A grinding tool for a generator medium pressure regulating gate

Abstract

The utility model belongs to the technical field of maintenance tool of medium pressure adjusting door, concretely relates to a kind of grinding tool of generator medium pressure adjusting door, including positioning part and grinding part, positioning part includes the positioning disc of coaxial heart setting, positioning adjusting disc, stroke cover, positioning disc is set in the outer wall of positioning adjusting disc, and positioning adjusting disc rotation is connected in the outer wall of stroke cover;Grinding part includes motor, speed reducer, rotating shaft, grinding disc;Motor is connected with speed reducer, rotating shaft, grinding disc coaxial heart setting;The transmission shaft of one end of rotating shaft is connected with speed reducer, and the other end is connected with the grinding disc of its end portion setting;And stroke cover is connected in rotating shaft outside portion.The utility model reaches the coarse adjustment of grinding.

Description

Technical Field

[0001] This utility model belongs to the technical field of maintenance tools for medium-pressure regulating gates, specifically relating to a grinding tool for a generator medium-pressure regulating gate. Background Technology

[0002] In generator systems, the intermediate pressure governor valve (IPGV) is an important component of the turbine speed control system. It is mainly used to regulate the steam intake of the intermediate pressure cylinder, thereby controlling the power and speed of the unit and ensuring stable generator operation.

[0003] However, during long-term operation, medium-pressure regulating valves are prone to internal leakage, meaning that steam still leaks even when the valve is closed.

[0004] The valve core and seat sealing surfaces of medium-pressure regulating valves need to achieve extremely high flatness and smoothness to form a tight steam seal. During long-term operation, the sealing surfaces of the valves are subjected to high-temperature steam erosion, wear from particulate impurities, or mechanical friction from frequent opening and closing, which will gradually cause surface damage and internal leakage.

[0005] Grinding can eliminate defects such as scratches, pits, oxide layers, and erosion grooves on the sealing surface through the micro-cutting action of abrasives, so that the two sealing surfaces fit tightly together and thus prevent steam leakage.

[0006] During the power generation process, when internal leakage occurs in the generator's medium-pressure regulating valve during maintenance, the lack of specialized tools makes it impossible to perform coarse and fine adjustments by grinding the valve. The valve must be handed over to the manufacturer for repair, but this approach suffers from long repair times and inconsistent quality.

[0007] In order to enable power generation companies to independently grind the medium-pressure regulating valve during the production process, this utility model proposes a new grinding tool for the medium-pressure regulating valve of a generator. Utility Model Content

[0008] The problem this invention aims to solve is: how to design a grinding tool that can grind a medium-pressure regulating gate, and how to change the position of the grinding disc to achieve coarse and fine adjustment of the medium-pressure regulating gate.

[0009] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0010] A grinding tool for a generator medium-pressure regulating valve includes a positioning part and a grinding part. The positioning part includes a positioning disk, a positioning adjusting disk, and a stroke sleeve arranged coaxially. The positioning disk is sleeved on the outer wall of the positioning adjusting disk, and the positioning adjusting disk is rotatably connected to the outer wall of the stroke sleeve.

[0011] The grinding section includes a motor, a reducer, a rotating shaft, and a grinding disc; the motor is connected to the reducer, and the rotating shaft and the grinding disc are coaxially arranged; one end of the rotating shaft is connected to the drive shaft of the reducer, and the other end is connected to the grinding disc at its end;

[0012] Furthermore, the travel sleeve is connected to the outside of the rotating shaft.

[0013] In this technical solution, based on the depth of the grinding surface of the generator medium-pressure regulating valve and the valve end cover, the positioning disc is rotated to drive the positioning adjustment disc to slide along the stroke sleeve, thereby changing the distance between the grinding disc and the positioning disc to achieve coarse grinding adjustment.

[0014] Furthermore, the grinding section also includes an adjusting shaft and a grinding adjusting disc; the rotating shaft is rotatably connected to the inner wall of the adjusting shaft, and the stroke sleeve is rotatably connected to the outer wall of the adjusting shaft;

[0015] The grinding adjustment disc is sleeved on the outer wall of the adjustment shaft. The inside of the stroke sleeve near the end of the grinding adjustment disc is provided with protruding teeth, and the grinding adjustment disc near the side of the stroke sleeve is also provided with matching protruding teeth.

[0016] The tail of the adjusting shaft is provided with an anti-rotation groove, and the tail of the stroke sleeve is provided with at least one anti-rotation screw hole. A bolt is provided in the anti-rotation screw hole and inserted into the anti-rotation groove.

