Split type impact rotating wheel assembling and positioning structure and assembling and welding method

Abstract

The invention discloses a split impact type rotating wheel assembling and positioning structure and an assembling and welding method, and relates to the technical field of production and manufacturing of impact type rotating wheels, in particular to the split impact type rotating wheel assembling and positioning structure and the assembling and welding method, the split impact type rotating wheel assembling and positioning structure comprises a rotating wheel center body, a root water bucket and an external water bucket, the external water bucket is arranged on the root water bucket; corresponding pin holes are formed in the connecting face of the root water bucket and the external water bucket, and positioning pins are arranged in the pin holes. The assembly tool has the advantages that by arranging the positioning pins and the pin holes, the root water bucket and the external water bucket can be quickly and accurately spliced initially, the time of traditional manual adjustment is shortened, and the assembly efficiency is improved. By means of accurate matching of the positioning pin and the pin hole, the molded line of the water bucket can be restored in a high-precision mode, and stability and reliability of the rotating wheel in the operation process are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of production and manufacturing of impact wheels, and in particular to an assembly positioning structure and an assembly welding method for a split-type impact wheel. Background Art

[0002] As the core component of the power station water inlet ball valve, the design and manufacturing of the impact impeller directly affect the performance and safety of the unit. Although the traditional integral forging plus CNC machining method has superior performance, it has the problems of low material utilization and high cost. With the development of high-head and large-capacity impact units, the size of the impeller is getting larger and larger, and the existing forging capacity cannot meet the requirements. Therefore, the use of a split-petal structure has become an effective way to solve this problem. However, how to restore the water bucket with high precision after the petal is split has become a key challenge in manufacturing. The traditional manual adjustment method is not only time-consuming, but also difficult to ensure high precision requirements. Therefore, an efficient and high-precision assembly method is needed to solve this problem.

[0003] In the traditional manufacturing process of impact impellers, the bucket is a complex spatial structure, which makes it difficult to inspect and adjust during assembly. Usually, each bucket needs to be marked before assembly and assembled according to the markings. This process is not only time-consuming, but also the assembly accuracy is difficult to meet the high-precision requirements of the impeller. In addition, due to the complexity of the bucket profile, it is difficult to achieve high-precision restoration with traditional methods, which affects the stability and reliability of the impeller during operation. Summary of the invention

[0004] The present invention aims to overcome the above-mentioned shortcomings of the prior art and provides a split-flap impact wheel assembly positioning structure and an assembly and welding method.

[0005] The technical solution adopted by the present invention is as follows:

[0006] A split-flap impact wheel assembly positioning structure comprises: a wheel center body, a root water bucket and an external water bucket, wherein the root water bucket is arranged on the wheel center body, and the external water bucket is arranged on the root water bucket;

[0007] The connecting surfaces of the root water bucket and the external water bucket are provided with corresponding pin holes, and positioning pins are arranged in the pin holes.

[0008] Furthermore, the pin hole is arranged in the middle of the outer water bucket and the root water bucket.

[0009] Furthermore, at least two groups of pin holes are provided, which are arranged on both sides of the connection surface between the root water bucket and the external water bucket.

[0010] Furthermore, a buckle is provided at the end of the positioning pin, and a slot is provided at a position corresponding to the pin hole.

[0011] Furthermore, a welding groove is provided at the interface between the external water bucket and the root water bucket.

[0012] Furthermore, a method for welding a split-flap impact wheel assembly positioning structure comprises the following steps:

[0013] S1: Place the processed runner center body and root bucket on the working platform;

[0014] S2: Measure and mark the position of the root water bucket pin hole, and process the pin hole;

[0015] S3: Measure and mark the position of the external water bucket pin hole, and process the pin hole;

[0016] S4: Insert the positioning pin into the pin hole of the root water bucket, and then insert the external water bucket into the positioning pin, so that the root water bucket and the external water bucket are initially spliced, and positioning welding is performed;

[0017] S5: After all the water buckets are assembled according to S2-S4, the rotating wheel is preheated as a whole using a heating plate, and the preheating temperature is not less than 100°C;

[0018] S6: Weld the positions of the runner except the overhead welding in multiple sections, monitor the position profile size between the buckets, and adjust the welding sequence between the multiple sections;

[0019] S7: After welding to a certain depth, turn over, clean the root, and complete the welding except for the overhead welding;

[0020] S8: After the second turning, the remaining welds are welded;

[0021] S9: annealing in the furnace;

[0022] S10: After annealing, grind the weld to meet the requirements of flaw detection and profile.

