Device for hoisting and mounting large-diameter flue gas pipeline

Abstract

The utility model provides a device for hoisting and installing a large-diameter flue gas pipeline, which comprises two layers of frame structures, a multifunctional hoisting and operating device is arranged on the first layer of frame, an electric hoisting device is arranged below the second layer of frame, and a transition platform is arranged to be flush with the first layer of frame in height. Through segmented hoisting, adjusting and welding of the flue gas pipeline, transportation of large-diameter and heavy flue gas pipelines is achieved, safety and reliability are achieved, the construction efficiency is improved, the construction quality is guaranteed, the technical problems of hoisting, assembling, welding and the like of the large-diameter flue gas pipelines in a limited space are solved, and the construction cost is reduced. And the method has important significance on ensuring the mounting quality and operation safety of the flue gas pipeline and even sintering engineering.

Description

TECHNICAL FIELD

[0001] The utility model relates to engineering construction technical field especially relates to a device for large diameter flue gas pipeline hoisting and installation. BACKGROUND

[0002] With the development of sintering engineering process and equipment, sintering machine gradually develops towards green, large-scale and intelligent, such as the current largest sintering machine sintering area reaches 720m 2 , and the size of flue gas pipeline matched with sintering engineering is also larger and larger, such as 720m 2 The diameter of flue gas pipeline matched with sintering machine reaches 6.5m.

[0003] The production, hoisting, installation and adjustment of large diameter flue gas pipeline are one of main technical difficulties, especially when the flue gas pipeline is installed in limited space and the flue gas pipeline connection is complex, it is more difficult.

[0004] For example, the main pipe of main flue gas pipeline in sintering cooling chamber is installed in the layer concrete frame structure with the height of main plant height + (7.1m-15.2m), the top of main pipe is connected with up to 60 wind box branch pipes with the diameter of about 1m, the bottom is connected with 18 ash hoppers with different sizes, and the two sides of flue gas pipeline are adjacent to main plant frame column and beam structure. For this kind of large diameter flue gas pipeline, the traditional method is to hoist the flue gas pipeline into the layer frame structure after being divided and coiled, and to splice and butt joint in the frame structure. This method is low in efficiency and high in construction cost, and the on-site splicing of flue gas pipeline is poor in forming and cannot guarantee the installation quality, and the construction personnel lack reliable stable operation platform when constructing, so that there are construction safety hazards. INVENTION CONTENTS

[0005] The utility model provides a device for large diameter flue gas pipeline hoisting and installation, which can realize the hoisting and installation of large diameter flue gas pipeline, especially the hoisting and installation operation of large diameter flue gas pipeline in limited space.

[0006] The technical scheme of the utility model is: a device for large diameter flue gas pipeline hoisting and installation, comprising frame structure, transition platform and multifunctional hoisting and operation device.

[0007] The frame structure comprises two layers, which are first layer frame and second layer frame, the second layer frame is located on the first frame, the height of first layer frame is greater than the height of sintering cooling chamber, the height of second layer frame is greater than the height of first layer frame, and the height difference between second layer frame and first layer frame is greater than the diameter of flue gas pipeline, and the lower steel beam is arranged on the second layer frame, and the electric hoisting device is installed below the lower steel beam.

[0008] The transition platform is fixedly connected with the first layer frame, and the height of the transition platform is flush with the height of the first layer frame; two parallel upper steel beams are laid along the hoisting direction on the first layer frame and the transition platform, denoted as a first upper steel beam and a second upper steel beam, a first track is laid on the first upper steel beam, and a second track is laid on the second upper steel beam, the first track is parallel to the second track; a plurality of supports for supporting the flue gas pipeline are arranged between the first upper steel beam and the second upper steel beam, there is a spacing between adjacent supports, and the supports are parallel to each other;

[0009] The electric hoisting device can move along the length direction parallel to the first track and can move up and down along the length direction perpendicular to the first track;

[0010] The multifunctional hoisting and operation device is arranged between the first concrete frame and the second concrete frame and has a height greater than the diameter of the flue gas pipeline, and includes at least two first bases arranged on the first track and at least two second bases arranged on the second track, the bottom of each first base is provided with a roller and can move along the first track, and the bottom of each second base is provided with a roller and can move along the second track.

