Clamping assembly for shape follow-up welding of water turbine seat ring and volute

Abstract

The invention relates to the field of welding machining, in particular to a clamping assembly for shape follow-up welding of a water turbine seat ring and a volute. The clamping assembly comprises a main control base table, a supporting assembly and a matched lubricating assembly, a rotating tray is rotationally arranged at the upper end of the main control base table, the volute is arranged at the upper end of the rotating tray through a clamping assembly, and the clamping assembly comprises four clamping control boxes; when the volute and the seat ring of the water turbine need to be welded in a shape-following mode, the volute and the seat ring are supported through the rotatable rotating tray, during supporting, the volute is horizontally positioned and supported through the clamping assembly in a rapidly-adjustable mode, the seat ring is horizontally supported stably and rapidly through the supporting assembly, and then the volute and the seat ring are in matched butt joint. In addition, the clamping assembly and the supporting assembly can conduct rapid adaptive adjustment according to the size of the volute and the size of the seat ring, the applicability is higher, the clamping assembly and the supporting assembly are matched with the lubricating assembly, and the use stability of the clamping assembly can be improved according to lifting movement of a C-shaped supporting clamping plate.

Description

Technical Field

[0001] The present invention relates to the field of welding processing, and specifically to a clamping assembly for the conforming welding of a turbine stay ring and a spiral case. Background Technique

[0002] A water turbine is a power machine that converts the energy of water flow into rotational mechanical energy. When the water flow passes through the blade channels of the runner, restricted by the blade shape of the impeller and the cross-sectional area of the flow channel, the direction and velocity magnitude of the water flow continuously change. The runner rotates around the axis under the action of the reaction force of the water flow, converting the water energy into mechanical energy. When processing a water turbine, the spiral case and the stay ring after welding need to be welded first, and during welding, the positions of the two need to be positioned and clamped; The invention with the publication number CN116944743B discloses a self-adjusting support tooling for the welding of a water turbine spiral case ring seat, including a base, an upper ring plate, a lower ring plate, and guide vanes. By driving the servo motor to rotate 30 degrees, the guide vanes can be automatically inserted between the upper ring plate and the lower ring plate for welding, eliminating the need for workers to insert the guide vanes between the upper ring plate and the lower ring plate one by one, with a higher degree of automation and higher welding processing efficiency. Through the cooperation of various mechanisms, the above solution can achieve the automatic placement and positioning of the guide vanes. When welding the stay ring and the spiral case after welding is completed, since the diameter of the spiral case changes and the upper and lower end faces of the stay ring are in a horizontal posture, when welding the two, the spiral case needs to be placed horizontally or the stay ring needs to be placed obliquely correspondingly to facilitate the conforming welding operation at the joint. However, repeated adjustment operations are required during placement and clamping, which is time-consuming and laborious, and the applicability is poor when used for welding spiral cases and stay rings with different diameters. Summary of the Invention

[0003] The purpose of the present invention is to provide a clamping assembly for the conforming welding of a water turbine stay ring and a spiral case to solve the problems raised in the above background technique.

[0004] To achieve the above purpose, the present invention provides the following technical solution: A clamping assembly for the conforming welding of a water turbine stay ring and a spiral case, including: A main control base platform, on the upper end of which a rotating tray is rotatably provided. On the upper end of the rotating tray, a spiral case is provided through a clamping assembly. The clamping assembly includes four clamping control boxes. In each clamping control box, a clamping movable seat is movably provided. On the upper end of each clamping movable seat, a C-shaped lifting clamping plate is provided in a lifting manner, and the upper end of the C-shaped lifting clamping plate is in contact with the lower end of the spiral case; A lifting component, which is provided at the center of the upper end of the rotating tray. The lifting component includes a rhombus support column, a support round table, four fixed support rods, and four extension support rods. The upper ends of the four extension support rods are respectively in contact with the lower end of the stay ring; Cooperating with the lubrication assembly, the cooperating lubrication assembly is arranged at the upper end of the clamping movable seat close to the C-shaped lifting clamping plate, and the cooperating lubrication assembly includes an oil storage cavity and a synchronous piston rod.

