Shielding main pump shell sealing ring back gouging device and method

Abstract

The invention discloses a shielding main pump shell sealing ring back gouging device and method, and belongs to the field of main pump maintenance. The pump shell sealing ring back gouging device of the shielding main pump comprises a pump shell flange face, a C-shaped sealing ring is arranged above the pump shell flange face, a pump body main flange is fixedly connected to the surface of the pump shell flange face, and the pump shell sealing ring back gouging device of the shielding main pump further comprises an annular installation base which is arranged over the pump shell flange face, the bottom of the annular mounting seat is rotationally connected with a back gouging mechanism through a driving part, the bottom of the back gouging mechanism is rotationally connected with a shielding plate through a bearing, and the shielding plate is located over the flange face of the pump shell; the sealing ring back gouging device can be installed and fixed according to pump shells with different sizes, the problem that the pump shells with different sizes cannot be installed is solved, back gouging work can be continuously conducted on a sealing ring, the problem that the feeding amount of a turning tool needs to be adjusted again is solved, and the back gouging efficiency of the sealing ring is further improved.

Description

Technical Field

[0001] The invention relates to the technical field of main pump maintenance, and in particular to a device for cleaning the root of a shielded main pump casing seal ring. Background Art

[0002] The shielded main pump of a nuclear power plant is used to transport high-pressure, high-temperature, high-radiation, and large-flow reactor coolant. To prevent coolant leakage, a C-type sealing ring is provided between the pump casing and the stator flange end ring of the shielded main pump. The shielded main pump of a nuclear power plant serves in extreme working conditions for a long time, and its inspection and maintenance during operation are indispensable. When inspecting the inside of the shielded main pump, the surface of the stator flange end ring needs to be turned after removing the pump casing to remove the remaining C-type sealing ring.

[0003] For example, in the prior art, Chinese Patent Publication No. CN111438374A, filed on April 15, 2020, is titled "A Shielded Main Pump Casing C-Type Sealing Ring Root Cleaning Device." The device comprises a boom, a main shaft rotating ring, and a shielding plate; the main shaft rotating ring is disposed between the shielding plate and the boom; the main shaft rotating ring is rotatably connected to the boom, and the main shaft rotating ring is rotatably connected to the shielding plate; and a turning tool is disposed on the main shaft rotating ring. In the prior art, the shielding device, the lifting device, and the cutting device are independent of one another. When the three are required to work together, the shielding device must be connected to the lifting device via a connecting structure. This connecting structure interferes with the rotation of the cutting device, thereby affecting construction efficiency. Compared to the prior art, the present invention connects the shielding plate, turning tool, and boom into a unified whole via the main shaft rotating ring. This eliminates the need for additional connecting structures between the boom and the shielding plate, leaving ample space for the turning tool to rotate, thereby improving construction efficiency.

[0004] However, the above patent still has the disadvantage that, when installing on the surface of the pump casing flange, since the sizes of the pump casing flanges are different, the different pump casing sizes may easily cause installation problems, further reducing the applicability of the root cleaning device. Summary of the Invention

[0005] The purpose of the present invention is to solve the above problems in the prior art and to propose a root cleaning device for the pump casing sealing ring of a shielded main pump.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A shielding main pump pump casing sealing ring root cleaning device, comprising a pump casing flange surface, a C-type sealing ring is arranged above the pump casing flange surface, the surface of the pump casing flange surface is fixedly connected to the pump body main flange, and further comprising: an annular mounting seat, arranged directly above the pump casing flange surface, the bottom of the annular mounting seat is rotatably connected to a root cleaning mechanism through a driving portion, the bottom of the root cleaning mechanism is rotatably connected to a shielding plate through a bearing, the shielding plate is located directly above the pump casing flange surface, and the root cleaning mechanism is used to cut the surface of the C-type sealing ring; a mounting mechanism, arranged inside the annular mounting seat, wherein the mounting mechanism includes an adjusting arm sliding inside the annular mounting seat, an adjustable mounting head is provided at the end of the adjusting arm, the mounting head is used to be mounted on the surface of the pump casing flange surface, the top of the annular mounting seat is rotatably connected to a rotating disk through a driving portion, the surface of the rotating disk is provided with arc grooves at equal distances, a positioning rod is slidably connected inside the arc groove, and the positioning rod is fixedly connected to the top of the adjusting arm.