[0011] Each first base is provided with a first vertical column, each second base is provided with a second vertical column, the first vertical columns are connected by a first cross beam, the second vertical columns are connected by a second cross beam, and the first cross beam and the second cross beam are connected by at least two main cross beams.

[0012] As an implementation manner, the transition platform includes a steel beam, a steel column, and a platform plate, the steel beam and the steel column form a right angle for supporting the platform plate, and the platform plate is flush with the height of the first layer frame structure.

[0013] The frame structure material is not limited, for example, can be concrete, steel material, etc., and can be selected according to the mass of the flue gas pipeline to have a material to enable the frame structure to have the ability to support the flue gas pipeline.

[0014] As preferred, the steel column adopts a steel pipe column.

[0015] As preferred, the steel beam adopts an H-shaped steel.

[0016] As preferred, the platform plate adopts a patterned steel plate.

[0017] As preferred, the first track, the first vertical columns, and the first cross beam form a trapezoidal structure, and more preferably an isosceles trapezoidal structure.

[0018] As preferred, the second track, the second vertical columns, and the second cross beam form a trapezoidal structure, and more preferably an isosceles trapezoidal structure.

[0019] As a structure, a personnel passage is arranged on the first cross beam.

[0020] As a structure, a welding platform is arranged on the main cross beam. As a preference, the welding platform adopts a telescopic support for adjusting the height of the welding platform, which can be adjusted according to the position of the butt joint of the flue gas pipeline section.

[0021] As a structure, an electric hoisting device, such as an electric winch, is arranged on the main cross beam, which can be used for fine adjustment of the position of the flue gas pipeline section. As a preference, a hook is hung on the electric winch. Considering that the diameter of the flue gas pipeline is large and the weight is heavy, the flue gas pipeline section may be eccentrically unstable when hoisted on the first upper steel beam and the second upper steel beam, and the first upper steel beam and the second upper steel beam are preferably reinforced, and a plurality of connecting pieces are arranged between the first upper steel beam and the second upper steel beam, so that the first upper steel beam and the second upper steel beam are connected as a whole. As a further preference, one connecting piece is installed between the first upper steel beam and the second upper steel beam at an interval of 1m-5m.

[0022] The method for hoisting and installing a large-diameter flue gas pipeline by using the device of the utility model comprises the following steps:

[0023] (1) The flue gas pipeline is divided into a plurality of sections along the length direction, and the minimum length of each section is L 烟气管道min , the maximum length is L 烟气管道max , and the maximum weight of each section is M 烟气管道max ;

[0024] A transition platform is designed according to M 烟气管道max , so that the weight that the transition platform can bear is greater than M 烟气管道max ;

[0025] Each support is hoisted to the space between the first upper steel beam and the second upper steel beam and is installed, and the minimum interval between adjacent supports is L 支座min , L 烟气管道min ≥ L 支座min , that is, it is ensured that each flue gas pipeline section is supported by at least one support;

[0026] The supports on the first layer frame corresponding to each flue gas pipeline section are designated (that is, according to the length of the flue gas pipeline section, the corresponding supports can be one or more than two, each flue gas pipeline section is hoisted to the corresponding support, and there is a gap between adjacent flue gas pipeline sections for welding);

[0027] The transition platform is assembled on the frame structure, the multifunctional hoisting and operation device is assembled on the transition platform, and the multifunctional hoisting and operation device is moved along the first track and the second track to the initial position;

[0028] (2) using a crane to hoist a certain flue gas pipeline segment to a support located on the transition platform, and then using the crane and the automatic hoisting device to hoist the flue gas pipeline segment to a corresponding support located on the first layer frame;

[0029] (3) repeating step (2) to hoist at least two adjacent flue gas pipeline segments to corresponding supports on the first layer frame;

[0030] Then, the multifunctional hoisting and working device is moved along the track to between the adjacent flue gas pipeline segments, the welding platform is adjusted in position by the worker entering the welding platform through the personnel passage, and the butt welds of the adjacent flue gas pipeline segments are welded.

