Precise welding tool for multi-section cylindrical fluidized bed reactor

Abstract

The utility model provides a precise welding tool for a multi-section cylindrical fluidized bed reactor. The precise welding tool comprises a main body part, an extension piece, a support and a supporting foot structure, wherein the supporting leg structure can be connected with the support in a matched mode, two supporting legs extending in the radial direction are arranged on the lower portion of the supporting leg structure, an adjusting assembly is arranged on the upper portion of the supporting leg structure and used for adjusting the relative position between the supporting leg structure and the support, at least one first centering ring is of a flange structure, and at least one second centering ring is of a flange structure. The first centering ring and the second centering ring which are of a flange structure can be tightly connected with each other. Therefore, the main body part and the extension piece are used as welding references, so that the welding precision of the multi-section type cylindrical fluidized bed reactor can be improved, the influence of accumulated errors on the welding seam precision during multi-section sequential welding is avoided, and the operation difficulty of welding processing is greatly reduced.

Description

Technical Field

[0001] The utility model belongs to the field of manufacturing equipment for producing electronic-grade granular silicon materials, and particularly relates to a precision welding tool for a multi-stage cylindrical fluidized bed reactor. Background Art

[0002] The fluidized bed reactor is the key equipment for producing electronic grade granular silicon materials. Its main body is cylindrical and is made up of multiple sections of ring or cone structures with different radii welded end to end. Figure 1 Figure 1 shows the schematic diagram of a typical fluidized bed reactor. The main structure of the fluidized bed reactor shown in the figure, from bottom to top, includes the bottom flange a1, lower cone seal a2, cylinder a3, upper cone seal a4, heater base ring a5, upper cylinder section a6, top cone seal a7, top cylinder section a8, and top flange a9. To ensure machining accuracy, these components are typically manufactured separately and then welded layer by layer.

[0003] Although current automated welding technology has significantly improved welding accuracy, the fluidized bed reactor, as the site of continuous thermal decomposition of silane gas during the processing of electronic-grade granular silicon materials, must maintain a high-temperature operating environment for extended periods. Consequently, minor weld quality defects at room temperature may be amplified during long-term high-temperature operation, impacting the safe and continuous operation of the fluidized bed reactor. Furthermore, silane decomposes and deposits within the fluidized bed, then undergoes a vapor deposition reaction on silicon seed crystals pre-placed within the fluidized bed reactor, generating granular polysilicon products. As production progresses, the growing granular silicon products are continuously discharged from the bottom of the fluidized bed. Therefore, concentricity errors in the multi-stage cylindrical structure of the fluidized bed reactor may affect the yield of the granular silicon products.

[0004] like Figure 1 As shown, the fluidized bed reactor is quite large: with a maximum nominal diameter of DN2600mm and a total length of 9100mm, it includes eight circumferential welds along its entire length. Maintaining the quality of these multiple circumferential welds, ensuring that the coaxiality tolerance of the bottom flange a1 and the top flange a2 after welding does not exceed 3mm, and the parallelism tolerance of the sealing surfaces of the top flange a2 and the bottom flange a1 does not exceed 3mm, and that the length tolerance is within 3mm, is extremely difficult. Due to manufacturing variations in individual components, assembly errors between components, and the requirement to simultaneously meet the misalignment requirements between components, conventional assembly methods will result in the fluidized bed reactor failing to meet tolerance requirements due to cumulative errors, and weld deformation cannot be directly observed. Summary of the Invention

[0005] In view of this, the utility model provides a precision welding tooling for a multi-stage cylindrical fluidized bed reactor, which can solve the problems of product assembly, welding deformation control, rapid inspection of dimensional tolerances, and greatly improve efficiency.

