Manufacturing process of an annular material retaining structure of bucket wheel body of bucket wheel stacker and reclaimer

Abstract

The present invention relates to the technical field of conveying machinery, and discloses a manufacturing process of an annular retaining structure of a bucket wheel body of a bucket wheel stacker reclaimer. According to the overall bending angle and plate thickness of the wear-resistant plate, the wear-resistant plate is divided into three part plates along the circumferential direction of the annular retaining structure, and the parts are bent separately, thereby avoiding the need to cut the wear-resistant plate into many small part plates for assembly and welding; a waist-shaped hole is designed on the thin back plate that fits the wear-resistant plate, and continuous fillet welds are used between the wear-resistant plate and the thin back plate at the waist-shaped hole, as well as between the periphery of each wear-resistant plate and the thin back plate, thereby avoiding intermittent welding between the wear-resistant plate and the back plate. The present invention optimizes the manufacturing process of the annular retaining structure, reduces the workload of cutting and assembling the wear-resistant plate part plates, reduces manufacturing costs, reduces welding deformation, ensures the finished size of the annular retaining structure, and also avoids the problem of forming a non-enclosed gap area between the wear-resistant plate and the back plate due to intermittent welding, making it impossible to carry out anti-corrosion construction such as painting, thereby affecting the service life of the structure.

Description

Technical Field

[0001] The invention relates to the technical field of conveying machinery, and in particular to a manufacturing process of an annular material blocking structure of a bucket wheel body of a bucket wheel stacker and reclaimer. Background Art

[0002] The annular material retaining structure 101 of the bucket wheel body of the bucket wheel stacker reclaimer is installed on the inner side of the bucket wheel body 102. Figure 1 The original design of the annular material retaining structure of the bucket wheel body of a bucket wheel stacker is as shown in FIG. Figure 2-4 As shown, the 12mm thick wear-resistant plate needs to be cut into 194mm wide blocks 103 / 104 / 105, a total of 156 small wear-resistant plates, and then intermittently welded on the 6mm thick back plate 6. Because the back plate is thin, the welding amount of the 156 block wear-resistant plates is large, which is easy to cause the overall deformation of the annular retaining structure 101. This deformation correction is very difficult, thus affecting the rotation operation of the bucket wheel body 102 after installation; at the same time, intermittent welding is prone to end arc pit defects, which need to be repaired; and the cutting and assembly workload of the 156 block wear-resistant plates is large; in addition, intermittent welding is used between the wear-resistant plate and the back plate, so that a non-enclosed gap area is formed between the wear-resistant plate and the back plate, and anti-corrosion construction such as painting cannot be carried out in this area, affecting the service life of the structure. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a manufacturing process for an annular material retaining structure of a bucket wheel body which can reduce welding deformation, avoid end arc pit defects and increase the service life of the structure.

[0004] In order to solve the above technical problems, the present invention provides a manufacturing process of an annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer, comprising the following steps:

[0005] 1. Parts plate processing

[0006] According to the overall bending angle and thickness of the wear-resistant plate, the wear-resistant plate is cut along the circumferential direction of the annular retaining structure;

[0007] A waist-shaped hole is provided on the back plate which is in contact with the wear-resistant plate;

[0008] 2.Structure production

[0009] Position the back plate on the concave arc-shaped tire frame, assemble the transverse and longitudinal reinforcement ribs on the concave side of the back plate, and flip the assembled back plate 90° sideways; lift the assembled back plate to the horizontal tire frame, assemble the wear-resistant plate on the back plate, flip the back plate 90° sideways, and lift it to the concave arc-shaped tire frame; weld the waist-shaped hole fillet weld between the wear-resistant plate and the back plate, and weld the welds between the transverse and longitudinal reinforcement ribs and the back plate. After welding, flip the back plate 90° sideways and lift it to the horizontal tire frame; weld the remaining welds between the wear-resistant plate and the back plate.

[0010] Furthermore, when the part plate is processed, the wear-resistant plate is divided into three part plates along the circumferential direction of the annular retaining structure, and the parts are bent separately. The thickness of the wear-resistant plate is 12 mm.

[0011] Furthermore, the wear-resistant plate and the back plate at the waist-shaped hole adopt continuous fillet welds, and the back plate is 6 mm thick.

[0012] Furthermore, a continuous fillet weld is used between the periphery of each cut wear-resistant plate and the back plate.

[0013] Furthermore, when the structure is manufactured, the fillet welds of the waist-shaped holes between the wear-resistant plate and the back plate are welded in an alternating order of the welds on the middle part plate and the welds on the two end part plates.

