A gas collecting device for water turbine generator rotor overhaul

Abstract

The utility model discloses a gas collecting device for water -turbine generator rotor overhauls, including fixed base, support unit, transverse arm, first gas collecting cover and collection unit, support unit longitudinal installation is in fixed base, and multiple transverse arms are radially arranged, and one end of transverse arm is fixed with support unit upper end installation, and the other end is equipped with first gas collecting cover, and support unit has the longitudinal air duct in, and the air duct upper end is closed, and the support unit upper end is provided with collection interface in the position of corresponding transverse arm, and collection interface communicates with air duct. When water -turbine generator rotor overhauls, install the exhaust gas collecting device of the utility model at the center hole of water -turbine generator rotor top, and the air in first gas collecting cover is extracted by exhaust fan, thereby through first gas collecting cover to the gas of cleaning agent volatilization and the welding gas are collected.

Description

Technical Field

[0001] This utility model relates to the technical field of auxiliary equipment for the maintenance of hydro-generator rotors, and in particular to a gas collection device for the overhaul of hydro-generator rotors. Background Technology

[0002] Currently, cleaning agents are used to clean the rotor poles and center body of hydro-generators. These agents evaporate, producing polluting gases, and welding operations also generate some polluting gases. Since there is currently no corresponding recovery device, the waste gases cannot be recovered, and the gases from the evaporating cleaning agents and welding are directly discharged into the plant, causing overall air pollution and environmental pollution, which in turn affects the health of the workers. To collect these polluting gases as much as possible, we have designed a gas collection device for use during the maintenance of hydro-generator rotors. Utility Model Content

[0003] The technical problem to be solved by this utility model is to solve the problems existing in the background art and provide a gas collection device for the overhaul of a hydro-generator rotor. When the hydro-generator rotor is overhauled, the exhaust gas collection device of this utility model is installed at the central hole at the top of the hydro-generator rotor. The exhaust fan draws out the air in the first gas collection hood, thereby collecting the gas volatilized by the cleaning agent and the welding gas through the first gas collection hood.

[0004] The purpose of this utility model is achieved as follows: A gas collection device for overhauling a hydro-generator rotor includes a fixed base, a support unit, transverse arms, a first gas collection hood, and a collection unit. The support unit is longitudinally mounted on the fixed base, and multiple transverse arms are arranged radially. One end of each transverse arm is fixedly mounted to the upper end of the support unit, and the other end is fitted with the first gas collection hood. The support unit has a longitudinal air duct, the upper end of which is closed. A collection interface is provided at the upper end of the support unit at the position corresponding to the transverse arm, and the collection interface is connected to the air duct. The collection unit includes an exhaust fan, a first suction pipe, and a second suction pipe. One end of the first suction pipe is connected to the lower end of the air duct of the support unit, and the other end is connected to the air inlet of the exhaust fan. One end of the second suction pipe is connected to the collection interface, and the other end is connected to the first suction pipe inlet of the first gas collection hood.

[0005] The mounting base includes a boss and a base plate. The base plate is fixed to the lower end of the boss and has mounting holes. The support unit includes a support tube that passes longitudinally through the boss and is connected to the boss. The top of the support tube is closed, and the air duct is formed inside the support tube. The collection interface is fixed to the upper end of the support tube, and the first suction pipe is connected to the lower end of the support tube.

[0006] The support tube is rotatably connected to the center hole of the boss, and a rotary joint is installed at the lower end of the support tube. The first suction tube is connected to the rotary joint.

[0007] The rotary joint includes a first pipe section and a second pipe section. The upper inner wall of the first pipe section is provided with internal threads, and the lower outer wall of the support pipe is provided with external threads. The upper end of the first pipe section is screwed to the lower end of the support pipe. Two positioning bearings are fixedly installed on the lower outer wall of the first pipe section. The upper end of the second pipe section is fitted onto the outer ring of the two positioning bearings. The lower end of the second pipe section is connected to the first suction pipe. A spacer is installed between the two positioning bearings. A sealing groove is provided in the middle of the outer wall of the spacer. A sealing ring is installed in the sealing groove. The outer circumference of the sealing ring is in elastic contact with the inner wall of the second pipe section.

