Supporting device, nuclear power station penetration piece sleeve polishing and paint spraying device and method thereof

Abstract

The invention discloses a supporting device, a nuclear power station penetration piece sleeve polishing and paint spraying device and a method thereof. The supporting device comprises a lantern ring unit, a driving unit and a mounting base. The lantern ring unit is used for being arranged on the periphery of a central pipeline of the nuclear power station penetration piece in a sleeving mode. And the mounting seat is connected with the lantern ring unit, can rotate relative to the central pipeline and is used for mounting a polishing device or a paint spraying device. The lantern ring unit supports the grinding device and the paint spraying device and can drive the grinding device and the paint spraying device to enter the penetrating piece (especially the penetrating piece with the small pipe diameter). The mounting seat is connected with the inner ring, and torque output by the driving motor is sequentially transmitted to the gear and the gear ring on the periphery of the inner ring, so that the inner ring and the mounting seat are driven to rotate around the central axis of the central pipeline, and the polishing device is driven to polish the inner wall face of the sleeve in the circumferential direction or the paint spraying device is driven to spray paint to the inner wall face of the sleeve in the circumferential direction; and manual polishing and paint spraying work of the inner wall face of the sleeve is replaced.

Description

Technical Field

[0001] The invention relates to the technical field of nuclear power plant penetration repair, and in particular to a support device, a nuclear power plant penetration casing grinding and painting device and a method thereof. Background Art

[0002] The penetration of a nuclear power plant is a process pipeline, which is a wall-penetrating connection component installed on the wall of the structure. Objects such as gas pipelines, liquid pipelines, and cables entering and exiting the reactor building that need to pass through the wall of the plant need to pass through the penetration. The main function of the penetration is to ensure the airtightness and integrity of the reactor building containment, prevent the leakage of radioactive substances, and isolate it from the outside. For example, the containment penetration is a key component connecting the pipeline between the reactor building and the peripheral building. Together with the containment, it forms a third barrier to ensure the airtightness and integrity of the containment and prevent the leakage of radioactive substances. The penetration is prefabricated and assembled by welding of multiple parts or installed on site. Therefore, welds will be formed at the joints of the various parts of the penetration. The penetration is usually made of carbon steel or stainless steel. In order to prevent the position of the weld from rusting, for stainless steel penetrations, the position of the weld is mainly treated by pickling and passivation. For carbon steel penetrations, anti-corrosion paint needs to be applied to the weld positions on the inner and outer surfaces of the penetration. The existing painting method is manual painting. However, the weld position on the inner surface of the penetration is more difficult to reach than the weld position on the outer surface of the penetration. For some penetrations with smaller pipe diameters, it is difficult for humans to enter the interior of the penetration to carry out painting work. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a support device, a nuclear power plant penetration casing grinding and painting device and a method thereof in view of at least one defect raised by the above-mentioned background technology.

[0004] The technical solution adopted by the present invention to solve the technical problem is: to provide a supporting device for grinding and painting the sleeve of the penetration piece of a nuclear power plant, which comprises a collar unit, a driving unit and a mounting seat for mounting a grinding device or a painting device;

[0005] The collar unit comprises at least two collars and a connector connected between adjacent collars, each collar being used to be sleeved on the outer periphery of a central pipe of a nuclear power plant penetration; at least one collar comprises an inner ring and an outer ring connected coaxially; the inner ring is arranged on a first end face of the outer ring, the inner periphery of the inner ring can contact the outer periphery of the central pipe, and a gear ring is arranged on the outer periphery of the inner ring;

[0006] The driving unit comprises a driving motor and a gear which are coaxially connected. The gear is also arranged on the first end surface and meshes with the gear ring. The mounting seat is connected with the inner ring.

[0007] Preferably, a first mounting hole is provided on the mounting seat; the polishing device comprises a supporting rod and a cutter connected to each other, and the paint spraying device comprises a paint spraying tube; the first mounting hole is used to clamp the supporting rod or the paint spraying tube.

[0008] Preferably, at least one of the collars is provided with a second mounting hole; the supporting device further comprises a camera and a bracket, one end of the bracket is snap-fitted with one of the second mounting holes, and the other end of the bracket is connected to the camera.

