flue section, and the multiple sets of hoisting points are symmetric about the middle of the length direction of the flue section. There are two sets of hoisting points on each flue section in this solution, and the corresponding hoisting devices II or III for hoisting one flue section are also two sets, achieving the function of balanced and stable hoisting, which will not be elaborated here.

[0092] S6. Hoist the flue section from the cantilever transfer platform 4 to the walking mechanism 11 by using the hoisting device II.

[0093] The hoisting device II is several in number corresponding to the number of hoisting points on the flue duct segment, and each hoisting device II is arranged correspondingly on the flue duct assembly bracket;

[0094] S6a. Before hoisting the flue duct segment from the cantilever transfer platform 4 to the traveling mechanism 11 by the hoisting device II, connect each of the hoisting points respectively and correspondingly to the hoisting device II;

[0095] S6b. Hoist the flue duct segment from the cantilever transfer platform 4 to the top of the flue duct assembly layer 2 by the hoisting device II;

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

[0097] S6d. Drive the traveling mechanism 11 to move to the bottom of the flue duct segment;

[0098] S6e. Lower the flue duct segment onto the traveling mechanism 11;

[0099] S7. Remove the hoisting device II, drive the traveling mechanism 11 to transport the flue duct segment to a preset position on the flue duct assembly layer 2, and the hoisting device III 16 is arranged near the preset position on the flue duct assembly layer 2;

[0100] S8. Hoist the flue duct segment from the traveling mechanism 11 to the preset position on the flue duct assembly layer 2 by the hoisting device III 16;

[0101] The hoisting device III 16 is several in number corresponding to the number of hoisting points on the flue duct segment, and each hoisting device III 16 is arranged correspondingly on the flue duct assembly bracket;

[0102] S8a. Connect each of the hoisting points respectively and correspondingly to the hoisting device III 16;

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

[0104] S8c. Hoist the flue duct segment from the traveling mechanism 11 to the top of the preset position on the flue duct assembly layer 2 by the hoisting device III 16;

[0105] S8d. Drive the traveling mechanism 11 to move out to the bottom of the flue duct segment;

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

[0107] The first flue duct segment is close to the second flue duct segment, and there are several groups of the hoisting devices III 16 corresponding to the number of flue duct segments, so that adjacent flue duct segments are close to each other;

[0108] S10. Weld adjacent flue duct segments; adjust the hoisting devices III 16 of the corresponding flue duct segments to make the adjacent flue duct segments meet the preset welding standards;

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

[0110] S12. Weld the flue duct segment supports to the flue duct segments;

[0111] S12a. In the area where the walking platform 7 is removed on the flue duct assembly layer 2, weld the flue duct segment supports to the flue duct assembly layer 2 at the corresponding position at the bottom of the flue duct segments in this area;

[0112] S12b. Adjust the hoisting devices III 16 of the corresponding flue duct segments to make the flue duct segments after butt welding in this area drop onto the flue duct segment supports;

[0113] S12c. Weld the flue duct segments to the flue duct segment supports, and remove the corresponding hoisting devices III 16;

[0114] S13. Install ash hoppers at the bottom of the flue duct segments equipped with flue duct segment supports obtained in step 12;

[0115] S14. Repeat steps S9 - S13 to assemble flue duct segments, flue duct segment supports and ash hoppers in a set order;

[0116] S15. Flue duct closure; the flue duct segment located on the cantilever transfer platform 4 is the last flue duct segment;

[0117] S15a. Before the construction of the last flue duct segment, remove the traveling mechanism 11 located on the walking platform 7;

[0118] S15b. Use the hoisting device I 15 to hoist the last flue duct segment to the cantilever transfer platform 4;

[0119] S15c. Hoist the last flue duct segment from the cantilever transfer platform 4 to the top of the flue duct assembly layer 2 through the hoisting device II;

[0120] S15d. Weld the last flue duct segment to the flue duct segments on its two sides;

[0121] S15e. Remove the walking platform 7 at the bottom of the last flue duct segment and the cantilever transfer platform 4;

[0122] S15f. Assemble the ash hopper to the bottom of the last flue duct segment; remove the hoisting device II.

