A narrow gap cleaning work device

Abstract

The utility model discloses a kind of narrow gap cleaning operation devices, including two cleaning mechanisms, and the two cleaning mechanisms are elastically connected and supported by multiple elastic mechanisms between, the cleaning mechanism includes rack and cleaning unit and walking unit mounted on rack, cleaning unit is used to clean inside narrow gap, walking unit is used to drive rack to walk inside narrow gap. Two cleaning mechanisms are elastically connected and supported by multiple elastic mechanisms between, so as to be able to self-adapting the width of gap, not easy to fall during operation, and walking by walking unit load rack, cleaning by cleaning unit, structure is more simple.

Description

Technical Field

[0001] This utility model relates to the field of maintenance tools for hydro generators, and in particular to a narrow-gap cleaning device. Background Technology

[0002] After a hydroelectric generator has completed one operating cycle, a significant amount of dust accumulates on the inner walls of the stator and the outer walls of the rotor, which can severely impact normal operation. Traditionally, the dust is cleaned manually from both the inner stator and outer rotor walls while the generator rotor is lifted out. However, without removing the rotor, cleaning the dust from both surfaces becomes impossible due to the clearance between the stator and rotor.

[0003] To address this issue, Chinese patent document CN119467180A, published on February 18, 2025, discloses a peristaltic cleaning device for narrow gaps in a water turbine. This device includes an airbag unit, a frame, a cleaning unit, and an air supply control unit. Two airbag units are located on either side of the frame. One end of each airbag unit is fixedly connected to the frame, and the other end is slidably connected to the frame. The cleaning unit and the air supply control unit are mounted on the frame. The cleaning unit cleans the water turbine, and the air supply control unit controls the air supply to the airbag units, causing them to expand and contract, thus supporting the frame in a peristaltic movement. When the airbag unit expands, the cleaning device can fit into the gap between the turbine stator and rotor. When one end of the airbag unit releases air, the airbag unit contracts, allowing the cleaning device to move within the gap. Its advantages are: the cleaning device greatly improves the cleaning efficiency of the gap between the stator and rotor of a large hydro-generator, resulting in a better cleaning effect; its disadvantages are: the expansion and contraction of the airbag unit, which causes the load frame to move in a creeping manner, not only makes the structure more complex, but also makes the movement control more complicated, and there is a greater risk of falling during operation. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the problems existing in the background art and provide a narrow gap cleaning device. The two cleaning mechanisms are elastically connected and supported by multiple elastic mechanisms, so that they can adapt to the width of the gap. They are not easy to fall off during operation. Furthermore, the device moves by a load frame through a walking unit and performs cleaning through a cleaning unit, making the structure simpler.

[0005] To achieve the above-mentioned technical features, the purpose of this utility model is as follows: a narrow gap cleaning device, comprising two cleaning mechanisms, which are elastically connected and supported by multiple elastic mechanisms. Each cleaning mechanism includes a frame and a cleaning unit and a walking unit mounted on the frame. The cleaning unit is used to clean the inside of the narrow gap, and the walking unit is used to drive the frame to walk inside the narrow gap.

[0006] The frame is provided with at least one elongated hole for the roller brush. The cleaning unit includes a drive roller, a driven roller, a belt brush, and a first reduction motor. The drive roller is rotatably mounted at one end of the elongated hole for the roller brush, and the driven roller is rotatably mounted at the other end of the elongated hole for the roller brush. The belt brush is fitted and tensioned on the drive roller and the driven roller. The output shaft of the first reduction motor is connected to the drive roller for transmission.

[0007] The elongated hole of the roller brush has placement grooves at both ends of the drive roller. First bearings are installed on the central shaft at both ends of the drive roller. The first bearings at both ends are installed in the placement grooves on both sides. A pressure plate is installed on the top of the placement groove by screws, and the pressure plate fixes the first bearing in the placement groove.

[0008] The frame has a first mounting groove on one side of the drive roller. A first geared motor and a first right-angle reducer are installed in the first mounting groove. The input shaft of the first right-angle reducer is connected to the output shaft of the first geared motor through a coupling. The output shaft of the first right-angle reducer is connected to the central shaft of one end of the drive roller. A polygonal hole is provided at the end of the central shaft. The output shaft of the first right-angle reducer is adapted to the polygonal hole and is inserted into the polygonal hole.

