Device for disassembling crank arm and water-turbine generator set
By designing a device for disassembling the bend arm, the ring arm assembly and lifter are used to drive the bend arm and the movable guide vane to separate, the problem of difficulty in disassembly and safety hazards during the disassembly of the hydropower station unit is solved, and safer and more convenient disassembly is achieved process.
Patent Information
- Application Number
- CN202420868710.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-04-24
- Publication Date
- 2024-12-13
- Estimated Expiration
- 2034-04-24
AI Technical Summary
During the maintenance of the hydropower station unit, the gap between the movable guide vane crook arm and the guide vane journal matching surface is small, and it is difficult to disassemble the conventional disassembly tooling, which poses safety hazards.
A device for disassembling the crooked arm is designed, including a ring arm assembly and a lifter. By disassembling the ring sleeve on the outer peripheral surface of the crooked arm, it drives the crooked arm and the movable guide vane to separate, reducing the difficulty of disassembly.
It effectively reduces the difficulty of disassembly, reduces the working intensity of disassembly personnel, and improves the safety of the disassembly process.
Smart Images
Figure CN222155455U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of disassembly of a water turbine unit, in particular to a device for disassembling a crank arm and a water turbine generator unit. Background Art
[0002] During the maintenance of a hydropower station unit, it is necessary to disassemble the water guide mechanism. The clearance between the movable guide vane crank arm and the movable guide vane shaft neck is very small, and the crank arm is generally difficult to disassemble and lift. There are only three bolt holes on the movable guide vane crank arm of the hydropower station, and it is impossible to disassemble it using conventional gate-shaped tooling (the gate-shaped tooling requires four bolt holes connected to form a rectangle and the intersection of the diagonal lines of the rectangle is located at the center of the movable guide vane). During the disassembly process of the above crank arm, if conventional disassembly tooling is used, it will be difficult to disassemble and there will be danger. Utility Model Content
[0003] Therefore, the technical problem to be solved by the utility model is to overcome the defects of great difficulty and danger in the disassembly process of the crank arm of the hydropower station unit in the prior art if conventional disassembly tooling is used, thereby providing a device for disassembling the crank arm and a hydro-turbine generator set.
[0004] In order to solve the above problems, the utility model provides a device for disassembling a crank arm, comprising:
[0005] A ring arm assembly, the ring arm assembly comprising a cross arm and a disassembly ring, the disassembly ring is connected to the cross arm, the disassembly ring is suitable for being sleeved on the outer circumference of the crank arm, the disassembly ring is connected to the crank arm, and the inner circumference of the crank arm is suitable for being sleeved on the outer circumference of the movable guide vane;
[0006] A lifter, the upper surface of the lifter is in contact with the lower surface of the cross arm, the lower surface of the lifter is in contact with the upper surface of the movable guide vane, the lifter rises to apply an upward force to the disassembly ring through the cross arm, and the disassembly ring drives the crank arm and the movable guide vane to separate, thereby disassembling the lower crank arm.
[0007] Optionally, a plurality of blocks are provided on the outer peripheral surface of the crank arm, and the disassembly ring is provided below the blocks.
[0008] Optionally, the disassembly ring includes two half rings, which are combined to form a ring shape, and a vertical arm is provided on the outer peripheral surface of each half ring.
[0009] Optionally, each of the vertical arms is provided with a rectangular hole, the rectangular holes of the two vertical arms are arranged correspondingly, and the cross arm passes through the two rectangular holes respectively.
[0010] Optionally, a limiting hole is provided at each end of the cross arm, and a limiting block is provided in each limiting hole.
[0011] Optionally, two ends of the opening of each half ring are respectively provided with a connecting end, and the connecting end of each half ring is connected to the connecting end of another half ring through a fastener.
[0012] Optionally, the half ring is fixedly connected to the vertical arm by welding or clamping.
[0013] A hydroelectric generator set comprises the above-mentioned device for disassembling a crank arm.
[0014] The technical solution of the utility model has the following advantages:
[0015] 1. The device for disassembling a crank arm provided by the utility model comprises: a ring arm assembly, provided with a cross arm and a disassembly ring, the disassembly ring is connected to the cross arm, the disassembly ring is suitable for being sleeved on the outer peripheral surface of the crank arm, the disassembly ring is connected to the crank arm, and the inner peripheral surface of the crank arm is suitable for being sleeved on the outer peripheral surface of the movable guide vane; a lifter, the upper surface of the lifter is in contact with the lower surface of the cross arm, the lower surface of the lifter is in contact with the upper surface of the movable guide vane, the lifter rises to apply an upward force to the disassembly ring through the cross arm, and the disassembly ring drives the crank arm and the movable guide vane to separate, thereby disassembling the lower crank arm. During the disassembly process, the lifter rises upward to drive the cross arm to move upward, and the cross arm drives the disassembly ring to move upward to slowly drive the crank arm and the movable guide vane to separate, thereby disassembling the lower crank arm, so as to reduce the difficulty of disassembly and reduce the intensity of personnel disassembly.