[0008] Preferably, the root cleaning mechanism includes an annular mounting seat whose bottom is rotatably connected to a rotating shaft through a driving portion, a telescopic plate is fixedly connected to the surface of the rotating shaft, the bottom of the rotating shaft is rotatably connected to a shielding plate through a bearing, the end of the telescopic plate is fixedly connected to an L-support plate through a driving portion, a turning tool is mounted on the surface of the L-support plate, and the side wall of the telescopic plate is fixedly connected to a cylinder.

[0009] Preferably, the other end of the telescopic plate is fixedly connected to a vacuum cleaner, the surface of the vacuum cleaner is connected to a corrugated hose, the end of the corrugated hose is connected to a dust hood, and the dust hood is fixedly connected to the side wall of the L support plate.

[0010] Preferably, the root cleaning mechanism further comprises an inner gear ring fixed to the bottom of the annular mounting seat, and the inner portion of the inner gear ring is engaged with the vacuum cleaner to rotatably connect the vacuum cleaner.

[0011] Preferably, the vacuum cleaner includes a dust box fixed at the end of the telescopic plate, the top of the dust box is rotatably connected to a rotating shaft through a bearing, the two ends of the rotating shaft are respectively fixedly connected to fan blades and a driven gear, the fan blades are located inside the dust box, and the driven gear is engaged with the inside of the inner gear ring.

[0012] Preferably, a filter is fixedly connected to the interior of the dust collection box, and the filter is located directly below the fan blades.

[0013] Preferably, a plurality of exhaust holes are provided on the top of the dust collection box, and a plurality of the exhaust holes are located directly above the fan blades.

[0014] Preferably, the mounting head includes a threaded rod threadedly connected to the inside of the adjusting arm, the end of the threaded rod is rotatably connected to a lifting block through a bearing, and the end of the lifting block is fixedly connected to a pressing block.

[0015] Preferably, the surface of the lifting block is connected to a threaded rod 2 via a thread, and the end of the threaded rod 2 is rotatably connected to the extrusion block via a bearing.

[0016] A method for detecting a root cleaning device for a shielded main pump casing sealing ring mainly comprises the following steps:

[0017] S1. Positioning: First, lift the annular mounting seat and place it directly above the pump casing flange surface. Then, with the bottom cleaning mechanism and shielding plate at the bottom of the annular mounting seat set, place the shielding plate directly above the pump casing flange surface for shielding protection. At the same time, place the cleaning mechanism directly above the main flange of the pump body for tool alignment.

[0018] S2. Installation: After the position is accurately positioned, adjust the required length through the adjusting arm inside the annular mounting seat, so that the mounting head at the end of the adjusting arm is located on the surface of the pump casing flange surface, and then use the mounting head to install and fix it on the side of the pump casing flange surface, so as to fix the mounting mechanism around the pump casing flange surface for installation. When the driving part on the top of the rotating disk rotates, the arc groove can be synchronously driven to deflect the angle, and the positioning rod can be adjusted under the deflection of the arc groove angle, and the adjusting arm can be synchronously driven to move under the adjustment of the positioning rod;

[0019] S3. Processing: The top driving part of the rotating shaft is used to drive the telescopic plate to rotate. When the telescopic plate rotates, the turning tool fixed on the L support plate is driven to rotate synchronously. When the turning tool rotates, the side wall of the C-type sealing ring can be cut. At the same time, the cylinder drives the L support plate and the turning tool to feed. After the turning tool cuts a circle on the surface of the C-type sealing ring, it feeds another cutting amount. Then repeat this operation until the C-type sealing ring is cut and eradicated.