[0008] It also includes a rotary drive unit, which is used to drive the support tube to rotate.

[0009] The rotary drive unit includes a geared motor, a drive wheel, and a driven wheel. The geared motor is mounted on a boss, and the drive wheel is mounted on the output shaft of the geared motor. The driven wheel is fixedly mounted on the support tube, and the drive wheel and the driven wheel are connected in a transmission connection to drive the support tube to rotate.

[0010] The support unit also includes a fixed tube, which is slidably fitted onto the outside of the support tube. The inner wall of the fixed tube and the outer wall of the support tube are fitted polygonal structures. The fixed tube is rotatably connected to the center hole of the boss for support. The rotary drive unit includes a geared motor, a drive wheel, and a driven wheel. The geared motor is mounted on the boss, and the drive wheel is mounted on the output shaft of the geared motor. The driven wheel is fixedly mounted on the fixed tube, and the drive wheel and the driven wheel are connected by a drive mechanism. A first lug is fixedly mounted on the outer wall of the support tube on the upper side of the fixed tube, and a second lug is fixedly mounted on the outer wall of the fixed tube. A push rod device is installed between the first lug and the second lug.

[0011] The end of the transverse arm away from the support unit is connected to support two first ring bodies. Multiple first gas collection hoods are installed on the upper side of the two first ring bodies. Connecting pipe ports are respectively provided on both sides of the first gas collection hoods. The connecting pipe ports between adjacent first gas collection hoods are connected by connecting pipes. A perforated plate is installed at the bottom of the first gas collection hood. The first air intake port that is not connected to the second air intake pipe is sealed with a plug. Connecting seats are installed at the four corners of the lower side of the first gas collection hood. The connecting seats include a fixed block and a movable block. The fixed block is fixed to the lower side of the first gas collection hood. A groove for clamping the first ring body is provided between the fixed block and the movable block. The movable block is installed on the fixed block with screws to clamp the first ring body in the connecting seat.

[0012] The middle part of the transverse arm is connected and supported by two second ring bodies. Multiple second gas collection hoods are installed on the upper side of the two second ring bodies. The second gas collection hoods have the same structure as the first gas collection hoods. Adjacent second gas collection hoods are connected to each other through connecting pipes. A four-way connector is connected to the second suction pipe. Two of the opposite ports of the four-way connector are connected to the second suction pipe, and the other two opposite ports are connected to the connecting pipes on both sides respectively.

[0013] The first gas collecting hood is also provided with an auxiliary air intake on the side opposite to the first air intake port. The auxiliary air intake port is used to connect to the air intake cylinder through a hose.

[0014] The features of this utility model using the above-mentioned technical solution are: 1. The fixed base of this utility model is used to install the middle of the working platform on the top of the hydro generator rotor. The support unit is installed on the fixed base, and multiple transverse arms are radially welded to the support unit. The end of the transverse arm away from the support unit is equipped with a first gas collection hood. The exhaust fan is used to extract the air in the first gas collection hood, thereby collecting the gas volatilized by the cleaning agent on the outer circumference of the hydro generator rotor through the first gas collection hood.

[0015] 2. The support tube of this utility model can rotate. When cleaning the outer circumference of the hydro generator rotor, the first gas collection hood can be rotated so that the first gas collection hood is located above the local cleaning area, and the overall number of the first gas collection hood can also be reduced.

[0016] 3. This utility model installs two second ring bodies in the middle of the transverse arm, thereby installing multiple second gas collection hoods on the upper side of the two second ring bodies, so as to collect the volatile gas when cleaning the inner circumference of the hydro generator rotor.

[0017] 4. The first gas collecting hood of this utility model is also provided with an auxiliary air intake on the side opposite to the first air intake port. The auxiliary air intake is used to connect to the air intake cylinder through a hose, so as to collect welding fumes on the ground. When the auxiliary air intake is not connected to the air intake cylinder, a plug is installed on the auxiliary air intake to seal it. 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 schematic diagram of the overall structure of this utility model.