[0009] The frame has roller holes at its four corners. The walking unit includes a drive wheel, a driven wheel, and a second geared motor. The drive wheel is installed in the two roller holes at one end of the frame, and the driven wheel is installed in the two roller holes at the other end through a wheel axle. The output shaft of the second geared motor is connected to the drive wheel for transmission.

[0010] The drive wheel is mounted on the output shaft of the second geared motor.

[0011] The frame has a second mounting slot located inside the elongated hole of the roller. A second geared motor and a second right-angle reducer are installed in the second mounting slot. The input shaft of the second right-angle reducer is connected to the output shaft of the second geared motor through a coupling. The output shaft of the second right-angle reducer extends into the elongated hole of the roller, and the drive wheel is fixedly installed on the output shaft of the second right-angle reducer.

[0012] Inside the elongated hole of the roller brush, between the driving roller and the driven roller, at least one support roller is also installed. The support roller is rotatably mounted on a support shaft, and both ends of the support shaft are mounted on the frame.

[0013] The elastic mechanism includes a sliding sleeve, a sliding column, and a spring. One end of the sliding sleeve is fixedly connected to the frame of one of the cleaning mechanisms. One end of the sliding column is slidably inserted into the other end of the sliding sleeve. The other end of the sliding column is fixedly connected to the frame of another cleaning mechanism. The spring is installed inside the sliding sleeve. The sliding column compresses the spring. A limiting elongated hole is provided axially on the sliding sleeve. A limiting post is provided at the end of the sliding column that is inserted into the sliding sleeve. The limiting post extends into the limiting elongated hole.

[0014] The rack has a camera mounted on at least one side.

[0015] Compared with the prior art, the outstanding features of this utility model, which adopts the above technical solution, are:

[0016] 1. The two cleaning mechanisms of this utility model are elastically connected and supported by multiple elastic mechanisms, which can adapt to the width of the gap, making it less likely to fall off during operation. Furthermore, the frame moves by a walking unit and the cleaning unit performs cleaning, making the structure simpler.

[0017] 2. This utility model uses a first geared motor to drive the active roller to rotate, which in turn drives the belt brush and the driven roller to rotate. The belt brush cleans the rotor or stator. A second geared motor drives the active wheel to rotate, which in turn moves the frame. The structure is simple. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of this application or the prior art, the accompanying drawings used in the description of the embodiments or the prior art will be briefly introduced below.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This is a schematic diagram of the main structure of this utility model.

[0021] Figure 3 This is a schematic diagram of the internal structure of the cleaning mechanism of this utility model.

[0022] Figure 4 for Figure 3 Schematic diagram of the cross-sectional structure of AA.

[0023] Figure label:

[0024] Cleaning mechanism 10, frame 11, roller brush elongated hole 12, first mounting groove 13, roller elongated hole 14, second mounting groove 15, placement groove 16;

[0025] Elastic mechanism 20, sliding sleeve 21, sliding column 22, spring 23, limiting elongated hole 24, limiting post 25;

[0026] Cleaning unit 30, drive roller 31, central shaft 311, first bearing 312, pressure plate 313, driven roller 32, driven shaft 321, belt brush 33, first geared motor 34, first right angle reducer 35, support roller 36, support shaft 361;

[0027] Walking unit 40, driving wheel 41, driven wheel 42, second geared motor 43, second right angle reducer 44, wheel axle 45, bearing 46, washer 47;

[0028] Camera 50. Detailed Implementation

[0029] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0030] It should be noted that the use of terms such as "an embodiment," "an embodiment," "an exemplary embodiment," and "some embodiments" in the specification indicates that the described embodiment may include a specific feature, structure, or characteristic, but not every embodiment necessarily includes that specific feature, structure, or characteristic. Furthermore, when a specific feature, structure, or characteristic is described in connection with an embodiment, implementing such a feature, structure, or characteristic in conjunction with other embodiments (whether explicitly described or not) should be within the knowledge of those skilled in the art.

