Dismounting device for movable guide vane crank arm of water turbine

Abstract

The utility model discloses a dismounting device for a movable guide vane crank arm of a water turbine, and relates to the technical field of water and electricity. The dismounting device for the movable guide vane crank arm of the water turbine comprises a support used for being detachably connected with the movable guide vane crank arm, an adjusting screw in threaded connection with the support is arranged on the support, the two ends of the adjusting screw are an operation end and an abutting end respectively, and the abutting end is used for abutting against one end of a movable guide vane shaft. When the dismounting device for the movable guide vane crank arm of the water turbine is used for dismounting and operating the movable guide vane crank arm, the support is firstly connected with the movable guide vane crank arm, then the abutting end of the adjusting screw abuts against one end of the movable guide vane shaft, then the adjusting screw is controlled to rotate so as to drive the support and the movable guide vane crank arm to move, and the movable guide vane crank arm is dismounted. Therefore, the movable guide vane crank arm is detached from the movable guide vane shaft, the detaching difficulty is reduced, the detaching efficiency is improved, and damage to the movable guide vane crank arm can be avoided.

Description

Technical Field

[0001] The present application relates to the field of hydropower technology, and in particular to a device for disassembling a movable guide vane crank arm of a water turbine. Background Art

[0002] The movable guide vane crank arm of the turbine is one of the important components in the transmission mechanism of the movable guide vane. The movable guide vane crank arm is sleeved on the movable guide vane shaft. The inner wall of the movable guide vane crank arm is in close contact with the outer surface of the movable guide vane shaft, and a tapered pin is used to transmit torque between the two.

[0003] During unit maintenance, it is often necessary to disassemble the movable guide vane crank arm. However, due to the small clearance between the movable guide vane crank arm and the movable guide vane shaft, disassembly is difficult, time-consuming and labor-intensive, and there is a risk of damage to the movable guide vane crank arm or the movable guide vane shaft. Utility Model Content

[0004] The purpose of the present application is to provide a device for disassembling a movable guide vane crank arm of a water turbine, so as to solve the problem that the movable guide vane crank arm is difficult to disassemble.

[0005] The technical solution adopted by the present application to solve its technical problem is: a disassembly device for a movable guide vane crank arm of a turbine, comprising a support for detachably connecting to the movable guide vane crank arm, the support is provided with an adjustment screw threadedly connected to the support, the two ends of the adjustment screw are respectively an operating end and an abutment end, and the abutment end is used to abut against one end of the movable guide vane shaft.

[0006] Furthermore, the support includes a support plate having an internal threaded hole extending therethrough, and the adjusting screw is threadedly connected in the internal threaded hole.

[0007] Furthermore, the support plate is circular.

[0008] Furthermore, the support plate is used to be connected to the movable guide vane crank arm via a fastener, and the fastener includes a fixing bolt that passes through the support plate and is threadedly connected to the movable guide vane crank arm.

[0009] Furthermore, a reinforcement plate is provided on the support plate.

[0010] Furthermore, the support plate is provided with lifting ears.

[0011] Furthermore, the abutting end is used to abut against one end of the movable guide vane shaft through a pad.

[0012] Furthermore, the operating end is provided with an operating hole arranged along the radial direction of the adjusting screw.

[0013] Furthermore, an operating rod is inserted into the operating hole.

[0014] Furthermore, a limit block is provided on at least one end of the operating rod.

[0015] Beneficial effects of this application:

[0016] The turbine movable guide vane crank arm disassembly device provided in the embodiment of the present application is used for disassembling the movable guide vane crank arm. During operation, the support is first connected to the movable guide vane crank arm, and then the abutting end of the adjusting screw is abutted against one end of the movable guide vane shaft. Then, the adjusting screw is controlled to rotate to drive the support and the movable guide vane crank arm to move, and then the movable guide vane crank arm is removed from the movable guide vane shaft, which reduces the difficulty of disassembly, improves the disassembly efficiency, and avoids damage to the movable guide vane crank arm. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a structural schematic diagram of a hydraulic turbine movable guide vane crank arm disassembly device provided in an embodiment of the present application;

[0019] Figure 2 It is a structural diagram of the support;

[0020] Figure 3 yes Figure 2 A top view of

[0021] Figure 4 It is a schematic diagram of the connection structure between the adjusting screw and the operating rod.