[0009] Preferably, the supporting device further comprises a power connection cable, the power connection cable is fixed through one of the second mounting holes, an input end of the power connection cable is used for an external power supply, and an output end of the power connection cable is connected to the camera and / or the driving unit.

[0010] Preferably, each of the collars comprises at least two sub-units, and the sub-units are spliced ​​together to form a ring, and at least two adjacent sub-units are detachably connected.

[0011] Preferably, the support device further comprises a sliding support unit, the sliding support unit is arranged on the collar unit, and the sliding support unit can be in sliding contact with the inner wall surface of the sleeve of the nuclear power plant penetration piece;

[0012] And / or, the supporting device further comprises a driving rod, wherein the driving rod is connected to the collar unit and is used for driving the collar unit to move along the central axis direction of the central pipe.

[0013] The present invention also provides a nuclear power plant penetration casing grinding and painting device, which comprises a grinding device, a painting device and any one of the above supporting devices;

[0014] The supporting device is connected to one of the grinding device and the painting device through the mounting seat in a working state.

[0015] The present invention also provides a method for grinding and painting a nuclear power plant penetration piece casing, which is implemented by using the above-mentioned nuclear power plant penetration piece casing grinding and painting device, and includes the following steps:

[0016] S1. Install the grinding device on the mounting seat on the collar unit of the supporting device, and sleeve the collar unit on the outer periphery of the central pipe of the nuclear power plant penetration;

[0017] S2, moving the collar unit along the central axis of the central pipe to a working position;

[0018] S3, starting the driving unit and the grinding device, so that the grinding device rotates relative to the central pipe around the central axis of the central pipe, so that the grinding device grinds the inner wall surface of the casing of the nuclear power plant penetration piece along the circumferential direction;

[0019] S4, after the grinding is completed, the operation of the driving unit and the grinding device is stopped, and the collar unit is moved to a non-working position in a direction away from the working position;

[0020] S5, removing the grinding device from the mounting seat, installing the painting device on the mounting seat, and re-sleeving the collar unit on the outer periphery of the central pipe of the nuclear power plant penetration;

[0021] S6, moving the collar unit back to the working position along the central axis direction of the central pipe;

[0022] S7, starting the driving unit and the paint spraying device, so that the paint spraying device rotates relative to the central pipe around the central axis of the central pipe, so that the paint spraying device sprays paint circumferentially to the inner wall surface of the casing of the nuclear power plant penetration.

[0023] The present invention has at least the following beneficial effects: the mounting seat can be equipped with a grinding device and a paint spraying device required for grinding and painting the inner wall surface of the sleeve; the sleeve ring unit provides support for the grinding device and the paint spraying device, and can drive the grinding device and the paint spraying device to enter the interior of the penetration piece (especially the penetration piece with a smaller pipe diameter); the mounting seat is connected to the inner ring, and the torque output by the driving motor is transmitted to the gear and the gear ring on the outer periphery of the inner ring in turn, thereby driving the inner ring and the mounting seat to rotate around the central axis y of the central pipe, thereby driving the grinding device to grind the inner wall surface of the sleeve along the circumferential direction or driving the paint spraying device to spray paint to the inner wall surface of the sleeve along the circumferential direction, thereby replacing manual work to complete the grinding and painting of the inner wall surface of the sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solution of the present invention, the present invention will be further described below in conjunction with the accompanying drawings and embodiments, in which:

[0025] Figure 1 It is a schematic diagram of the structure of some penetration parts in the prior art;

[0026] Figure 2 is a schematic diagram of the three-dimensional structure of the support device in some embodiments of the present invention;

[0027] Figure 3 yes Figure 2 A schematic diagram of the structure of the supporting device shown in the front view;

[0028] Figure 4 yes Figure 2A schematic structural diagram of the support device shown in FIG. 1 from a left perspective;

[0029] Figure 5 yes Figure 2 A schematic diagram of the structure of the support device shown in the rear view perspective;

[0030] Figure 6 is a schematic diagram of a three-dimensional structure of a support device in some embodiments of the present invention at another viewing angle;

[0031] Figure 7 It is a schematic diagram of the working state of a nuclear power plant penetration casing grinding and painting device according to some embodiments of the present invention. DETAILED DESCRIPTION

[0032] In order to have a clearer understanding of the technical features, purposes and effects of the present invention, specific embodiments of the present invention are now described in detail with reference to the accompanying drawings.