[0017] In this technical solution, the grinding adjustment disc is pushed into the stroke sleeve, and the teeth on the grinding adjustment disc are interlocked with the teeth on the stroke sleeve; the handle of the grinding adjustment disc is rotated, which drives the stroke sleeve to rotate; and the bolt on the anti-rotation screw hole is inserted into the anti-rotation groove, thereby driving the adjustment shaft to adjust axially; finally, the grinding disc reaches the ideal grinding position, and the position of the grinding disc is finely adjusted. At this time, the grinding purpose is achieved by controlling the speed of the motor.

[0018] Furthermore, the grinding section also includes a positioning plate; the positioning plate is sleeved on the outer wall of the adjusting shaft, and the grinding adjusting plate is located between the positioning plate and the stroke sleeve; the positioning plate is provided with locking screws.

[0019] In this technical solution, the positioning disk is placed close to the grinding adjustment disk, and the locking screws on the positioning disk are tightened to ensure that the grinding adjustment disk does not undergo axial displacement, thus ensuring the stability of the grinding adjustment disk.

[0020] Furthermore, the reducer's bushing is connected to the reducer's drive shaft via an internally embedded rotating bearing.

[0021] Furthermore, rotating bearings are embedded at both ends of the adjusting shaft, the rotating shaft passes through the inside of the adjusting shaft, and a plug is provided on the outside of each rotating bearing, and a set screw is provided on the adjusting shaft.

[0022] Furthermore, the rotating shaft is connected to the drive shaft of the reducer via a three-jaw coupling.

[0023] Furthermore, the stroke sleeve is located near one end of the grinding adjustment disc, and an internal threaded drum is provided inside, with the internal thread of the internal threaded drum engaging with the external thread of the adjustment shaft.

[0024] Furthermore, the end of the inner wire rotating drum is provided with protruding teeth, which cooperate with the protruding teeth on the grinding adjustment plate.

[0025] Furthermore, it also includes a four-opening ring, and the outer wall of the inner threaded drum is provided with a groove, which cooperates with the four-opening ring. The inner threaded drum with the four-opening ring is located inside the end of the stroke sleeve; and the outer wall of the end of the stroke sleeve is provided with multiple set screws for pressing the four-opening ring tightly.

[0026] In this technical solution, the groove cooperates with the four-opening ring. After the inner thread rotating drum is installed with the four-opening ring, it is inserted into the end of the stroke sleeve. The four-opening ring is tightened by the four set screws at the end of the stroke sleeve, ensuring that the inner thread rotating drum can rotate flexibly under the limit of the four-opening ring.

[0027] Furthermore, two anti-rotation screw holes are provided at the tail of the travel sleeve.

[0028] Furthermore, the speed reducer is equipped with supports and hangers.

[0029] In this technical solution, a support bracket is installed on the reducer for horizontally mounted medium-pressure regulating gate, providing support during grinding; and for vertically mounted medium-pressure regulating gate, serving as a suspension point during grinding.

[0030] Furthermore, the motor and the reducer are connected via a connecting flange.

[0031] Furthermore, the drive shaft connecting sleeve of the reducer is connected to the adjusting shaft via threads.

[0032] Furthermore, it also includes a fixed plate, which is sleeved on the outer wall of the adjusting shaft. The fixed plate is connected to the adjusting shaft by threads, and the fixed plate is close to the drive shaft connecting sleeve of the reducer.

[0033] In this technical solution, during use, the drive shaft connecting sleeve is rotated to expose the three-jaw coupling connected to the rotating shaft. After confirming that the three-jaw coupling on the rotating shaft is correctly connected to the three-jaw coupling connected to the drive shaft of the reducer, the drive shaft connecting sleeve is rotated in the opposite direction to the bushing of the reducer and then connected with bolts. At the same time, the handle of the fixed plate is used to rotate the fixed plate tightly against the rear seat of the drive shaft connecting sleeve, ensuring that the connection between the drive shaft connecting sleeve and the adjusting shaft is reliable and that no positional movement occurs.

[0034] Compared with the prior art, the present invention has the following beneficial effects:

[0035] 1. This utility model is provided with two parts: positioning and grinding, and independent adjustment mechanisms for the positioning and grinding parts, so as to achieve the function of coarse and fine adjustment of grinding.

[0036] 2. This utility model is equipped with a support bracket, which can complete the grinding work on valves in different directions.

