Temporary rotating shaft used during closing-up of water cooling wall of dry bottom hopper of tower type furnace

Abstract

The utility model relates to a temporary rotating shaft for closing up a water cooling wall of a dry bottom hopper of a tower furnace, which comprises a plurality of rotating shaft components arranged at the bottom of a first component of a rigid beam, each rotating shaft component comprises a hanger plate fixed with the bottom of the first component of the rigid beam, the hanger plate is hinged with a lug plate through a pin shaft, and a leveling beam is fixed on one side of the lug plate. The number of the lifting plates of each rotating shaft assembly is two, and the lug plate penetrates between the two lifting plates and is hinged to the two lifting plates through a pin shaft. Pin shaft holes are correspondingly formed in the lifting plate and the lug plate, and the pin shafts are installed in the pin shaft holes. The rigid beam and the water cooling wall are combined separately and synchronously, continuous construction can be achieved, and the construction period is shortened; the hoisting risk is low; front and rear wall dry bottom hopper rigid beams and a dust hopper water cooling wall assembly are hung on a middle rigid beam of a first rigid beam assembly through a rotating shaft assembly, so that the truck crane has an operation space; a pin shaft in the water-cooled wall hanger is used as a rotating shaft, so that the opposite-pulling closing-up acting force is small, and the operation is easy; and the closed-up dry bottom hopper can be aligned with the side wall water wall pipe more accurately.

Description

Technical Field

[0001] This utility model relates to the field of lifting and hoisting technology, and in particular to a temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper. Background Technology

[0002] In recent years, the number of tower boilers with a capacity of one million kilowatts has been increasing in my country. During the installation of the water-cooled walls and ash hopper of the tower boiler, the furnace roof, superheaters, reheaters, and temperature regulating baffles are already fully installed and densely arranged inside the furnace. This makes it impossible for the tower crane hook to be lowered from inside the furnace, and the winch cannot be lowered from the furnace roof because there are no suitable load-bearing points inside the furnace for pulley system hoisting. Furthermore, the spiral section of the water-cooled wall has already been installed to a height of 20 meters, leaving limited space inside the furnace, making it impossible to use large hoisting machinery.

[0003] The conventional method involves assembling the rigid beams at the bottom of the furnace and the water-cooled spiral wall at 0 meters in the furnace, then hoisting them together using four winches. The disadvantages of this method are:

[0004] 1. During the assembly process, the furnace is 0 meters long and there is no space to use a truck crane, making it difficult to transport and assemble components.

[0005] 2. The assembled components are heavy and require the use of large winches for hoisting, which increases costs.

[0006] 3. Fixed pulley blocks have many reinforcement measures for their load-bearing points, but these measures also carry significant risks. Utility Model Content

[0007] This utility model aims to address the shortcomings of existing technologies by providing a temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper.

[0008] To achieve the above objectives, this utility model adopts the following technical solution:

[0009] A temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper includes several rotating shaft assemblies installed at the bottom of a first rigid beam assembly. Each rotating shaft assembly includes a hanging plate fixed to the bottom of the first rigid beam assembly. The hanging plate is hinged to an ear plate by a pin, and a leveling beam is fixed to one side of the ear plate.

[0010] Each shaft assembly has two hangers, with ear plates inserted between the two hangers and hinged together by pins.

[0011] The hanging plate and the ear plate are respectively provided with pin holes, and the pins are installed in the pin holes.

[0012] The beneficial effects of this utility model are: the rigid beam and water-cooled wall are assembled separately and simultaneously, allowing for continuous construction and saving construction time; the hoisting risk is small; the rigid beams of the front and rear wall cold ash hoppers and the water-cooled wall components of the ash hoppers are hung on the middle rigid beam of the first rigid beam component using a rotating shaft assembly, providing working space for the truck crane; the use of the pin shaft in the water-cooled wall hanging as a rotating shaft results in a small pulling force on the closing and easy operation; the alignment between the cold ash hopper and the side wall water-cooled wall pipes after closing is more precise. Attached Figure Description