[0020] Compared with the prior art, the present invention provides a device for cleaning the seal ring of a shielded main pump casing, which has the following beneficial effects:

[0021] 1. The shielded main pump casing sealing ring root cleaning device can be adjusted when installed with the pump casing through the cooperation between the adjusting arm, the mounting head, the arc groove of the rotating disk and the positioning rod. Through this setting, it can be installed and fixed according to pump casings of different sizes, avoiding the problem of being unable to install due to different pump casing sizes, and further improving the applicability of the root cleaning device.

[0022] 2. The shielded main pump casing sealing ring root cleaning device, through the cooperation between the rotating shaft, telescopic plate, L support plate and turning tool, enables it to slowly feed during the cutting process of the sealing ring. Through this setting, the sealing ring can be continuously cleaned, avoiding the need to readjust the turning tool feed amount, and further improving the sealing ring root cleaning efficiency.

[0023] 3. The shielded main pump casing sealing ring root cleaning device processes the waste chips generated when cutting the surface of the pump body main flange through the cooperation between the vacuum cleaner, the inner gear ring, the corrugated hose, and the dust cover. Through this setting, the waste chips can be processed in time to prevent the existence of waste chips from affecting the quality of the subsequent root cleaning, and further improve the operability of the sealing ring root cleaning.

[0024] The parts not involved in the device are the same as the existing technology or can be implemented by using the existing technology. The present invention can be installed and fixed according to pump casings of different sizes, avoiding the problem of being unable to install due to different pump casing sizes, and can continuously clean the root of the sealing ring, avoiding the need to readjust the feed rate of the turning tool, thereby further improving the cleaning efficiency of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 This is a structural schematic diagram of a shielded main pump casing sealing ring root cleaning device proposed by the present invention;

[0026] Figure 2 This is a schematic diagram of the top view of the structure of a shielded main pump casing sealing ring root cleaning device proposed by the present invention;

[0027] Figure 3 This is a schematic diagram of the AA cross-section structure of a shielded main pump casing sealing ring root cleaning device proposed by the present invention;

[0028] Figure 4 Schematic diagram of the root cleaning mechanism of the shielded main pump casing sealing ring root cleaning device proposed by the present invention Figure 1 ;

[0029] Figure 5 The present invention proposes a shielding main pump casing sealing ring cleaning device Figure 4 Enlarged structure diagram at A in the middle Figure 1 ;

[0030] Figure 6 Schematic diagram of the root cleaning mechanism of the shielded main pump casing sealing ring root cleaning device proposed by the present invention Figure 2 ;

[0031] Figure 7 This is a schematic structural diagram of the installation head of a shielded main pump casing sealing ring root cleaning device proposed by the present invention;

[0032] Figure 8 This is a schematic diagram of the left side structure of a shielded main pump casing sealing ring root cleaning device proposed by the present invention.