[0006] The utility model provides a precision welding tool for a multi-stage cylindrical fluidized bed reactor, comprising:

[0007] The main body is a tubular structure with a first pair of centering rings at both ends;

[0008] The extension piece is a tubular structure with a second pair of centering rings at both ends;

[0009] Supports are provided on the outer circumference of the main body and the extension member, and are distributed at at least two different positions in the length direction of the main body and the outer circumference of the extension member;

[0010] A support leg structure can be connected to the support, and has two radially extending support legs at its lower portion and an adjustment assembly at its upper portion for adjusting the relative position between the support leg structure and the support;

[0011] At least one of the first centering rings is in a flange structure, and at least one of the second centering rings is in a flange structure. The first centering ring and the second centering ring in a flange structure can be fastened to each other.

[0012] Preferably, the support and the leg structure are constructed so that when the leg structure is adjusted to a set relative position relative to the support, the reverse extension lines of the length direction of the two legs of the leg structure intersect at the cross-sectional center of the main body.

[0013] Preferably, the support includes a support base plate radially arranged perpendicular to the main body, the support leg structure includes a support leg top plate, the support base plate and the support leg top plate are correspondingly provided with a pair of threaded holes, and the adjustment assembly includes a threaded member, which passes through the threaded holes of the support base plate and the support leg top plate to adjust the distance between the support base plate and the support leg top plate.

[0014] Preferably, the threaded holes on the support base plate and the support leg top plate are arranged such that, when the relative positions are set, the threaded holes on the support base plate are located on the opposite extension lines of the length direction of the two legs of the support leg structure.

[0015] Preferably, the setting of the relative position includes: the distance from the free ends of the two legs of the leg structure to the main body is equal to the inner diameter of the fluidized bed reactor to be welded minus the outer diameter of the main body.

[0016] Preferably, the support further comprises a support web arranged perpendicular to the axial direction of the main body and a support rib connected between the support base plate and the support web.

[0017] Preferably, the threaded holes on the support base plate and the support leg top plate are oblong holes, and the length direction of the oblong holes is perpendicular to the length direction of the main body.

[0018] Preferably, it further comprises a centering guide groove which is provided on the first centering ring and is adapted to cooperate with a guide pin on the cylindrical fluidized bed reactor.

[0019] Preferably, the main body and the extension piece are provided with lifting ears on the inner wall surface of the tubular structure near both ends, and the lifting ears do not exceed the maximum length range of the tubular structure in the axial direction; the main body and the extension piece are provided with operating holes through the tubular structure, and the operating holes are provided near the lifting ears.

[0020] Preferably, a plurality of weight-reducing holes are provided through the tubular structure of the main body and the extension piece.

[0021] Based on the above technical solution, the utility model uses the main body and the extension as the basis for welding, which can improve the welding accuracy of the multi-stage cylindrical fluidized bed reactor, avoid the influence of accumulated errors on the weld accuracy when welding multiple sections in sequence, and greatly reduce the operational difficulty of the welding process. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are used to provide a further understanding of the technical solution of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the technical solution of the present application, but do not constitute a limitation on the technical solution of the present application.

[0023] Figure 1 Schematic diagram of the structure of the fluidized bed reactor;

[0024] Figure 2 This is a schematic structural diagram of the main body of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0025] Figure 3 This is a schematic structural diagram of the main part A of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0026] Figure 4 This is a schematic diagram of the structure of the main part of the precision welding tooling of a multi-stage cylindrical fluidized bed reactor provided by the utility model;

[0027] Figure 5 This is a schematic diagram of the extension structure of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the utility model;

[0028] Figure 6 This is a schematic structural diagram of the extension piece A of a precision welding fixture for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0029] Figure 7 This is a schematic diagram of the B-direction structure of an extension piece of a precision welding tooling for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0030] Figure 8 This is a structural schematic diagram of the docking state of the main body and extension piece of a precision welding tooling for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0031] Figure 9 This is a schematic structural diagram of the A-axis state of the main body and extension piece of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the utility model;

[0032] Figure 10 This is a schematic diagram of the structure of the main body and the extension piece of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the present invention in the docking state;

[0033] Figure 11 This is a schematic diagram of the AA cross-sectional structure of a precision welding fixture for a multi-stage cylindrical fluidized bed reactor provided by the present invention, showing the state of the main body and the extension being butted together;

