Automatic following ejection device for stator bar of water-turbine generator set

Abstract

A wedge-shaped gap exists between the top of an upper-layer coil bar and the top of a lower-layer coil bar, a wedge-shaped ejector is placed in the wedge-shaped gap, an ejection oil cylinder is arranged in the wedge-shaped ejector, and the wedge-shaped ejector is in an L shape and is provided with a vertical guide rail. And the guide rail is connected with the wedge-shaped device in a sliding manner and can be driven to move downwards by an ejector moving-down motor. An ejection oil cylinder of the wedge-shaped ejector is used for carrying out ejection operation on an upper-layer winding bar, a back-pressure device is arranged outside the upper-layer winding bar so that ejection operation can be assisted through ejection and back-pressure alternate operation, installation operation of the winding bar can also be carried out through back-pressure, and ejection and back-pressure actions are controlled through an electric hydraulic pump. The wedge-shaped interval is enlarged through ejection operation, the wedge-shaped ejector can be driven by an ejector downward moving motor to descend to enable the ejection face to move downwards till complete ejection is achieved, the ejection operation of the device can be automatically controlled through a control device, the labor intensity of manual prying in the past is greatly reduced, and damage to a winding bar is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of water turbine generator maintenance, in particular to an automatic following water turbine generator set stator wire rod ejecting device. Background Art

[0002] During the maintenance and overhaul of hydro-turbine generator sets, the disassembly of stator wire bars is extremely important. As an important part of hydro-turbine generators, the efficiency and safety of their disassembly directly affect the maintenance cycle and operation safety of the entire generator set. However, the existing stator wire bar disassembly technology still has many difficulties and defects in actual operation.

[0003] First, in the prior art, the disassembly of stator bars often relies on manual operation, which not only increases the labor intensity of operators, but also makes it difficult to ensure the accuracy and consistency of the disassembly process. For example, when using traditional hand tools or simple mechanical equipment for disassembly, operators need to manually adjust the angle and strength of the tools according to the structural characteristics of the bars. This operation method is not only inefficient, but also easily causes damage to the bars and surrounding structures.

[0004] Secondly, the existing stator bar disassembly devices are insufficient in portability and efficiency. Although some disassembly devices can achieve a certain degree of automation, they are difficult to adapt to small working spaces and complex working environments due to their large size and complex structure. At the same time, these devices often consume a lot of energy and time during the disassembly process, resulting in low overall disassembly efficiency.

[0005] In addition, the existing stator bar disassembly technology lacks effective control over the safety risks that may arise during the disassembly process. During the disassembly process, due to the close connection between the bar and the surrounding structure, there may be safety hazards such as loosening and falling off. If the disassembly device cannot effectively identify and respond to these risks, it will pose a threat to the safety of the operator.

[0006] There are also tools for disassembling wire rods in the prior art. For example, Chinese patent document CN219554774U records an efficient and portable device for disassembling stator wire rods of a hydro-turbine generator, which includes: a soft base, one side of which is a support surface for contacting the side of the stator core; a steel pipe, the upper part of which is a hand-held part, and a lifting lug is fixed on the lower side, and the lower end of the steel pipe can be rotatably connected to the soft base via a rotating shaft; a soft sling connected to the lifting lug, which is used to be sleeved on the stator wire rod when disassembling the stator wire rod. This disassembly method relies on a sling, and its disassembly accuracy and convenience are obviously insufficient. Summary of the invention

[0007] The technical problem to be solved by the utility model is to provide an automatic following stator wire rod ejecting device for a hydro-turbine generator set, which improves the disassembly efficiency and safety of the stator wire rods, can realize fast, accurate and safe disassembly of the stator wire rods and realize automatic following downward movement.

[0008] In order to solve the above technical problems, the technical solution adopted by the utility model is:

[0009] The stator wire rod ejection device of the hydro-turbine generator set automatically follows. The stator wire rod includes an upper wire rod and a lower wire rod. There is a wedge-shaped gap between the tops of the upper wire rod and the lower wire rod. A wedge-shaped ejector is placed in the wedge-shaped gap. An ejector oil cylinder is arranged in the wedge-shaped ejector. The wedge-shaped ejector uses the lower wire rod as a force basis and pushes the upper wire rod away from the lower wire rod through the action of the ejector oil cylinder to enlarge the wedge-shaped gap. The enlargement of the wedge-shaped gap causes the wedge-shaped ejector to move downward due to its own weight. The ejector oil cylinder continues to work so that the upper wire rod is completely separated from the lower wire rod;

[0010] The wedge-shaped ejector is L-shaped and has a vertical guide rail, which is slidably connected to the wedge-shaped device and can be driven to move downward by the ejector downward movement motor.