[0005] Preferably, adaptation grooves are respectively formed at the upper ends of the clamping control boxes, control lead screws are horizontally arranged in the adaptation grooves, a control screw groove is formed through the center of the lower end of the clamping movable seat, the clamping movable seat is horizontally and slidably inserted into the adaptation grooves and movably sleeved on the control lead screws through the control screw groove.

[0006] Preferably, strip-shaped through grooves are respectively formed through the clamping control boxes on one side of the adaptation grooves, first control joints and second control joints are respectively communicated and arranged on one side of the clamping movable seat located in the strip-shaped through grooves, and the first control joints and the second control joints respectively penetrate through the strip-shaped through grooves movably.

[0007] Preferably, jacking access grooves are horizontally formed on one side of the clamping movable seat where the first control joints are located, lifting cylinder grooves are respectively vertically formed at both sides of the upper ends of the jacking access grooves, two jacking columns are vertically and symmetrically arranged at the lower end of the C-shaped lifting clamping plate, the lower ends of the two jacking columns respectively penetrate through the upper and lower parts of the clamping movable seat through sealing rings and are inserted into the lifting cylinder grooves, and jacking pistons are arranged at the lower ends of the jacking columns placed in the lifting cylinder grooves.

[0008] Preferably, a limiting ring is arranged at the upper end of the lifting cylinder groove, a return push access groove is formed on the inner peripheral side of the limiting ring, both return push access grooves are communicated with the second control joints, and the inner diameter of the limiting ring is smaller than the diameter of the jacking piston.

[0009] Preferably, a rotation control seat is arranged at the center of the rotating tray, the lower end of the rotation control seat is rotatably inserted into the upper end of the main control base, a lifting control groove is formed in the rotation control seat, a lifting control cylinder is vertically arranged in the lifting control groove, a rhombic support column is vertically arranged at the center of the upper end of the lifting control cylinder, and the upper end of the rhombic support column vertically penetrates through the rotation control seat movably.

[0010] Preferably, a support round table is horizontally arranged at the upper end of the rhombic support column, four fixed support rods are horizontally and symmetrically arranged on the outer peripheral side of the support round table, extension support rods are movably sleeved on one side of the four fixed support rods, adjusting screws are rotatably inserted through threaded plates on the side of the extension support rods away from the support round table, and one end of the adjusting screw is threadedly inserted into the center of the fixed support rod.

[0011] Preferably, adaptation grooves are respectively formed at the upper ends of one side of the clamping control boxes close to the support round table, the width of the adaptation grooves is larger than the width of the extension support rods, and the extension support rods are arranged corresponding to the adaptation grooves.

[0012] Preferably, an oil storage cavity is formed between the two lifting cylinder grooves in the clamping movable seat. An upper end of the oil storage cavity penetrates through the clamping movable seat to form a piston groove. A partition plate is horizontally arranged at the center of the piston groove. A synchronous piston rod is vertically and movably inserted through the center of the partition plate. Pressing pistons and compression pistons are respectively arranged at upper and lower ends of the synchronous piston rod penetrating through the partition plate. An upper end of the pressing piston extends out of the piston groove. A return spring is sleeved between the pressing piston and the partition plate on the synchronous piston rod. When the C-shaped lifting clamp plate descends to the maximum extent, a lower end of the C-shaped lifting clamp plate contacts an upper end of the pressing piston.

[0013] Preferably, a valve groove is formed at a lower end of the oil storage cavity and communicates with an upper end of the control screw groove. A one-way valve is inserted into the valve groove.