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

[0021] Figure 3 This is a structural schematic diagram from another perspective of the present invention.

[0022] Figure 4 This is a structural schematic diagram of the fixing base and support unit of this utility model.

[0023] Figure 5 This is a schematic diagram of the structure of the first gas collection hood of this utility model.

[0024] Figure 6 for Figure 3 Enlarged structural diagram at point A in the middle.

[0025] Figure 7 This is a schematic diagram of the utility model in use.

[0026] Figure label: Hydropower generator rotor 1, working platform 2; Fixed base 10, boss 11, support bearing 111, base plate 12, mounting hole 121; Support unit 20, support tube 21, first ear seat 211, collection interface 212, fixing tube 22, second ear seat 221, rotary joint 23, first pipe section 231, second pipe section 232, positioning bearing 233, spacer ring 234, sealing ring 235, air duct 24, push rod device 25. Rotary drive unit 30, geared motor 31, driving wheel 32, driven wheel 33 Lateral arm 40, First gas collection hood 50, first air intake port 51, plug cap 511, connecting pipe port 52, auxiliary air intake port 53, hose 54, air intake cylinder 55, connecting seat 56, fixed block 561, movable block 562, connecting pipe 57, orifice plate 58. First ring body 60; Second ring body 70, second gas collecting hood 80. Collection unit 90, exhaust fan 91, first suction pipe 92, second suction pipe 93, exhaust pipe 94, four-way connector 95; Centralized flue gas treatment device 100. Detailed Implementation

[0027] 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.

[0028] 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.

[0029] Example 1: See Figure 1-7 A gas collection device for overhauling a hydro-generator rotor includes a fixed base 10, a support unit 20, transverse arms 40, a first gas collection hood 50, and a collection unit 90. The support unit 20 is longitudinally mounted on the fixed base 10. Multiple transverse arms 40 are arranged radially. One end of each transverse arm 40 is fixedly mounted to the upper end of the support unit 20, and the other end is mounted with the first gas collection hood 50. The support unit 20 has a longitudinal air duct 24, the upper end of which is closed. A collection interface 212 is provided at the upper end of the support unit 20 at the position corresponding to the transverse arm 40. The collection interface 212 is connected to the air duct 24. The collection unit 90 includes an exhaust fan 91, a first suction pipe 92, and a second suction pipe 93. One end of the first suction pipe 92 is connected to the lower end of the support unit 20 located in the air duct 24, and the other end is connected to the air inlet of the exhaust fan 91. One end of the second suction pipe 93 is connected to the collection interface 212, and the other end is connected to the first suction port 51 of the first gas collection hood 50.

[0030] The fixed base 10 is used to install the middle of the working platform 2 on the top of the turbine generator rotor 1. The support unit 20 is installed on the fixed base 10. Multiple transverse arms 40 are radially welded to the support unit 20. A first gas collection hood 50 is installed at the end of the transverse arm 40 away from the support unit 20. The exhaust fan 91 is used to extract the air in the first gas collection hood 50, thereby collecting the gas volatilized by the cleaning agent and the welding gas through the first gas collection hood 50.

[0031] See Figure 4 The mounting base 10 includes a boss 11 and a base plate 12. The base plate 12 is fixed to the lower end of the boss 11, and a mounting hole 121 is provided on the base plate 12. The support unit 20 includes a support tube 21, which passes longitudinally through the boss 11 and is connected to the boss 11. The top of the support tube 21 is closed, and an air duct 24 is formed inside the support tube 21. A collection interface 212 is fixed to the upper end of the support tube 21, and a first suction pipe 92 is connected to the lower end of the support tube 21. In this embodiment, the support tube 21 is welded and fixed to the boss 11.