[0011] A back pressure device is provided at the front end of the upper wire rod, and a back pressure oil cylinder is provided on the back pressure device, and a back pressure operation is performed on the upper wire rod through the back pressure oil cylinder.

[0012] The above-mentioned back pressure device is installed on a slide bar, the slide bar is placed vertically, and both ends of the slide bar are fixed. The back pressure device can slide along the slide bar and be fixed.

[0013] The ejection oil cylinder and the back pressure oil cylinder are connected to the electric hydraulic pump through hydraulic pipelines.

[0014] The electric hydraulic pump is provided with a valve body, and the ejection oil cylinder and the back pressure oil cylinder are connected to the valve body port through a hydraulic pipeline. The valve body makes it possible for one of the ejection oil cylinder and the back pressure oil cylinder to be in a unloading state when the other one is in a working state.

[0015] The above-mentioned wedge-shaped ejector includes a base plate in contact with the lower layer of wire rods, the base plate is L-shaped and has a guide rail extending vertically downward, the guide rail is slidably connected to both ends of the slide plate, the lower end of the slide plate is rotatably connected to the ejection plate body, an ejection cylinder is arranged between the ejection plate body and the upper end of the base plate, the telescopic end of the ejection cylinder is connected to the ejection plate body, and the ejection plate body is in contact with the back of the upper layer of wire rods.

[0016] The top of the base plate is provided with an ejector downward moving motor, the slide plate is provided with a nut seat on one side of the guide rail, the lead screw passes through the nut seat and engages with it, and the lead screw is driven by the ejector downward moving motor.

[0017] The piston end of the above-mentioned back-pressure oil cylinder is connected with a back-pressure rod, and the end of the back-pressure rod is rotatably connected to a contact plate. The contact plate is made of a flexible material and its hardness is less than that of the wire rod.

[0018] An interlayer pad is arranged between the upper wire rod and the lower wire rod, and a flexible protective layer is arranged at the bottom of the wedge-shaped ejector.

[0019] The slide bar is a lead screw and meshes with the bottom of the back pressure device. Fixed seats are arranged at both ends of the slide bar, and a back pressure driving motor is arranged on the fixed seat to drive the lead screw.

[0020] The utility model provides an automatic following stator wire rod ejecting device for a hydro-turbine generator set. A wedge-shaped ejector is placed between an upper wire rod and a lower wire rod, and an ejection oil cylinder of the wedge-shaped ejector is used to eject the upper wire rod. A back pressure device is arranged outside the upper wire rod to assist in the ejection operation through alternate operations of ejection and back pressure. The wire rod installation operation can also be performed through back pressure. The ejection and back pressure actions are controlled by an electric hydraulic pump. The wedge interval is enlarged through the ejection operation. The wedge-shaped ejector can be driven by a motor to automatically descend so that the ejection surface moves downward until it is completely ejected. The ejection operation of the device can be automatically controlled by a control device, which greatly reduces the labor intensity of manual prying and reduces damage to the wire rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The utility model is further described below in conjunction with the accompanying drawings and embodiments:

[0022] Figure 1 It is a structural schematic diagram of the wire rod ejection device of the utility model;

[0023] Figure 2 This is a schematic diagram of the structure of the wedge-shaped ejector of the utility model;

[0024] Figure 3 for Figure 2 A partial schematic diagram of the cutaway portion of AA in FIG.

[0025] Figure 4 is a structural schematic diagram of the base plate;

[0026] Figure 5 It is a structural schematic diagram of the back pressure device of the utility model.

[0027] In the figure: electric hydraulic pump 1, wedge-shaped ejector 2, base plate 201, ejector plate body 202, ejector cylinder 203, flexible protective layer 204, slide plate 205, guide rail 206, nut seat 207, lead screw 208, back pressure device 3, back pressure cylinder 301, back pressure rod 302, contact plate 303, slide rod 4, fixed seat 5, interlayer gasket 6, upper wire rod 7, lower wire rod 8, back pressure drive motor 9, ejector downward movement motor 10. DETAILED DESCRIPTION

[0028] like Figure 1-5As shown in the figure, the stator wire rod ejection device of the hydro-turbine generator set which follows automatically, the stator wire rod comprises an upper wire rod 7 and a lower wire rod 8, there is a wedge-shaped gap between the top of the upper wire rod 7 and the lower wire rod 8, a wedge-shaped ejector 2 is placed in the wedge-shaped gap, an ejection oil cylinder 203 is arranged in the wedge-shaped ejector 2, the lower wire rod 8 is used as a force basis and the upper wire rod 7 is pushed away from the lower wire rod 8 by the action of the ejection oil cylinder 203 to enlarge the wedge-shaped gap, the enlargement of the wedge-shaped gap causes the wedge-shaped ejector 2 to move downward due to its own weight, and the ejection oil cylinder 203 continues to work so that the upper wire rod 7 is completely separated from the lower wire rod 8;

[0029] The wedge-shaped ejector 2 is L-shaped and has a vertical guide rail 206, which is slidably connected to the wedge-shaped device and can be driven to move downward by the ejector downward motor 10.

