A tool for turning over the lower inner end cover of a steam turbine generator

Abstract

The present invention discloses a tool for flipping the lower inner end cover of a steam turbine generator, comprising a rotating mechanism, a rotating mechanism gear, and a stopping mechanism; the rotating mechanism, rotating mechanism gear, and stopping mechanism are sequentially sleeved on the generator shaft, and the rotating mechanism, rotating mechanism gear, and stopping mechanism are sequentially connected; the stopping mechanism is connected to the generator housing at one end away from the rotating mechanism gear, and a driving mechanism is provided on the stopping mechanism, the output end of the driving mechanism being connected to the input end of the rotating mechanism gear. The device disclosed in the present invention is put into use when removing and reinstalling the lower inner end cover of the generator, saving time and effort. The rotating mechanism provides a support point for the lower inner end cover of the generator, not only realizing the rotation of the lower inner end cover along a fixed track, but also ensuring stability during the flipping process, and also preventing the lower inner end cover from falling off and damaging the equipment, thereby reducing operation risks and shortening operation time.

Description

Technical Field

[0001] The invention belongs to the field of steam turbine generators and relates to a tool for turning over a lower inner end cover of a steam turbine generator. Background Art

[0002] When dismantling and overhauling the generator, it is necessary to remove the lower inner end cover of the generator (hereinafter referred to as the lower inner end cover). Due to the structure of the generator, after the bolts of the lower inner end cover are removed, there is no support point. Three hoists are needed to cooperate with each other to lift and pull. First, flip the lower inner end cover upwards about 30-40 degrees and then drop it. Change the lifting angle and then flip it. Use multiple hoists to cooperate with traction to flip the inner end cover. After adjusting the hoist hanging position and the inner end cover lifting point for no less than 5 times, the lower inner end cover of the generator can be flipped 180 degrees to the upper end and then moved out using a crane. The entire flipping process requires 4 operators, and the operation is difficult. The operation time and difficulty are greatly affected by the directing operator. The normal operation time is at least 2-3 hours. If the operation is improper, the cold water manifold and its hand-wrapped insulation will be damaged.

[0003] Secondly, if the lower inner end cover has no support point during the flipping process, the original technology uses three hoists to cooperate with each other to lift and pull, which makes it impossible for the lower inner end cover to flip according to the fixed track. There is a risk of slipping, rebounding, and dislocation during the lifting and pulling of the lower inner end cover. If the rotation is not stuck in time, personnel need to enter the gap between the inner and outer end covers to check and support the lower inner end cover. If unhooking occurs, personal injury may occur. The same is true for reinstalling the lower inner end cover. The stability of the lower inner end cover during flipping is poor. Summary of the Invention

[0004] The purpose of the present invention is to solve the problems in the prior art that the lower inner end cover of the generator is flipped over in a long operation time, with many operating steps, a high risk level, and poor stability of the lower inner end cover during the flipping process, and to provide a tool for flipping the lower inner end cover of a steam turbine generator.

[0005] In order to achieve the above object, the present invention adopts the following technical solutions:

[0006] A tool for turning over a lower inner end cover of a steam turbine generator, comprising a rotating mechanism, a rotating mechanism gear and a stopping mechanism;

[0007] The rotating mechanism, the rotating mechanism gear and the stopping mechanism are sequentially sleeved on the generator shaft, and the rotating mechanism, the rotating mechanism gear and the stopping mechanism are sequentially connected;

[0008] One end of the stopping mechanism away from the rotating mechanism gear is connected to the generator housing. A driving mechanism is provided on the stopping mechanism, and an output end of the driving mechanism is connected to an input end of the rotating mechanism gear.

[0009] A further improvement of the present invention is:

[0010] The rotating mechanism includes an upper clamp assembly and a lower clamp assembly, which are arranged opposite to each other along the generator shaft, and the upper clamp assembly is connected to the horizontal end surface of the lower inner end cover of the generator.

[0011] The upper hoop assembly includes a rotating mechanism support wing and a rotating upper hoop, and the lower hoop assembly includes a rotating lower hoop;

[0012] The rotating upper hoop and the rotating lower hoop are arranged opposite to each other along the generator shaft. The rotating mechanism support wings are respectively arranged on both sides of the rotating upper hoop with the generator shaft as the center. The rotating mechanism support wings are connected to the horizontal end surface close to the lower inner end cover of the generator.