[0014] Furthermore, when the back plate equipped with the wear-resistant plate is hoisted to the concave arc-shaped tire frame, the wear-resistant plate faces the concave arc-shaped tire frame to ensure that the arc surface of the concave arc-shaped tire frame fits the contact surface of the wear-resistant plate.

[0015] Furthermore, after the remaining welds are welded, the bolt holes on the annular material retaining structure are drilled based on the bolt holes for connecting the wear-resistant plates on both sides.

[0016] Compared with the original production process, the present invention has the following beneficial effects:

[0017] 1. The present invention divides the 12mm thick wear-resistant plate from the original 156 pieces into three parts plates along the circumferential direction of the annular retaining structure, and rolls them into circles, thereby reducing the workload of cutting and assembling the wear-resistant plate parts plates; a waist-shaped hole is designed on the 6mm back plate that fits the wear-resistant plate, and a continuous fillet weld is used between the wear-resistant plate and the back plate at the waist-shaped hole, and a continuous fillet weld is used between the periphery of each wear-resistant plate and the back plate, which reduces the welding deformation as a whole, reduces the manufacturing cost, and ensures the finished size of the annular retaining structure. At the same time, it avoids the problem of end arc pit defects and rework caused by intermittent welding, and avoids the problem of non-enclosed gap area between the wear-resistant plate and the back plate caused by intermittent welding, which makes it impossible to carry out anti-corrosion construction such as painting, thereby improving the service life of the structure.

[0018] 2. A waist-shaped hole is opened on the back plate, and a continuous fillet weld is used between the wear-resistant plate and the back plate at the waist-shaped hole to avoid bulging in the middle caused by welding only the four sides to the back plate and leaving a hollow fitting area in the middle.

[0019] 3. The wear-resistant plate is divided into three parts along the circumferential direction of the annular retaining structure. The cutting length is reduced by 83.3% compared with 156 small wear-resistant plates, reducing the labor of manual cutting. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the background technology of the present invention, in which an annular material retaining structure 101 is installed inside a bucket wheel body 102 .

[0021] Figure 2 This is a schematic diagram of blocks cut from a wear-resistant plate according to the background technology of the present invention.

[0022] Figure 3 , 4 This is a schematic diagram of the distribution of wear-resistant plates in the background technology of the present invention.

[0023] Figure 5 It is a schematic diagram of the wear-resistant plate part plate of the present invention.

[0024] Figure 6 Schematic diagram of the backplane of the present invention.

[0025] Figure 7 , 8 It is a schematic diagram of the welding requirements of the component plate and the back plate of the present invention.

[0026] Fig. 9 , 10 It is a schematic diagram of the welding sequence of the fillet weld of the waist-shaped hole 110 of the present invention.

[0027] Fig.11 It is a schematic diagram of the structure after the wear-resistant plate and the back plate are welded in the present invention.

[0028] In the figure, 101. annular material retaining structure, 102. bucket wheel body, 103-105. block, 106. back plate, 107-109. part plate, 110. waist-shaped hole. Implementation

[0029] A manufacturing process of an annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer, comprising the following steps:

[0030] 1. Parts plate processing

[0031] like Figure 5 As shown, according to the overall bending angle and thickness of the wear-resistant plate, the 12mm thick wear-resistant plate is divided into three part plates 107 / 108 / 109 along the circumferential direction of the annular retaining structure 101, and bent separately to facilitate the transportation and assembly of the part plates. The cutting difficulty and cutting workload of the wear-resistant plate are much greater than those of ordinary steel plates. The original 156 small blocks 103 / 104 / 105 have a cutting length of 174096mm. The wear-resistant plate is improved into three large part plates 107 / 108 / 109 after cutting, which are rolled up after cutting. The cutting length of the three large part plates is 29052mm. Compared with the original small blocks, the cutting length is reduced by 83.3%, reducing the labor of manual cutting.

[0032] like Figure 6As shown, a waist-shaped hole 110 is provided on the 6 mm back plate 106 that is bonded to the wear-resistant plate. Continuous fillet welds are used between the component plates 107 / 108 / 109 and the back plate 106 at the waist-shaped hole 110, and continuous fillet welds are also used between the periphery of each component plate 107 / 108 / 109 and the back plate 106. This avoids the component plate from bulging in the middle due to the component plate only being welded to the back plate on all sides and the middle bonding area being empty.