[0030] like Figure 1 As shown in the figure, a wedge-shaped ejector 2 is placed between the upper wire rod 7 and the lower wire rod 8, and the ejection cylinder 203 in the wedge-shaped ejector 2 is extended, so that the gap between the upper wire rod 7 and the lower wire rod 8 is enlarged, and the wedge-shaped ejector 2 can go deeper downward between the two, and then continue to work to completely separate the two.

[0031] like Figure 2 As shown in the figure, the wedge-shaped ejector 2 is divided into a base plate part hung on the lower wire rod and a wedge-shaped part in sliding contact with the base plate, and the ejector downward movement motor 10 drives the wedge-shaped part to move downward, so that the ejection process can be automatically lowered.

[0032] A back pressure device 3 is provided at the front end of the upper wire rod 7 . A back pressure oil cylinder 301 is provided on the back pressure device 3 . The back pressure oil cylinder 301 is used to perform back pressure operation on the upper wire rod 7 .

[0033] The back pressure device 3 can be used to press the wire rod back into the core slot. In addition, when the wedge-shaped ejector 2 is not easy to eject the upper wire rod 7, the upper wire rod 7 can be more easily ejected through the cooperation of the back pressure device 3 and the wedge-shaped ejector 2.

[0034] The above-mentioned back pressure device 3 is installed on the slide bar 4, the slide bar 4 is placed vertically, and both ends of the slide bar 4 are fixed. The back pressure device 3 can slide along the slide bar 4 and be fixed.

[0035] A sliding connection can be adopted between the back pressure device 3 and the slide rod 4. The slide rod 4 passes through the end of the back pressure device 3. The back pressure device 3 is provided with a locking component. Magnetic fixing seats can be used at both ends of the slide rod 4 to adsorb the slide rod on the surface of the stator core. The slide rod 4 can also adopt a screw structure. A nut is provided at the bottom of the back pressure device 3 to engage with the screw. The screw is driven by a motor to make the back pressure device 3 move up and down along the slide rod 4.

[0036] The ejection cylinder 203 and the back-pressure cylinder 301 are connected to the electric hydraulic pump 1 through hydraulic pipelines.

[0037] The electric hydraulic pump 1 is provided with a valve body, and the ejection cylinder 203 and the back pressure cylinder 301 are connected to the valve body port through a hydraulic pipeline. The valve body makes it possible for one of the ejection cylinder 203 and the back pressure cylinder 301 to be in a unloading state when the other one is in a working state.

[0038] The above-mentioned wedge-shaped ejector 2 includes a base plate 201 in contact with the lower wire rod 8. The base plate 201 is L-shaped and has a guide rail 206 extending vertically downward. The guide rail 206 is slidably connected to both ends of the slide plate 205. The lower end of the slide plate 205 is rotatably connected to the ejector plate body 202. An ejector cylinder 203 is arranged between the ejector plate body 202 and the upper end of the base plate 201. The telescopic end of the ejector cylinder 203 is connected to the ejector plate body 202, and the ejector plate body 202 is in contact with the back of the upper wire rod 7.

[0039] The triangular structure formed by the slide plate 205, the ejection plate body 202 and the ejection oil cylinder 203 makes the base plate 201 and the ejection plate body 202 form a wedge shape, and the upper wire rod 7 and the lower wire rod 8 are separated by the extension and contraction of the ejection oil cylinder 203.

[0040] After the upper wire rod is ejected, the ejector downward movement motor 10 is used to automatically drive the wedge-shaped part to move downward, so that the automatic ejection operation can be realized.

[0041] The top of the base plate 201 is provided with an ejector downward movement motor 10, and the slide plate 205 is provided with a nut seat 207 on one side of the guide rail 206. The lead screw 208 penetrates the nut seat 207 and engages with it. The lead screw 208 is driven by the ejector downward movement motor 10.

[0042] The piston end of the above-mentioned back-pressure oil cylinder 301 is connected with a back-pressure rod 302 , and the end of the back-pressure rod 302 is rotatably connected to a contact plate 303 . The contact plate 303 is made of a flexible material and its hardness is less than that of the wire rod.

[0043] An interlayer gasket 6 is provided between the upper layer wire rod 7 and the lower layer wire rod 8 , and a flexible protective layer 204 is provided at the bottom of the wedge-shaped ejector 2 .

[0044] The slide bar 4 is a lead screw and meshes with the bottom of the back pressure device 3. Both ends of the slide bar 4 are provided with fixed seats 5, and the fixed seats 5 are provided with a back pressure driving motor 9 to drive the lead screw.