[0031] As preferred, in step (3), the multifunctional hoisting and working device is first moved along the first track and the second track to the position of the flue gas pipeline segment, the flue gas pipeline segment is hoisted by the electric hoist for fine adjustment of the position, the fine adjustment of the position of at least two adjacent flue gas pipeline segments is completed by repeating the step, then the multifunctional hoisting and working device is moved along the first track and the second track to between the adjacent flue gas pipeline segments, the welding platform is adjusted in position by the worker entering the welding platform through the personnel passage, and the butt welds of the adjacent flue gas pipeline segments are welded.

[0032] As an implementation manner, two outer lifting lugs and two inner lifting lugs are arranged on each flue gas pipeline segment, and step (2) is as follows:

[0033] (2-1) the crane connects the two outer lifting lugs through two outer steel wires and connects the two inner lifting lugs through two inner steel wires, and hoists the flue gas pipeline segment to the transition platform by the crane, and the two inner lifting lugs are close to the frame structure;

[0034] (2-2) the crane is hooked back (i.e., the crane hook head is lowered, and the flue gas pipeline segment is lowered to a designated position), the connection with the two inner steel wires is removed, and the two inner steel wires are hung on the electric hoisting device, at this time, the crane and the electric hoisting device hoist the outer lifting lugs and the inner lifting lugs of the flue gas pipeline segment, respectively;

[0035] (2-3) the flue gas pipeline is hoisted by the crane and the electric hoisting device to the corresponding support on the first concrete frame, after the crane hoisting reaches the limit due to the contact of the outer steel wire with the concrete frame, the crane and the electric hoisting device are hooked back, and the two outer steel wires are removed from the crane and hung on the electric hoisting device; then the electric hoisting device hoists the flue gas pipeline segment and transports it to the corresponding support on the first concrete frame.

[0036] As preferred, the flue gas pipeline segment is segmented according to parameters such as diameter and wall thickness.

[0037] As a preference, a heat exchanger is arranged near the middle of the sintering cooling chamber. As a preferred implementation, the flue gas pipeline is segmented towards both ends with the heat exchanger as the fixed point.

[0038] For the convenience of the welding of the welding joints, the butt welding joints of the flue gas pipeline segments are at least 1 m away from the support.

[0039] If an under-machine ash chute is arranged below a flue gas pipeline segment, after the installation of the flue gas pipeline segment is completed, the under-machine ash chute is lifted and installed to the designated position below the flue gas pipeline segment by the multifunctional hoisting and working device, and is fixed.

[0040] If the flue gas pipeline is provided with a wind box branch pipe, after the welding of all the flue gas pipeline segment groups is completed, the wind box branch pipe is hoisted to the designated position of the flue gas pipeline by the second concrete frame, the inverted chain and the electric hoisting device, and is hole-welded.

[0041] As a preference, after the welding of all the flue gas pipeline segments, the under-machine ash chute and the wind box branch pipe is inspected and accepted, the multifunctional hoisting and working device, the first track, the second track, the first upper steel beam, the second upper steel beam, the electric hoisting device and the lower steel beam are removed, and the internal refractory construction and the external insulation construction of the pipeline are carried out.

[0042] As a preference, in the step (1), when the flue gas pipeline is segmented, based on the hoisting mechanical requirements, the weight of each segment is preferably 5 t-10 t.

[0043] In the step (2), when the first frame structure is constructed, the embedded parts are reserved on the concrete frame columns or frame beams at the corresponding positions of the transition platform.

[0044] In the step (1), the guardrails and safety ropes are arranged on both sides of the platform plate and the first concrete frame.

[0045] In the step (1), the first track and the second track adopt the U43 type, and when installed, the height difference between the two tracks on the same load surface is strictly controlled to be not more than 3 mm, and the offset of the upper, left and right three sides at the joint is not more than 1 mm.

[0046] In the step (2), before the flue gas pipeline segment module is hoisted, a traction rope is arranged on the side wall thereof to adjust the orientation of the flue gas pipeline segment during hoisting.

[0047] As a preference, the lifting hook adopts an automatic unhooking device.

[0048] As a preference, in the step (2), four jacks are arranged on the four columns to correct the elevation and center line of the flue gas pipeline segment.