[0023] Furthermore, water buckets are provided on both sides of the central body of the wheel. After completing the above steps, the central body of the wheel is turned over and placed on a working platform to process the water buckets on the other side.

[0024] Furthermore, after steps S2 and S3, groove processing is performed on the root water bucket and the external water bucket to facilitate subsequent welding.

[0025] Furthermore, in step S4, spot welding is used to fix the components during initial splicing, so as to facilitate subsequent adjustment of errors.

[0026] Furthermore, in step S4, tack welding is performed at multiple positions of the external water bucket, with a tack welding depth of 3-10 mm and a tack welding length of 10-100 mm.

[0027] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0028] 1. By setting the positioning pins and pin holes, the root water bucket and the external water bucket can be quickly and accurately spliced, which reduces the time of traditional manual adjustment and improves assembly efficiency.

[0029] 2. The precise matching of the positioning pin and the pin hole can restore the contour of the bucket with high precision, ensuring the stability and reliability of the runner during operation.

[0030] 3. The petal-type structure is adopted, each part is forged and processed separately, and then assembled and welded, which reduces material waste, improves material utilization, and thus reduces production costs.

[0031] 4. Through positioning welding and adjustment of welding sequence, the uniformity and consistency of the weld are ensured and the welding quality is improved.

[0032] 5. Through reasonable welding process and sequence adjustment, the overall strength of the runner is enhanced and its service life is extended.

[0033] 6. By setting the positioning holes and positioning pins in advance, the assembly process of the external water bucket is simplified, the operation steps are reduced, and the work efficiency is improved.

[0034] 7. The split-petal design makes the inspection and maintenance of the impeller more convenient. It can be inspected and repaired by simply removing the corresponding water bucket without disassembling the entire impeller. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 It is a schematic diagram of the structure of the present invention;

[0036] Figure 2 It is a schematic diagram of the structure of the present invention using two positioning pins;

[0037] Figure 3 It is a schematic diagram of the present invention using a positioning pin.

[0038] Markings in the figure:

[0039] 1-wheel center body, 2-root water bucket, 3-external water bucket, 4-pin hole, 5-locating pin, 6-welding groove.

[0040] Specific Examples

[0041] The present invention will be described in detail below in conjunction with the accompanying drawings.

[0042] In order to make the purpose, technical solution and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0043] In this embodiment, if Figure 1 ,2 As shown, a split-flap impact wheel assembly positioning structure comprises: a wheel center body 1, a root water bucket 2 and an external water bucket 3, wherein the root water bucket 2 is arranged on the wheel center body 1, and the external water bucket 3 is arranged on the root water bucket 2;

[0044] The connecting surfaces of the root water bucket 2 and the external water bucket 3 are provided with corresponding pin holes 4, and positioning pins 5 are provided in the pin holes 4.

[0045] The positioning pin 5 is made of high-strength alloy to ensure the strength of the overall bucket. By setting the positioning pin 5 and the pin hole 4, the root bucket 2 and the external bucket 3 are quickly and accurately spliced, which improves the assembly efficiency. This method not only simplifies the assembly process of the external bucket 3, but also ensures the assembly positioning accuracy of the external bucket 3. Through the positioning of the pin and hole, the positioning welding and the adjustment of the welding sequence, the assembly and welding dimensional accuracy of the impact runner are ensured.

[0046] Furthermore, the pin hole 4 is arranged in the middle of the outer water bucket 3 and the root water bucket 2.

[0047] Setting it in the middle of the water bucket is conducive to the opening of the pin hole 4. The axial width of the middle part is larger, which makes it easier to open the pin hole 4 and increases the adjustable range. The setting accuracy of the external water bucket 3 can be improved to ensure the later installation effect.

[0048] Furthermore, at least two groups of pin holes 4 are provided, which are arranged on both sides of the connection surface between the root water bucket 2 and the external water bucket 3.

[0049] When the pin holes 4 are arranged in two or more groups, they are arranged on both sides of the connection surface, and the surface is fixed by two points. When two positioning pins 5 are provided, the external water bucket 3 can be positioned more effectively, and the root water bucket 2 and the external water bucket 3 can be quickly and accurately spliced, thereby improving the assembly efficiency. This method not only simplifies the assembly process of the external water bucket 3, but also ensures the assembly positioning accuracy of the external water bucket 3.