[0123] The present invention cancels the installation sequence of "first support, then cylinder body", and innovatively adopts the installation sequence of "first cylinder body, then support", that is, cancels the way of using angle steel as the slideway of the large flue cylinder body, uses I-beam as the support bracket and sliding track 9 for the transfer of the large flue, and innovatively adopts the traveling mechanism 11 to change sliding friction into rolling friction, reducing the paint dropping and structural damage of the flue body caused by the friction between the large flue and the angle steel during sliding. It has low cost, high construction efficiency, and is safe and stable; this method effectively solves the problem of transferring and installing the large flue in a limited space, is easy to operate, significantly improves the work efficiency, saves the input of labor, materials and machinery compared with the traditional hoisting, and has a good finished product protection effect.

[0124] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the preferred embodiments, those of ordinary skill in the art should understand that the technical solutions of the present invention can be modified or equivalently replaced without departing from the purpose and scope of the technical solutions of the present invention, and they should all be covered within the scope of the claims of the present invention.

Claims

1. A flue installation system for a confined space, characterized in that: It includes a support subsystem, a hoisting subsystem and a walking subsystem; The support subsystem includes a flue duct assembly support built on the foundation surface at a set position. The flue duct assembly support has an ash hopper assembly layer at the top of the foundation surface, a flue duct assembly layer at the top of the ash hopper assembly layer, and a flue duct hoisting layer at the top of the flue duct assembly layer; The support subsystem further includes a cantilever transfer platform protruding outward from the flue duct assembly layer. The support subsystem also includes a walking platform arranged along the entire length of the flue duct assembly support. The top surface of the walking platform is flush with the top surface of the cantilever transfer platform; The walking subsystem includes a walking mechanism driven to walk on the walking platform. The walking platform has tracks for defining the walking route of the walking mechanism, and the walking mechanism is guided by the tracks to walk in a predetermined direction; The hoisting subsystem includes a hoisting device Ⅰ for hoisting the flue duct from a preset position to the cantilever transfer platform, a hoisting device Ⅱ for hoisting the flue duct from the cantilever transfer platform to the walking mechanism, and a hoisting device Ⅲ for hoisting the flue duct from the walking mechanism to the flue duct assembly layer.

2. The flue installation system for a confined space according to claim 1, wherein: The cantilever transfer platform is located near the first 1 / 3 of the entire length of the flue duct assembly support; The cantilever transfer platform includes a cantilever transfer platform main body, which extends along a direction perpendicular to the entire length of the flue duct assembly support and is welded and fixed to the frame beam forming the flue duct assembly layer.

3. The flue installation system for a confined space according to claim 2, wherein: The inner end of the cantilever transfer platform main body is assembled with the flue duct assembly layer through a fastening structure wrapped around one of the frame beams.

4. The flue installation system for a confined space according to claim 1, characterized in that: The walking mechanism has a rail locking device for cooperating with the track to limit the walking mechanism at a set position.

5. The flue installation system for a confined space according to claim 1, characterized in that: An anti-collision protection device is provided on the walking mechanism.

6. The flue installation system for a confined space according to claim 1, characterized in that: The walking mechanism has a bearing surface for carrying the chimney. After the chimney is arranged on the walking mechanism, the axis of the chimney is parallel to the walking direction of the walking mechanism; A number of flue duct support brackets are arranged on the bearing surface. The number of flue duct support brackets is in pairs and supports the chimney oppositely along the axis of the chimney. A number of groups of flue duct support bracket groups are arranged along the axial direction of the chimney.

7. The flue installation system for a confined space according to claim 6, characterized in that: The flue duct support bracket has a curvature facing the chimney.