[0014] Compared with the prior art, the beneficial effects of the present invention are as follows: When it is necessary to perform profiling welding on the turbine volute and stay ring, the two are supported and lifted by the rotatable rotating tray. During the support and lifting, the volute is horizontally positioned and supported in a quickly adjustable manner through the clamping assembly, and the stay ring is horizontally supported stably and quickly through the lifting assembly. Then, the two are adaptively docked, improving the efficiency of welding adjustment, saving time and effort. In addition, the clamping assembly and the lifting assembly can be quickly adapted and adjusted according to the sizes of the volute and the stay ring, with stronger applicability. Cooperating with the lubricating assembly, the use stability of the clamping assembly can be improved according to the lifting movement of the C-shaped lifting clamp plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic diagram of the first perspective of the structure of the present invention; Figure 2 For the present invention Figure 1 schematic diagram of part A; Figure 3 is a schematic diagram of the second perspective of the structure of the present invention; Figure 4 For the present invention Figure 3 schematic diagram of part B; Figure 5 is a schematic diagram of the installation structure of the clamping control box of the present invention; Figure 6 For the present invention Figure 5 schematic diagram of part C; Figure 7 is a schematic cross-sectional view of the connection structure of the extended support rod of the present invention; Figure 8 For the present invention Figure 7 schematic diagram of part D; Figure 9 For the present invention Figure 7 schematic diagram of part E; Figure 10 is a cross-sectional view of the connection between the clamping movable seat and the C-shaped lifting clamp plate of the present invention; Figure 11 For the present invention Figure 10 schematic diagram of part F.

[0016] In the figure: main control base 1, rotating tray 2, clamping control box 3, adaptive moving slot 4, clamping moving seat 5, C-shaped lifting splint 6, control lead screw 7, volute 8, seat ring 9, supporting round platform 10, fixed supporting rod 11, extended supporting rod 12, rotating control seat 13, lifting control cylinder 14, rhombus supporting column 15, adjusting screw 16, strip through slot 17, first control joint 18, second control joint 19, jacking access slot 20, lifting cylinder slot 21, jacking column 22, back-pushing access slot 23, oil storage cavity 24, synchronous piston rod 25, pressing piston 26, compression piston 27, return spring 28, control thread groove 29, one-way valve 30, jacking piston 31, matching groove 32. Specific embodiments

[0017] In order to clearly and completely describe the purpose, technical solution of the present invention, and make the advantages more clear, the following further details the embodiments of the present invention with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are part of the embodiments of the present invention, rather than all of the embodiments, and are only used to explain the embodiments of the present invention, not to limit the embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention.

[0018] Please refer to Figures 1 - 11 , the present invention provides the following technical solutions: Embodiment 1: A clamping assembly for profiling welding of a water turbine seat ring and a volute, including a main control base 1, a rotating tray 2 is rotatably provided at the upper end of the main control base 1, and a volute 8 is provided at the upper end of the rotating tray 2 through a clamping assembly. The clamping assembly includes four clamping control boxes 3. A clamping moving seat 5 is movably provided in each clamping control box 3. A C-shaped lifting splint 6 is provided at the upper end of each clamping moving seat 5 in a lifting manner. The upper end of the C-shaped lifting splint 6 is in contact with the lower end of the volute 8. An adaptive moving slot 4 is opened at the upper end of each clamping control box 3. A control lead screw 7 is horizontally provided in each adaptive moving slot 4. A control thread groove 29 is opened through the center of the lower end of the clamping moving seat 5. The clamping moving seat 5 is horizontally slidably inserted into the adaptive moving slot 4 and is movably sleeved on the control lead screw 7 through the control thread groove 29. A servo motor is inserted and connected at one end of the control lead screw 7 in the clamping control box 3. The position of the clamping moving seat 5 in the adaptive moving slot 4 is adjusted by the servo motor to control the clamping moving seat 5 to be directly below different positions of the volute 8.

[0019] On one side of the adaptation activity slot 4, a strip-shaped through slot 17 is provided through the clamping control box 3. On one side of the strip-shaped through slot 17, the clamping activity seat 5 is respectively communicated with a first control joint 18 and a second control joint 19. The first control joint 18 and the second control joint 19 are respectively arranged to pass through the strip-shaped through slot 17 movably. Inside the clamping activity seat 5, on one side of the first control joint 18, a jacking access slot 20 is horizontally provided. On both sides of the upper end inside the jacking access slot 20, a lifting cylinder slot 21 is vertically provided. Vertically and symmetrically arranged at the lower end of the C-shaped lifting splint 6 are two jacking columns 22. The lower ends of the two jacking columns 22 respectively pass through the upper and lower parts of the clamping activity seat 5 through seals and are inserted into the lifting cylinder slots 21. And at the lower end of the jacking column 22 placed inside the lifting cylinder slot 21, a jacking piston 31 is provided. The first control joint 18 and the second control joint 19 extending out of the strip-shaped through slot 17 can be normally connected to the hoses of the hydraulic system. According to the weight of the volute 8 and the stay ring 9, hydraulic control or pneumatic control can be freely selected to ensure that the volute 8 can be lifted and can be in a horizontal posture.