[0050] Furthermore, a buckle is provided at the end of the positioning pin 5, and a slot is provided at a corresponding position of the pin hole 4.

[0051] By setting the buckle, the root bucket 2 and the external bucket 3 can be quickly and accurately spliced, which improves the assembly efficiency. This method not only simplifies the assembly process of the external bucket 3, but also ensures the assembly positioning accuracy of the external bucket 3. Through the positioning of pins and holes, positioning welding and welding sequence adjustment, the assembly and welding dimensional accuracy of the impact runner is ensured.

[0052] Furthermore, a welding groove 6 is provided at the interface between the external scoop 3 and the root scoop 2 .

[0053] Bevel processing helps to form welds in the subsequent welding process and improves welding quality. By setting the positioning holes and positioning pins 5 in advance and combining the use of buckles, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is ensured.

[0054] Furthermore, a method for welding a split-flap impact wheel assembly positioning structure comprises the following steps:

[0055] S1: Place the processed runner center body 1 and root bucket 2 on the working platform;

[0056] The runner center body 1 and the root bucket 2 are integrally formed, and the manufactured components are placed on the work platform for processing;

[0057] S2: Measure and mark the position of the pin hole 4 of the root bucket 2, and process the pin hole 4;

[0058] S3: Measure and mark the position of the pin hole 4 of the external water bucket 3, and process the pin hole 4;

[0059] S4: insert the positioning pin 5 into the pin hole 4 of the root water bucket 2, and then insert the external water bucket 3 into the positioning pin 5, so that the root water bucket 2 and the external water bucket 3 are initially spliced, and positioning welding is performed;

[0060] S5: After all the water buckets are assembled according to S2-S4, the rotating wheel is preheated as a whole using a heating plate, and the preheating temperature is not less than 100°C;

[0061] Preheating helps reduce welding stress, prevent deformation, and improve welding quality. Positioning welding and welding sequence adjustment ensure the dimension accuracy of the runner profile after welding; by setting positioning holes and positioning pins 5 in advance, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is ensured.

[0062] S6: Weld the positions of the runner except the overhead welding in multiple sections, monitor the position profile size between the buckets, and adjust the welding sequence between the multiple sections;

[0063] Welding in multiple sections helps control welding deformation and ensure weld quality; monitoring and adjustment help ensure the overall dimensional accuracy of the runner. Pin and hole positioning, tack welding and welding sequence adjustment ensure the assembly and welding dimensional accuracy of the impact runner.

[0064] S7: After welding to a certain depth, turn over, clean the root, and complete the welding except for the overhead welding;

[0065] Root cleaning helps to remove oxides and impurities generated during welding and improve the quality of the weld; turning over welding helps to fully inspect and correct weld defects. By setting the positioning holes and positioning pins 5 in advance, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is ensured.

[0066] S8: After the second turning, the remaining welds are welded;

[0067] The second turn-over welding helps to fully complete the welding work of the runner and ensure the quality of all welds. The precision of the runner profile after welding is ensured by positioning welding and adjusting the welding sequence; the assembly process of the external water bucket 3 is simplified by setting the positioning holes and positioning pins 5 in advance, and the assembly positioning accuracy of the external water bucket 3 is ensured.

[0068] S9: annealing in the furnace;

[0069] Annealing helps eliminate welding stress and improve the toughness and fatigue resistance of the runner. Through the positioning of pins and holes, positioning welding and welding sequence adjustment, the assembly and welding dimensional accuracy of the impact runner are ensured.

[0070] S10: After annealing, grind the weld to meet the requirements of flaw detection and profile;

[0071] Grinding the weld seam helps improve the surface quality of the runner and meet the requirements of flaw detection and profile. By setting the positioning holes and positioning pins 5 in advance, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is ensured.

[0072] The final inspection and testing helps ensure that the quality and performance of the runner meet the design requirements. By setting the positioning holes and positioning pins 5 in advance, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is guaranteed.

[0073] Furthermore, water buckets are provided on both sides of the wheel center body 1. After completing the above steps, the wheel center body 1 is turned over and placed on a working platform to process the water buckets on the other side.

[0074] Furthermore, after steps S2 and S3, groove processing is performed on the root water bucket 2 and the external water bucket 3 to facilitate subsequent welding.