[0033] like Figure 1 As shown, some existing penetrations mainly include a casing 10 and a central pipe 11, and the casing 10 is embedded in a structure 12 (such as a containment wall). The diameter of the casing 10 is larger than the diameter of the central pipe 11, and the central pipe 11 is passed through the inside of the casing 10. Based on this, cables, liquid pipelines, gas pipelines, etc. can be passed through the inside of the central pipe 11 to achieve electrical / liquid / gas circuits on both sides of the structure 12, and ensure the integrity and sealing of the barrier of the structure 12. Usually, the casing 10 is welded together by a plurality of pipe sections, so that the connection position of adjacent pipe sections forms a weld position 13. In order to prevent the weld position 13 from being corroded and destroying the internal sealing and integrity of the casing 10, it is necessary to remove rust (grind) and anti-corrosion (spray paint) treatments on the weld position 13 on the inner and outer wall surfaces of the casing 10. Compared with the outer wall, the inner wall of the casing 10 is a more difficult area for personnel to reach. Therefore, the improvement of the present invention mainly focuses on the rust removal (grinding) and anti-corrosion (painting) treatment of the inner wall of the casing 10.

[0034] As mentioned in the background technology, it is difficult for humans to enter the penetration parts with smaller diameters to carry out rust removal and anti-corrosion work. Figures 2 to 6 As shown, the present invention first provides a supporting device, which is used for grinding and painting the inner wall surface of the sleeve 10 of the nuclear power plant penetration, that is, the supporting device is used in the grinding and painting work of the inner wall surface of the sleeve 10 of the nuclear power plant penetration. Specifically, the supporting device is used to install the grinding device and the painting device required for the grinding and painting work of the inner wall surface of the sleeve 10, provide support for the grinding device and the painting device, and can drive the grinding device and the painting device to enter the inside of the penetration to replace manual work to complete the grinding and painting work of the inner wall surface of the sleeve 10. In this way, the grinding and painting work of the inner wall surface of the penetration that is difficult to enter manually and has a small diameter can be successfully solved.

[0035] like Figures 2 to 6 As shown, in some embodiments, the support device includes a collar unit 2, a drive unit 3 and a mounting seat 4. The collar unit 2 is used to be sleeved on the outer periphery of the central pipe 11 of the nuclear power plant penetration. The collar unit 2 is adapted to the central pipe 11, and after being sleeved on the outer periphery of the central pipe 11, it can move along the central axis y of the central pipe 11 to reach a specific weld position 13.

[0036] The mounting seat 4 is used to install a grinding device or a painting device. The mounting seat 4 is connected to the collar unit 2, and can rotate relative to the central pipe 11 under the drive of the driving unit 3. When the mounting seat 4 rotates relative to the central pipe 11, it is actually equivalent to rotating relative to the inner wall surface of the sleeve 10. That is, one of the grinding device and the painting device can be installed on the mounting seat 4, so that one of the grinding device and the painting device rotates circumferentially with the mounting seat 4. During the circumferential rotation, the grinding device grinds the inner wall surface of the sleeve 10 circumferentially; or, the painting device sprays paint to the inner wall surface of the sleeve 10 circumferentially. In this way, the circumferential motion trajectory of the grinding device and the painting device is consistent with the circumferential weld trajectory on the inner wall surface of the sleeve 10, and the inner wall surface grinding and painting work of the sleeve 10 can be completed accurately and effectively.

[0037] The grinding device and the paint spraying device are prior art and can be set up with reference to the prior art. For example, the grinding device may include a supporting rod and a tool (grinding head) connected to each other, and the paint spraying device may include a paint spraying tube 80 (see Figure 7 When the support device is used, the paint spraying tube 80 is installed on the mounting seat 4, and the output end of the paint spraying tube 80 is away from the central pipe 11 and faces the inner wall surface of the sleeve 10; the input end of the paint spraying tube 80 is arranged outside the penetration piece and connected to the container containing paint.