[0037] 3. This utility model is an assembly component that can be disassembled and packed in a box, making it easy to carry, transport, and protect the components.

[0038] 4. This utility model has a wide range of applications. By replacing the positioning plate, grinding plate, and adjusting the positioning and grinding, the grinding of valves of different specifications and sizes can be achieved.

[0039] 5. A bearing is designed and installed between the rotating shaft and the adjusting shaft of this utility model to ensure the flexible rotation of the rotating shaft within the adjusting shaft.

[0040] 6. The stroke sleeve of this utility model connects the inner threaded drum into one piece through four open rings and set screws. At the same time, the head of the inner threaded drum is designed with convex teeth that connect with the convex teeth on the grinding adjustment plate to achieve the purpose of adjusting the shaft.

[0041] 7. This utility model has an anti-rotation groove designed on the adjusting shaft and an anti-rotation thread hole designed on the stroke sleeve, which ensures that the adjusting shaft can only move axially when the inner thread drum rotates. Attached Figure Description

[0042] Figure 1 A schematic diagram of the structure of the grinding tool for the generator medium-pressure regulating gate of this utility model, used for grinding the medium-pressure regulating gate;

[0043] Figure 2 This is a schematic diagram of the overall structure of the grinding tool for the generator medium-pressure regulating valve of this utility model;

[0044] Figure 3 For the present utility model Figure 2 The main view;

[0045] Figure 4 This is an external schematic diagram showing the connection between the reducer's bushing and the drive shaft.

[0046] Figure 5 This is an internal schematic diagram showing the connection between the reducer's bushing and the drive shaft.

[0047] Figure 6 This is a schematic diagram of the connection between the drive shaft and the rotating shaft of the speed reducer via a three-jaw coupling.

[0048] Figure 7 This is a schematic diagram showing the connection between the adjusting shaft and the rotating shaft;

[0049] Figure 8This is a schematic diagram of the connection between the stroke sleeve and the adjusting shaft;

[0050] Figure 9 This is a structural diagram of the inner threaded drum section in the stroke sleeve;

[0051] Figure 10 This is a schematic diagram of the internal thread rotating drum;

[0052] Figure 11 This is a schematic diagram of a four-open-ring structure;

[0053] Figure 12 Another schematic diagram showing the connection between the stroke sleeve and the adjusting shaft;

[0054] Figure 13 This is a schematic diagram of the adjusting shaft.

[0055] Figure label:

[0056] 1-Motor; 2-Reducer; 3-Reducer bushing; 4-Drive shaft connecting sleeve; 5-Adjusting shaft; 6-Positioning disc; 7-Grinding adjusting disc; 8-Positioning disc; 9-Grinding disc; 10-Connecting flange;

[0057] 11-Drive shaft; 12-Fixed disc; 13-Stroke sleeve; 14-Support and hanger; 15-Positioning and adjusting disc; 16-Three-jaw coupling; 17-Rotary bearing; 18-Setting screw; 19-Plug; 20-Rotary bearing;

[0058] 21-Top screw two; 22-Internal thread rotating drum; 23-Four-ring open; 24-Positioning plate fixing screw hole; 25-Anti-rotation groove; 26-Anti-rotation thread hole; 27-Medium pressure regulating door; 28-Monorail hoist. Detailed Implementation

[0059] The technical solution of this utility model will be clearly described below with reference to the accompanying drawings. Obviously, the described embodiments are not all embodiments of this utility model. All other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0060] It should be noted that the terms "center", "upper", "lower", "horizontal", "left", "right", "front", "back", "lateral", "longitudinal", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0061] Combination Figures 1-3As shown, this utility model provides a grinding tool for a generator medium-pressure regulating valve. The grinding tool mainly consists of two parts: a positioning part and a grinding part. The positioning part comprises a positioning disc 8, a positioning adjustment disc 15, and a travel sleeve 13. The positioning disc 8 is connected to the positioning adjustment disc 15 by screws on its side, allowing for the replacement of different sized positioning discs with screws to accommodate different end sizes of the medium-pressure regulating valve. The positioning adjustment disc 15 can slide on the travel sleeve 13.

[0062] In use, based on the depth of the grinding surface of the generator medium-pressure regulating valve and the valve end cover, adjust the position of the positioning adjusting plate 15 on the stroke sleeve 13, and tighten the four locking screws on the front of the positioning adjusting plate 15 to maintain stable positioning.