[0013] The rotating upper hoop and the rotating lower hoop are rigidly connected.

[0014] Protective gaskets are provided on the inner side walls of the rotating upper clamp and the rotating lower clamp.

[0015] The stopping mechanism comprises a stopping upper hoop, a stopping lower hoop and a stopping plate;

[0016] The upper stop hoop and the lower stop hoop are arranged opposite to each other along the generator shaft;

[0017] One end of the stop plate is connected to the stop upper clamp, and the other end is connected to any position on the engine casing.

[0018] The driving mechanism is arranged on the upper end of the stopping upper clamp.

[0019] The upper stop hoop is rigidly connected to the lower stop hoop.

[0020] Corresponding screw holes are provided on the end surfaces where the upper stop hoop and the lower stop hoop are connected.

[0021] The driving mechanism includes a driving motor, a speed reducer and a driving gear;

[0022] The speed reducer and the driving motor are sequentially arranged at the upper end of the stopping mechanism, the output end of the driving motor is connected to the driving gear, and the driving gear is meshed with the rotating mechanism gear.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] The present invention discloses a tool for turning over the lower inner end cover of a steam turbine generator. A rotating mechanism, a rotating mechanism gear and a stopping mechanism which are connected in sequence are sleeved on a rotating shaft of the generator. The rotating mechanism is connected to the lower inner end cover of the generator through an upper clamping hoop assembly and a lower clamping hoop assembly. The rotating mechanism is connected to the rotating mechanism gear. The rotating mechanism gear is powered by a driving mechanism on the stopping mechanism, thereby driving the rotating mechanism to rotate, thereby realizing a 180-degree turning over of the lower inner end cover of the generator. During the rotation process, the rotating shaft of the generator is used as a support point, thereby preventing the lower inner end cover of the generator from slipping and dislocating. The power provided by the driving assembly drives the lower inner end cover of the generator to rotate, thereby improving The work efficiency is improved, and the problem of too many operators is overcome. After the lower inner end cover is flipped over, the upper clamp assembly is removed and the lower inner end cover of the generator can be lifted out. The operation is simple and quick. The stopping mechanism is connected to the outer casing of the generator to prevent the stopping mechanism from rotating with the generator shaft, and further better fix the driving mechanism. The device disclosed in the present invention saves time and effort when removing and reinstalling the lower inner end cover of the generator. The rotating mechanism provides a support point for the lower inner end cover of the generator, which not only realizes the rotation of the lower inner end cover along the fixed track, but also ensures the stability during the flipping process, and also avoids the falling off of the lower inner end cover and damaging the equipment, thereby reducing the operation risk and shortening the operation time.

[0025] Furthermore, the present invention connects the rotating mechanism support wing with the lower inner end cover of the generator, thereby improving the stability of the connection between the rotating mechanism and the lower inner end cover of the generator.

[0026] Furthermore, in the present invention, protective gaskets are provided on the inner side walls of the upper rotating hoop and the lower rotating hoop, which improves the flexibility of the rotating mechanism along the generator shaft while also protecting the shaft.

[0027] Furthermore, the upper stop hoop and the lower stop hoop in the stop mechanism of the present invention are relatively fixed on the generator shaft to prevent the rotating mechanism and the stop mechanism from being displaced, resulting in the driving gear and the rotating mechanism gear being unable to engage. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0029] Figure 1 It is a front structural diagram of the present invention;

[0030] Figure 2 It is a side structural diagram of the present invention;

[0031] Figure 3 It is a top view of the structure of the present invention;

[0032] Figure 4 is a cross-sectional view of the present invention;

[0033] Figure 5 This is a structural diagram of the generator lower inner end cover before rotation in one embodiment of the present invention;

[0034] Figure 6 For the present invention Figure 5 A structural diagram of the generator after the lower inner end cover is turned over in the embodiment;

[0035] Figure 7 This is a structural diagram of the generator lower inner end cover before rotation in another embodiment of the present invention;

[0036] Figure 8 For the present invention Figure 7 Structural diagram of the generator lower inner end cover after flipping over in the embodiment.

