Damaged stirring flange repairing structure

Abstract

The utility model discloses a damaged stirring flange repairing structure which comprises two new flanges, the two new flanges are arranged above an original old flange A and below an original old flange B respectively, a plurality of bolt holes are formed in the new flanges, and the bolt holes correspond to holes in the original old flange A and holes in the original old flange B in position. Each new flange is composed of two half flanges which are symmetrically arranged, every two half flanges are combined into one new flange, the stirring shaft A or the stirring shaft B is clasped and fixedly connected with the stirring shaft A or the stirring shaft B, and the two new flanges, the original old flange A and the original old flange B are locked and fixed after long bolts penetrate through the two new flanges, the original old flange A and the original old flange B. According to the structure disclosed by the utility model, the original stirring structure does not need to be greatly disassembled and assembled, large hoisting equipment and a large number of disassembly and assembly personnel are not needed, and in-situ repair can be realized; meanwhile, it is guaranteed that the form and location tolerance of the repaired equipment is within the specified range; and the repair period is short, and equipment can be put into use in time.

Description

Technical Field

[0001] The utility model relates to a stirring device structure, in particular to a damaged stirring flange repairing structure. Background Art

[0002] Our company's high-silicon pre-desiliconization agitator tank has a diameter of 10.5 meters and a height of 28.5 meters. The agitator shaft consists of three sections, each with a diameter of 320 mm. The shaft and shaft ends are connected by flanges. The flanges and shaft ends are welded before the equipment is shipped, and their geometric tolerances are strictly controlled. The bolt holes in the flanges are drilled to ensure the overall coaxiality and other requirements of the equipment after installation. However, during operation, due to wear on the bottom bearing seat and resistance from accumulated material, the bolts on the upper flange were subjected to different forces, causing some bolts to shear off and the screw holes to suffer varying degrees of damage. Due to delayed discovery, the agitator shaft, with only two or three bolts connected, continued to oscillate repeatedly. The holes in the flanges were worn through and became elongated, eventually causing the agitator shaft to fall off, resulting in the tank sinking. There are two options for repairing the equipment: one is to purchase a new agitator shaft and reassemble it, which is costly and labor-intensive; the other is to dismantle the old equipment, return it to the factory for repair (due to insufficient machining equipment in the surrounding area), and then reinstall it. This method is time-consuming and expensive. Neither method can ensure timely commissioning of the equipment. Summary of the Invention

[0003] The purpose of this utility model is to provide a structure for repairing a damaged mixing flange. This structure does not require major disassembly or assembly of the original structure, does not require large-scale lifting equipment and a large number of disassembly and assembly personnel, can achieve on-site repair, and ensures that the shape and position tolerances of the repaired equipment are within the specified range. Furthermore, the repair period is short, allowing the equipment to be put into use in a timely manner.

[0004] The technical solution of the utility model is: a damaged stirring flange repair structure, comprising two new flanges, the two new flanges are respectively arranged above the original old flange A and below the original old flange B, a plurality of bolt holes are provided on the new flanges, and the bolt holes correspond to the hole positions on the original old flange A and the original old flange B, each new flange is composed of two symmetrically arranged half flanges, and each two half flanges are combined into one new flange and embrace the stirring shaft A or the stirring shaft B and are fixed thereto, and the two new flanges, the original old flange A and the original old flange B are locked and fixed after long bolts pass through them.

[0005] In the aforementioned damaged stirring flange repair structure, the new flange is symmetrically cut to form two half flanges, and the cutting line and the bolt hole are staggered.

[0006] In the aforementioned damaged stirring flange repair structure, the inner diameter of the new flange is 10 mm larger than the shaft diameter of the stirring shaft. Two half flanges are combined into one new flange and the stirring shaft A or the stirring shaft B is embraced, and then the inner hole is welded and fixed to the stirring shaft.

[0007] In the aforementioned damaged stirring flange repair structure, the new flange is fixed to the adjacent original old flange A or the original old flange B by welding.

[0008] In the aforementioned damaged stirring flange repair structure, the surface of the new flange is fixedly connected to the entire stirring shaft A or stirring shaft B via a plurality of ribs.

[0009] Beneficial effects of the present invention: Compared with the prior art, the present invention adds two new flanges, processes the two new flanges into four half flanges, and respectively sets the upper and lower parts of the two original old flanges. The new and old flanges are fixed together by long bolts, and the new flange is fixed to the stirring shaft at the same time, thereby realizing the repair of the damaged stirring flange structure, ensuring the strength of the repaired stirring structure and evenly transmitting torque, thereby ensuring the equipment operation rate. It can be applied to the situation where the stirring flange of a large tank is damaged. It has the advantages of fast repair, low cost and convenient installation. The structure does not require large-scale disassembly and assembly of the original stirring structure, does not require the use of large-scale lifting equipment and a large number of disassembly and assembly personnel, and can be repaired on site; at the same time, it ensures that the shape and position tolerances of the repaired equipment are within the specified range; and the repair period is short, ensuring that the equipment is put into use in a timely manner. BRIEF DESCRIPTION OF THE DRAWINGS

[0010] Figure 1 It is a structural diagram of the utility model;

[0011] Figure 2 This is a schematic diagram of the structure of a half flange.

[0012] Reference numerals: 1-new flange, 2-original flange A, 3-original flange B, 4-half flange, 5-bolt hole, 6-long bolt, 7-agitation shaft A, 8-agitation shaft B, 9-rib. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings and embodiments, but they are not intended to limit the present invention.