[0038] like Figure 2As shown, in some embodiments, the collar unit 2 includes at least two collars 21 and a connector 22 connected between adjacent collars 21, and each collar 21 is used to be sleeved on the outer periphery of the central pipe 11. That is, the number of collars 21 is two or more. After the collars 21 are connected together by the connector 22, a solid whole is formed. In some other embodiments, the collar unit 2 may also include only one collar 21. When the collar unit 2 includes at least two collars 21, the interval between adjacent collars 21 can be used to accommodate some functional components. Specifically, the connector 22 can be rod-shaped. The number of the connector 22 can be one or more (two or more). Preferably, a plurality of connectors 22 are provided, and the plurality of connectors 22 are evenly distributed between two adjacent collars 21 along the circumferential interval of the collar 21. The inner circumference of the collar 21 is in direct contact with the outer circumference of the center pipe 11. In order to reduce the friction between the collar 21 and the center pipe 11 and reduce the damage to the center pipe 11, a lubricating layer can be provided on the inner circumference of the collar 21, and a small gap is reserved between the inner circumference of the collar 21 and the outer circumference of the center pipe 11.

[0039] like Figure 2 and Figure 3 As shown, in some embodiments, at least one collar 21 includes an inner ring 211 and an outer ring 210 that are coaxially connected. Figure 2 In the embodiment shown, the front ring 21 includes an inner ring 211 and an outer ring 210 connected coaxially. The outer ring 210 has a first end face 210a and a second end face 210b arranged opposite to each other. Figure 2 Taking the collar 21 on the front side as an example, its first end face 210a can be the end face (i.e., the front end face) of the collar 21 on the rear side, and its second end face 210b is the end face (i.e., the rear end face) of the collar 21 on the rear side. The inner ring 211 is arranged on the first end face 210a of the outer ring 210. The inner periphery of the inner ring 211 can contact the outer periphery of the central pipe 11, that is, when the collar 21 is sleeved on the outer periphery of the central pipe 11, the inner periphery of the inner ring 211 contacts the outer periphery of the central pipe 11. The outer periphery of the inner ring 211 is provided with a gear ring 23. The driving unit 3 includes a driving motor 31 and a gear 32 connected in a coaxial transmission manner. The gear 32 is also arranged on the first end face 210a, that is, the gear 32 and the inner ring 211 are arranged on the same end face of the outer ring 210. The gear 32 is meshed with the gear ring 23. Thus, the torque output by the driving motor 31 is sequentially transmitted to the gear 32 and the gear ring 23, thereby driving the inner ring 211 to rotate around the central axis y of the central pipe 11 on the outer periphery of the central pipe 11. The mounting seat 4 is connected to the inner ring 211, and when the inner ring 211 rotates around the central axis y of the central pipe 11 on the outer periphery of the central pipe 11, the mounting seat 4 and the polishing device or the painting device on the mounting seat 4 also rotate around the central axis y of the central pipe 11.

[0040] In summary, the present invention has at least the following technical effects: Figure 2 and Figure 7 The mounting seat 4 can be equipped with one of the grinding device and the painting device required for grinding and painting the inner wall surface of the sleeve 10; the collar unit 2 provides support for the grinding device and the painting device, and can drive the grinding device and the painting device to enter the interior of the penetration piece (especially the interior of the penetration piece with a smaller diameter that is difficult to enter manually); the mounting seat 4 is connected to the inner ring 211, and the torque output by the driving motor 31 is transmitted to the gear 32 and the ring gear 23 on the outer periphery of the inner ring 211 in sequence, thereby driving the inner ring 211 and the mounting seat 4 to rotate around the central axis y of the central pipe 11, thereby driving the grinding device to grind the inner wall surface of the sleeve 10 along the circumferential direction or driving the painting device to spray paint to the inner wall surface of the sleeve 10 along the circumferential direction, thereby replacing manual work to complete the grinding and painting of the inner wall surface of the sleeve 10.