[0013] Figure 1 This is the front view of the present invention;

[0014] Figure 2 This is the left view of the present invention;

[0015] Figure 3 This is a schematic diagram illustrating the use of this utility model;

[0016] In the diagram: 1-Rigid beam first assembly; 2-Spindle assembly; 3-Leveling beam; 4-Lifting pulley block; 5-Connecting lifting point; 6-Lifting sling; 7-Rigid beam second assembly; 8-Rigid beam third assembly; 9-Ash hopper water-cooled wall assembly;

[0017] 21-Hanging plate; 22-Pin; 23-Ear plate;

[0018] The following will describe in detail the embodiments of this utility model with reference to the accompanying drawings. Detailed Implementation

[0019] The principles and features of this utility model are described below with reference to the accompanying drawings. The embodiments described are for illustrative purposes only and are not intended to limit the scope of this utility model. The utility model is described more specifically in the following paragraphs by way of example with reference to the accompanying drawings. The advantages and features of this utility model will become clearer from the following description. It should be noted that the drawings are all in a very simplified form and use non-precise proportions, and are only used to facilitate and clarify the illustration of the embodiments of this utility model.

[0020] It should be noted that when a component is described as "fixed to" another component, it can be directly on the other component or may have a component in between. When a component is considered "connected to" another component, it can be directly connected to the other component or may have a component in between. When a component is considered "set on" another component, it can be directly set on the other component or may have a component in between. The terms "vertical," "horizontal," "left," "right," and similar expressions used in this document are for illustrative purposes only.

[0021] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains. The terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. The term "and / or" as used herein includes any and all combinations of one or more of the associated listed items.

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0023] like Figures 1 to 3 As shown, a temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper includes several rotating shaft assemblies 2 installed at the bottom of the first rigid beam assembly 1. Each rotating shaft assembly 2 includes a hanging plate 21 fixed to the bottom of the first rigid beam assembly 1. The hanging plate 21 is hinged to an ear plate 23 by a pin 22. A leveling beam 3 is fixed to one side of the ear plate 23.

[0024] Specifically, each pivot assembly 2 is installed at the bottom of the lowest middle rigid beam of the first rigid beam assembly 1.

[0025] The second rigid beam assembly 7 includes three lower rigid beams, the third rigid beam assembly 8 includes two lower rigid beams, and the ash hopper water-cooled wall assembly 9 is assembled in four parts.

[0026] Each shaft assembly has two hanging plates 21, and ear plates 23 are inserted between the two hanging plates 21 and hinged by pins 22.

[0027] The hanging plate 21 and the ear plate 23 are respectively provided with pin holes, and the pin 22 is installed in the pin holes.

[0028] The hanging plate 21 can be made of steel plate with a thickness of 10mm.

[0029] Ear plate 23 can be made of steel plate with a thickness of 20mm.

[0030] Pin 22 can be made from φ82mm round steel.

[0031] The ear plate 23 is a right trapezoidal structure with two parallel sides in the vertical direction and the right-angled side above the hypotenuse. The longer side of the two parallel sides is welded to the leveling beam 3 with a weld height of 12mm.

[0032] The hanging plate 21 is welded and fixed to the bottom of the first component 1 of the rigid beam, with a weld height of 10mm.

[0033] Based on the drawings of the ash hopper water-cooled wall assembly 9 and the rigid beam, the position of the rotating shaft assembly 2 is calculated. The hanging plate 21 is welded to the bottom of the middle rigid beam of the first rigid beam assembly 1. Two hanging plates 21 are welded to the corresponding positions of each leveling beam 3. The ear plate 23 is welded to the leveling beam 3. During hoisting, the ear plate 23 is inserted into the hanging plate 21 to ensure that the three pin holes are concentric, and then the pin 22 is inserted.