[0020] At the upper end inside the lifting cylinder slot 21, a limiting ring is provided. On the inner peripheral side of the limiting ring, a back-pushing access slot 23 is provided. Both of the two back-pushing access slots 23 are communicated with the second control joint 19. And the inner diameter of the limiting ring is smaller than the diameter of the jacking piston 31. When the hydraulic oil enters the jacking access slot 20 from the first control joint 18, with the increase of pressure, the jacking piston 31 can push the C-shaped lifting splint 6 to lift vertically. The upper end of the C-shaped lifting splint 6 contacts the lower end of the volute 8 and pushes the volute 8. After the smaller-diameter side of the volute 8 is lifted by the C-shaped lifting splint 6, the virtual central axis of the volute 8 is in a vertical posture. At the same time, through the movement of the four clamping activity seats 5, the virtual axis of the volute 8 is coaxial with the rotating tray 2. The number of the clamping control boxes 3 can be customized according to requirements, and the minimum number should not be less than three. When the C-shaped lifting splint 6 descends, the second control joint 19 feeds the hydraulic oil. The hydraulic oil enters the two back-pushing access slots 23 through the second control joint 19 and pushes the jacking columns 22 and the C-shaped lifting splint 6 downward from above the jacking piston 31 to realize the descent and fall of the C-shaped lifting splint 6.

[0021] A lifting component is provided to support the stay ring 9. The lifting component is arranged at the upper center of the rotating tray 2 and includes a rhombus support column 15, a support frustum 10, four fixed support rods 11 and four extension support rods 12. The upper ends of the four extension support rods 12 are respectively in contact with the lower end of the stay ring 9. A rotation control base 13 is arranged at the center of the rotating tray 2. The lower end of the rotation control base 13 is rotatably inserted into the upper end of the main control base 1. A lifting control groove is formed in the rotation control base 13. A lifting control cylinder 14 is vertically arranged in the lifting control groove. The rhombus support column 15 is vertically arranged at the upper center of the lifting control cylinder 14, and the upper end of the rhombus support column 15 vertically and movably penetrates through the rotation control base 13. After the position of the volute 8 is adjusted, the stay ring 9 is placed above the four extension support rods 12 from the center of the volute 8 through a hoisting device. Then, the rhombus support column 15 is vertically pushed by the lifting control cylinder 14, so that the upper and lower end faces of the stay ring 9 are flush with the inner peripheral side of the volute 8 and are butted. Then, a contour welding is carried out through a welding manipulator. During this period, the rotating tray 2 can perform a rotation operation. When the rotating tray 2 rotates, the rotation control base 1 of the rotating tray 2 can be driven to rotate by a gear or a chain through a motor for clamping the control box 3.

[0022] The support frustum 10 is horizontally arranged at the upper end of the rhombus support column 15. Four fixed support rods 11 are horizontally and symmetrically arranged on the outer peripheral side of the support frustum 10. An extension support rod 12 is movably sleeved on one side of each of the four fixed support rods 11. One end of the extension support rod 12 away from the support frustum 10 is rotatably inserted with an adjustment screw 16 through a threaded plate. One end of the adjustment screw 16 is inserted into the center of the fixed support rod 11 through a thread. An adaptation groove 32 is formed at the upper end of one side of the clamping control box 3 close to the support frustum 10. The width of the adaptation groove 32 is greater than the width of the extension support rod 12, and the extension support rod 12 is arranged corresponding to the adaptation groove 32. The extension support rod 12 slides telescopically on the fixed support rod 11, so as to cope with stay rings 9 of different diameters. In addition, both the fixed support rod 11 and the extension support rod 12 are made of high-strength steel and can be used for the stable support of the stay ring 9.