[0031] Example 1:

[0032] See Figure 1-4 A narrow-gap cleaning device includes two cleaning mechanisms 10, which are elastically connected and supported by multiple elastic mechanisms 20. Each cleaning mechanism 10 includes a frame 11 and a cleaning unit 30 and a traveling unit 40 mounted on the frame 11. The cleaning unit 30 cleans the interior of the narrow gap, and the traveling unit 40 drives the frame 11 to move within the narrow gap. The elastic connection and support between the two cleaning mechanisms 10 via the multiple elastic mechanisms 20 allows for adaptation to the gap width, preventing them from falling off during operation. Furthermore, the device simplifies the structure by using the traveling unit 40 to support the frame 11 for movement and the cleaning unit 30 for cleaning.

[0033] In this embodiment, there are 4 to 9 elastic mechanisms 20.

[0034] See Figure 2 , 3The frame 11 is provided with at least one elongated brush hole 12. The cleaning unit 30 includes a drive roller 31, a driven roller 32, a belt brush 33, and a first reduction motor 34. The drive roller 31 is rotatably mounted on one end of the elongated brush hole 12, and the driven roller 32 is rotatably mounted on the other end of the elongated brush hole 12. The belt brush 33 is fitted and tensioned on the drive roller 31 and the driven roller 32. The output shaft of the first reduction motor 34 is drively connected to the drive roller 31. Figure 3 The belt brush 33 is not shown. The first reduction motor 34 drives the drive roller 31 to rotate, thereby driving the belt brush 33 and the driven roller 32 to rotate, and the belt brush 33 cleans the rotor or stator.

[0035] In this embodiment, two elongated brush holes 12 are arranged parallel to each other on the frame 11. The driven roller 32 is mounted on the driven shaft 321, and the two ends of the driven shaft 321 can be welded to the frame 11 or fixed to the frame 11 by insertion through mounting holes.

[0036] Specifically, see Figure 3 , 4 The elongated hole 12 of the roller brush has placement grooves 16 at both ends of the drive roller 31. First bearings 312 are mounted on the central shaft 311 at both ends of the drive roller 31. The first bearings 312 at both ends are respectively installed in the placement grooves 16 on both sides. A pressure plate 313 is screwed onto the top of the placement groove 16, fixing the first bearings 312 within the placement groove 16. (See also...) Figure 3 The length of the pressure plate 313 is greater than the width of the placement slot 16, and the pressure plate 313 is installed on the frame 11 by countersunk screws.

[0037] Further, see Figure 3 , 4 The frame 11 has a first mounting groove 13 on one side of the drive roller 31. A first geared motor 34 and a first right-angle reducer 35 are mounted in the first mounting groove 13. The input shaft of the first right-angle reducer 35 is connected to the output shaft of the first geared motor 34 via a coupling. The output shaft of the first right-angle reducer 35 is connected to the central shaft 311 at one end of the drive roller 31. A polygonal hole is provided at the end of the central shaft 311, and the output shaft of the first right-angle reducer 35 is fitted into the polygonal hole. This structure allows the first geared motor 34 to be mounted longitudinally, reducing the width of the frame 11, enabling the device to accommodate the gap between the rotor and the roller, and providing mounting space for the drive wheel 41 and driven wheel 42 of the traveling unit 40.

[0038] Example 2:

[0039] Based on Example 1, see Figure 3The frame 11 has roller holes 14 at its four corners. The traveling unit 40 includes a driving wheel 41, driven wheels 42, and a second geared motor 43. The driving wheel 41 is installed in two roller holes 14 at one end of the frame 11, and the driven wheel 42 is installed in two roller holes 14 at the other end via axles 45. The output shaft of the second geared motor 43 is connected to the driving wheel 41 for transmission. The second geared motor 43 drives the driving wheel 41 to rotate, thereby moving the frame 11.

[0040] Specifically, see Figure 4 The driven wheel 42 is installed in the roller elongated hole 14 through the wheel axle 45. The wheel axle 45 is equipped with a bearing 46. One end of the wheel axle 45 is limited by a flange to one side bearing 46, and the other end is limited by a washer 47 to the other side bearing 46.

[0041] In one embodiment, the drive wheel 41 is mounted on the output shaft of the second geared motor 43.