[0033] In the figure: 1. Pump casing flange surface; 2. C-type sealing ring; 3. Pump body main flange; 4. Annular mounting seat; 5. Mounting mechanism; 51. Adjusting arm; 52. Mounting head; 521. Threaded rod shift; 522. Lifting block; 523. Pressing block; 524. Threaded rod II; 53. Rotating disk; 54. Arc groove; 55. Positioning rod; 6. Root cleaning mechanism; 61. Rotating shaft; 62. Telescopic plate; 621. Cylinder; 63. L support plate; 64. Turning tool; 65. Vacuum cleaner; 651. Dust box; 652. Rotating shaft; 653. Fan blade; 654. Driven gear; 655. Filter; 656. Exhaust hole; 66. Inner ring gear; 67. Corrugated hose; 68. Dust hood; 7. Shielding plate. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0035] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0036] In one embodiment, reference Figures 1-8 A shielded main pump casing sealing ring root cleaning device includes a pump casing flange surface 1, a C-type sealing ring 2 is arranged above the pump casing flange surface 1, and the surface of the pump casing flange surface 1 is fixedly connected to the pump body main flange 3, and also includes: an annular mounting seat 4, which is arranged just above the pump casing flange surface 1, and the bottom of the annular mounting seat 4 is rotatably connected to a root cleaning mechanism 6 through a driving part, and the bottom of the root cleaning mechanism 6 is rotatably connected to a shielding plate 7 through a bearing, and the shielding plate 7 is located just above the pump casing flange surface 1. The root cleaning mechanism 6 is used to clean the surface of the C-type sealing ring 2. The mounting mechanism 5 is provided inside the annular mounting seat 4, wherein the mounting mechanism 5 includes an adjusting arm 51 sliding inside the annular mounting seat 4, and an adjustable mounting head 52 is provided at the end of the adjusting arm 51. The mounting head 52 is used to be mounted on the surface of the pump casing flange surface 1. The top of the annular mounting seat 4 is rotatably connected to a rotating disk 53 through a driving portion. The surface of the rotating disk 53 is provided with arc grooves 54 at equal distances. The interior of the arc groove 54 is slidably connected to a positioning rod 55, and the positioning rod 55 is fixedly connected to the top of the adjusting arm 51.

[0037] By adopting such a scheme, the length can be adjusted by setting the adjusting arm 51 included in the mounting mechanism 5, thereby driving the mounting head 52 to move away from or close to the surface of the pump casing flange surface 1, and then fixed to the surface of the pump casing flange surface 1 by the mounting head 52, so as to install the annular mounting seat 4 on the surface of the pump casing flange surface 1, and at the same time ensure the consistency of concentricity. When the top driving part of the rotating disk 53 rotates, the multiple arc grooves 54 inside the rotating disk 53 can be synchronously driven to rotate, and the rotation of the multiple arc grooves 54 drives the multiple positioning rods 55. Since the positioning rod 55 is fixed above the adjusting arm 51, the multiple adjusting arms 51 are synchronously driven to be adjusted.

[0038] In addition, the driving part at the top of the rotating disk 53 is a servo motor.

[0039] During the specific work, the annular mounting seat 4 is first lifted and positioned directly above the pump casing flange surface 1. Then, through the setting of the root cleaning mechanism 6 and the shielding plate 7 at the bottom of the annular mounting seat 4, the shielding plate 7 is positioned directly above the pump casing flange surface 1 for shielding protection. At the same time, the root cleaning mechanism 6 is positioned directly above the main flange 3 of the pump body for tool alignment. When the position is accurately positioned, the required length is adjusted through the adjusting arm 51 inside the annular mounting seat 4, so that the mounting head 52 at the end of the adjusting arm 51 is located on the surface of the pump casing flange surface 1. Then, the mounting head 52 is used to install and fix it to the side of the pump casing flange surface 1, so that the mounting mechanism 5 is fixed around the pump casing flange surface 1 for installation. By rotating the top driving part of the rotating disk 53, the arc groove 54 can be synchronously driven to perform angular displacement. Under the angular displacement of the arc groove 54, the positioning rod 55 is driven to adjust. Under the adjustment of the positioning rod 55, the adjusting arm 51 can be synchronously driven to be displaced, so that it can be suitable for different sizes of pump casing flange surfaces 1.

[0040] In one embodiment, reference Figures 1-8 The root cleaning mechanism 6 includes an annular mounting seat 4, the bottom of which is rotatably connected to a rotating shaft 61 through a driving portion, a telescopic plate 62 is fixedly connected to the surface of the rotating shaft 61, the bottom of the rotating shaft 61 is rotatably connected to the shielding plate 7 through a bearing, the end of the telescopic plate 62 is fixedly connected to an L support plate 63 through a driving portion, a turning tool 64 is installed on the surface of the L support plate 63, a cylinder 621 is fixedly connected to the side wall of the telescopic plate 62, and a vacuum cleaner 65 is fixedly connected to the other end of the telescopic plate 62. The surface of the vacuum cleaner 65 is connected to a corrugated hose 67, and the end of the corrugated hose 67 is connected to a dust hood 68, which is fixedly connected to the side wall of the L support plate 63.