[0041] Furthermore, if Figure 2 In the illustrated embodiment, the drive motor 31 is integrally arranged on the side of the second end face 210b of the outer ring 210 away from the first end face 210a. Since the gear 32 and the inner ring 211 are both arranged on the first end face 210a of the outer ring 210, the output shaft of the drive motor 31 needs to be coaxially connected with the gear 32, and a through hole penetrating the first end face 210a and the second end face 210b of the outer ring 210 is provided at the position corresponding to the gear 32, and the output shaft of the drive motor 31 is connected to the center hole of the gear 32 after passing through the through hole.

[0042] like Figure 2 and Figure 3 As shown, in some embodiments, the mounting seat 4 is provided with a first mounting hole 41, and the first mounting hole 41 is used to clamp the support rod or the paint spraying tube 80. For example, for a grinding device, the support rod can pass through the first mounting hole 41 and be clamped and fixed at the first mounting hole 41, and the tool is located at the end of the support rod away from the mounting seat 4, and the tool continuously rubs against the inner wall surface of the sleeve 10 along the circumferential direction to achieve grinding of the inner wall surface of the sleeve 10. For a paint spraying device, the paint spraying tube 80 can pass through the first mounting hole 41 and be clamped and fixed at the first mounting hole 41, and the output port of the paint spraying tube 80 is aligned with the inner wall surface of the sleeve 10, and the paint spraying tube 80 rotates along the circumferential direction while spraying paint from its output port, so that the paint is evenly coated on the inner wall surface of the sleeve 10 along the circumferential direction. Specifically, it is only necessary to control the output power of the driving motor 31 to control the rotation rate of the inner ring 211. The rotation rate of the inner ring 211 determines the rotation rate of the paint spray tube 80 on the mounting seat 4. Therefore, it is only necessary to control the transport rate of the paint and the output power of the driving motor 31 to ensure that the paint is evenly coated on the inner wall surface of the sleeve 10 along the circumferential direction. Therefore, the thickness of the paint spraying can be accurately controlled.

[0043] like Figure 2 As shown, in some embodiments, at least one of the collars 21 is provided with a second mounting hole 212. That is, only one collar 21 may be provided with a second mounting hole 212, or multiple collars 21 may be provided with second mounting holes 212. The supporting device further includes a camera 51 and a bracket 52. One end of the bracket 52 is engaged with one of the second mounting holes 212, and the other end of the bracket 52 is connected to the camera 51. Thus, the camera 51 can be fixed on the collar 21 through the bracket 52. The second mounting hole 212 can be provided on the inner ring 211 or on the outer ring 210. The camera 51, as an image sensor, can be used to receive image information on the inner wall surface of the casing 10. The camera 51 can transmit the image information back to a control system (such as a computer) outside the penetration member through wired communication or wireless communication, so that the staff outside the penetration member can know the actual situation of the inner wall surface of the casing 10, such as the weld position 13, and can inspect and evaluate the inner wall surface of the casing 10.

[0044] like Figure 2 As shown, in some embodiments, at least one of the camera 51 and the drive unit 3 (e.g., the drive motor 31) can be connected to an external power source by wired connection, and the external power source provides power or supplementary power to at least one of the camera 51 and the drive unit 3 (e.g., the drive motor 31). The support device also includes a power cable 6, which is fixed through one of the second mounting holes 212. The input end of the power cable 6 is used for an external power source, and the output end of the power cable 6 is connected to at least one of the camera 51 and the drive unit 3. That is, the output end of the power cable 6 can be connected to the camera 51, can also be connected to the drive unit 3 (e.g., the drive motor 31), and can also be connected to the camera 51 and the drive unit 3 (e.g., the drive motor 31) at the same time. As a result, the support device is equipped with a power cable 6, which serves as a connection medium between at least one of the camera 51 and the drive unit 3 (e.g., the drive motor 31) and the external power source. The output end of the power cable 6 can be pre-connected to at least one of the camera 51 and the drive unit 3 (for example, the drive motor 31). Therefore, when the device is used, it is only necessary to connect the external power connection line (referring to the outside of the penetration piece) to the input end of the power cable 6. The wiring is simple and convenient, and the device can be quickly assembled and put into use. Specifically, the input end of the power cable 6 can be a quick connector, and the external power connection line can be connected to the quick connector. Of course, in some other embodiments, at least one of the camera 51 and the drive unit 3 can have its own battery. Therefore, when the battery is sufficient and the working time is short, the power cable 6 can be omitted.