[0037] Wherein: 1- driving mechanism; 101- driving motor; 102- speed reducer; 103- driving gear;

[0038] 201-first lifting ring; 202-second lifting ring; 203-third lifting ring; 204-fourth lifting ring;

[0039] 3-rotating mechanism; 301-rotating mechanism support wing; 302-rotating upper clamp; 303-rotating lower clamp;

[0040] 4-Protective gasket;

[0041] 5-stop mechanism; 501-stop upper clamp; 502-stop lower clamp; 503-stop plate; 504-stop bolt;

[0042] 6-Fixing bolt; 7-Gear guard; 8-Support wing screw hole; 9-Rotating mechanism gear; 10-Generator stator; 11-Generator shaft; 12-Generator lower inner end cover; 13-First electric hoist; 14-First electric hoist chain; 15-Second electric hoist; 16-Second electric hoist chain; 17-Generator base. DETAILED DESCRIPTION

[0043] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0044] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort shall fall within the scope of protection of the present invention.

[0045] It should be noted that similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0046] In the description of the embodiments of the present invention, it should be noted that if the terms "upper," "lower," "horizontal," "inner," etc. appear, the orientation or positional relationship indicated is based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship in which the inventive product is typically placed when in use. These terms are merely for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first," "second," etc. are used only to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0047] In addition, if the term "horizontal" appears, it does not mean that the component must be absolutely horizontal, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0048] In the description of the embodiments of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "disposed," "installed," "connected," and "connected" should be understood in a broad sense. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to internal connections between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on specific circumstances.

[0049] The present invention is described in further detail below with reference to the accompanying drawings:

[0050] See also Figure 1 The embodiment of the present invention discloses a tool for turning over the lower inner end cover of a steam turbine generator, comprising a driving mechanism 1; a driving motor 101; a reducer 102; a driving gear 103; a first lifting ring 201; a second lifting ring 202; a third lifting ring 203; and a fourth lifting ring 204.

[0051] 3-rotating mechanism; 301-rotating mechanism support wing; 302-rotating upper clamp; 303-rotating lower clamp;

[0052] 4-Protective gasket;

[0053] 5-stop mechanism; 501-stop upper clamp; 502-stop lower clamp; 503-stop plate;

[0054] 6-Fixing bolt; 7-Gear guard; 8-Support wing screw hole; 9-Rotating mechanism gear; 10-Generator stator; 11-Generator shaft; 12-Generator lower inner end cover; 13-First electric hoist; 14-First electric hoist chain; 15-Second electric hoist; 16-Second electric hoist chain; 17-Generator base.

[0055] See also Figures 1 to 4 In the embodiment of the present invention, the rotating mechanism 3, the rotating mechanism gear 9 and the stopping mechanism 5 are connected in sequence and are sequentially sleeved on the generator shaft 11. The rotating mechanism 3 is used to fix the lower inner end cover 12 of the generator and drive the lower inner end cover 12 of the generator to rotate along the generator shaft 11. The rotating mechanism gear 9 is arranged between the rotating mechanism 3 and the stopping mechanism 5. The rotating mechanism gear 9 is rigidly connected to the rotating mechanism 3. The stopping mechanism 5 is used to fix the driving mechanism 1. The output end of the driving mechanism 1 is connected to the rotating mechanism gear 9. The rotating mechanism gear 9 drives the rotating mechanism 3 to rotate. The end of the stopping mechanism 5 away from the rotating mechanism gear 9 is connected to the generator housing to prevent the stopping mechanism 5 from rotating along the generator shaft 11.

[0056] Among them, the rotating mechanism 3 includes an upper clamp assembly and a lower clamp assembly, and the upper clamp assembly and the lower clamp assembly are arranged relatively along the generator shaft 11, the upper clamp assembly includes a rotating mechanism support wing 301 and a rotating upper clamp 302, and the lower clamp assembly includes a rotating lower clamp 303; the rotating upper clamp 302 and the rotating lower clamp 303 are symmetrically arranged on both sides of the generator shaft 11, and the rotating upper clamp 302 and the rotating lower clamp 303 constitute an annular structure with the same structure as the generator shaft 11, and corresponding connecting plates are provided on both sides of the rotating upper clamp 302 and the rotating lower clamp 303, and connecting holes are opened on the connecting plates. The fixing bolts 6 pass through the connecting holes to fix the rotating upper clamp 302 and the rotating lower clamp 303.