[0034] Figure 12 This is a schematic diagram of the BB cross-sectional structure of a precision welding fixture of a multi-stage cylindrical fluidized bed reactor provided by the present invention, showing the main body and the extension member in a docking state;

[0035] Figure 13 A schematic side view of the support leg structure of a precision welding fixture for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0036] Figure 14 A schematic top view of the support leg structure of a precision welding fixture for a multi-stage cylindrical fluidized bed reactor provided by the present invention;

[0037] Figure 15 This is a structural schematic diagram of a precision welding tool for a multi-stage cylindrical fluidized bed reactor provided by the present invention, in which the main body is arranged in the lower structure of the fluidized bed reactor;

[0038] Figure 16 This is a structural schematic diagram of a multi-stage cylindrical fluidized bed reactor provided by the utility model, in which the main body and extension piece of the precision welding tooling are jointly arranged in the fluidized bed reactor.

[0039] Reference numerals:

[0040] 1-Main body; 11-First pair of centering rings; 12-Centering guide groove; 2-Extension piece; 21-Second pair of centering rings; 3-Support; 31-Support base plate; 32-Support web plate; 33-Support rib plate; 4-Support leg structure; 41-Support leg top plate; 5-Adjustment assembly; 6-Lifting lug; 7-Operation hole; 8-Weight reduction hole;

[0041] a1- bottom flange, a2- lower cone seal, a3- cylinder, a4- upper cone seal, a5- heater base ring, a6- upper cylinder section, a7- top cone seal, a8- top cylinder section, a9- top flange. DETAILED DESCRIPTION

[0042] Various exemplary embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The description of the exemplary embodiments is merely illustrative and does not constitute any limitation on the present invention and its application or use. The present invention can be implemented in many different forms and is not limited to the embodiments described herein. These embodiments are provided to make the present invention clear and complete and to fully convey the scope of the present invention to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the components and steps described in these embodiments should be interpreted as merely exemplary and not as limiting.

[0043] like Figure 1-16 As shown, the utility model provides a precision welding tool for a multi-stage cylindrical fluidized bed reactor, including a main body 1, an extension 2, a support 3 and a support leg structure 4.

[0044] The main body 1 is as follows Figure 2 As shown, it is a tubular structure, and as Figure 3-4 As shown, the main body 1 is provided with a first pair of centering rings 11 at both ends. The first pair of centering rings 11 can be placed inside the cavity of the fluidized bed reactor and close to one end of the fluidized bed reactor for checking the axial and radial positions of the fluidized bed reactor from one end. Figure 5 As shown, it also has a tubular structure, with a second pair of centering rings 21 at both ends. The second pair of centering rings 21 can be placed inside the cavity of the fluidized bed reactor and close to the other end of the fluidized bed reactor for calibrating the axial and radial positions of the fluidized bed reactor from the other end.

[0045] Reference Figure 8 、 Figure 15 and Figure 16 At least one of the first centering rings 11 is a flange structure, and at least one of the second centering rings 21 is a flange structure, and the first centering rings 11 and the second centering rings 21 with flange structures can be fastened to each other, thereby allowing the main body 1 to be spliced ​​with the extension piece 2 when its own length is insufficient, thereby providing a welding reference for a fluidized bed reactor with a longer axial length.

[0046] Those skilled in the art will appreciate that fluidized bed reactors can have different lengths. Therefore, the main body 1 can be spliced ​​with extension pieces 2 of different lengths to accommodate fluidized bed reactors of varying lengths. A second extension piece 2 can also be spliced ​​to the other end of the main body 1 to further increase the length of the welding work. The main body 1 can be preferably positioned within the cylinder a3 of the fluidized bed reactor, while the extension piece 2 can be preferably positioned within the upper cylinder section a6 of the fluidized bed reactor.