[0014] An embodiment of the present utility model: A damaged stirring flange repair structure, comprising two new flanges 1, one new flange 1 is arranged above the original old flange A2, and the other new flange 1 is arranged below the original old flange B3, and a plurality of bolt holes 5 are provided on the new flange 1, which correspond to the hole positions on the original old flange A2 and the original old flange B3. Each new flange 1 is composed of two symmetrically arranged half flanges 4, the upper two half flanges 4 are combined into one new flange 1 and embrace the stirring shaft A7 and are fixedly connected thereto, while the lower two half flanges 4 are combined into one new flange 1 and embrace the stirring shaft B8 and are fixed thereto, and the two new flanges 1, the original old flange A2 and the original old flange B3 are locked and fixed after passing through long bolts 6.

[0015] The new flange 1 is symmetrically cut to form two half flanges 4 , and the cutting line and the bolt hole 5 are staggered to ensure the integrity of the bolt hole 5 .

[0016] The inner hole diameter of the new flange 1 is 10 mm larger than the shaft diameter of the stirring shaft. After the two half flanges 4 are combined into one new flange 1 and the stirring shaft A7 or the stirring shaft B8 is embraced, the inner hole thereof is welded and fixed to the stirring shaft, that is, the upper two half flanges 4 are combined into one new flange 1 and the stirring shaft A7 is embraced, and the inner hole thereof is welded and fixed to the stirring shaft A7, while the lower two half flanges 4 are combined into one new flange 1 and the stirring shaft B8 is embraced, and the inner hole thereof is welded and fixed to the stirring shaft B8, thereby realizing a fixed connection between the new flange 1 and the stirring shaft.

[0017] The new flange 1 is welded and fixed to the adjacent original old flange A2 or original old flange B3, that is, the upper new flange 1 is welded and fixed to the original old flange A2 below it, and the lower new flange 1 is welded and fixed to the original old flange B3 above it, thereby strengthening the connection between the new flange 1 and the original old flange, so that the entire structure is better connected to form a whole.

[0018] The surface of the new flange 1 is fixedly connected to the stirring shaft A7 or the stirring shaft B8 via a plurality of ribs 9, that is, the top surface of the upper new flange 1 is fixedly connected to the stirring shaft A7 via a plurality of ribs 9, and the bottom surface of the lower new flange 1 is fixedly connected to the stirring shaft B8 via a plurality of ribs 9. This structure can strengthen the connection strength between the new flange 1 and the stirring shaft, so that the two are better fixed together, thereby better transmitting torque.

[0019] The utility model is formed based on the idea that firstly, no major disassembly or assembly is required, no large-scale lifting equipment or a large number of disassembly and assembly personnel are used, and the repair is done on site as much as possible; secondly, the shape and position tolerances of the repaired equipment are within the specified range; and thirdly, the repair period is short and the equipment is put into use in a timely manner.

[0020] First, measure the dimensions of the old flanges and fabricate two matching hollow new flanges 1. The aperture of the new flanges 1 is 10mm larger than the agitator shaft diameter. Each new flange 1 is then cut axially into two equal half flanges 4, avoiding the bolt holes 5 (to facilitate installation on the old flanges and securement to the agitator shaft).

[0021] Grind off burrs and raised parts of the old flange to ensure the flatness of the upper and lower joint surfaces of the old flange. Install the processed four half flanges 4 on the upper and lower sides of the two old flanges 2, and pass long screws 6 through the four flanges. Align and tighten them. Spot weld the new and old flanges diagonally. First, fix the new flange 1, then weld them along the circumference and weld them into a whole. Finally, weld the inner hole of the new flange 1 to the stirring shaft to ensure strength and uniform torque transmission, thereby ensuring the equipment operation rate.

Claims

1. A damaged stirring flange repair structure, characterized by: The invention comprises two new flanges (1), which are respectively arranged above the original flange A (2) and below the original flange B (3). A plurality of bolt holes (5) are arranged on the new flange (1), and the bolt holes (5) correspond to the positions of the holes on the original flange A (2) and the original flange B (3). Each new flange (1) is composed of two symmetrically arranged half flanges (4). Each two half flanges (4) are combined into one new flange (1) and hold the stirring shaft A (7) or the stirring shaft B (8) and are fixedly connected thereto. The two new flanges (1), the original flange A (2) and the original flange B (3) are locked and fixed after the long bolts (6) pass through them.

2. The damaged stirring flange repair structure according to claim 1, characterized in that: The new flange (1) is symmetrically cut to form two half flanges (4), and the cutting line and the bolt hole (5) are staggered.

3. The damaged stirring flange repair structure according to claim 1, characterized in that: The inner diameter of the new flange (1) is 10 mm larger than the shaft diameter of the stirring shaft. The two half flanges (4) are combined into one new flange (1) and the stirring shaft A (7) or the stirring shaft B (8) is held together. The inner diameter of the flange is then welded to the stirring shaft.

4. The damaged stirring flange repair structure according to claim 1, characterized in that: The new flange (1) is welded and fixed to the adjacent old flange A (2) or the old flange B (3).

5. The damaged stirring flange repair structure according to claim 1, characterized in that: The surface of the new flange (1) is fixedly connected to the entire body of the stirring shaft A (7) or the stirring shaft B (8) via a plurality of ribs (9).

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