[0032] Example 2: Based on Example 1, see Figure 1 ,4 The support pipe 21 is rotatably connected to the center hole of the boss 11, and a rotary joint 23 is installed at the lower end of the support pipe 21. The first suction pipe 92 is connected to the rotary joint 23. This structure allows the support pipe 21 to rotate, enabling the first gas collecting hood 50 to be rotated and positioned above the localized cleaning area when performing localized cleaning of the outer circumference of the turbine generator rotor 1. In this design, four transverse arms 40 are provided, and a first gas collecting hood 50 is welded to the end of each transverse arm 40 furthest from the support unit 20.

[0033] Specifically, see Figure 4 The rotary joint 23 includes a first pipe section 231 and a second pipe section 232. The upper inner wall of the first pipe section 231 has internal threads, and the lower outer wall of the support pipe 21 has external threads. The upper end of the first pipe section 231 is screwed onto the lower end of the support pipe 21. Two positioning bearings 233 are fixedly installed on the lower outer wall of the first pipe section 231. The upper end of the second pipe section 232 is fitted onto the outer ring of the two positioning bearings 233. The lower end of the second pipe section 232 is connected to the first suction pipe 92. A spacer ring 234 is installed between the two positioning bearings 233. A sealing groove is provided in the middle of the outer wall of the spacer ring 234, and a sealing ring 235 is installed in the sealing groove. The outer circumference of the sealing ring 235 elastically contacts the inner wall of the second pipe section 232. With this structure, when the support pipe 21 rotates, the first suction pipe 92 will not rotate with it, thus preventing the first suction pipe 92 from becoming entangled.

[0034] In use, the upper end of the first pipe section 231 is screwed to the lower end of the support pipe 21. The first suction pipe 92 is fitted onto the lower outer side of the second pipe section 232 and fixed to the second pipe section 232 by a clamp.

[0035] Example 3: Based on Example 2, see Figure 1 The present invention also includes a rotation drive unit 30, which is used to drive the support tube 21 to rotate.

[0036] In this embodiment, see Figure 4 The rotary drive unit 30 includes a geared motor 31, a drive wheel 32, and a driven wheel 33. The geared motor 31 is mounted on the boss 11. The drive wheel 32 is mounted on the output shaft of the geared motor 31. The driven wheel 33 is fixedly mounted on the support tube 21. The drive wheel 32 and the driven wheel 33 are connected in a transmission to drive the support tube 21 to rotate.

[0037] In this embodiment, both the driving wheel 32 and the driven wheel 33 can be gears, and the driving wheel 32 and the driven wheel 33 mesh with each other; both the driving wheel 32 and the driven wheel 33 can be pulleys, and the driving wheel 32 and the driven wheel 33 are connected and driven by a belt.

[0038] Example 4: Based on Example 2, see Figure 4 The support unit 20 also includes a fixed tube 22, which is slidably fitted onto the outside of the support tube 21. The inner wall of the fixed tube 22 and the outer wall of the support tube 21 are fitted polygonal structures. The fixed tube 22 and the center hole of the boss 11 are rotatably connected and supported by the support bearing 111. The rotary drive unit 30 includes a reduction motor 31, a drive wheel 32, and a driven wheel 33. The reduction motor 31 is mounted on the boss 11. The drive wheel 32 is mounted on the output shaft of the reduction motor 31. The driven wheel 33 is fixedly mounted on the fixed tube 22. The drive wheel 32 and the driven wheel 33 are connected in a transmission manner. A first ear seat 211 is fixedly mounted on the outer wall of the support tube 21 above the fixed tube 22. A second ear seat 221 is fixedly mounted on the outer wall of the fixed tube 22. A push rod device 25 is installed between the first ear seat 211 and the second ear seat 221.

[0039] The geared motor 31 is used to drive the fixed pipe 22 to rotate. Since the inner wall of the fixed pipe 22 and the outer wall of the support pipe 21 are a matching polygonal structure, the support pipe 21 will rotate with the fixed pipe 22. In addition, since the fixed pipe 22 and the support pipe 21 are connected by a push rod device 25, when the push rod device 25 extends, it can lift the support pipe 21 upward, thereby raising the transverse arm 40 and the first gas collection hood 50 so that the operators can work on the top of the turbine generator rotor 1.