[0033] 2.Structure production

[0034] like Figure 7 , 8 As shown, position the back plate 106 on the concave arc-shaped tire frame, assemble the transverse and longitudinal reinforcement ribs on the concave side, and flip the assembled back plate 90° sideways. Lift the assembled back plate to the horizontal tire frame, assemble the part plate 107 / 108 / 109 cut from the wear-resistant plate on the back plate 106, flip the back plate 106 sideways 90°, and hoist it to the concave arc-shaped tire frame, with the wear-resistant plate facing the concave arc-shaped tire frame side, ensuring that the arc surface of the tire frame and the contact surface of the wear-resistant plate fit. Weld the fillet weld of the waist-shaped hole 110 between the part plate 107 / 108 / 109 and the back plate 106, weld the welds between the transverse and longitudinal reinforcement ribs and the back plate, flip the welded back plate 90° sideways, and lift it to the horizontal tire frame. Weld the remaining welds between the part plate 107 / 108 / 109 and the back plate. Taking the bolt holes 107 / 108 / 109 of the parts plate cut after the wear-resistant plates are connected by bolts on both sides as the reference, drill the bolt holes on the annular retaining structure 101, and transfer to the next process after passing the inspection.

[0035] When the structure is manufactured, the welding sequence of the fillet weld of the waist-shaped hole 110 between the wear-resistant plate 107 / 108 / 109 and the back plate 106 is as follows: Fig. 9 , 10 The order of ①-⑮.

[0036] The present application integrates 156 small wear-resistant plates into three large wear-resistant plates, which are then welded to the back plate 106. Fig.11 . Continuous welding is used in the middle waist hole 110 area and the surrounding areas. Compared with the intermittent welding before integration, the intermittent welding requirements are: 100mm long weld, 100mm interval, calculated, the entire weld length is 111072mm. The weld feet before and after improvement are both Z4.5. After integration, the entire weld length is 40183mm, the welding length is reduced by 63.8%, the corresponding heat input is reduced, and the overall manufacturing deformation of the annular retaining structure 101 is reduced, which effectively ensures the arc size accuracy of the completed annular retaining structure 101. At the same time, it solves the problem of a non-enclosed gap area between the wear-resistant plate and the back plate 106 caused by intermittent welding, and this area cannot be painted or other anti-corrosion construction, thus affecting the service life of the structure.

[0037] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A manufacturing process for an annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer, characterized in that: The steps include:

1. Parts plate processing According to the overall bending angle and thickness of the wear-resistant plate, the wear-resistant plate is cut along the circumferential direction of the annular retaining structure; A waist-shaped hole is provided on the back plate which is in contact with the wear-resistant plate; 2.Structure production Position the back plate on the concave arc-shaped tire frame, assemble the transverse reinforcement ribs and longitudinal reinforcement ribs on the concave side of the back plate, and flip the assembled back plate 90° sideways; hoist the assembled back plate to the horizontal tire frame, assemble the wear-resistant plate on the back plate, flip the back plate 90° sideways, and hoist it to the concave arc-shaped tire frame; weld the waist-shaped hole fillet weld between the wear-resistant plate and the back plate, and weld the transverse reinforcement ribs and longitudinal reinforcement ribs to the back plate. After welding, flip the back plate 90° sideways and hoist it to the horizontal tire frame; weld the remaining welds between the wear-resistant plate and the back plate; When the part plate is processed, the wear-resistant plate is divided into three part plates along the circumferential direction of the annular retaining structure, and is bent separately. The thickness of the wear-resistant plate is 12 mm; The wear-resistant plate and the back plate at the waist hole adopt continuous fillet welds, and the back plate is 6mm thick; A continuous fillet weld is used between the periphery of each cut wear-resistant plate and the back plate.

2. A manufacturing process for the annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer according to claim 1, characterized in that: When the structure is manufactured, the waist-shaped hole fillet welds between the wear-resistant plate and the back plate are welded in an alternating order of the welds on the middle part plate and the welds on the two end part plates.

3. A manufacturing process for the annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer according to claim 1, characterized in that: When the back plate equipped with the wear-resistant plate is hoisted to the inwardly concave arc-shaped tire frame, the wear-resistant plate faces the inwardly concave arc-shaped tire frame to ensure that the arc surface of the inwardly concave arc-shaped tire frame fits the contact surface of the wear-resistant plate.

4. A manufacturing process for an annular material retaining structure of a bucket wheel body of a bucket wheel stacker and reclaimer according to claim 1, characterized in that: After the remaining welds are welded, the bolt holes on the annular material retaining structure are drilled based on the bolt holes for connecting the wear-resistant plates on both sides.

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