[0049] Compared with the prior art, the utility model discloses two layer frame structures, the multifunctional hoisting and operation device is arranged on the first layer frame, the electric hoisting device is arranged below the second layer frame, the transition platform height is set to be flush with the first layer frame, the transportation of the large diameter and heavy flue gas pipeline is realized through the sectional hoisting, adjustment and welding of the flue gas pipeline, the safety is reliable, the construction efficiency is improved, the construction quality is guaranteed, the hoisting, assembling and welding of the large diameter flue gas pipeline in the limited space are solved, and the installation quality and operation safety of the flue gas pipeline and even the sintering project are guaranteed. BRIEF DESCRIPTION OF DRAWINGS

[0050] Figure 1 It is the schematic diagram that the crane hoists the flue gas pipeline section.

[0051] Figure 2 It is the schematic diagram that the crane hoists the flue gas pipeline section to the transition platform.

[0052] Figure 3 It is the schematic diagram that the crane hoists the flue gas pipeline section to the transition platform limit position and switches part of the lifting point to the automatic hoisting device, and the crane and the automatic hoisting device jointly hoist the flue gas pipeline section.

[0053] Figure 4 It is the schematic diagram that the automatic hoisting device hoists the flue gas pipeline section.

[0054] Figure 5 It is the schematic diagram that the first and second flue gas pipeline sections are assembled and welded.

[0055] Figure 6 It is the structural schematic diagram of the multifunctional hoisting and operation device.

[0056] Figures 1-6 The reference signs in the drawings are: first layer frame 1, second layer frame 2, transition platform 3, steel column 3-1, steel beam 3-2, platform plate 3-3, first upper steel beam 4-1, second upper steel beam 4-2, first rail 5-1, second rail 5-2, lower steel beam 6, flue gas pipeline section 7, outer lifting lug 7-1, inner lifting lug 7-2, crane 8, multifunctional hoisting and operation device 9, first base 9-1-1, second base 9-1-2, first vertical column 9-2-1, second vertical column 9-2-2, first cross beam 9-3-1, second cross beam 9-3-2, main cross beam 9-4, personnel passageway 9-5, welding platform 9-6, electric hoist 9-7, lifting hook 9-8, electric hoisting device 10, support 11. DETAILED DESCRIPTION

[0057] The embodiments of the present application are further described below with reference to the drawings, examples of which are shown in the drawings. The same or similar elements are denoted by the same or similar reference signs throughout the drawings. The embodiments described below by reference to the drawings are exemplary and are intended to explain the present application, and should not be understood as limiting the present application. Any modification, equivalent replacement or improvement made within the spirit and principle of the present application should be included in the scope of the claims of the present application. The details not described in the present application are well-known technologies.

[0058] As shown in Figure 2 , 5 , the device for hoisting and installing large-diameter flue gas ducts comprises a frame structure, a transition platform 3 and a multifunctional hoisting and operating device 9. The frame structure has two layers, denoted as a first layer frame 1 and a second layer frame 2. The second layer frame 2 is located on the first layer frame 1. The first layer frame 1 is made of concrete, and the second layer frame 2 is also made of concrete. The height of the first layer frame 1 is the height of the sintering cooling chamber + 7.1 m, and the height of the second layer frame 2 is the height of the sintering cooling chamber + 14.2 m.

[0059] A lower steel beam 6 is arranged below the second layer frame 2. An electric hoisting device 10 is installed below the lower steel beam 6.

[0060] The transition platform 3 is fixedly connected with the first layer frame 1, and the height of the transition platform 3 is flush with the height of the first layer frame 1, forming an extension of the first layer frame 1 in the hoisting direction. Two parallel upper steel beams, denoted as a first upper steel beam 4-1 and a second upper steel beam 4-2, are arranged on the first layer frame 1 and the transition platform 3 along the hoisting direction. A first track 5-1 is arranged on the first upper steel beam 4-1, and a second track 5-2 is arranged on the second upper steel beam 4-2. The first track 5-1 is parallel to the second track 5-2. A plurality of supports 11 for supporting the flue gas duct section 7 are arranged between the first upper steel beam 4-1 and the second upper steel beam 4-2. There is a spacing between adjacent supports 11, and each support 11 is parallel to each other.

[0061] The electric hoisting device 10 can move along the length direction parallel to the first track 5-1 and can move up and down along the length direction perpendicular to the first track 5-1.