[0042] In another option, see Figure 3 The frame 11 has a second mounting groove 15 located inside the elongated hole 14 of the roller. A second geared motor 43 and a second right-angle reducer 44 are mounted in the second mounting groove 15. The input shaft of the second right-angle reducer 44 is connected to the output shaft of the second geared motor 43 via a coupling. The output shaft of the second right-angle reducer 44 extends into the elongated hole 14 of the roller. The drive wheel 41 is fixedly mounted on the output shaft of the second right-angle reducer 44. This structure allows the second geared motor 43 to be mounted longitudinally, reducing the width of the frame 11 and enabling the device to accommodate the gap between the rotor and the main body.

[0043] Example 3:

[0044] Based on Example 1 or Example 2, see Figure 3 Inside the elongated hole 12 of the roller brush, between the driving roller 31 and the driven roller 32, two support rollers 36 are also installed. The support rollers 36 are rotatably mounted on a support shaft 361, the two ends of which are mounted on the frame 11. By setting the support rollers 36, the support rollers 36 support the upper layer of the belt brush 33, that is, the working layer, so that the working layer of the belt brush 33 can better contact the working surface.

[0045] Specifically, the support roller 36 can be movably mounted on the support shaft 361, or it can be mounted on the support shaft 361 via bearings. The support shaft 361 can be welded to the frame 11, or it can be fixed by insertion through mounting holes.

[0046] Example 4:

[0047] Based on Example 1, 2, or 3, see [link to example]. Figure 2The elastic mechanism 20 includes a sliding sleeve 21, a sliding column 22, and a spring 23. One end of the sliding sleeve 21 is welded to the frame 11 of one of the cleaning mechanisms 10. One end of the sliding column 22 is slidably inserted into the other end of the sliding sleeve 21, and the other end of the sliding column 22 is welded to the frame 11 of the other cleaning mechanism 10. The spring 23 is installed inside the sliding sleeve 21, and the sliding column 22 compresses the spring 23. A limiting elongated hole 24 is axially provided on the sliding sleeve 21, and a limiting post 25 is provided at the end of the sliding column 22 that is inserted into the sliding sleeve 21. The limiting post 25 extends into the limiting elongated hole 24. Through the above structure, the cleaning mechanisms 10 on both sides are elastically connected and supported.

[0048] In addition to the above-mentioned structure, the elastic mechanism 20 can also be made directly from a spring.

[0049] See Figure 1 , 2 There can be four elastic mechanisms 20, with each of the four elastic mechanisms 20 installed at one of the four corners of the frame 11. Alternatively, it can be as follows: Figure 1 The diagram shows the use of 6, 8, or 9.

[0050] Example 5:

[0051] Based on Example 1, 2, 3, or 4, see [link to example]. Figure 1 At least one side of the rack 11 is equipped with a camera 50 for remote observation of the situation inside the gap.

[0052] The working principle or working process of this utility model:

[0053] In use, the two cleaning mechanisms 10 of the device are pressed inward and placed in the gap between the stator and the rotor. The two cleaning mechanisms 10 are elastically supported by the elastic mechanism 20, so that they can adapt to the width of the gap.

[0054] The working device is electrically connected to the first geared motor 34, the second geared motor 43, and the camera 50 via an umbilical cable. An external control unit supplies power and controls the first geared motor 34, the second geared motor 43, and the camera 50. Controlling the rotation of the first geared motor 34 controls the rotation of the belt brush 33; the belt brushes on both sides rotate, simultaneously cleaning the rotor and stator. Controlling the rotation of the second geared motor 43 controls the rotation of the drive wheel 41, allowing the device to move up and down within a certain range. (See also...) Figure 1 When moving, the second reduction motors 43 on the two cleaning mechanisms 10 rotate in opposite directions.

[0055] While specific embodiments of the present invention have been described above, those skilled in the art should understand that the specific embodiments described are merely illustrative and not intended to limit the scope of the present invention. Any modifications and variations made by those skilled in the art in accordance with the spirit of the present invention should be covered within the scope of protection of the claims of the present invention.

Claims

1. A narrow-gap cleaning device, characterized in that: It includes two cleaning mechanisms (10), which are elastically connected and supported by multiple elastic mechanisms (20). Each cleaning mechanism (10) includes a frame (11) and a cleaning unit (30) and a walking unit (40) mounted on the frame (11). The cleaning unit (30) is used to clean the inside of the narrow gap, and the walking unit (40) is used to drive the frame (11) to walk inside the narrow gap.

