Lifting tool for runner of large water turbine

Abstract

The utility model provides a large water turbine runner lifting tool which comprises a balance beam, two ends of the balance beam are connected with a bridge crane, an installation platform is arranged in the middle of the balance beam, a through hole for a lifting shaft to penetrate through is formed in the installation platform, the lifting shaft is installed on the installation platform through a bearing, a lifting ring is arranged at the upper end of the lifting shaft, and a connecting frame is arranged at the lower end of the lifting shaft. The connecting frame is connected with the rotating wheel through bolts. The lifting tool is used for lifting the large rotating wheel, and the elevation and angle of the rotating wheel can be conveniently adjusted.

Description

Technical Field

[0001] The utility model relates to the field of water turbine maintenance and hoisting, in particular to a large water turbine runner hoisting tool. Background Art

[0002] Before and after the inspection of the runner room, it is necessary to lift the runner room with a lifting tool, lift it out of the runner room or lift it to the runner room. Conventional lifting tools use lifting beams or lifting tools to directly connect the runner and lift it through a bridge crane, but this lifting tool or lifting method is only suitable for small and medium-sized runners. The lifting tool can enter the runner room at the same time to adjust the elevation and angle of the runner. However, for large runners, such as the runner of a 170MW turbine, which weighs 600 tons, higher requirements are placed on the size and strength of the lifting equipment. For large runners, due to the large size of the lifting tool, it cannot enter the runner room and can only move above the runner room. As a result, after the runner is lifted into the runner room, the runner cannot reach the installation elevation, causing inconvenience in operation. Summary of the invention

[0003] The technical problem to be solved by the utility model is to provide a large-scale water turbine runner lifting tool, which is used for lifting the large-scale runner and conveniently adjusting the elevation and angle of the runner.

[0004] In order to solve the above technical problems, the technical solution adopted by the utility model is: a large turbine runner lifting tool, including a balance beam, both ends of the balance beam are connected to the bridge crane, a mounting platform is provided in the middle of the balance beam, a through hole is provided on the mounting platform for the lifting shaft to pass through, the lifting shaft is installed on the mounting platform through a bearing, a lifting ring is provided at the upper end of the lifting shaft, a connecting frame is provided at the lower end of the lifting shaft, and the connecting frame is connected to the runner through bolts.

[0005] In a preferred solution, lifting ears are symmetrically arranged on the upper side of the balance beam.

[0006] In the preferred scheme, connecting mechanisms are respectively provided at both ends of the balance beam, and the connecting mechanisms are used to connect with the suspension plate of the bridge crane. An interface is provided on the balance beam corresponding to the connecting mechanism, and ear plates are provided on both sides of the interface corresponding to the interface. The suspension plate of the bridge crane is arranged in the interface, and the connecting mechanism includes a screw bracket arranged on one side of one group of ear plates, the screw cooperates with the nut on the screw bracket, the suspension shaft is connected to the screw, and the suspension shaft is inserted into the suspension holes of the ear plate and the suspension plate of the bridge crane at the same time, and a handwheel is provided at one end of the screw.

[0007] In a preferred solution, the balance beam is in an I-shape, and four sets of connection mechanisms are provided at both ends of the balance beam.

[0008] The utility model provides a large-scale water turbine runner lifting tool, which has the following beneficial effects:

[0009] 1. For lifting of large runners, when the balance beam is too large to enter the runner chamber, the runner can be lifted downward to a suitable height to ensure the installation of the runner, which is suitable for lifting of large runners.

[0010] 2. The lifting shaft can rotate relative to the balance beam, so as to facilitate the adjustment of the angle of the wheel and facilitate the installation of the wheel.

[0011] 3. The connection mechanism is set up, and the connecting screw is passed through the lifting hole of the bridge crane hanging plate and the nut on the screw bracket to achieve a closed connection, improve the connection strength, prevent unhooking, and improve safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0013] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 It is a top view of the utility model;

[0015] Figure 3 for Figure 1 The enlarged view of point A in the middle;

[0016] Figure 4 for Figure 1 Enlarged view of point B:

[0017] In the figure: balance beam 1, mounting platform 101, lifting ear 102, interface 103, ear plate 104; bridge crane 2; lifting shaft 3; bearing 4; lifting ring 5; connecting frame 6; connecting mechanism 7, screw bracket 701, screw 702, lifting shaft 703, hand wheel 704; rotating wheel 8. DETAILED DESCRIPTION

[0018] Embodiment 1:

[0019] like Figure 1~2 As shown, a large-scale water turbine runner lifting tool includes a balance beam 1. The balance beam 1 is an I-shaped structure in a top view. A plurality of reinforcing ribs are provided on the balance beam 1 to improve the strength of the entire balance beam 1. Both ends of the balance beam 1 are connected to a bridge crane 2, which can be connected by a hook and a lifting ear.