[0062] The multi-functional hoisting and operating device 9 comprises at least two first bases 9-1-1 arranged on the first track 5-1 and at least two second bases 9-1-2 arranged on the second track 5-2. The bottom of each first base 9-1-1 is provided with a roller and is movable along the first track 5-1. The bottom of each second base 9-1-2 is provided with a roller and is movable along the second track 5-2. Each first base 9-1-1 is provided with a first vertical column 9-2-1, each second base 9-1-2 is provided with a second vertical column 9-2-2, the first vertical columns 9-2-1 are connected by a first cross beam 9-3-1, the second vertical columns 9-2-2 are connected by a second cross beam 9-3-2, and the first cross beam 9-3-1 and the second cross beam 9-3-2 are connected by at least two main cross beams 9-4.

[0063] In the embodiment, the transition platform 3 is a steel structure frame platform, which comprises steel columns 3-1, steel beams 3-2 and a platform plate 3-3. The steel beams 3-2 and the steel columns 3-1 form a right angle and are used to support the platform plate 3-3. The platform plate 3-3 is flush with the height of the first layer frame structure.

[0064] The steel columns 3-1 are steel pipe columns. The steel beams 3-2 are H-shaped steel. The platform plate 3-3 is a patterned steel plate.

[0065] In the embodiment, the first track 5-1, the first vertical columns 9-2-1 and the first cross beam 9-3-1 form an isosceles trapezoid.

[0066] In the embodiment, the second track 5-2, the second vertical columns 9-2-2 and the second cross beam 9-3-2 form an isosceles trapezoid.

[0067] A personnel passage 9-6 is arranged on the first cross beam 9-3-1. A welding platform 9-6 and an electric hoist 9-7 are arranged on the main cross beam 9-4. A hook 9-8 is hung on the electric hoist 9-7. The welding platform 9-6 adopts an extendable support, and the height of the welding platform 9-6 can be adjusted according to the position of the butt joint of the flue gas pipeline section 7.

[0068] When the device is used to hoist and install the flue gas pipeline with a diameter of 6.5 m in the sintering cooling chamber, the following steps are included:

[0069] (1) A two-layer concrete frame is established in the sintering cooling chamber. The height of the first concrete frame 1 is the height of the sintering cooling chamber + 7.1 m, and the height of the second layer frame 2 is the height of the sintering cooling chamber + 15.2 m.

[0070] According to the diameter, wall thickness and other parameters of the flue gas pipeline, the flue gas pipeline is divided into several sections. In the embodiment, the heat exchanger is arranged in the middle of the sintering cooling chamber. Taking the heat exchanger as a fixed point, the flue gas pipeline is segmented towards both ends. The minimum length of each section is L 烟气管道min , and the maximum length is L 烟气管道max, the maximum weight in each section is M 烟气管道max ;

[0071] According to M 烟气管道max The transition platform 3 is designed to withstand a weight greater than M 烟气管道max , and the length of the steel beam is L 烟气管道max 1 / 2-2 / 3;

[0072] Each support 11 is hoisted between the first upper steel beam 4-1 and the second upper steel beam 4-2 and installed, and the minimum distance between adjacent supports 11 is L 支座min , L 烟气管道min ≥ L 支座min , that is, to ensure that each flue gas pipeline section 7 is supported by at least one support 1;

[0073] Each flue gas pipeline section 7 is assigned a support 11 on the first layer frame 1, that is, according to the length of the flue gas pipeline section 7, its corresponding support 11 may be one or more, each flue gas pipeline section 7 will be hoisted to the corresponding support 11, and there is a gap between adjacent flue gas pipeline sections 7 for welding, in this embodiment, the distance between the butt welding of certain adjacent flue gas pipeline 7 and the corresponding support 11 of the adjacent flue gas pipeline 7 is at least 1m.

[0074] The transition platform 3 is assembled on the frame structure, the multifunctional lifting and working device 9 is assembled on the transition platform 3, and the multifunctional lifting and working device 9 is moved along the track to the initial position;

[0075] (2) Hoist a certain flue gas pipeline section to the support 11 located on the transition platform 3 using the crane 8, and then hoist the flue gas pipeline section 7 to the corresponding support 11 located on the first layer frame 1 using the crane 8 and the automatic lifting device 10;

[0076] (3) Repeat step (2) to hoist at least two adjacent flue gas pipeline sections to the corresponding supports 11 of the flue gas pipeline sections 7 on the first layer frame 1;

[0077] Move the multifunctional lifting and working device 9 along the first track 5-1 and the second track 5-2 to the adjacent flue gas pipeline sections 7, and the workers enter the welding platform 9-6 through the personnel passage 9-5, adjust the position of the welding platform, and weld the butt weld of the adjacent flue gas pipeline sections 7.