[0045] like Figures 2 to 6As shown, in some embodiments, each collar 21 includes at least two subunits 213, that is, each collar 21 may include two or more subunits 213. Each subunit 213 is spliced ​​together to form a closed ring. At least two adjacent subunits 213 are detachably connected, that is, only two adjacent subunits 213 may be detachably connected, or more than two adjacent subunits 213 may be detachably connected. At least two adjacent subunits 213 are detachably connected, so that the collar 21 has an open state and a closed state. Therefore, the collar 21 can be opened first, sleeved on the central pipe 11, and then closed, so that the collar 21 is convenient for disassembly and assembly. The detachable connection between adjacent subunits 213 may include at least one of a snap connection, a threaded connection, and a bolt connection.

[0046] like Figure 5 and Figure 6 As shown, in some embodiments, the supporting device also includes a sliding support unit, which is arranged on the collar unit 2, and the sliding support unit can slide in contact with the inner wall surface of the sleeve 10. Specifically, the sliding support unit may include a plurality of rollers 70, and the rollers 70 can slide in contact with the inner wall surface of the sleeve 10, thereby providing further support force for the polishing device or the painting device. When the sliding support unit and the collar unit 2 are provided at the same time, the sliding support unit and the collar unit 2 together provide stable support force for the polishing device or the painting device. Moreover, in this way, even if a small gap is reserved between the inner circumference of the collar 21 and the outer circumference of the center pipe 11, a stable support force can be provided by the sliding support unit to ensure the coaxiality (concentricity) between the collar 21 and the sleeve 10. Of course, as Figure 7 As shown, in some other embodiments, the sliding support unit may also include a telescopic bracket 72 and a track 71 connected to each other, the end of the telescopic bracket 72 away from the track 71 is connected to the collar unit 2, and the track 71 can slide in contact with the inner wall surface of the sleeve 10, thereby providing further support for the grinding device or the painting device. Specifically, the sliding support unit can be arranged on the outer ring 210.

[0047] In some embodiments, the nuclear power plant penetration casing grinding and painting device further includes a driving rod (not shown), which is connected to the collar unit 2 and is used to drive the collar unit 2 to move along the central axis y direction of the central pipe 11. Specifically, the driving rod can be connected to one or more collars 21. One end of the driving rod away from the collar unit 2 is arranged outside the penetration, and the driving rod can be manipulated by a person to push or pull the collar unit 2 to move along the central axis y direction of the central pipe 11.

[0048] The present invention also provides a grinding and painting device for a nuclear power plant penetration piece casing, which includes a grinding device, a painting device and a supporting device of any embodiment of the present invention. The grinding device and the painting device are detachably connected to the mounting seat 4 of the supporting device, respectively, and the supporting device is only connected to one of the grinding device and the painting device in the working state. The working state of the supporting device may refer to the state when it moves to the inside of the penetration piece and reaches the working position. That is, the grinding device can be installed on the mounting seat 4, and then the supporting device is pushed into the inside of the penetration piece to reach the weld position 13, and the inner wall surface of the casing 10 is ground by the grinding device; or, the painting device can be installed on the mounting seat 4, and then the supporting device is pushed into the inside of the penetration piece to reach the weld position 13, and the inner wall surface of the casing 10 is rotationally painted by the painting device. That is, the grinding device and the painting device are not installed on the supporting device at the same time.

[0049] In order to enable the support device to enter the interior of the penetration with a smaller diameter, such as Figure 7 As shown, the maximum cross-sectional dimension of the collar unit is larger than the outer diameter of the central pipe 11, and the maximum cross-sectional dimension of the collar unit is smaller than the inner diameter of the casing 10. In order to enable the grinding and painting device for the casing of the nuclear power plant penetration to enter the interior of the penetration with a smaller diameter, the maximum cross-sectional dimension of the whole formed by assembling the supporting device and the grinding device is larger than the outer diameter of the central pipe 11 and smaller than the inner diameter of the casing 10. The cross section refers to the cross section made in the direction perpendicular to the central axis y.