[0057] The rotating mechanism support wings 301 are arranged horizontally along the connecting plates on both sides of the rotating upper clamp 302, and the rotating mechanism support wings 301 on both sides are symmetrically arranged. The rotating mechanism support wings 301 are connected to the horizontal end surface of the lower inner end cover 12 of the generator. Support wing screw holes 8 are opened on the rotating mechanism support wings 301, and the support wing screw holes 8 are arranged corresponding to the connecting holes on the horizontal end surface of the lower inner end cover 12 of the generator. The rotating mechanism support wings 301 are fixed together with the lower inner end cover 12 of the generator through connecting parts.

[0058] Furthermore, in the embodiment of the present invention, the connecting end surfaces of the rotating mechanism gear 9 and the rotating upper clamp 302 and the rotating lower clamp 303 are fixed by bolt connection. The specific connection structure is as follows:

[0059] In an embodiment of the present invention, the rotating mechanism gear 9 includes two half gears, which are symmetrically arranged on the generator shaft 11 in an upper and lower manner. The half gear located at the upper end is connected to the connecting end face of the rotating upper clamp 302 by bolts, and the half gear located at the lower end is connected to the connecting end face of the rotating lower clamp 303 by bolts. The two half gears are fixedly connected with the rotating upper clamp 302 and the rotating lower clamp 303 to form an integral rotating mechanism gear 9.

[0060] Furthermore, in the embodiment of the present invention, a protective gasket 4 is provided on the inner side wall of the upper rotating clamp 302 and the lower rotating clamp 303, and the protective gasket 4 is a polytetrafluoroethylene gasket.

[0061] Furthermore, in the embodiment of the present invention, the stopping mechanism 5 includes a stopping upper clamp 501, a stopping lower clamp 502 and a stopping plate 503; wherein the stopping upper clamp 501 has the same structure as the rotating upper clamp 302, and the stopping lower clamp 502 has the same structure as the rotating lower clamp 303, and connecting plates are provided on both sides of the stopping upper clamp 501 and the stopping lower clamp 502, and stopping bolts 504 are installed on the connecting plates, and the stopping upper clamp 501 and the stopping lower clamp 502 are fixedly connected by the stopping bolts 504, and a stopping plate 503 is provided on the end face of the stopping upper clamp 501 away from the rotating mechanism gear 9, and one end of the stopping plate 503 is connected to the stopping upper clamp 501, and the other end is fixedly connected to any position of the generator casing, so as to avoid displacement of the stopping mechanism 5, resulting in the rotating mechanism gear 9 and the driving gear 103 being unable to engage. As the generator shaft 11 rotates, the stability of the drive mechanism 1 is guaranteed.

[0062] In an embodiment of the present invention, the stop plate 503 can be connected to any position of the generator casing as needed. During operation, the stop plate 503 can also be connected to the lower end cover of the generator. During disassembly or installation, any position on the generator that can serve as a supporting and fixing point can be connected to the stop plate 503.

[0063] Furthermore, the driving mechanism 1 in the embodiment of the present invention is arranged on the stopping upper clamp 501, and the specific structure is that the driving mechanism 1 includes a driving motor 101, a reducer 102 and a driving gear 103, wherein the reducer 102 is connected to the upper end face of the stopping upper clamp 501, the driving motor 101 is connected to the reducer 102, the output end of the driving motor 101 is connected to the driving gear 103, the driving gear 103 is located at the upper end of the rotating mechanism gear 9, and the rotating mechanism gear 9 is engaged with the driving gear 103.

[0064] See also Figures 2 to 3Furthermore, the embodiment of the present invention is also provided with a gear protection cover 7, which is a U-shaped structure. The gear protection cover 7 is symmetrically arranged along the vertical direction of the generator shaft. The gear protection cover 7 at the upper end is sleeved above the rotating upper clamp 302 and the driving gear 103, and the gear protection cover 7 at the lower end is sleeved on the outer side of the rotating lower clamp 303 and the rotating mechanism gear 9. The two gear protection covers 7 cooperate to sleeve the rotating upper clamp 302, the rotating lower clamp 303, the driving gear 103 and the rotating mechanism gear 9 between the two gear protection covers 7, and play a certain protective role for the rotating upper clamp 302, the rotating lower clamp 303, the driving gear 103 and the rotating mechanism gear 9 during the rotation process, wherein the lower end of the gear protection cover 7 at the upper end is connected to the horizontal end face of the upper end of the rotating upper clamp 302, and the upper end face of the gear protection cover 7 at the lower end is connected to the horizontal end face of the lower end of the rotating lower clamp 303. There is a gap between the inner side walls of the two gear protection covers 7 and the rotating upper hoop 302, the rotating lower hoop 303, the driving gear 103 and the rotating mechanism gear 9. There is also a gap between the two gear protection covers 7 and the stopping mechanism 5.