[0040] In this embodiment, both the driving wheel 32 and the driven wheel 33 can be gears, meshing with each other; both the driving wheel 32 and the driven wheel 33 can also be pulleys, connected by a belt for transmission. The push rod device 25 can be an electric push rod. The electric push rod is electrically connected to the control power supply via an aviation connector. When adjustment is required, the aviation connector is engaged; when the first gas collecting hood 50 needs to rotate, the aviation connector is disengaged to prevent the electric push rod cable from affecting the rotation of the first gas collecting hood 50.

[0041] Example 5: Based on Example 1, see Figure 1 , 3 The end of the transverse arm 40 furthest from the support unit 20 is connected to and supports two first ring bodies 60. Multiple first gas collection hoods 50 are mounted on the upper side of the two first ring bodies 60. (See [reference]). Figure 5Each of the first air collecting hoods 50 has a connecting pipe 52 on both sides. The connecting pipes 52 between adjacent first air collecting hoods 50 are connected by a connecting pipe 57. A perforated plate 58 is installed at the bottom of the first air collecting hood 50. The first air intake port 51 that is not connected to the second air intake pipe 93 is sealed with a cap 511. Through the above structure, multiple first air collecting hoods 50 are connected in series. The perforated plate 58 at the bottom of the first air collecting hood 50 controls the air intake of each first air collecting hood 50 through the holes on the perforated plate 58, so that all the first air collecting hoods 50 have suction. Since the number of second air intake pipes 93 is less than the number of first air collecting hoods 50, the first air intake port 51 that is not connected to the second air intake pipe 93 must be sealed with a cap 511. The cap 511 is a plastic part and is fitted onto the first air intake port 51.

[0042] In this embodiment, the two first ring bodies 60 can be welded to the transverse arm 40 or installed on the transverse arm 40 by bolts.

[0043] Further, see Figure 6 Connecting seats 56 are installed at the four corners of the lower side of the first gas collecting hood 50. Each connecting seat 56 includes a fixed block 561 and a movable block 562. The fixed block 561 is welded to the lower side of the first gas collecting hood 50. A groove for clamping the first ring body 60 is provided between the fixed block 561 and the movable block 562. The movable block 562 is installed on the fixed block 561 by screws to clamp the first ring body 60 in the connecting seat 56. With the above structure, the first gas collecting hood 50 can be installed and fixed onto the two first ring bodies 60.

[0044] Example 6: Based on Example 5, see Figure 1 Two second ring bodies 70 are connected and supported in the middle of the transverse arm 40. Multiple second gas collecting hoods 80 are installed on the upper side of the two second ring bodies 70. The second gas collecting hoods 80 have the same structure as the first gas collecting hood 50. Adjacent second gas collecting hoods 80 are connected by connecting pipes 57. A four-way connector 95 is connected to the second suction pipe 93. Two opposite ports of the four-way connector 95 are connected to the second suction pipe 93, and the other two opposite ports are connected to the connecting pipes 57 on both sides. By installing two second ring bodies 70 in the middle of the transverse arm 40, multiple second gas collecting hoods 80 are installed on the upper side of the two second ring bodies 70 to collect the volatile gases during cleaning of the inner circumference of the turbine generator rotor 1.

[0045] See Figure 5The second gas collecting hood 80 has the same structure as the first gas collecting hood 50. The second gas collecting hood 80 also has a first air intake port 51 and a connecting port 52. The first air intake port 51 of each second gas collecting hood 80 is sealed by a cap 511, and the connecting ports 52 of adjacent second gas collecting hoods 80 are connected by a connecting pipe 57. To connect the second air intake pipe 93 to the second gas collecting hood 80, a four-way connector 95 is connected to the second air intake pipe 93. Two opposite ports of the four-way connector 95 are connected in series with the second air intake pipe 93, and the other two opposite ports are connected to the connecting pipes 57 on both sides.