[0023] Embodiment 2: On the basis of Embodiment 1, a cooperating lubrication assembly is provided to maintain the state of the clamping movable seat 5 during long-term movable use. The cooperating lubrication assembly is arranged at the upper end of the clamping movable seat 5 close to the C-shaped lifting clamping plate 6. The cooperating lubrication assembly includes an oil storage cavity 24 and a synchronous piston rod 25. Oil storage cavities 24 are respectively opened in the clamping movable seat 5 between the two lifting cylinder grooves 21. An upper end of the oil storage cavity 24 penetrates through the clamping movable seat 5 to form a piston groove. A partition plate is horizontally arranged at the center of the piston groove. The synchronous piston rod 25 is vertically and movably inserted into the center of the partition plate. Pressing pistons 26 and compression pistons 27 are respectively arranged at the upper and lower ends of the synchronous piston rod 25 penetrating through the partition plate. The upper end of the pressing piston 26 extends out of the piston groove. Return springs 28 are sleeved on the synchronous piston rod 25 between the pressing piston 26 and the partition plate. When the C-shaped lifting clamping plate 6 descends to the maximum extent, the lower end of the C-shaped lifting clamping plate 6 contacts the upper end of the pressing piston 26. A valve groove is opened at the upper end of the lower end of the oil storage cavity 24 communicating with the control screw groove 29. A one-way valve 30 is inserted into the valve groove. Under normal use conditions, the C-shaped lifting clamping plate 6 and the pressing piston 26 are in a separated state. When lubrication of the control screw groove 29 and the control screw rod 7 is required, the C-shaped lifting clamping plate 6 continues to move downward. The C-shaped lifting clamping plate 6 pushes the pressing piston 26 and the compression piston 27 downward. At this time, the air pressure in the oil storage cavity 24 changes, and a small amount of lubricating oil in the oil storage cavity 24 is pushed into the control screw groove 29 for movable lubrication of the clamping movable seat 5 and the control screw rod 7, so as to maintain the stable use of the clamping movable seat 5.

[0024] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A clamping assembly for profile welding of a turbine stay ring and a spiral case, characterized in that Comprising: A main control base station (1), a rotating tray (2) is rotatably provided at the upper end of the main control base station (1), a volute (8) is provided at the upper end of the rotating tray (2) through a clamping assembly, the clamping assembly includes four clamping control boxes (3), a clamping movable seat (5) is movably provided in each clamping control box (3), a C-shaped lifting clamping plate (6) is provided at the upper end of each clamping movable seat (5) in a lifting manner, and the upper end of the C-shaped lifting clamping plate (6) is in contact with the lower end of the volute (8); A lifting assembly, the lifting assembly is provided at the center of the upper end of the rotating tray (2), the lifting assembly includes a rhombic support column (15), a support frustum (10), four fixed support rods (11) and four extension support rods (12), and the upper ends of the four extension support rods (12) are respectively in contact with the lower end of the seat ring (9); A matching lubrication assembly, the matching lubrication assembly is provided at the upper end of the clamping movable seat (5) close to the C-shaped lifting clamping plate (6), and the matching lubrication assembly includes an oil storage cavity (24) and a synchronous piston rod (25).

2. The clamping assembly for the conformal welding of a water turbine stay ring and a spiral case according to claim 1, wherein: An adaptation activity groove (4) is provided at the upper end of each clamping control box (3), a control lead screw (7) is horizontally provided in each adaptation activity groove (4), a control screw groove (29) is vertically provided through the center of the lower end of the clamping movable seat (5), the clamping movable seat (5) is horizontally slidably inserted into the adaptation activity groove (4) and is movably sleeved on the control lead screw (7) through the control screw groove (29).