[0063] The grinding section consists of a motor 1, a reducer 2, a rotating shaft 11, an adjusting shaft 5, a positioning plate 6, a grinding adjusting plate 7, and a grinding plate 9.

[0064] By adjusting the positioning part and the grinding part of the grinding tool of the generator medium-pressure regulating valve, the position of the grinding disc 9 within the medium-pressure regulating valve 27 is changed.

[0065] A support bracket 14 is installed on the reducer 2, mainly used for supporting the horizontally mounted medium-pressure regulating door during grinding; and for the vertically mounted medium-pressure regulating door during grinding, which is lifted using a monorail crane 28.

[0066] Motor 1 and reducer 2 are connected via connecting flange 10.

[0067] Combination Figures 4-5 As shown, the reducer's bushing 3 is connected to the reducer's drive shaft through an internally embedded rotating bearing 17, ensuring the stability of the reducer's drive shaft during rotation.

[0068] like Figure 7 As shown, the rotating shaft 11 passes through the adjusting shaft 5 via a rotating bearing 20 embedded at each end. To prevent the rotating bearing 20 from falling off, a plug 19 is provided on the outside of the rotating bearing 20, and a set screw 18 is provided on the adjusting shaft 5 to ensure the plug 19 is secure. The rotating shaft 11 is connected to the drive shaft of the reducer via a three-jaw coupling 16.

[0069] Combination Figures 8-11 As shown, an inner threaded drum 22 is made in the stroke sleeve 13, and its inner thread is matched with the outer thread of the adjusting shaft 5; the end of the inner threaded drum 22 is made with a convex tooth, which is matched with the convex tooth on the grinding adjusting plate 7.

[0070] The inner thread spool 22 is provided with a groove, which cooperates with the fabricated four-open ring 23. After the inner thread spool 22 is installed with the four-open ring 23, it is inserted into the end of the stroke sleeve 13. The four-open ring 23 is pressed tightly by the four set screws 21 provided at the end of the stroke sleeve 13, ensuring that the inner thread spool 22 can rotate flexibly under the limit of the four-open ring 23.

[0071] Combination Figures 12-13 As shown, an anti-rotation groove 25 is made at the tail of the adjusting shaft 5, and two anti-rotation thread holes 26 are made at the tail of the stroke sleeve 13. By adjusting the bolts installed on the anti-rotation thread holes 26 and inserting them into the anti-rotation groove 25, it is ensured that the adjusting shaft 5 can smoothly enter and exit the stroke sleeve 13 when the inner thread drum 22 rotates.

[0072] Combination Figure 2-6 As shown, the drive shaft connecting sleeve 4 and the adjusting shaft 5 are connected by threads, and the fixed plate 12 and the adjusting shaft 5 are also connected by threads. In use, rotate the drive shaft connecting sleeve 4 to expose the three-jaw coupling 16 connected to the rotating shaft 11. After confirming that the three-jaw coupling 16 on the rotating shaft 11 is correctly connected to the three-jaw coupling 16 connected to the drive shaft of the reducer, rotate the drive shaft connecting sleeve 4 in the opposite direction to the bushing 3 of the reducer and connect it with bolts. At the same time, rotate the fixed plate 12 tightly against the back seat of the drive shaft connecting sleeve 4 using the handle of the fixed plate 12 to ensure that the drive shaft connecting sleeve 4 and the adjusting shaft 5 are reliably connected and do not move.

[0073] The work of the grinding section:

[0074] After the positioning part is adjusted into place, the grinding part is connected, and the grinding adjustment plate 7 is pushed into the stroke sleeve 13, so that the protruding teeth on the grinding adjustment plate 7 are interlocked with the protruding teeth of the inner thread rotating cylinder 22 embedded on the stroke sleeve 13.

[0075] Then, the positioning plate 6 is pressed tightly against the grinding adjustment plate 7, and the locking screws on the positioning plate 6 are tightened to ensure that the grinding adjustment plate 7 does not undergo axial displacement.

[0076] At this time, rotating the handle of the grinding adjustment plate 7 causes the inner thread drum 22 to rotate, and the bolt on the anti-rotation thread hole 26 is inserted into the anti-rotation groove 25, thereby driving the adjustment shaft 5 to adjust axially.

[0077] Ultimately, the grinding disc 9 reaches the ideal grinding position, and the grinding purpose is achieved by controlling the rotation speed of the motor 1.

[0078] The above technical features constitute the preferred embodiment of this utility model, which has strong adaptability and optimal implementation effect. Non-essential technical features can be added or removed according to actual needs to meet the needs of different situations.