[0041] By adopting such a solution, different lengths can be adjusted by setting the telescopic plate 62 at the end of the rotating shaft 61, so that it can be adjusted to suit C-type sealing rings 2 of different sizes, thereby completing the cutting and removal work of the C-type sealing ring 2.

[0042] During specific operation, the rotating shaft 61 is used to support the telescopic plate 62, and then the telescopic plate 62 is used to support the L support plate 63, and finally the L support plate 63 is used to install the turning tool 64. By adjusting the telescopic plate 62, the L support plate 63 can drive the turning tool 64 close to the outermost side of the C-shaped sealing ring 2, and then the top driving part of the rotating shaft 61 is operated, thereby driving the rotating shaft 61, the telescopic plate 62, the L support plate 63 and the turning tool 64 to rotate synchronously in turn. When the turning tool 64 rotates, the C The surface of the C-type sealing ring 2 is cut. Driven by the cylinder 621, after the turning tool 64 rotates one circle, the L-support plate 63 can be used to drive the turning tool 64 to feed a cutting amount, so that the turning tool 64 continues to cut and eradicate the C-type sealing ring 2. Then, the operation is repeated in this way until the C-type sealing ring 2 is cut and eradicated. The root cleaning mechanism 6 also includes an inner gear ring 66 fixed to the bottom of the annular mounting seat 4. The internal meshing connection of the inner gear ring 66 is used to rotate the vacuum cleaner 65.

[0043] In addition, the driving part connected to the top of the rotating shaft 61 is a servo motor, and the driving part between the top of the telescopic plate 62 and the L support plate 63 is an electric push rod.

[0044] In one embodiment, reference Figures 1-8 The vacuum cleaner 65 includes a dust box 651 fixed to the end of the telescopic plate 62. The top of the dust box 651 is rotatably connected to a rotating shaft 652 through a bearing. The two ends of the rotating shaft 652 are respectively fixedly connected to fan blades 653 and driven gears 654. The fan blades 653 are located inside the dust box 651. The driven gear 654 is engaged with the inside of the inner ring gear 66. The inside of the dust box 651 is fixedly connected to a filter screen 655, and the filter screen 655 is located directly below the fan blades 653. A number of exhaust holes 656 are opened on the top of the dust box 651, and the number of exhaust holes 656 are located directly above the fan blades 653.

[0045] With such a solution, at the end of the vacuum cleaner 65 fixed to the telescopic plate 62, the telescopic plate 62 rotates, and the dust box 651 and the rotating shaft 652 are synchronously driven to rotate. Since the driven gear 654 at the top of the rotating shaft 652 is engaged with the inside of the inner ring 66, the inner ring 66 does not move while the driven gear 654 rotates along the inside of the inner ring 66, thereby automatically driving the rotating shaft 652 to rotate.

[0046] During specific operation, the dust box 651 is fixed to the end of the telescopic plate 62, and then the rotating shaft 652 rotates through the bearing at the top of the dust box 651. When the telescopic plate 62 rotates, the dust box 651 can be driven to rotate synchronously, and the driven gear 654 at the top of the rotating shaft 652 will rotate along the inside of the inner ring gear 66, thereby driving the rotating shaft 652 at the bottom of the driven gear 654 to rotate. Under the rotation of the rotating shaft 652, the fan blades 653 are driven. Driven by the fan blades 653, an adsorption force can be generated inside the dust box 651 and the corrugated hose 67, thereby adsorbing the waste debris generated by the sealing ring. Under the setting of the filter 655, the waste debris and gas adsorbed by the dust box 651 can be filtered, and the gas is discharged through the filter 655, and the waste debris will remain in the dust box 651 for storage. Through the setting of the exhaust hole 656, the gas in the dust box 651 is discharged to the outside.