[0050] The present invention also provides a method for grinding and painting a nuclear power plant penetration casing, which is implemented by using the above-mentioned nuclear power plant penetration casing grinding and painting device, and the method at least comprises the following steps:

[0051] S1. Install the grinding device on the mounting seat 4 on the collar unit 2, and sleeve the collar unit 2 on the outer periphery of the central pipe 11 of the nuclear power plant penetration. Specifically, the collar unit 2 can be opened first, then sleeved on the outer periphery of the central pipe 11, and then the collar unit 2 can be closed to be fixed on the outer periphery of the central pipe 11.

[0052] S2, move the collar unit 2 to a working position along the central axis y direction of the central pipe 11. The working position is also the weld position 13 on the inner wall surface of the sleeve 10. Specifically, the driving rod can be used to push the collar unit 2 to move along the central axis y direction of the central pipe 11, and the camera 51 set on the collar 21 can be used to locate the weld position 13.

[0053] S3, start the driving unit 3 and the grinding device, so that the grinding device rotates relative to the central pipe 11 around the central axis y of the central pipe 11, so that the grinding device grinds the inner wall surface of the sleeve 10 along the circumferential direction. Specifically, the driving of the grinding device can refer to the prior art. For example, the grinding device can also include a motor for controlling the self-rotation of the tool, and the self-rotation of the tool can be started by starting the motor. In the process of the grinding device rotating with the collar unit 2, friction occurs between the rotating tool and the inner wall surface of the sleeve 10, so that the weld position 13 can be polished flat.

[0054] S4. After the grinding is completed, the operation of the driving unit 3 and the grinding device is stopped, and the collar unit 2 is moved to the non-working position in a direction away from the working position. The non-working position can be an area outside the penetration piece or an area inside the penetration piece, as long as it is an area accessible to personnel. Similarly, the driving rod can be used to pull the collar unit 2 to move along the central axis y direction of the central pipe 11. Specifically, the grinding device can be stopped by turning off the motor that controls the rotation of the tool.

[0055] S5. In a non-working position (an area accessible to personnel), the grinding device is removed from the mounting seat 4, the painting device is installed on the mounting seat 4, and the collar unit 2 is re-mounted on the outer periphery of the central pipe 11 of the nuclear power plant penetration.

[0056] S6. Move the collar unit 2 back to the working position along the central axis y direction of the central pipe 11.

[0057] S7, start the driving unit 3 and the paint spraying device, so that the paint spraying device rotates relative to the central pipe 11 around the central axis y of the central pipe 11, so that the paint spraying device sprays paint to the inner wall surface of the sleeve 10 along the circumferential direction. The driving of the paint spraying device can be achieved by controlling the speed of the paint input into the paint spraying pipe 80. The driving of the paint spraying device mainly relies on the operator outside the penetration to manually control the paint input into the paint spraying pipe 80, which can refer to the prior art.

[0058] Furthermore, after step S7, the following steps may also be included:

[0059] Step S8: After the painting is completed, the operation of the driving unit 3 and the painting device is stopped, and the collar unit 2 is moved to the non-working position in a direction away from the working position.

[0060] Step S9: Remove the paint spraying device from the mounting base 4 in a non-working position (an area accessible to personnel).

[0061] In summary, in the method for grinding and painting the casing of a nuclear power plant penetration piece of the present invention, the grinding device is first installed on the supporting device, and after the grinding is completed, the supporting device is moved out of the working position, and then the painting device is installed. In this way, each time the supporting device works, it only carries one of the grinding device and the painting device, which is conducive to reducing the weight of the supporting device each time it works, is suitable for shuttling inside a narrow penetration piece, and is simple to operate and easy to implement.

[0062] It can be understood that the above embodiments only express the preferred implementation modes of the present invention, and the description thereof is relatively specific and detailed, but it cannot be understood as limiting the patent scope of the present invention. It should be pointed out that, for ordinary technicians in this field, without departing from the concept of the present invention, the above technical features can be freely combined, and several deformations and improvements can be made, which all belong to the protection scope of the present invention. Therefore, all equivalent changes and modifications made to the scope of the claims of the present invention should belong to the scope covered by the claims of the present invention.