[0065] The working process of the embodiment of the present invention is as follows:

[0066] See also Figures 7 and 8 When the generator is dismantled for inspection and maintenance and the lower inner end cover 12 of the generator needs to be removed, after confirming that the upper inner end cover and other accessories have been removed, the rotating mechanism 3 is first installed on the generator shaft 11. First, assemble the rotating upper clamp 302 and the rotating lower clamp 303 with the fixing bolts 6 to install the rotating mechanism 3 on the generator shaft 11. Before installation, lubricating oil should be applied to the generator shaft and gasket 4 to ensure that the rotating mechanism 3 can rotate easily when installed on the shaft. The installation position of the rotating mechanism 3 is such that it can only be displaced axially toward the stop mechanism 5. Continue to align the rotating mechanism support wing 301 with the horizontal surface of the lower inner end cover 12 of the generator, and bolt the support wing screw hole 8 (fixing the lower inner end cover) to the horizontal surface screw barrel of the lower inner end cover 12 of the generator to fix them as one. At this time, the installation of the rotating part is completed.

[0067] Screw holes are provided on the end faces of the rotating mechanism gear 9 and the rotating mechanism 3 , and the rotating mechanism gear 9 and the rotating mechanism 3 are fixedly connected by bolts.

[0068] Continue to install the stopping mechanism 5, use the stopping bolt 504 to fix the stopping upper clamp 501 and the stopping lower clamp 502, and assemble them on the generator shaft 11. Protect the shaft before installation to ensure that the stopping mechanism 5 can be reliably fixed, then install the stopping plate 503, and connect the stopping plate 503 to any position of the generator casing to prevent displacement between the stopping mechanism 5 and the rotating mechanism 3, which will cause the rotating mechanism gear 9 and the driving gear 103 to be unable to engage. The driving mechanism 1 is installed on the upper end of the rotating upper clamp 501 to ensure that the driving gear 103 and the rotating mechanism gear 9 are in place. Finally, install the gear protection cover 7 and the installation is complete.

[0069] Furthermore, the bolts connecting the generator lower inner end cover 12 and the generator stator 10 are removed, and the power supply of the drive motor 101 is turned on. The drive motor 101 drives the drive gear 103 to rotate, and further drives the rotating mechanism gear 9 to rotate. Under the action of the rotating mechanism gear 9, the rotating mechanism 3 causes the generator lower inner end cover 12 to flip 180°.

[0070] See also Figure 5 After flipping into place, use a crane to lift the generator lower inner end cover 12 and remove the rotating mechanism upper clamp 302 and the stop upper clamp 501, then lift the generator lower inner end cover 12 out, you can complete the generator lower inner end cover flip and removal work conveniently, quickly and safely.

[0071] See also Figures 5 and 6 The present invention also discloses an embodiment in which a first lifting ring 201 and a second lifting ring 202 are symmetrically arranged on the rotating mechanism support wings 301 on both sides of the rotating mechanism 3, and a third lifting ring 203 and a fourth lifting ring 204 are arranged on the inner side wall of the generator electronic housing. The third lifting ring 203 is correspondingly arranged above the first lifting ring 201, and the fourth lifting ring 204 is correspondingly arranged above the second lifting ring 202.

[0072] The working principle of the embodiment of the present invention is as follows:

[0073] The first lifting ring 201 and the fourth lifting ring 204 are connected through the first electric hoist 13 and the first electric hoist chain 14, and the second lifting ring 202 and the third lifting ring 203 are connected through the second electric hoist 15 and the second electric hoist chain 16. During operation, the first electric hoist 13 is connected to the fourth lifting ring 204, one end of the first electric hoist chain 14 is connected to the first lifting ring 201, and the other end is connected to the first electric hoist 13 after passing through the lower end surface of the rotating lower hoist 303, the second electric hoist 15 is connected to the third lifting ring 203, one end of the second electric hoist chain 16 is connected to the second lifting ring 202, and the other end is connected to the second electric hoist 15. Through the two electric hoists, the two electric hoist chains pull the rotating mechanism 3 to rotate along the generator shaft 11, thereby realizing a 180° flip of the lower inner end cover 12 of the generator.