[0020] like Figure 1 and 4As shown, a mounting platform 101 is provided in the middle of the balance beam 1, and a through hole is provided on the mounting platform 101 for the lifting shaft 3 to pass through. The lifting shaft 3 is installed on the mounting platform 101 through a bearing 4. The bearing 4 is a thrust spherical roller bearing. Specifically, the shaft ring of the thrust spherical roller bearing is connected to the lifting shaft 3. An annular protrusion can be provided on the lifting shaft 3, and the annular protrusion is welded or bolted to the shaft ring of the thrust spherical roller bearing. The seat ring of the thrust spherical roller bearing is connected to the mounting platform 101, so that the lifting shaft 3 can rotate relative to the balance beam 1. A lifting ring 5 is provided at the upper end of the lifting shaft 3, and a connecting frame 6 is provided at the lower end of the lifting shaft 3. The connecting frame 6 is connected to the rotating wheel 8 by bolts, and is connected to the lifting ring 5 through a lifting device. The lifting shaft 3 can be rotated, so that the installation angle of the rotating wheel 8 can be adjusted conveniently.

[0021] Preferably, the lifting lugs 102 are symmetrically arranged on the upper side of the balance beam 1. By arranging the lifting lugs 102, before the bridge crane is connected to the balance beam 1, the lifting lugs 102 can be connected to the lifting equipment to facilitate the separate lifting of the balance beam 1.

[0022] By setting a lifting shaft 3, the tool can lift the runner 8 downward to a suitable height when the balance beam 1 is too large to enter the runner chamber, thereby ensuring the installation of the runner 8. At the same time, since the lifting shaft 3 can rotate relative to the balance beam 1, it is convenient to adjust the angle of the runner 8, which is beneficial to the installation of the runner.

[0023] Embodiment 2:

[0024] Different from Example 1, connecting mechanisms 7 are provided at both ends of the balance beam 1, and the connecting mechanisms 7 are used to connect with the suspension plate of the bridge crane 2. An interface 103 is provided on the balance beam 1 corresponding to the connecting mechanism 7. The width of the interface 103 is 110 mm, and the width of the suspension plate of the bridge crane 2 is 100 mm. The suspension plate of the bridge crane 2 is arranged in the interface 103, and ear plates 104 are provided on both sides of the corresponding interface 103 on the balance beam 1. The ear plates 104 are arranged on the lower side of the main body of the balance beam 1.

[0025] The connection mechanism 7 includes a screw support 701 arranged on one side of one group of ear plates 104. The screw support 701 is a cylindrical structure. The screw 702 cooperates with the nut on the screw support 701, and the nut is fixed on the screw support 701. The suspension shaft 703 is connected to the end of the screw 702. The suspension shaft 703 is arranged horizontally. The suspension shaft 703 simultaneously penetrates the suspension holes of the ear plate 104 and the suspension plate of the bridge crane 2. A hand wheel 704 is provided at one end of the screw 702 to facilitate the rotation of the screw 702. By rotating the screw 702, the screw 702 is moved horizontally, thereby pushing the suspension shaft 703 to penetrate into or out of the suspension plate of the bridge crane 2, so as to realize the through-shaft connection between the suspension plate of the bridge crane 2 and the ear plate 104 on the balance beam 1.

[0026] The hanging shaft 703 can be set as a "T"-shaped shaft, and the diameter of the thicker end of the hanging shaft 703 is larger than the hole diameter of the ear plate 104 to prevent the hanging shaft 703 from detaching from the ear plate 104 after passing through the shaft.

[0027] like Figure 2 As shown, the balance beam 1 is in an I-shape, and four groups of connecting mechanisms 7 are arranged at both ends of the balance beam 1. The connecting mechanisms 7 at both ends are symmetrically arranged, and the connecting mechanism at one end of the balance beam 1 is symmetrically arranged front to back.

[0028] Compared with the conventional connection method of hook and lifting ear, the connection mechanism 7 is more reliable, can improve the connection strength of the bridge crane 2 to the tool, prevent the unhooking phenomenon from occurring, and improve safety.

Claims

1. A large-scale water turbine runner lifting tool, comprising a balance beam (1), both ends of the balance beam (1) being connected to a bridge crane (2), characterized in that: A mounting platform (101) is provided in the middle of the balance beam (1), and a through hole is provided on the mounting platform (101) for the lifting shaft (3) to pass through. The lifting shaft (3) is mounted on the mounting platform (101) via a bearing (4). A lifting ring (5) is provided at the upper end of the lifting shaft (3), and a connecting frame (6) is provided at the lower end of the lifting shaft (3). The connecting frame (6) is connected to the rotating wheel (8) via bolts.

2. A large water turbine runner lifting tool according to claim 1, characterized in that: Lifting ears (102) are symmetrically arranged on the upper side of the balance beam (1).

3. A large water turbine runner lifting tool according to claim 1, characterized in that: The two ends of the balance beam (1) are respectively provided with connection mechanisms (7), the connection mechanisms (7) are used to connect with the suspension plate of the bridge crane (2), the balance beam (1) is provided with an interface (103) corresponding to the connection mechanism (7), the balance beam (1) is provided with ear plates (104) on both sides corresponding to the interface (103), the suspension plate of the bridge crane (2) is arranged in the interface (103), the connection mechanism (7) comprises a screw rod bracket (701) arranged on one side of one group of ear plates (104), the screw rod (702) cooperates with a nut on the screw rod bracket (701), the suspension shaft (703) is connected with the screw rod (702), the suspension shaft (703) is inserted into the suspension holes of the ear plates (104) and the suspension plate of the bridge crane (2) at the same time, and a hand wheel (704) is provided at one end of the screw rod (702).

4. A large water turbine runner lifting tool according to claim 3, characterized in that: The balance beam (1) is in the shape of an I-shaped character, and four sets of connection mechanisms (7) are arranged at both ends of the balance beam (1).

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