3. A clamping assembly for profiling welding of a turbine stay ring and a spiral case according to claim 2, characterized in that: A strip-shaped through groove (17) is provided through the clamping control box (3) on one side of each adaptation activity groove (4), a first control joint (18) and a second control joint (19) are respectively communicated and provided on one side of the clamping movable seat (5) located in the strip-shaped through groove (17), and the first control joint (18) and the second control joint (19) are respectively movably provided through the strip-shaped through groove (17).

4. A clamping assembly for profiling welding of a turbine stay ring and a spiral case according to claim 3, characterized in that: A jacking access groove (20) is horizontally provided on one side of the clamping movable seat (5) where the first control joint (18) is located, lifting cylinder grooves (21) are vertically provided on both sides of the upper end in the jacking access groove (20), two jacking columns (22) are vertically symmetrically provided at the lower end of the C-shaped lifting clamping plate (6), the lower ends of the two jacking columns (22) respectively pass through the upper and lower parts of the clamping movable seat (5) through a sealing ring and are inserted into the lifting cylinder grooves (21), and a jacking piston (31) is provided at the lower end of the jacking column (22) placed in the lifting cylinder groove (21).

5. The clamping assembly for the conformal welding of a water turbine stay ring and a spiral case according to claim 4, characterized in that: A limiting ring is provided at the upper end in the lifting cylinder groove (21), a return push access groove (23) is provided on the inner peripheral side of the limiting ring, both return push access grooves (23) are communicated with the second control joint (19), and the inner diameter of the limiting ring is smaller than the diameter of the jacking piston (31).

6. The clamping assembly for the conformal welding of the turbine stay ring and the volute according to claim 5, characterized in that: A rotation control seat (13) is provided at the center of the rotating tray (2), the lower end of the rotation control seat (13) is rotatably inserted into the upper end of the main control base station (1), a lifting control groove is provided in the rotation control seat (13), a lifting control cylinder (14) is vertically provided in the lifting control groove, the rhombic support column (15) is vertically provided at the center of the upper end of the lifting control cylinder (14), and the upper end of the rhombic support column (15) is vertically movably provided through the rotation control seat (13).

7. A clamping assembly for conforming welding of a turbine stay ring and a spiral case according to claim 6, characterized in that: The support frustum (10) is horizontally arranged at the upper end of the rhombic support column (15). Four fixed support rods (11) are horizontally and symmetrically arranged on the outer peripheral side of the support frustum (10). An extension support rod (12) is movably sleeved on one side of each of the four fixed support rods (11). An adjustment screw rod (16) is rotationally inserted through a threaded plate on the side of the extension support rod (12) away from the support frustum (10). One end of the adjustment screw rod (16) is fixedly inserted into the center of the fixed support rod (11) through threads.

8. A clamping assembly for profiling welding of a water turbine stay ring and a spiral case according to claim 7, characterized in that: At the upper end of one side of the clamping control box (3) close to the support frustum (10), an adaptation groove (32) is opened. The width of the adaptation groove (32) is greater than the width of the extension support rod (12), and the extension support rod (12) is arranged corresponding to the adaptation groove (32).

9. The clamping assembly for profiling welding of a turbine stay ring and a volute according to claim 8, characterized in that: An oil storage cavity (24) is opened between the two lifting cylinder grooves (21) in the clamping movable seat (5). A piston groove is opened through the upper end of the oil storage cavity (24) in the clamping movable seat (5). A partition plate is horizontally arranged at the center in the piston groove. A synchronous piston rod (25) is vertically and movably inserted through the center of the partition plate. Pressing pistons (26) and compression pistons (27) are respectively arranged at the upper and lower ends of the synchronous piston rod (25) penetrating through the partition plate. The upper end of the pressing piston (26) extends out of the piston groove. A return spring (28) is sleeved on the synchronous piston rod (25) between the pressing piston (26) and the partition plate. When the C-shaped lifting clamp plate (6) descends to the maximum extent, the lower end of the C-shaped lifting clamp plate (6) contacts the upper end of the pressing piston (26).

10. A clamping assembly for profiling welding of a turbine stay ring and a spiral case according to claim 9, characterized in that: A valve groove is opened at the upper end of the control screw groove (29) communicated with the lower end of the oil storage cavity (24). A one-way valve (30) is inserted into the valve groove.

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