[0046] Example 7: Based on Example 5, see Figure 5 The first gas collection hood 50 is also provided with an auxiliary air intake 53 on the side opposite to the first air intake 51. The auxiliary air intake 53 is used to connect to the air intake cylinder 55 through a hose 54, so as to collect welding fumes on the ground. When the auxiliary air intake 53 is not connected to the air intake cylinder 55, a plug cap 511 is installed on the auxiliary air intake 53 to seal it.

[0047] The working principle or process of this utility model: See Figure 7 When the turbine generator rotor 1 is lifted out for maintenance, a fixing seat 10 is installed at the center hole on the top of the turbine generator rotor 1. The fixing seat 10 is fixed to the center hole of the turbine generator rotor 1 by bolts through the mounting hole 121 on the base plate 12.

[0048] When the device cannot rotate, the end of the horizontal arm 40 away from the support unit 20 is connected to support two first ring bodies 60. Multiple first gas collection hoods 50 are installed on the upper side of the two first ring bodies 60. The exhaust fan 91 is used to extract the air in the first gas collection hoods 50, thereby collecting the gas volatilized by the cleaning agent and the welding gas through the first gas collection hoods 50.

[0049] When the device can rotate, the number of first gas collection hoods 50 can be reduced. When performing local cleaning on the turbine generator rotor 1, the first gas collection hoods 50 can be rotated so that the first gas collection hoods 50 are located above the local cleaning area.

[0050] When in use, the exhaust pipe 94 is connected to the air outlet end of the exhaust fan 91, and the exhaust pipe 94 extends to connect with the flue gas centralized treatment device 100 in the factory area.

[0051] 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 gas collection device for use during the overhaul of a hydro-generator rotor, characterized in that: The device includes a fixed base (10), a support unit (20), transverse arms (40), a first gas collection hood (50), and a collection unit (90). The support unit (20) is longitudinally mounted on the fixed base (10). Multiple transverse arms (40) are arranged radially. One end of each transverse arm (40) is fixed to the upper end of the support unit (20), and the other end is fitted with the first gas collection hood (50). The support unit (20) has a longitudinal air duct (24) inside, with the upper end of the air duct (24) closed. The upper end of the support unit (20) is located at the corresponding transverse arm (40). A collection interface (212) is provided at the location, and the collection interface (212) is connected to the air duct (24). The collection unit (90) includes a fan (91), a first suction pipe (92) and a second suction pipe (93). One end of the first suction pipe (92) is connected to the lower end of the support unit (20) located in the air duct (24), and the other end is connected to the air inlet of the fan (91). One end of the second suction pipe (93) is connected to the collection interface (212), and the other end is connected to the first air inlet (51) of the first air collection hood (50).

2. The gas collection device for overhauling a hydro-generator rotor according to claim 1, characterized in that: The fixed base (10) includes a boss (11) and a base plate (12). The base plate (12) is fixed to the lower end of the boss (11). The base plate (12) is provided with mounting holes (121). The support unit (20) includes a support tube (21). The support tube (21) passes through the boss (11) longitudinally. The support tube (21) is connected to the boss (11). The top of the support tube (21) is closed. The air duct (24) is formed inside the support tube (21). The collection interface (212) is fixed to the upper end of the support tube (21). The first suction pipe (92) is connected to the lower end of the support tube (21).

3. A gas collection device for overhauling a hydro-generator rotor according to claim 2, characterized in that: The support tube (21) is rotatably connected to the center hole of the boss (11), and a rotary joint (23) is installed at the lower end of the support tube (21). The first suction tube (92) is connected to the rotary joint (23).

4. A gas collection device for overhauling a hydro-generator rotor according to claim 3, characterized in that: The rotary joint (23) includes a first pipe section (231) and a second pipe section (232). The upper inner wall of the first pipe section (231) is provided with an internal thread, and the lower outer wall of the support pipe (21) is provided with an external thread. The upper end of the first pipe section (231) is screwed to the lower end of the support pipe (21). Two positioning bearings (233) are fixedly installed on the lower outer wall of the first pipe section (231). The upper end of the second pipe section (232) is fitted onto the outer ring of the two positioning bearings (233). The lower end of the second pipe section (232) is connected to the first suction pipe (92). A spacer (234) is installed between the two positioning bearings (233). A sealing groove is provided in the middle of the outer wall of the spacer (234). A sealing ring (235) is installed in the sealing groove. The outer circumference of the sealing ring (235) is in elastic contact with the inner wall of the second pipe section (232).