[0047] like Figure 2 、 Figure 5 、 Figure 8-14 As shown, the precision welding tooling of the present invention also includes a support 3, which is arranged on the outer peripheral surfaces of the main body 1 and the extension 2, and is distributed at at least two different positions in the length direction of the main body 1 and the outer peripheral surface of the extension 2; and correspondingly, the support leg structure 4 can be connected with the support 3, and its lower part is provided with two radially extending support legs, and its upper part is provided with an adjustment component 5 for adjusting the relative position between the support leg structure 4 and the support 3.

[0048] like Figure 9-12 As shown, preferably, the support 3 and the leg structure 4 are constructed so that when the leg structure 4 is adjusted to a set relative position relative to the support 3, the reverse extension lines of the length direction of the two legs of the leg structure 4 intersect at the center of the cross-section of the main body 1. It can be understood that, preferably, the set relative position includes: the distance from the free ends of the two legs of the leg structure 4 to the main body 1 is equal to the inner diameter of the fluidized bed reactor to be welded minus the outer diameter of the main body 1. Therefore, when the welding fixture of the present invention is placed inside the fluidized bed reactor, due to the above-mentioned length relationship, when the main body 1 is supported inside the fluidized bed reactor by the support 3 and the leg structure 4, the main body 1 and the cylinder a3 of the fluidized bed reactor must be concentric. Therefore, when implementing the precision welding tooling of the present invention, the support leg structure 4 can be pre-adjusted to a set relative position relative to the support 3 based on the measurement results of the inner diameter of the cylinder a3 of the fluidized bed reactor, which can greatly reduce the workload for small-batch repetitive welding work; of course, it is also possible to not measure the inner diameter, but instead adjust the relative position after placing the precision welding tooling of the present invention inside the cylinder a3 of the fluidized bed reactor.

[0049] Further preferably, the support 3 includes a support base plate 31 radially arranged perpendicular to the main body 1, and the support leg structure 4 includes a support leg top plate 41. The support base plate 31 and the support leg top plate 41 are correspondingly provided with a pair of threaded holes. The adjustment assembly 5 includes a threaded member that passes through the threaded holes of the support base plate 31 and the support leg top plate 41 to adjust the distance between the support base plate 31 and the support leg top plate 41. It will be understood by those skilled in the art that the distance between the support base plate 31 and the support leg top plate 41 can be adjusted by rotating the threaded member relative to the threaded holes of the support base plate 31 and the support leg top plate 41. The threaded member may include a stud, a screw, etc. The threaded hole may also be implemented by a flat hole with a nut fixed on one side. Of course, other equivalent methods of adjusting the distance are also within the scope of protection of the present invention, including but not limited to increasing the number of gaskets, a pneumatic cylinder or an oil cylinder, etc.

[0050] like Figure 9-12 As shown, preferably, the threaded holes on the support base plate 31 and the support leg top plate 41 are arranged so that, when the relative positions are set, the threaded holes on the support base plate 31 are located on the opposite extension lines of the length direction of the two legs of the support leg structure 4. This ensures that when the main body 1 is positioned above the support 3, the opposite extension lines of the length direction of the two legs of the support 3 intersect at the center of the main body 1, thereby ensuring the concentricity of the main body 1 and the fluidized bed reactor.

[0051] like Figure 13-14 As shown, preferably, the threaded holes on the support base plate 31 and the support leg top plate 41 are oblong holes, with the length direction of the oblong holes being perpendicular to the length direction of the main body 1. By configuring the threaded holes as oblong holes, the threaded members have adjustment freedom perpendicular to the length direction of the main body 1 relative to the support base plate 31 and the support leg top plate 41, thereby facilitating horizontal position adjustment of the main body 1 relative to the fluidized bed reactor. Of course, those skilled in the art will understand that after adjustment reaches the preset position, when the threaded members are tightened relative to the threaded holes, this degree of freedom perpendicular to the length direction of the main body 1 disappears, and the threaded members are fixed.