[0034] The installation scope of the cold ash hopper water-cooled wall includes the combined installation of the lower rigid beam of the furnace, the vertical tension plate of the cold ash hopper section, the spiral lower water-cooled wall, the lower header of the water-cooled wall, and the lower water-cooled wall seal. The rigid beam single-side wall is divided into three components, which are directly assembled inside the furnace: rigid beam component 1, rigid beam component 7, and rigid beam component 8. The rotating shaft component 2 is installed at the bottom of the lowest middle rigid beam of rigid beam component 1.

[0035] The leveling beam 2 at the inflection point is connected to the bottom of the lowest middle rigid beam of the first component 1 of the spiral water-cooled wall rigid beam via the rotating shaft assembly 2, and then hoisted into place.

[0036] The three lower rigid beams of the second rigid beam component 7 are combined with the leveling beam 3, and after being connected and fixed to the leveling beam 3, they are placed on the boiler operating platform.

[0037] The two lower rigid beams of the third rigid beam component 8 are combined with the leveling beam 3 and connected and fixed.

[0038] The vertical tension plate, spiral lower water-cooled wall, lower water-cooled wall header, and lower water-cooled wall seal of the ash hopper water-cooled wall assembly 9 are divided into four components on one side. After being transported to the furnace 0 meters away, the ash hopper water-cooled wall assembly 9 is hoisted onto the first rigid beam assembly 1, the second rigid beam assembly 7, and the third rigid beam assembly 8 using a truck crane and then connected and fixed.

[0039] Finally, the front and rear wall cold ash hoppers and water-cooled walls are joined together using four 10t winches. The hoisting pulley block 4 and sling 6 are connected to the connecting point 5 set on one side of the lower end of the leveling beam 3, and the joint is closed by pulling.

[0040] The sling 6 is made of φ21.5 steel wire rope.

[0041] This utility model allows for the separate and simultaneous assembly of rigid beams and water-cooled walls, enabling continuous construction and saving six days of construction time. It can be accomplished using a truck crane, a 10t winch, and small lifting equipment, with minimal lifting risks. The self-made rotating shaft assembly 2, after construction according to the drawings, ensures precise alignment between the cold ash hopper and the water-cooled wall pipes on the side wall.

[0042] This utility model uses a pivot assembly 2 to hang the front and rear wall cold ash hopper rigid beams and the ash hopper water-cooled wall assembly 9 on the middle rigid beam of the first rigid beam assembly 1, so that the truck crane has working space; the pin 22 in the water-cooled wall hanging is used as the pivot, which has a small pulling force and is easy to operate.

[0043] The present invention has been described above with reference to the accompanying drawings. Obviously, the specific implementation of the present invention is not limited to the above-described manner. Any improvements made using the inventive concept and technical solution of the present invention, or direct application to other situations without modification, are all within the protection scope of the present invention.

Claims

1. A temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper, characterized in that, It includes several pivot assemblies (2) installed at the bottom of the first rigid beam assembly (1), each pivot assembly (2) including a hanging plate (21) fixed to the bottom of the first rigid beam assembly (1), the hanging plate (21) being hinged to an ear plate (23) by a pin (22), and a leveling beam (3) being fixed to one side of the ear plate (23).

2. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 1, characterized in that, Each shaft assembly has two hanging plates (21), and ear plates (23) are inserted between the two hanging plates (21) and hinged by pins (22).

3. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 2, characterized in that, The hanging plate (21) and ear plate (23) are respectively provided with pin holes, and the pin (22) is installed in the pin holes.

4. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 3, characterized in that, The thickness of the hanging plate (21) is 10mm.

5. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 4, characterized in that, The thickness of the ear plate (23) is 20mm.

6. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 5, characterized in that, The diameter of the pin (22) is 82mm.

7. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 6, characterized in that, The ear plate (23) is a right trapezoidal structure with two parallel sides in the vertical direction and the right-angled side above the hypotenuse. The longer side of the two parallel sides is welded to the leveling beam (3) with a weld height of 12mm.

8. The temporary rotating shaft for closing the water-cooled wall of a tower furnace cold ash hopper according to claim 7, characterized in that, The hanging plate (21) is welded to the bottom of the first component (1) of the rigid beam, and the weld height is 10mm.

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