Claims

1. A support device for grinding and painting the casing of a nuclear power plant penetration, characterized in that: It comprises a collar unit (2), a drive unit (3) and a mounting seat (4) for mounting a grinding device or a painting device; The collar unit (2) comprises at least two collars (21) and a connecting piece (22) connected between adjacent collars (21); each collar (21) is used to be sleeved on the outer periphery of a central pipe (11) of a nuclear power plant penetration piece; at least one collar (21) comprises an inner ring (211) and an outer ring (210) which are coaxially connected; the inner ring (211) is arranged on a first end surface (210a) of the outer ring (210); the inner periphery of the inner ring (211) can contact the outer periphery of the central pipe (11); and the outer periphery of the inner ring (211) is provided with a gear ring (23); The drive unit (3) comprises a drive motor (31) and a gear (32) connected in a coaxial transmission manner, wherein the gear (32) is also arranged on the first end surface (210a), and the gear (32) is meshed with the gear ring (23); and the mounting seat (4) is connected to the inner ring (211).

2. The support device according to claim 1, characterized in that The mounting seat (4) is provided with a first mounting hole (41); the polishing device comprises a supporting rod and a cutter connected to each other, and the paint spraying device comprises a paint spraying tube (80); the first mounting hole (41) is used to clamp the supporting rod or the paint spraying tube (80).

3. The supporting device according to claim 1, characterized in that At least one of the collars (21) is provided with a second mounting hole (212); the support device further comprises a camera (51) and a bracket (52); one end of the bracket (52) is snap-fitted with one of the second mounting holes (212), and the other end of the bracket (52) is connected to the camera (51).

4. The support device according to claim 3, characterized in that The support device further comprises a power connection cable (6), the power connection cable (6) being fixed through one of the second mounting holes (212), the input end of the power connection cable (6) being used for an external power supply, and the output end of the power connection cable (6) being connected to the camera (51) and / or the drive unit (3).

5. The support device according to claim 1, characterized in that Each of the collars (21) comprises at least two sub-units (213), and the sub-units (213) are spliced ​​together to form a ring shape, and at least two adjacent sub-units (213) are detachably connected.

6. The support device according to claim 1, characterized in that The support device further comprises a sliding support unit, the sliding support unit being arranged on the collar unit (2), and the sliding support unit being capable of slidingly contacting with the inner wall surface of the sleeve (10) of the nuclear power plant penetration piece; And / or, the supporting device further comprises a driving rod, wherein the driving rod is connected to the collar unit (2) and is used to drive the collar unit (2) to move along the central axis (y) direction of the central pipe (11).

7. A nuclear power plant penetration casing grinding and painting device, characterized in that: It comprises a grinding device, a painting device and a supporting device according to any one of claims 1 to 6; In a working state, the supporting device is connected to one of the grinding device and the painting device through the mounting seat (4).

8. A method for polishing and painting a nuclear power plant penetration casing, characterized in that: The method is implemented by using the nuclear power plant penetration casing grinding and painting device as claimed in claim 7, comprising the following steps: S1, installing the grinding device on the mounting seat (4) on the collar unit (2) of the supporting device, and sleeve the collar unit (2) on the outer periphery of the central pipe (11) of the nuclear power plant penetration; S2, moving the collar unit (2) along the central axis (y) direction of the central pipe (11) to a working position; S3, starting the driving unit (3) and the grinding device, causing the grinding device to rotate relative to the central pipe (11) around the central axis (y) of the central pipe (11), so that the grinding device grinds the inner wall surface of the casing (10) of the nuclear power plant penetration piece along the circumferential direction; S4, after the grinding is completed, the operation of the driving unit (3) and the grinding device is stopped, and the collar unit (2) is moved to a non-working position in a direction away from the working position; S5, removing the grinding device from the mounting seat (4), installing the painting device on the mounting seat (4), and re-mounting the collar unit (2) on the outer periphery of the central pipe (11) of the nuclear power plant penetration piece; S6, moving the collar unit (2) back to the working position along the central axis (y) direction of the central pipe (11); S7, starting the driving unit (3) and the paint spraying device, causing the paint spraying device to rotate relative to the central pipe (11) around the central axis (y) of the central pipe (11), so that the paint spraying device sprays paint circumferentially onto the inner wall surface of the sleeve (10) of the nuclear power plant penetration component.

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