[0078] In this embodiment, each flue gas pipeline section 7 is provided with two outer lifting lugs 7-1 and two inner lifting lugs 7-2, and the step (2) is as follows:

[0079] (2-1) The crane 8 is connected with the outer lifting lug 7-1 through two outer steel wires 8-1 and connected with the inner lifting lug 7-2 through two inner steel wires 8-2, and the crane 8 is used to hoist the flue gas pipeline section 7 to the transition platform 3, and the two inner lifting lugs 7-2 are close to the frame structure;

[0080] (2-2) The crane 8 is hooked and the connection with the two inner steel wires 8-2 is removed, and the two inner steel wires 8-2 are hung on the electric hoisting device 10, at this time the crane 8 and the electric hoisting device 10 respectively hoist the outer lifting lug 7-1 and the inner lifting lug 7-2 of the flue gas pipeline section 7.

[0081] (2-3) The crane 8 and the electric hoisting device 10 are used to lift and hoist the flue gas pipeline 7 to the limit, then the crane 8 and the electric hoisting device 10 are hooked, and the two outer steel wires 8-2 are removed from the crane 8 and hung on the electric hoisting device 10; then the electric hoisting device 10 is used to hoist the flue gas pipeline section 7 and transport it to the specified corresponding support 11.

[0082] In this embodiment, the machine under ash bucket is arranged below the flue gas pipeline section 7, after the installation of the flue gas pipeline section 7 is completed, the multifunctional hoisting and working device 9 is used to lift and install the machine under ash bucket to the specified position below the flue gas pipeline section 7, and then fixed.

[0083] In this embodiment, if the flue gas pipeline is provided with a wind box branch pipe, after all the flue gas pipeline sections 7 are assembled and welded, the second concrete frame 2 is used to hang the chain and cooperate with the electric hoisting device 10 to hoist the wind box branch pipe to the specified position of the flue gas pipeline, and then the hole is welded.

[0084] In this embodiment, after all the welding seams of the flue gas pipeline sections, the machine under ash bucket and the wind box branch pipe are detected and accepted, the multifunctional hoisting and working device 9, the first track 5-1, the second track 5-2, the first upper steel beam 4-1, the second upper steel beam 4-2, the electric hoisting device 10 and the lower steel beam 6 are removed, and the internal refractory construction and the external insulation construction of the pipeline are carried out.

[0085] In this embodiment, when the flue gas pipeline is segmented, based on the hoisting mechanical requirement, the weight of each flue gas pipeline section is 5t-10t.

[0086] In step 1 of this embodiment, if part of the stiffening ribs of the flue gas pipeline section 7 collides with the concrete frame, the stiffening ribs of the flue gas pipeline section 7 are partially reserved and not installed, and temporary supports are arranged inside the flue gas pipeline section 7 for reinforcement.

[0087] In step 2 of this embodiment, when the +7.1m concrete frame structure 1 at the head of the sintering and cooling chamber is constructed, the embedded parts are reserved on the concrete frame column or frame beam at the corresponding position of the transition platform 3.

[0088] In the embodiment, guardrails and safety ropes are arranged on both sides of the platform plate 3-3 and the first concrete frame 1.

[0089] In the embodiment, the first track 5-1 and the second track 5-2 adopt the U43 type, and during installation, the height difference between the two tracks on the same load surface is strictly controlled to be no more than 3 mm, and the offset of the upper, left and right three surfaces at the joint is no more than 1 mm.

[0090] In the embodiment, before hoisting the flue gas pipeline section 7, a traction rope is arranged on the side wall of the flue gas pipeline section 7 to adjust the orientation of the flue gas pipeline section during hoisting through the traction rope.

[0091] In the embodiment, the welding platform 9-6 adopts a telescopic support, and the height of the welding platform 9-6 can be adjusted according to the position of the butt joint of the flue gas pipeline section 7.