[0022] Reference numerals:

[0023] 1- movable guide vane crank arm;

[0024] 2- movable guide vane shaft;

[0025] 3- support;

[0026] 31- support plate;

[0027] 311-internal thread hole;

[0028] 312-bolt hole;

[0029] 32- reinforcement plate;

[0030] 33- hanging lug;

[0031] 4-Adjust the screw;

[0032] 41-operation terminal;

[0033] 42-butting end;

[0034] 43-operation hole;

[0035] 5-Fixing bolts;

[0036] 6- pad;

[0037] 7- Operating lever;

[0038] 8-Limiting block. DETAILED DESCRIPTION

[0039] In order to make the purpose, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0040] It should be noted that similar numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings. In addition, the embodiments and features in the embodiments of this application can be combined with each other without conflict.

[0041] In the description of the embodiments of the present application, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the accompanying drawings, or is the orientation or positional relationship in which the product of the application is usually placed when in use, or is the orientation or positional relationship commonly understood by those skilled in the art. The terms "disposed", "opened", "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, and an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal connection of two elements.

[0042] See also Figure 1 A device for disassembling a movable guide vane crank arm of a turbine provided in an embodiment of the present application comprises a support 3 for being detachably connected to a movable guide vane crank arm 1, an adjusting screw 4 threadedly connected to the support 3 is provided, and the two ends of the adjusting screw 4 are respectively an operating end 41 and an abutment end 42, and the abutment end 42 is used to abut against one end of a movable guide vane shaft 2.

[0043] See also Figure 1 The present application provides a hydraulic turbine movable guide vane crank arm disassembly device, which is used to disassemble the movable guide vane crank arm 1. The specific disassembly process is as follows:

[0044] First, place the support 3 on the top of the movable guide vane crank arm 1, and connect the two together detachably; manually hold the operating end 41 of the adjusting screw 4 and apply force or use a tool such as a wrench to apply force to the operating end 41 of the adjusting screw 4 to make the adjusting screw 4 rotate clockwise, and then make the abutting end 42 of the adjusting screw 4 approach the movable guide vane shaft 2 and abut against the upper end of the movable guide vane shaft 2; then, apply force to the operating end 41 of the adjusting screw 4 with a tool such as a wrench to make the adjusting screw 4 continue to rotate clockwise. At this time, the support 3 moves upward on the adjusting screw 4, and the support 3 drives the movable guide vane crank arm 1 to continue to move upward until the movable guide vane crank arm 1 is removed from the movable guide vane shaft 2.

[0045] The turbine movable guide vane crank arm disassembly device provided in the embodiment of the present application is easy to operate, reduces the difficulty of disassembling the movable guide vane crank arm 1, improves the disassembly efficiency, and can avoid damage to the movable guide vane crank arm 1.

[0046] In some embodiments, see Figure 2 , Figure 3 The support 3 includes a support plate 31 , and the support plate 31 has an internal threaded hole 311 extending therethrough, and the adjusting screw 4 is threadedly connected in the internal threaded hole 311 .

[0047] Exemplarily, the support plate 31 is circular and made of a whole piece of steel plate. It should be ensured to have a certain rigidity and strength to avoid deformation during use. For example, the support plate 31 is made of a 70 mm thick steel plate. An internal threaded hole 311 is provided at the center of the support plate 31, and the adjustment screw 4 is threadedly connected in the internal threaded hole 311. Exemplarily, the adjustment screw 4 is a hexagonal head screw. For example, the model of the adjustment screw 4 is M48×400. When in use, the position of the support plate 31 on the adjustment screw 4 can be changed by simply turning the adjustment screw 4.

[0048] In some embodiments, see Figure 1 , Figure 2 , Figure 3 The support plate 31 is used to be connected to the movable guide vane crank arm 1 through a fastener, and the fastener includes a fixing bolt 5 that passes through the support plate 31 and is threadedly connected to the movable guide vane crank arm 1.

[0049] Exemplarily, the fastener includes at least two fixing bolts 5, which are evenly distributed around the internal threaded hole 311, the support plate 31 is provided with bolt holes 312 for the fixing bolts 5 to pass through, and the movable guide vane crank arm 1 is provided with screw holes threadedly connected to the fixing bolts 5. The fixing bolts 5 are hexagonal head bolts. For example, the model of the fixing bolts 5 is M24×100.