8. A flue installation method for a flue installation system for a confined space according to any one of claims 1-7, characterized in that: It includes the following construction steps: S1. According to the bay size of the flue duct assembly support, divide and obtain a number of flue duct segments; S2. Build a cantilever transfer platform and a walking platform on the assembly support; S3. Obtain a walking mechanism; S4. Transport the number of flue duct segments obtained in step S1 to the construction site; S5. Hoist the first flue duct segment to the cantilever transfer platform by using the hoisting device Ⅰ according to the preset assembly sequence; The flue duct segment has hoisting nodes, which include a top hoisting node on the top surface of the flue duct segment and side hoisting nodes on the side surface of the flue duct segment. The side hoisting nodes include two that are symmetric with respect to the axis of the flue duct segment. Each two side hoisting nodes and one top hoisting node on the same circumference of the flue duct segment form a set of hoisting points. A number of sets of hoisting points are arranged on the flue duct segment, and the number of sets of hoisting points is symmetric about the middle of the length direction of the flue duct segment; S6. Hoist the flue duct segment from the cantilever transfer platform to the walking mechanism by the hoisting device Ⅱ; The number of the hoisting devices Ⅱ is corresponding to the number of hoisting points on the flue duct segment, and each hoisting device Ⅱ is arranged on the flue duct assembly support correspondingly; S6a. Before hoisting the flue gas duct segment from the cantilever transfer platform to before the traveling mechanism by the hoisting device II, connect each of the hoisting points to the hoisting device II respectively and individually. S6b. Hoist the flue gas duct segment from the cantilever transfer platform to the top of the flue gas assembly layer by the hoisting device II. S6c. Raise the flue gas duct segment to a set position higher than the top edge of the traveling mechanism. S6d. Drive the traveling mechanism to shift to the bottom of the flue gas duct segment. S6e. Lower the flue gas duct segment onto the traveling mechanism. S7. Remove the hoisting device II, drive the traveling mechanism to transport the flue gas duct segment to the preset position on the flue gas assembly layer, and the hoisting device III is arranged near the preset position on the flue gas assembly layer. S8. Hoist the flue gas duct segment from the traveling mechanism to the preset position on the flue gas assembly layer by the hoisting device III. The number of the hoisting devices III is several corresponding to the number of hoisting points on the flue gas duct segment, and each of the hoisting devices III is arranged on the flue gas assembly bracket. S8a. Connect each of the hoisting points to the hoisting device III respectively and individually. S8b. Raise the flue gas duct segment to a set position higher than the top edge of the traveling mechanism. S8c. Hoist the flue gas duct segment from the traveling mechanism to the top of the preset position on the flue gas assembly layer by the hoisting device III. S8d. Drive the traveling mechanism to move out to the bottom of the flue gas duct segment. S9. Repeat steps S5 - S8 to transport the second flue gas duct segment to its preset position on the flue gas assembly layer. The first flue gas duct segment and the second flue gas duct segment are close to each other. The number of the hoisting devices III is several groups corresponding to the number of segments of the flue gas duct segment, so that the adjacent flue gas duct segments are hoisted close to each other. S10. Weld the adjacent flue gas duct segments; adjust the hoisting device III corresponding to the flue gas duct segment to make the adjacent flue gas duct segments meet the preset welding standard. S11. Remove the traveling platform at the bottom of the adjacent flue gas duct segments after welding. S12. Weld the flue gas duct segment support to the flue gas duct segment. S12a. In the area where the traveling platform is removed on the flue gas assembly layer, weld the flue gas duct segment support to the flue gas assembly layer at the corresponding position at the bottom of the flue gas duct segment in this area. S12b. Adjust the hoisting device III corresponding to the flue gas duct segment to make the flue gas duct segment in this area after butt welding fall onto the flue gas duct segment support. S12c. Weld the flue gas duct segment to the flue gas duct segment support, and remove the corresponding hoisting device III. S13. Install the ash hopper at the bottom of the flue gas duct segment equipped with the flue gas duct segment support obtained in step 12. S14. Repeat steps S9 - S13 to assemble the flue gas duct segments, flue gas duct segment supports and ash hoppers in the established order. S15. Flue gas closure; the flue gas duct segment located on the cantilever transfer platform is the last flue gas duct segment. S15a. Before the construction of the last flue gas duct segment, remove the traveling mechanism located on the traveling platform. S15b. Use the hoisting device I to hoist the last flue gas duct segment to the cantilever transfer platform. S15c. Hoist the last flue gas duct segment from the cantilever transfer platform to the top of the flue gas assembly layer by the hoisting device II. S15d. Weld the last flue gas duct segment to the flue gas duct segments on its two sides. S15e. Remove the traveling platform and the cantilever transfer platform at the bottom of the last flue gas duct segment. S15f. Assemble the ash hopper to the bottom of the last flue gas duct segment; remove the hoisting device II.

Images