[0016] 2. The utility model provides a device for disassembling a crank arm, wherein a plurality of blocks are provided on the outer circumferential surface of the crank arm, and a disassembly ring is provided below the block, and the block is connected to the disassembly ring, and the block is driven by the disassembly ring, and then the crank arm is driven to move.
[0017] 3. The device for disassembling the crank arm provided by the utility model comprises a disassembly ring including two half rings, which are enclosed to form a ring shape, and a vertical arm is arranged on the outer circumference of each half ring, so that the half ring encloses the crank arm.
[0018] 4. The utility model provides a device for disassembling the crank arm, each vertical arm is provided with a rectangular hole, the rectangular holes of the two vertical arms are arranged correspondingly, the cross arm passes through the two rectangular holes respectively, the cross arm passes through the rectangular holes to be connected with the vertical arm, and the cross arm is subjected to an upward force to drive the vertical arm to move upward.
[0019] 5. In the device for disassembling the crank arm provided by the utility model, a limit hole is respectively provided at both ends of the cross arm, and a limit block is provided in each limit hole to limit the movement of the cross arm.
[0020] 6. The device for disassembling the crank arm provided by the utility model has a connecting end at each end of the opening of each half ring, and the connecting end of each half ring is connected to the connecting end of the other half ring by a fastener so that the two half rings form a ring, and the two half rings are fixed by the fastener.
[0021] 7. In the device for disassembling the crank arm provided by the utility model, the half ring and the vertical arm are fixedly connected by welding or clamping, thereby realizing the fixed connection between the half ring and the vertical arm.
[0022] 8. The hydro-generator set provided by the utility model includes the above-mentioned device for disassembling the crank arm. Since the device for disassembling the crank arm described in any one of the above items is adopted, it has the advantages described in any one of the above items. BRIEF DESCRIPTION OF THE DRAWINGS
[0023] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.
[0024] Figure 1 A schematic diagram of the connection between the device for disassembling the crank arm and the crank arm provided in an embodiment of the utility model;
[0025] Figure 2 A schematic diagram of a device for disassembling a crank arm provided in an embodiment of the utility model;
[0026] Figure 3 A three-dimensional diagram of the connection between the half ring and the vertical arm provided in the embodiment of the utility model;
[0027] Figure 4 A front view of the connection between the half ring and the vertical arm provided in the embodiment of the utility model;
[0028] Figure 5 A top view of the connection between the half ring and the vertical arm provided in an embodiment of the utility model;
[0029] Figure 6 It is a front view of the cross arm provided in the embodiment of the utility model.
[0030] Explanation of the accompanying drawings: 1. horizontal arm; 2. disassembly ring; 3. vertical arm; 4. half ring; 5. limiting hole; 6. limiting block; 7. rectangular hole; 8. connecting end; 9. fastener; 10. movable guide vane; 11. lifter; 12. crank arm; 13. stop block. DETAILED DESCRIPTION
[0031] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.
[0032] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.
[0033] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.
[0034] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.
[0035] like Figure 1 A specific embodiment of the device for disassembling the crank arm 12 shown in FIG. 6 includes: a ring arm assembly, and a lifter 11 for pushing the ring arm assembly to move upward. Specifically, the lifter 11 is a jack.
[0036] like Figure 1 , Figure 2 and Figure 3 As shown, the ring arm assembly includes a cross arm 1 and a disassembly ring 2, wherein the disassembly ring 2 is suitable for being sleeved on the outer circumference of the crank arm 12, and the inner circumference of the crank arm 12 is suitable for being sleeved on the outer circumference of the movable guide vane 10. Figure 1 , Figure 2 As shown, a plurality of blocks 13 are provided on the outer circumference of the crank arm 12, and the disassembly ring 2 is provided below the block 13. The block 13 blocks the disassembly ring 2, so that the force applied to the disassembly ring 2 is transmitted to the crank arm 12 through the block 13. Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, the disassembly ring 2 includes two half rings 4, which are arranged correspondingly, and the two half rings 4 are enclosed to form a ring, and a vertical arm 3 is arranged on the outer peripheral surface of each half ring 4, and the two half rings 4 are enclosed to enclose the outer periphery of the crank arm 12, and the two half rings 4 are symmetrically arranged. It should be noted that the half ring 4 is fixedly connected to the vertical arm 3 by welding.