[0092] In the embodiment, the lifting hook 9-8 adopts an automatic unhooking device.

[0093] In the embodiment, four jacks are arranged on the four vertical columns 9-2 to correct the elevation and center line of the flue gas pipeline section 7.

[0094] In the embodiment, before hoisting the flue gas pipeline section 7 by the multifunctional hoisting and operation device 9, a horizontal support is installed between the first upper steel beam 4-1 and the second upper steel beam 4-2 at an interval of 2 m.

[0095] In the embodiment, when the wind box branch pipe is butt jointed with the flue gas pipeline section 7, the welding platform 9-6 is also used for welding.

[0096] The above-described embodiments have described the technical solutions of the utility model in detail, and it should be understood that the above-described only for the specific embodiments of the utility model, and is not used to limit the utility model, any modification, supplement or similar way of substitution, etc. made in the principle range of the utility model should be included in the protection range of the utility model.

Claims

1. A device for hoisting and installing large diameter flue gas ducts, characterized in that: The frame structure, the transition platform and the multifunctional hoisting and working device are provided. The frame structure comprises two layers, namely a first layer frame and a second layer frame, the second layer frame is located on the first layer frame, the height of the first layer frame is greater than the height of the sinter cooling chamber, the height of the second layer frame is greater than the height of the first layer frame, and the height difference between the second layer frame and the first layer frame is greater than the diameter of the flue gas pipeline; the second layer frame is provided with a lower steel beam, and an electric hoisting device is installed below the lower steel beam; The transition platform is fixedly connected with the first layer frame, and the height of the transition platform is flush with the height of the first layer frame; two parallel upper steel beams, namely a first upper steel beam and a second upper steel beam, are laid on the first layer frame and the transition platform along the hoisting direction; a first track is laid on the first upper steel beam, a second track is laid on the second upper steel beam, and the first track is parallel to the second track; a plurality of supports for supporting the flue gas pipeline are arranged between the first upper steel beam and the second upper steel beam, and there is a spacing between adjacent supports, and the supports are parallel to each other; The electric hoisting device can move along the length direction parallel to the first track and move up and down along the length direction perpendicular to the first track; The multifunctional hoisting and working device is arranged between the first concrete frame and the second concrete frame and has a height greater than the diameter of the flue gas pipeline, and comprises at least two first bases arranged on the first track and at least two second bases arranged on the second track, the bottom of each first base is provided with a roller and can move along the first track, and the bottom of each second base is provided with a roller and can move along the second track; Each first base is provided with a first stand, each second base is provided with a second stand, the first stands are connected by a first cross beam, the second stands are connected by a second cross beam, and the first cross beam and the second cross beam are connected by at least two main cross beams.

2. The apparatus of claim 1 wherein: The transition platform is a steel structure frame platform, comprising a steel beam, a steel column and a platform plate, the steel beam and the steel column form a right angle for supporting the platform plate, and the platform plate is flush with the height of the first layer frame structure.

3. The apparatus of claim 1 wherein: The material of the frame structure is concrete or steel.

4. The apparatus of claim 2 wherein: The steel column adopts a steel pipe column. As a preferred, the steel beam adopts an H-shaped steel. As a preferred, the platform plate adopts a patterned steel plate.

5. The apparatus of claim 1 wherein: The first track, the first stands and the first cross beam form a trapezoidal structure, preferably an isosceles trapezoid.

6. The apparatus of claim 1 wherein: The second track, the second stands and the second cross beam form a trapezoidal structure, preferably an isosceles trapezoid.

7. The apparatus of claim 1 wherein: A personnel passage is arranged on the first cross beam.

8. The apparatus of claim 1 wherein: A welding platform is arranged on the main cross beam, the welding platform adopts an extendable support for adjusting the height of the welding platform.

9. The apparatus of claim 1 wherein: An electric hoisting device is arranged on the main cross beam, which can be used for fine adjustment of the position of the flue gas pipeline section.

10. The apparatus of any one of claims 1 to 9, wherein: A plurality of connecting pieces are arranged between the first upper steel beam and the second upper steel beam. As a preferred, one connecting piece is arranged between the first upper steel beam and the second upper steel beam at an interval of 1m-5m.

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