[0079] Finally, it should be noted that the above content is only used to illustrate the technical solution of this utility model, and is not intended to limit the scope of protection of this utility model. Simple modifications or equivalent substitutions made by those skilled in the art to the technical solution of this utility model do not depart from the essence and scope of the technical solution of this utility model.

Claims

1. A grinding tool for a generator medium-voltage regulating valve, characterized in that, It includes a positioning part and a grinding part. The positioning part includes a positioning disk (8), a positioning adjustment disk (15), and a stroke sleeve (13) arranged coaxially. The positioning disk (8) is sleeved on the outer wall of the positioning adjustment disk (15), and the positioning adjustment disk (15) is rotatably connected to the outer wall of the stroke sleeve (13). The grinding part includes a motor (1), a reducer (2), a rotating shaft (11), and a grinding disc (9); the motor (1) is connected to the reducer (2), and the rotating shaft (11) and the grinding disc (9) are coaxially arranged; one end of the rotating shaft (11) is connected to the drive shaft of the reducer, and the other end is connected to the grinding disc (9) at its end; The travel sleeve (13) is connected to the outside of the rotating shaft (11).

2. The grinding tool for the generator medium-voltage regulating valve according to claim 1, characterized in that, The grinding section also includes an adjusting shaft (5) and a grinding adjusting plate (7); the rotating shaft (11) is rotatably connected to the inner wall of the adjusting shaft (5), and the stroke sleeve (13) is rotatably connected to the outer wall of the adjusting shaft (5); The grinding adjustment plate (7) is sleeved on the outer wall of the adjustment shaft (5). The inside of the stroke sleeve (13) near the end of the grinding adjustment plate (7) is provided with protruding teeth. The grinding adjustment plate (7) near the side of the stroke sleeve (13) is also provided with matching protruding teeth. The tail of the adjusting shaft (5) is provided with an anti-rotation groove (25), and the tail of the stroke sleeve (13) is provided with at least one anti-rotation screw hole (26). A bolt is provided in the anti-rotation screw hole (26) and inserted into the anti-rotation groove (25).

3. The grinding tool for the generator medium-voltage regulating valve according to claim 2, characterized in that, The grinding part also includes a positioning plate (6); the positioning plate (6) is sleeved on the outer wall of the adjusting shaft (5), and the grinding adjusting plate (7) is located between the positioning plate (6) and the stroke sleeve (13); a locking screw is provided on the positioning plate (6).

4. The grinding tool for the generator medium-voltage regulating valve according to claim 3, characterized in that, The adjusting shaft (5) is inlaid with rotating bearings (20) at both ends. The rotating shaft (11) passes through the adjusting shaft (5). A plug (19) is provided on the outside of each rotating bearing (20), and a set screw (18) is provided on the adjusting shaft (5).

5. The grinding tool for the generator medium-voltage regulating valve according to claim 4, characterized in that, The stroke sleeve (13) is located near one end of the grinding adjustment plate (7), and an inner thread drum (22) is provided inside. The inner thread of the inner thread drum (22) is matched with the outer thread of the adjustment shaft (5).

6. The grinding tool for the generator medium-voltage regulating valve according to claim 5, characterized in that, The end of the inner wire rotating drum (22) is provided with protruding teeth, which are matched with the protruding teeth on the grinding adjustment plate (7).

7. The grinding tool for the generator medium-voltage regulating valve according to claim 5, characterized in that, It also includes a four-ring, and the outer wall of the inner wire drum (22) is provided with a groove, which is matched with the four-ring (23). The inner wire drum (22) with the four-ring (23) is located inside the end of the stroke sleeve (13); and the outer wall of the end of the stroke sleeve (13) is provided with a plurality of top screws (21) for pressing the four-ring (23).

8. The grinding tool for the generator medium-voltage regulating valve according to any one of claims 1-7, characterized in that, The speed reducer (2) is equipped with a support bracket (14).

9. The grinding tool for the generator medium-voltage regulating valve according to any one of claims 2-7, characterized in that, The drive shaft connecting sleeve (4) of the reducer is connected to the adjusting shaft (5) by thread.

10. The grinding tool for the generator medium-voltage regulating valve according to claim 9, characterized in that, It also includes a fixed plate (12), which is sleeved on the outer wall of the adjusting shaft (5). The fixed plate (12) is connected to the adjusting shaft (5) by a thread, and the fixed plate (12) is close to the drive shaft connecting sleeve (4) of the reducer.

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