[0047] In one embodiment, reference Figures 1-8 The mounting head 52 includes a threaded rod 521 threadedly connected to the inside of the adjusting arm 51, the end of the threaded rod 521 is rotatably connected to the lifting block 522 through a bearing, the end of the lifting block 522 is fixedly connected to the clamping block 523, the surface of the lifting block 522 is threadedly connected to a threaded rod 524, and the end of the threaded rod 524 is rotatably connected to the extrusion block through a bearing.

[0048] By adopting such a solution, the rotation of the threaded rod 521 can drive the lifting block 522 and the clamping block 523 to move downward synchronously, so as to align the parallelism of the clamping block 523 with the top of the pump body main flange 3, and then the concentricity between the pump casing flange surface 1 and the annular mounting seat 4 can be adjusted by adjusting the threaded rod 524.

[0049] During specific work, the threaded rod 521 is rotated by a wrench to drive the threaded rod 521 and the clamping block 523 to adjust up and down, so as to adjust the parallelism of the clamping block 523 and the top of the pump body main flange 3. When adjusting the required flatness, the threaded rod 2 524 on the surface of the lifting block 522 is rotated. Under the rotation of the threaded rod 2 524, the extrusion block can be driven to move, so as to tighten the extrusion block to the surface of the pump casing flange surface 1. In the same way, the other multiple groups of threaded rod 2 524 are operated synchronously, and the parallelism and concentricity between the pump casing flange surface 1 and the annular mounting seat 4 are tested using a dial indicator. When the parallelism and concentricity are unqualified, fine adjustments can be made until the parallelism and concentricity of the pump casing flange surface 1 and the annular mounting seat 4 are adjusted to be consistent.

[0050] The above description is only a preferred specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with the technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solution and inventive concept of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. A shielded main pump casing sealing ring root cleaning device, comprising a pump casing flange surface (1), a C-shaped sealing ring (2) is arranged above the pump casing flange surface (1), and a pump body main flange (3) is fixedly connected to the surface of the pump casing flange surface (1), characterized in that: Also includes: An annular mounting seat (4) is arranged just above the flange surface (1) of the pump casing. The bottom of the annular mounting seat (4) is rotatably connected to a root cleaning mechanism (6) via a driving portion. The bottom of the root cleaning mechanism (6) is rotatably connected to a shielding plate (7) via a bearing. The shielding plate (7) is located just above the flange surface (1) of the pump casing. The root cleaning mechanism (6) is used to perform a cutting process on the surface of the C-type sealing ring (2). The mounting mechanism (5) is arranged inside the annular mounting seat (4), wherein the mounting mechanism (5) includes an adjusting arm (51) sliding inside the annular mounting seat (4), an adjustable mounting head (52) is provided at the end of the adjusting arm (51), and the mounting head (52) is used to be mounted on the surface of the pump casing flange surface (1), the top of the annular mounting seat (4) is rotatably connected to a rotating disk (53) through a driving part, the surface of the rotating disk (53) is provided with arc grooves (54) at equal intervals, and a positioning rod (55) is slidably connected inside the arc groove (54), and the positioning rod (55) is fixedly connected to the top of the adjusting arm (51).

2. A shielded main pump casing sealing ring root cleaning device according to claim 1, characterized in that: The root cleaning mechanism (6) comprises an annular mounting seat (4) whose bottom is rotatably connected to a rotating shaft (61) via a driving unit, a telescopic plate (62) fixedly connected to the surface of the rotating shaft (61), the bottom of the rotating shaft (61) being rotatably connected to a shielding plate (7) via a bearing, an end of the telescopic plate (62) being fixedly connected to an L-shaped support plate (63) via a driving unit, a turning tool (64) being mounted on the surface of the L-shaped support plate (63), and a side wall of the telescopic plate (62) being fixedly connected to a cylinder (621).