2. The narrow-gap cleaning device according to claim 1, characterized in that: The frame (11) is provided with at least one long hole (12) for a roller brush. The cleaning unit (30) includes an active roller (31), a driven roller (32), a belt brush (33), and a first reduction motor (34). The active roller (31) is rotatably mounted on one end of the long hole (12) for the roller brush, and the driven roller (32) is rotatably mounted on the other end of the long hole (12) for the roller brush. The belt brush (33) is fitted and tensioned on the active roller (31) and the driven roller (32). The output shaft of the first reduction motor (34) is connected to the active roller (31) for transmission.

3. A narrow-gap cleaning device according to claim 2, characterized in that: The long hole (12) of the roller brush is provided with a placement groove (16) at both ends of the active roller (31). The first bearing (312) is installed on the central shaft (311) at both ends of the active roller (31). The first bearing (312) at both ends is installed in the placement groove (16) on both sides. The top of the placement groove (16) is fitted with a pressure plate (313) by screws. The pressure plate (313) fixes the first bearing (312) in the placement groove (16).

4. A narrow-gap cleaning device according to claim 3, characterized in that: The frame (11) has a first mounting groove (13) on one side of the drive roller (31). A first geared motor (34) and a first right-angle reducer (35) are installed in the first mounting groove (13). The input shaft of the first right-angle reducer (35) is connected to the output shaft of the first geared motor (34) through a coupling. The output shaft of the first right-angle reducer (35) is connected to the central shaft (311) at one end of the drive roller (31). A polygonal hole is provided at the end of the central shaft (311). The output shaft of the first right-angle reducer (35) is adapted to the polygonal hole and is inserted into the polygonal hole.

5. A narrow-gap cleaning device according to claim 1, characterized in that: The frame (11) has roller elongated holes (14) at its four corners. The walking unit (40) includes a drive wheel (41), a driven wheel (42), and a second geared motor (43). The drive wheel (41) is installed in the two roller elongated holes (14) at one end of the frame (11), and the driven wheel (42) is installed in the two roller elongated holes (14) at the other end through a wheel axle (45). The output shaft of the second geared motor (43) is connected to the drive wheel (41) for transmission.

6. A narrow-gap cleaning device according to claim 5, characterized in that: The drive wheel (41) is mounted on the output shaft of the second geared motor (43).

7. A narrow-gap cleaning device according to claim 5, characterized in that: The frame (11) has a second mounting groove (15) located inside the roller elongated hole (14). A second geared motor (43) and a second right-angle reducer (44) are installed in the second mounting groove (15). The input shaft of the second right-angle reducer (44) is connected to the output shaft of the second geared motor (43) through a coupling. The output shaft of the second right-angle reducer (44) extends into the roller elongated hole (14). The drive wheel (41) is fixedly installed on the output shaft of the second right-angle reducer (44).

8. A narrow-gap cleaning device according to claim 2, characterized in that: Inside the elongated hole (12) of the roller brush, between the driving roller (31) and the driven roller (32), at least one support roller (36) is also installed. The support roller (36) is rotatably mounted on a support shaft (361), and both ends of the support shaft (361) are mounted on the frame (11).

9. A narrow-gap cleaning device according to claim 1, characterized in that: The elastic mechanism (20) includes a sliding sleeve (21), a sliding column (22), and a spring (23). One end of the sliding sleeve (21) is fixedly connected to the frame (11) of one of the cleaning mechanisms (10). One end of the sliding column (22) is slidably inserted into the other end of the sliding sleeve (21). The other end of the sliding column (22) is fixedly connected to the frame (11) of another cleaning mechanism (10). The spring (23) is installed inside the sliding sleeve (21). The sliding column (22) compresses the spring (23). A limiting long hole (24) is provided axially on the sliding sleeve (21). A limiting post (25) is provided at the end of the sliding column (22) inserted into the sliding sleeve (21). The limiting post (25) extends into the limiting long hole (24).

10. A narrow-gap cleaning device according to any one of claims 1 to 9, characterized in that: The rack (11) has a camera (50) mounted on at least one side.

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