5. A gas collection device for overhauling a hydro-generator rotor according to claim 3, characterized in that: It also includes a rotary drive unit (30) for driving the support tube (21) to rotate.

6. A gas collection device for overhauling a hydro-generator rotor according to claim 5, characterized in that: The rotary drive unit (30) includes a geared motor (31), a drive wheel (32), and a driven wheel (33). The geared motor (31) is mounted on the boss (11). The drive wheel (32) is mounted on the output shaft of the geared motor (31). The driven wheel (33) is fixedly mounted on the support tube (21). The drive wheel (32) and the driven wheel (33) are connected in a transmission to drive the support tube (21) to rotate.

7. A gas collection device for overhauling a hydro-generator rotor according to claim 5, characterized in that: The support unit (20) also includes a fixed tube (22), which is slidably fitted on the outside of the support tube (21). The inner wall of the fixed tube (22) and the outer wall of the support tube (21) are fitted polygonal structures. The fixed tube (22) is rotatably connected to the center hole of the boss (11). The rotary drive unit (30) includes a geared motor (31), a drive wheel (32), and a driven wheel (33). The geared motor (31) is mounted on the boss (11). The drive wheel (32) is mounted on the output shaft of the geared motor (31). The driven wheel (33) is fixedly mounted on the fixed tube (22). The drive wheel (32) and the driven wheel (33) are connected in a transmission manner. The outer wall of the support tube (21) is fixedly mounted on the upper side of the fixed tube (22). The outer wall of the fixed tube (22) is fixedly mounted on the second ear (221). A push rod device (25) is installed between the first ear (211) and the second ear (221).

8. A gas collection device for overhauling a hydro-generator rotor according to claim 1, characterized in that: The end of the transverse arm (40) away from the support unit (20) is connected to support two first ring bodies (60). Multiple first gas collection hoods (50) are installed on the upper side of the two first ring bodies (60). Connecting pipe ports (52) are also provided on both sides of the first gas collection hoods (50). The connecting pipe ports (52) between adjacent first gas collection hoods (50) are connected by connecting pipes (57). A perforated plate (58) is installed at the bottom of the first gas collection hood (50). The first air intake port (51) that is not connected to the second air intake pipe (93) is closed by a plug cap (511). Connecting seats (56) are installed at the four corners of the lower side of the first gas collecting hood (50). The connecting seats (56) include a fixed block (561) and a movable block (562). The fixed block (561) is fixed to the lower side of the first gas collecting hood (50). A groove for clamping the first ring body (60) is provided between the fixed block (561) and the movable block (562). The movable block (562) is installed on the fixed block (561) by screws to clamp the first ring body (60) in the connecting seat (56).

9. A gas collection device for overhauling a hydro-generator rotor according to claim 8, characterized in that: The middle part of the transverse arm (40) is connected to support two second ring bodies (70). Multiple second gas collection hoods (80) are installed on the upper side of the two second ring bodies (70). The second gas collection hoods (80) have the same structure as the first gas collection hood (50). Adjacent second gas collection hoods (80) are connected by connecting pipes (57). A four-way connector (95) is connected to the second suction pipe (93). Two of the opposite ports of the four-way connector (95) are connected to the second suction pipe (93), and the other two opposite ports are connected to the connecting pipes (57) on both sides respectively.

10. A gas collection device for overhauling a hydro-generator rotor according to claim 8, characterized in that: The first gas collection hood (50) is also provided with an auxiliary air intake (53) on the side opposite to the first air intake port (51). The auxiliary air intake (53) is used to connect with the air intake cylinder (55) through a hose (54).

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