[0052] Preferably, the support 3 also includes a support web 32 axially arranged perpendicular to the main body 1 and a support rib 33 connected between the support base 31 and the support web 32, thereby forming three-dimensional positioning to ensure the structural stability of the support 3 and support for the main body 1.

[0053] like Figure 3As shown, preferably, it also includes a centering guide groove 12, which is opened on the first centering ring 11 and is suitable for cooperating with the guide pin on the cylindrical fluidized bed reactor, so as to achieve relative positioning of the main body 1 and the fluidized bed reactor in the circumferential direction.

[0054] Preferably, the main body 1 and the extension 2 are provided with lifting ears 6 on the inner wall surface of the tubular structure near both ends, and the lifting ears 6 do not exceed the maximum length of the tubular structure in the axial direction. The main body 1 and the extension 2 are provided with operation holes 7 extending through the tubular structure, and the operation holes 7 are provided near the lifting ears 6. When using the welding tool provided by the utility model, workers can perform lifting operations on the lifting ears 6 through the operation holes 7, reducing the difficulty of application.

[0055] Preferably, a plurality of weight-reducing holes 8 are provided through the tubular structure of the main body 1 and the extension piece 2 .

[0056] like Figure 15-16 As shown, the implementation process of the utility model is described:

[0057] like Figure 15 As shown, when in use, first place the middle section of the reactor body on the rollers, place the main body 1 and the support 3 in the cylinder a3 of the fluidized bed reactor, install the threaded parts in the adjustment component 5, first make a rough adjustment to make the main body 1 concentric with the cylinder a3 of the fluidized bed reactor, adjust the relative position of the welding fixture and the cylinder a3 in the vertical direction through the adjustment component 5, and adjust the relative position of the welding fixture and the cylinder a3 in the horizontal direction through the oblong holes on the support bottom plate 31 and the support foot top plate 41. Next, assemble the fluidized bed reactor's bottom flange a1, lower cone seal a2, upper cone seal a4, heater base ring a5, and cylinder a3. Adjust the clearance between the inner hole of bottom flange a1 and the outer circumference of the first centering ring 11 to be uniform, align the sealing surface of bottom flange a1 with the outer end surface of the first centering ring 11, and evenly space the bolt holes of bottom flange a1 and the cross-marks of the first centering ring 11 across the center. Assemble the guide pins on the fluidized bed reactor and bottom flange a1 along the centering grooves. Adjust the clearance between the inner hole of heater base ring a5 and the outer circumference of the first centering ring 11 on the other side of the welding fixture to be uniform, and align the sealing surface of heater base ring a5 with the outer end surface of the first centering ring 11 on the other side of the welding fixture to be parallel. Once all these requirements are met, weld the annular seam. Check the coaxiality and parallelism of these details frequently during welding.

[0058] like Figure 16As shown, after completing the above steps, secure the main body 1 and extension 2 with locating pins and tighten the fasteners. Then, assemble the upper barrel section a6, top cone seal a7, top barrel section a8, and top flange a9 with the above components. Adjust the clearance between the inner hole of top flange a9 and the outer diameter of the second centering ring 21 to be uniform. Adjust the sealing surface of top flange a9 to be flush or parallel with the outer end surface of the second centering ring 21, with a length deviation of no more than 3mm. Adjust the bolt holes of top flange a9 to be evenly spaced across the cross-marks of the second centering ring 21. Once these requirements are met, weld the girth seam. Check the coaxiality and parallelism of the above during welding.

[0059] Based on the above technical solution, the utility model uses the main body 1 and the extension 2 as the welding basis, which can improve the welding accuracy of the multi-stage cylindrical fluidized bed reactor, avoid the influence of the accumulated error on the weld accuracy when multiple sections are welded in sequence, and greatly reduce the operational difficulty of the welding process.