[0037] like Figure 3 , Figure 4 , Figure 5 and Figure 6 As shown, each vertical arm 3 is provided with a rectangular hole 7, and the rectangular holes 7 of the two vertical arms 3 are correspondingly arranged, and the cross arm 1 passes through the two rectangular holes 7 respectively. A limit hole 5 is provided at each end of the cross arm 1, and a limit block 6 is provided in each limit hole 5. The limit block 6 is used to limit any movement of the cross arm 1, and the cross arm 1 serves to connect the two vertical arms 3.
[0038] like Figure 2 , Figure 3 , Figure 4 and Figure 5 As shown, a connection end 8 is provided at both ends of the opening of each half ring 4, and the connection end 8 of each half ring 4 is connected to the connection end 8 of the other half ring 4 through a fastener 9. Specifically, the fastener 9 is a bolt.
[0039] A hydroelectric generator set includes the above-mentioned device for disassembling the crank arm 12, and also includes the crank arm 12 and the movable guide vane 10, wherein the inner circumference of the crank arm 12 is sleeved on the outer circumference of the movable guide vane 10.
[0040] Before disassembling the crank arm 12, the stopper 13 is welded to the outer circumference of the crank arm 12, and the half ring 4 is enclosed below the stopper 13, and the connecting ends 8 of the two corresponding half rings 4 are connected by the fasteners 9. Next, the cross arm 1 passes through the two rectangular holes 7 respectively, and is placed in the limit hole 5 through the limit block 6 to limit the movement of the cross arm 1. Finally, the lifter 11 is placed between the upper surface of the movable guide vane 10 and the lower surface of the cross arm 1, so that the upper surface of the lifter 11 fits the lower surface of the cross arm 1, and the lower surface of the lifter 11 contacts the upper surface of the movable guide vane 10. During the specific implementation process, the lifting end of the lifter 11 rises to apply an upward force to the disassembly ring 2 through the cross arm 1, and through the principle of reaction force (that is, the disassembly ring 2 applies an upward force to the crank arm 12 and the movable guide vane 10 is subjected to a downward force), the movable guide vane 10 remains stationary and the crank arm 12 moves upward relative to the movable guide vane 10 until the crank arm 12 and the movable guide vane 10 are separated.
[0041] As an alternative implementation, the lifter 11 may also be other equipment such as a lifting cylinder.
[0042] As an alternative embodiment, the half ring 4 is fixedly connected to the vertical arm 3 by means of a clamping connection.
[0043] Obviously, the above embodiments are merely examples for clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from them are still within the protection scope of the invention.
Claims
1. A device for disassembling a crank arm, It is characterized in that include: A ring arm assembly, the ring arm assembly comprising a cross arm (1) and a disassembly ring (2), the disassembly ring (2) being connected to the cross arm (1), the disassembly ring (2) being suitable for being sleeved on the outer peripheral surface of a crank arm (12), the disassembly ring (2) being connected to the crank arm (12), and the inner peripheral surface of the crank arm (12) being suitable for being sleeved on the outer peripheral surface of a movable guide vane (10); A lifter (11), the upper surface of the lifter (11) is in contact with the lower surface of the cross arm (1), and the lower surface of the lifter (11) is in contact with the upper surface of the movable guide vane (10). The lifter (11) rises to apply an upward force to the disassembly ring (2) through the cross arm (1), and the disassembly ring (2) drives the crank arm (12) and the movable guide vane (10) to separate, thereby disassembling the lower crank arm (12).
2. The device for disassembling a crank arm according to claim 1, It is characterized in that A plurality of stoppers (13) are provided on the outer peripheral surface of the crank arm (12), and the disassembly ring (2) is arranged below the stoppers (13).
3. The device for disassembling a crank arm according to claim 2, It is characterized in that The disassembly ring (2) comprises two half rings (4), the two half rings (4) are enclosed to form a ring shape, and a vertical arm (3) is provided on the outer peripheral surface of each half ring (4).
4. The device for disassembling a crank arm according to claim 3, It is characterized in that Each of the vertical arms (3) is provided with a rectangular hole (7), the rectangular holes (7) of the two vertical arms (3) are arranged correspondingly, and the horizontal arm (1) passes through the two rectangular holes (7) respectively.
5. The device for disassembling a crank arm according to claim 4, It is characterized in that A limiting hole (5) is respectively provided at both ends of the cross arm (1), and a limiting block (6) is provided in each limiting hole (5).
6. The device for disassembling a crank arm according to claim 4, It is characterized in that A connecting end (8) is provided at each of the two ends of the opening of each half ring (4), and the connecting end (8) of each half ring (4) is connected to the connecting end (8) of another half ring (4) via a fastener (9).
7. The device for disassembling a crank arm according to claim 6, It is characterized in that The half ring (4) is fixedly connected to the vertical arm (3) by welding or clamping.
8. A hydroelectric generator set, It is characterized in that A device for disassembling a crank arm (12) comprising the device described in any one of claims 1 to 7.