[0075] Groove processing helps to form welds in the subsequent welding process and improves welding quality. At the same time, by setting the positioning holes and positioning pins 5 in advance, the assembly process of the external water bucket 3 is simplified and the assembly positioning accuracy of the external water bucket 3 is guaranteed.

[0076] Furthermore, in step S4, spot welding is used to fix the components during initial splicing, so as to facilitate subsequent adjustment of errors.

[0077] Use spot welding method to carry out preliminary positioning to facilitate subsequent adjustments.

[0078] Furthermore, in step S4, positioning welding is performed at multiple positions of the external water bucket 3, with a positioning welding depth of 3-10 mm and a positioning welding length of 10-100 mm.

[0079] The use of multi-point positioning welding can more effectively prevent deformation during subsequent operations and interfere with subsequent accuracy.

[0080] The above description is only a preferred embodiment of the invention and is not intended to limit the invention. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the invention should be included in the protection scope of the invention.

Claims

1. A split-petal impact wheel assembly and positioning structure, characterized in that: include: A runner central body (1), a root water bucket (2) and an external water bucket (3), wherein the root water bucket (2) is arranged on the runner central body (1), and the external water bucket (3) is arranged on the root water bucket (2); The connecting surfaces of the root water bucket (2) and the external water bucket (3) are provided with corresponding pin holes (4), and a positioning pin (5) is provided in the pin hole (4).

2. According to the split-petal impact wheel assembly and positioning structure described in claim 1, it is characterized by: The pin hole (4) is arranged in the middle of the outer water bucket (3) and the root water bucket (2).

3. According to the split-petal impact wheel assembly and positioning structure described in claim 1, it is characterized by: At least two groups of pin holes (4) are provided, which are arranged on both sides of the connection surface between the root water bucket (2) and the external water bucket (3).

4. According to the split-flap impact wheel assembly and positioning structure as described in claim 1, it is characterized by: The end of the positioning pin (5) is provided with a buckle, and the corresponding position of the pin hole (4) is provided with a slot.

5. The split-flap impact wheel assembly and positioning structure according to claim 1, characterized in that: The connecting surface between the external water bucket (3) and the root water bucket (2) is provided with a welding groove (6).

6. A method for welding a split-type impact wheel assembly and positioning structure, applied to a split-type impact wheel assembly and positioning structure according to any one of claims 1 to 5, characterized in that: The following steps are involved: S1: placing the processed assembly of the runner center body (1) and the root bucket (2) on a working platform; S2: Measure and mark the position of the pin hole (4) of the root water bucket (2), and process the pin hole (4); S3: Measure and mark the position of the pin hole (4) of the external water bucket (3), and process the pin hole (4); S4: inserting the positioning pin (5) into the pin hole (4) of the root water bucket (2), and then inserting the external water bucket (3) into the positioning pin (5), so that the root water bucket (2) and the external water bucket (3) are initially spliced, and positioning welding is performed; S5: After all the water buckets are assembled according to S2-S4, the rotating wheel is preheated as a whole using a heating plate, and the preheating temperature is not less than 100°C; S6: Weld the positions of the runner except the overhead welding in multiple sections, monitor the position profile size between the buckets, and adjust the welding sequence between the multiple sections; S7: After welding to a certain depth, turn over, clean the root, and complete the welding except for the overhead welding; S8: After the second turning, the remaining welds are welded; S9: annealing in the furnace; S10: After annealing, grind the weld to meet the requirements of flaw detection and profile.

7. A welding method for assembling and positioning a split-type impact wheel according to claim 6, characterized in that: Water buckets are arranged on both sides of the wheel center body (1). After completing the above steps, the wheel center body (1) is turned over and placed on a working platform to process the water buckets on the other side.

8. The welding method for assembling and positioning a split-type impact wheel according to claim 6, characterized in that: After steps S2 and S3, groove processing is performed on the root water bucket (2) and the external water bucket (3) to facilitate subsequent welding.

9. The welding method for assembling and positioning a split-type impact wheel according to claim 6, characterized in that: In step S4, the initial splicing is performed by spot welding to facilitate the subsequent adjustment of errors.

10. The welding method for assembling and positioning structure of a split-type impact wheel according to claim 6, characterized in that: In the step S4, tack welding is performed at multiple positions of the external water bucket (3), with a tack welding depth of 3-10 mm and a tack welding length of 10-100 mm.

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