[0060] In one embodiment, after the main body 1 and the extension 2 are fastened together, the outer circles of the centering rings and the outer end faces of the centering rings at both ends are machined using the same reference to ensure that the coaxiality deviation of the outer circles of the centering rings is ≤0.2 mm, that the spacing between the outer end faces of the centering rings at both ends is the same as the length of the fluidized bed reactor, with a deviation of ±1 mm, and that the parallelism deviation of the outer end faces of the centering rings at both ends is ≤0.2 mm. The processed components are then placed on a horizontally adjusted platform to assemble and weld the support 3 components.

[0061] The above description is merely a specific embodiment of the present application, but the scope of protection of the present application is not limited thereto. Any changes or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in this application should be included in the scope of protection of the present application. Therefore, the scope of protection of the present application should be based on the scope of protection of the claims.

Claims

1. A precision welding tool for a multi-stage cylindrical fluidized bed reactor, characterized in that: include: The main body (1) is a tubular structure, with a first pair of centering rings (11) provided at both ends; The extension piece (2) is a tubular structure, and a second pair of centering rings (21) are provided at both ends thereof; Supports (3) are provided on the outer peripheral surfaces of the main body (1) and the extension member (2), and are distributed at at least two different positions in the longitudinal direction of the main body (1) and on the outer peripheral surface of the extension member (2); A support leg structure (4) can be connected to the support seat (3), and has two radially extending support legs at its lower portion and an adjustment assembly (5) at its upper portion for adjusting the relative position between the support leg structure (4) and the support seat (3); At least one of the first centering rings (11) is a flange structure, and at least one of the second centering rings (21) is a flange structure, and the first centering ring (11) and the second centering ring (21) having flange structures can be fastened to each other.

2. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 1, characterized in that: The support (3) and the support leg structure (4) are constructed so that when the support leg structure (4) is adjusted to a set relative position relative to the support (3), the reverse extension lines of the length directions of the two legs of the support leg structure (4) intersect at the center of the cross section of the main body (1).

3. The precision welding tooling for a multi-stage cylindrical fluidized bed reactor according to claim 2, characterized in that: The support (3) includes a support base plate (31) radially arranged perpendicular to the main body (1); the support leg structure (4) includes a support leg top plate (41); the support base plate (31) and the support leg top plate (41) are correspondingly provided with a pair of threaded holes; the adjustment assembly (5) includes a threaded member, the threaded member passes through the threaded holes of the support base plate (31) and the support leg top plate (41) and is used to adjust the distance between the support base plate (31) and the support leg top plate (41).

4. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 3, characterized in that: The threaded holes on the support base plate (31) and the support leg top plate (41) are arranged in such a manner that, when the relative positions are set, the threaded holes on the support base plate (31) are located on the reverse extension lines of the length directions of the two support legs of the support leg structure (5).

5. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 4, characterized in that: The setting of the relative position includes: the distance from the free ends of the two legs of the leg structure (4) to the main body (1) is equal to the inner diameter of the fluidized bed reactor to be welded minus the outer diameter of the main body (1).

6. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 5, characterized in that: The support (3) further comprises a support web (32) axially arranged perpendicular to the main body (1) and a support rib (33) connected between the support base plate (31) and the support web (32).

7. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 3, characterized in that: The threaded holes on the support base plate (31) and the support leg top plate (41) are oblong holes, and the length direction of the oblong holes is perpendicular to the length direction of the main body (1).

8. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 1, characterized in that: It also includes a centering guide groove (12) which is opened on the first centering ring (11) and is suitable for matching with the guide pin on the cylindrical fluidized bed reactor.

9. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 1, characterized in that: The main body (1) and the extension piece (2) are provided with lifting ears (6) at positions near both ends of the inner wall surface of the tubular structure, and the lifting ears (6) do not exceed the maximum length range of the tubular structure in the axial direction; the main body (1) and the extension piece (2) are provided with operating holes (7) through-through on the tubular structure, and the operating holes (7) are provided near the lifting ears (6).

10. The precision welding tool for a multi-stage cylindrical fluidized bed reactor according to claim 1, characterized in that: The main body (1) and the extension piece (2) are provided with a plurality of weight-reducing holes (8) extending through the tubular structure.

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