[0050] In order to further improve the strength and rigidity of the support plate 31, see Figure 2, a reinforcing plate 32 is provided on the support plate 31. Exemplarily, the reinforcing plate 32 is an annular structure, and the reinforcing plate 32 is made of a 15 mm thick steel plate and welded to the lower surface of the support plate 31. When the reinforcing plate 32 is arranged at a position facing the bolt hole 312, a through hole for the fixing bolt 5 to pass through is provided at a position facing the bolt hole 312 on the reinforcing plate 32.

[0051] In order to facilitate the lifting of the support plate 31, see Figure 2 , Figure 3 The support plate 31 is provided with a lifting lug 33. Exemplarily, the lifting lug 33 includes two lifting lugs 33, which are welded to the upper surface of the support plate 31 and symmetrically arranged on both sides of the internal threaded hole 311.

[0052] In some embodiments, see Figure 1 , Figure 4 , the abutting end 42 is used to abut against one end of the movable guide vane shaft 2 through the pad 6. During operation, the pad 6 is first placed on the end of the movable guide vane shaft 2, and then the adjusting screw 4 is rotated so that the abutting end 42 of the adjusting screw 4 abuts against the pad 6; with this structure, the end of the movable guide vane shaft 2 can be prevented from being damaged during the rotation of the adjusting screw 4. Exemplarily, the pad 6 is circular and made of steel plate.

[0053] In some embodiments, see Figure 4 The operating end 41 is provided with an operating hole 43 arranged along the radial direction of the adjusting screw 4, and an operating rod 7 is inserted into the operating hole 43. The operating rod 7 can form a lever structure, and the adjusting screw 4 can be driven to rotate by the operating rod 7 by simply rotating the operating rod 7, which is not only labor-saving and easy to operate, but also does not require special tools. During the operation, in order to prevent the operating rod 7 from escaping from the operating hole 43, a limit block 8 is provided at least at one end of the operating rod 7. The limit block 8 and the operating rod 7 can be integrally formed, welded, or threaded.

[0054] The above is only a preferred embodiment of the present application and does not constitute any form of limitation to the present application. Based on the technical essence of the present application and within the spirit and principles of the present application, any simple modification, equivalent replacement and improvement of the above embodiments shall still fall within the protection scope of the technical solution of the present application.

Claims

1. A device for disassembling a movable guide vane arm of a water turbine, characterized in that: The invention comprises a support (3) for being detachably connected to a movable guide vane crank arm (1); the support (3) is provided with an adjustment screw (4) threadedly connected thereto; the two ends of the adjustment screw (4) are respectively an operating end (41) and an abutment end (42); the abutment end (42) is used to abut against one end of the movable guide vane shaft (2).

2. The device for disassembling the movable guide vane arm of a water turbine according to claim 1, characterized in that: The support (3) comprises a support plate (31), the support plate (31) has an internal threaded hole (311) extending therethrough, and the adjustment screw (4) is threadedly connected in the internal threaded hole (311).

3. The device for disassembling the movable guide vane arm of a water turbine according to claim 2, characterized in that: The supporting plate (31) is circular.

4. The device for disassembling the movable guide vane arm of a water turbine according to claim 2, characterized in that: The support plate (31) is used to be connected to the movable guide vane crank arm (1) via a fastener, and the fastener comprises a fixing bolt (5) that passes through the support plate (31) and is threadedly connected to the movable guide vane crank arm (1).

5. The hydraulic turbine movable guide vane crank arm disassembly device according to claim 2, characterized in that: A reinforcing plate (32) is provided on the supporting plate (31).

6. The device for disassembling the movable guide vane arm of a water turbine according to claim 2, characterized in that: The support plate (31) is provided with a lifting lug (33).

7. The device for disassembling the movable guide vane arm of a water turbine according to claim 1, characterized in that: The abutting end (42) is used to abut against one end of the movable guide vane shaft (2) through a pad (6).

8. The device for disassembling the movable guide vane arm of a water turbine according to claim 1, characterized in that: The operating end (41) is provided with an operating hole (43) arranged along the radial direction of the adjusting screw (4).

9. The device for disassembling the movable guide vane arm of a water turbine according to claim 8, characterized in that: An operating rod (7) is inserted into the operating hole (43).

10. The device for disassembling the movable guide vane arm of a water turbine according to claim 9, characterized in that: A limit block (8) is provided at at least one end of the operating rod (7).

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