[0074] The device disclosed in the embodiment of the present invention can fix the lower inner end cover and turn it over according to a fixed trajectory with the main shaft as the support point, eliminating the phenomenon that the fixed cold water manifold and its hand-wrapped insulation will be damaged due to collision when lifting and turning the lower inner end cover of the generator. At the same time, it avoids the phenomenon that operators enter the gap between the inner and outer end covers for inspection, thereby reducing the operational risks when removing and installing the lower inner end cover of the generator.

[0075] The generator's lower inner end cover rotates with the main shaft as the support point. Only a one-time drive motor is required to drive the lower inner end cover through the rotating mechanism. Using this tool can improve work efficiency, ensure smooth work, and reduce operation time from at least 2-3 hours to 0.5 hours.

[0076] In the embodiment disclosed in the present invention, the rotating mechanism and the electric hoist are coordinated for flipping, the number of electric hoists is reduced from 4 to 2, the operation steps are reduced from no less than 5 times to 1 time for adjusting the hanging back and forth in different positions, and the number of operators is reduced from 4 to 2.

[0077] When the lower inner end cover is reinstalled, the device disclosed in the embodiment of the present invention can also be used.

[0078] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A tool for turning over the lower inner end cover of a steam turbine generator, characterized in that: It includes a rotating mechanism (3), a rotating mechanism gear (9) and a stopping mechanism (5); The rotating mechanism (3), the rotating mechanism gear (9) and the stopping mechanism (5) are sequentially sleeved on the generator shaft, and the rotating mechanism (3), the rotating mechanism gear (9) and the stopping mechanism (5) are sequentially connected; One end of the stop mechanism (5) away from the rotating mechanism gear (9) is connected to the generator housing, and a driving mechanism (1) is provided on the stop mechanism (5), and the output end of the driving mechanism (1) is connected to the input end of the rotating mechanism gear (9); The rotating mechanism (3) comprises an upper hoop assembly and a lower hoop assembly, the upper hoop assembly and the lower hoop assembly being arranged opposite to each other along the generator shaft, and the upper hoop assembly being connected to the horizontal end surface of the lower inner end cover of the generator; The upper hoop assembly comprises a rotating mechanism support wing (301) and a rotating upper hoop (302), and the lower hoop assembly comprises a rotating lower hoop (303); The rotating upper hoop (302) and the rotating lower hoop (303) are arranged opposite to each other along the generator shaft; the rotating mechanism support wings (301) are respectively arranged on both sides of the rotating upper hoop (302) with the generator shaft as the center; the rotating mechanism support wings (301) are connected to the horizontal end surface close to the lower inner end cover of the generator; the stopping mechanism (5) comprises a stopping upper hoop (501), a stopping lower hoop (502) and a stopping plate (503); The upper stop hoop (501) and the lower stop hoop (502) are arranged opposite to each other along the generator shaft; One end of the stop plate (503) is connected to the stop upper clamp (501), and the other end is connected to any position on the engine casing.

2. A steam turbine generator lower inner end cover turning tool according to claim 1, characterized in that: The rotating upper hoop (302) and the rotating lower hoop (303) are rigidly connected.

3. The tool for turning over the lower inner end cover of a steam turbine generator according to claim 1, characterized in that: Protective gaskets (4) are provided on the inner side walls of the rotating upper hoop (302) and the rotating lower hoop (303).

4. A steam turbine generator lower inner end cover turning tool according to claim 1, characterized in that: The driving mechanism (1) is arranged at the upper end of the stop upper clamp (501).

5. The tool for turning over the lower inner end cover of a steam turbine generator according to claim 1, characterized in that: The upper stop hoop (501) is rigidly connected to the lower stop hoop (502).

6. A steam turbine generator lower inner end cover turning tool according to claim 5, characterized in that: Corresponding screw holes are provided on the end surfaces where the upper stop hoop (501) and the lower stop hoop (502) are connected.

7. The tool for turning over the lower inner end cover of a steam turbine generator according to claim 1, characterized in that: The driving mechanism (1) comprises a driving motor (101), a speed reducer (102) and a driving gear (103); The speed reducer (102) and the driving motor (101) are sequentially arranged at the upper end of the stop mechanism (5), the output end of the driving motor (101) is connected to the driving gear (103), and the driving gear (103) is meshed with the rotating mechanism gear (9).

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