[0045] Steps to use the device:

[0046] Step 1: Use a tool to pull up the end of the wire rod so that the wire rod protrudes from the iron core and a wedge-shaped gap is expanded between the upper wire rod 7 and the lower wire rod 8;

[0047] Step 2: Place the tip of the wedge-shaped ejector 2 downward into the wedge-shaped gap;

[0048] Step 3: Start the electric hydraulic pump 1 and use the oil pressure to slowly push out the upper end of the wire rod. As the wire rod is pushed out, the wedge-shaped gap becomes larger, and the ejector moves the motor 10 downward to drive the wedge-shaped part to fall.

[0049] Step 4: The driving motor 9 drives the back pressure device 3 to follow the wedge-shaped ejector 2 to adjust the working surface downward;

[0050] Step 5: Continue to control the electric hydraulic pump 1 to push out the middle part of the wire rod until the entire wire rod is pushed out.

Claims

1. The automatic following hydraulic turbine generator stator wire rod ejection device is characterized by: The stator wire rods include an upper wire rod (7) and a lower wire rod (8), a wedge-shaped gap is formed between the tops of the upper wire rod (7) and the lower wire rod (8), a wedge-shaped ejector (2) is placed in the wedge-shaped gap, an ejector oil cylinder (203) is arranged in the wedge-shaped ejector (2), the wedge-shaped ejector (2) uses the lower wire rod (8) as a force bearing base and pushes the upper wire rod (7) away from the lower wire rod (8) through the action of the ejector oil cylinder (203) to enlarge the wedge-shaped gap, the wedge-shaped ejector (2) moves downward due to its own weight due to the enlargement of the wedge-shaped gap, and the ejector oil cylinder (203) continues to work so that the upper wire rod (7) is completely separated from the lower wire rod (8); The wedge-shaped ejector (2) is L-shaped and has a vertical guide rail (206). The guide rail (206) is slidably connected to the wedge-shaped device and can be driven to move downward by the ejector downward movement motor (10).

2. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 1 is characterized in that: A back pressure device (3) is provided at the front end of the upper wire rod (7), and a back pressure oil cylinder (301) is provided on the back pressure device (3), and a back pressure operation is performed on the upper wire rod (7) through the back pressure oil cylinder (301).

3. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 2 is characterized in that: The back pressure device (3) is mounted on a slide bar (4). The slide bar (4) is placed vertically, and both ends of the slide bar (4) are fixed. The back pressure device (3) can slide along the slide bar (4) and be fixed.

4. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 3 is characterized in that: The ejection oil cylinder (203) and the return pressure oil cylinder (301) are connected to the electric hydraulic pump (1) via hydraulic pipelines.

5. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 4 is characterized in that: The electric hydraulic pump (1) is provided with a valve body, and the ejection oil cylinder (203) and the back-pressure oil cylinder (301) are connected to the valve body port via a hydraulic pipeline. The valve body enables one of the ejection oil cylinder (203) and the back-pressure oil cylinder (301) to be in a load-unloading state when the other one is in a working state.

6. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 4 is characterized in that: The wedge-shaped ejector (2) comprises a base plate (201) in contact with the lower wire rod (8); the base plate (201) is L-shaped and has a guide rail (206) extending vertically downward; the guide rail (206) is slidably connected to both ends of a slide plate (205); the lower end of the slide plate (205) is rotatably connected to an ejection plate body (202); an ejection oil cylinder (203) is arranged between the ejection plate body (202) and the upper end of the base plate (201); the telescopic end of the ejection oil cylinder (203) is connected to the ejection plate body (202); and the ejection plate body (202) is in contact with the back of the upper wire rod (7).

7. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 6 is characterized in that: The top of the base plate (201) is provided with an ejector downward movement motor (10), the slide plate (205) is provided with a nut seat (207) on one side of the guide rail (206), the lead screw (208) passes through the nut seat (207) and engages therewith, and the lead screw (208) is driven by the ejector downward movement motor (10).

8. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 7 is characterized in that: The piston end of the back-pressure oil cylinder (301) is connected to a back-pressure rod (302), and the end of the back-pressure rod (302) is rotatably connected to a contact plate (303). The contact plate (303) is made of a flexible material and has a hardness lower than that of the wire rod.

9. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 8 is characterized in that: An interlayer pad (6) is provided between the upper layer wire rod (7) and the lower layer wire rod (8), and a flexible protective layer (204) is provided at the bottom of the wedge-shaped ejector (2).

10. The automatic following hydraulic turbine generator stator wire rod ejection device according to claim 9, characterized in that: The slide bar (4) is a lead screw and meshes with the bottom of the back pressure device (3). Fixed seats (5) are provided at both ends of the slide bar (4). A back pressure drive motor (9) is provided on the fixed seat (5) to drive the lead screw.

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