3. A shielded main pump casing seal ring root cleaning device according to claim 2, characterized in that: The other end of the telescopic plate (62) is fixedly connected to a dust collector (65), the surface of the dust collector (65) is connected to a corrugated hose (67), the end of the corrugated hose (67) is connected to a dust hood (68), and the dust hood (68) is fixedly connected to the side wall of the L support plate (63).

4. A shielded main pump casing seal ring root cleaning device according to claim 3, characterized in that: The root cleaning mechanism (6) further comprises an inner gear ring (66) fixed to the bottom of the annular mounting seat (4); the inner portion of the inner gear ring (66) is engaged with the dust collector (65) for rotationally connecting the dust collector (65).

5. A shielded main pump casing seal ring root cleaning device according to claim 4, characterized in that: The vacuum cleaner (65) comprises a dust box (651) fixed to the end of the telescopic plate (62); the top of the dust box (651) is rotatably connected to a rotating shaft (652) via a bearing; the two ends of the rotating shaft (652) are respectively fixedly connected to a fan blade (653) and a driven gear (654); the fan blade (653) is located inside the dust box (651); and the driven gear (654) is meshed with the inside of the inner gear ring (66).

6. A shielded main pump casing seal ring root cleaning device according to claim 5, characterized in that: A filter (655) is fixedly connected to the interior of the dust collection box (651), and the filter (655) is located directly below the fan blade (653).

7. A shielded main pump casing seal ring root cleaning device according to claim 5, characterized in that: A plurality of exhaust holes (656) are provided on the top of the dust collection box (651), and the plurality of exhaust holes (656) are located directly above the fan blades (653).

8. The device for cleaning the seal ring of a shielded main pump casing according to claim 1, characterized in that: The mounting head (52) comprises a threaded rod (521) threadedly connected to the inside of the adjusting arm (51); the end of the threaded rod (521) is rotatably connected to a lifting block (522) via a bearing; and the end of the lifting block (522) is fixedly connected to a pressing block (523).

9. A shielded main pump casing seal ring root cleaning device according to claim 8, characterized in that: The surface of the lifting block (522) is connected to a second threaded rod (524) via a threaded connection, and the end of the second threaded rod (524) is rotatably connected to an extrusion block via a bearing.

10. A method for shielding a main pump casing seal ring root cleaning device, comprising the shielding main pump casing seal ring root cleaning device according to claim 7, characterized in that: The main steps include: S1. Positioning: First, the annular mounting seat (4) is lifted and positioned directly above the pump casing flange surface (1). Then, through the arrangement of the bottom cleaning mechanism (6) and the shielding plate (7) of the annular mounting seat (4), the shielding plate (7) is positioned directly above the pump casing flange surface (1) for shielding protection. At the same time, the cleaning mechanism (6) is positioned directly above the main flange (3) of the pump body for tool alignment. S2. Installation: After the position is accurately positioned, the required length is adjusted through the adjusting arm (51) inside the annular mounting seat (4), so that the mounting head (52) at the end of the adjusting arm (51) is located on the surface of the pump casing flange surface (1), and then the mounting head (52) is used to install and fix it on the side of the pump casing flange surface (1), so as to fix the mounting mechanism (5) around the pump casing flange surface (1) for installation. When the top driving part of the rotating disk (53) rotates, the arc groove (54) can be synchronously driven to perform angular deviation. When the arc groove (54) is angularly deviated, the positioning rod (55) is driven to perform adjustment. When the positioning rod (55) is adjusted, the adjusting arm (51) can be synchronously driven to perform displacement. S3, processing: The top driving part of the rotating shaft (61) is operated to drive the telescopic plate (62) to rotate. When the telescopic plate (62) rotates, the turning tool (64) fixed to the L support plate (63) is driven to rotate synchronously. When the turning tool (64) rotates, the side wall of the C-type sealing ring (2) can be cut. At the same time, the L support plate (63) and the turning tool (64) can be driven to feed. After the turning tool (64) cuts a circle on the surface of the C-type sealing ring (2), it feeds a cutting amount again. Then, this operation is repeated until the C-type sealing ring (2) is cut and eradicated.

Images