CN117983909A - Nuclear power plant valve flange screw hole overhauling device - Google Patents

Abstract

The invention discloses a nuclear power plant valve flange screw hole overhauling device which comprises a Y-direction moving mechanism, an X-direction moving mechanism, a rotating mechanism, a tensioning mechanism and an executing mechanism, wherein the Y-direction moving mechanism is arranged on the rotating mechanism; the Y-direction moving mechanism, the X-direction moving mechanism and the rotating mechanism are mutually connected, the tensioning mechanism is connected with the Y-direction moving mechanism, and the executing mechanism is connected with the X-direction moving mechanism; the actuating mechanism comprises a repairing machine head for overhauling the flange screw hole of the valve of the nuclear power plant. The overhaul device for the valve flange screw hole of the nuclear power plant can solve the problem of bolt seizure caused by slight damage to screw threads and residual foreign matters of the valve flange screw hole of the nuclear power plant, improve the maintenance quality of the nuclear grade valve, reduce the collective dosage of maintenance personnel and ensure the safe and stable operation of a unit.

Description

Nuclear power plant valve flange screw hole overhauling device

Technical Field

The invention relates to nuclear power technology, in particular to a nuclear power plant valve flange screw hole overhauling device.

Background

The flange bolts in the primary circuit boundary gate valve of the nuclear power plant belong to the pressure-bearing boundary, and relate to nuclear safety, if the valve body bolts are seized, the valve overhaul period is prolonged, the overhaul period is influenced, and if the screw holes of the valve body are seriously damaged, the service life and the reliability of the valve are reduced. If the condition that the flange bolt is blocked in the loop boundary gate valve occurs, great economic loss can be caused, but currently, the valve screw hole in the nuclear power industry is mainly repaired manually, the efficiency is low, the cost is high, and workers can be in an irradiation environment. With the increase of service life and maintenance frequency of the one-circuit valve.

Disclosure of Invention

The invention aims to solve the technical problem of providing a nuclear power plant valve flange screw hole overhauling device.

The technical scheme adopted for solving the technical problems is as follows: constructing a nuclear power plant valve flange screw hole overhauling device, which comprises a Y-direction moving mechanism, an X-direction moving mechanism, a rotating mechanism, a tensioning mechanism and an executing mechanism;

The Y-direction moving mechanism, the X-direction moving mechanism and the rotating mechanism are mutually connected, the tensioning mechanism is connected with the Y-direction moving mechanism, and the executing mechanism is connected with the X-direction moving mechanism;

the actuating mechanism comprises a repairing machine head for overhauling the flange screw hole of the valve of the nuclear power plant.

In some embodiments, the Y-direction moving mechanism comprises a first bracket and a Y-direction moving component arranged on the first bracket, the X-direction moving mechanism comprises a second bracket and an X-direction moving component arranged on the second bracket, and the second bracket is connected with the Y-direction moving component;

The rotary mechanism is connected with the first bracket to drive the first bracket to rotate along the circumferential direction, the tensioning mechanism is connected with the first bracket, and the tensioning mechanism is used for being fixed in a hole in the middle of the valve flange of the nuclear power plant.

In some embodiments, the first bracket comprises a first bottom plate and a first mounting plate vertically connected with the first bottom plate, the Y-direction moving assembly comprises a Y-direction linear module, the first bottom plate is connected with the rotating mechanism, and the Y-direction linear module is mounted on the first mounting plate;

the second bracket comprises a second bottom plate and a second mounting plate which is vertically connected with the second bottom plate, the X-direction moving assembly comprises an X-direction linear module, and the second bottom plate is connected with a sliding block of the Y-direction linear module; the X-direction linear module is arranged on the second mounting plate, and the actuating mechanism is connected with the X-direction linear module.

In some embodiments, the rotation mechanism includes a rotation platform coupled to the first base plate to drive the first bracket to rotate circumferentially.

In some embodiments, the tensioning mechanism comprises a fixed body, a tensioning block, a connecting rod and an operating piece, wherein the connecting rod penetrates through the first bottom plate, the upper end of the connecting rod is connected with the operating piece, and a cone is arranged at the lower end of the connecting rod;

The fixed body has the storage tank, the circumference side of fixed body is equipped with a plurality of through-holes, tensioning piece movable mounting in the through-hole, the cone install in the storage tank, so that the drive tensioning piece is followed the through-hole removes, makes the fixed body is fixed in the downthehole of nuclear power plant valve flange centre.

In some embodiments, the actuator further comprises a third mounting plate, a hollow rotating platform, a buffer assembly, a multi-station mounting bracket, and a prosthetic handpiece;

The hollow rotating platform is connected with the sliding block of the X-direction linear module through the third mounting plate, the hollow rotating platform is connected with the buffer assembly, the buffer assembly is connected with the multi-station mounting frame, and the repairing machine head is connected with the multi-station mounting frame.

In some embodiments, the cushioning assembly includes a base plate, a guide shaft, an elastic member;

The multi-station mounting frame comprises a first fixing plate, a second fixing plate and a connecting plate; the first fixing plate and the second fixing plate are arranged in parallel at intervals, and the connecting plate is connected with the first fixing plate and the second fixing plate;

The base plate is positioned above the first fixed plate, the upper end of the guide shaft is connected with the base plate, the lower end of the guide shaft is connected with the first fixed plate and is relatively fixed, and the elastic piece is arranged between the base plate and the first fixed plate;

The repairing machine head is connected with the second fixing plate.

In some embodiments, the number of the guide shafts is a plurality, and the plurality of the guide shafts are arranged at intervals along the center of the substrate;

the elastic piece comprises a spiral spring, and the spiral spring is sleeved on the part, located between the base plate and the first fixing plate, of the guide shaft.

In some embodiments, the repairing machine head comprises a detecting machine head, the detecting machine head comprises a mounting rod, the upper end of the mounting rod is connected with the second fixing plate, and the lower end of the mounting rod is provided with a positioning block;

The positioning block comprises a columnar part and a conical part, the upper end of the columnar part is connected with the lower end of the mounting rod, the upper end of the conical part is connected with the lower end of the columnar part, a positive camera is arranged at the bottom of the conical part, and a plurality of side cameras are arranged in the circumferential direction of the conical part; and a limit switch is arranged on the circumferential side surface of the columnar part.

In some embodiments, the circumferential side of the columnar portion has a mounting plane on which the limit switch is mounted.

In some embodiments, the prosthetic handpiece further comprises a cleaning handpiece;

The cleaning machine head comprises a first driving piece, a brush and a water suction head, wherein the brush comprises a hollow brush rod and a brush head provided with the brush rod, the upper end of the brush rod is connected with the first driving piece, the other end of the brush rod is connected with the water suction head, and a plurality of circles of water spray holes are uniformly formed in the wall surface of the brush rod along the axial direction and are used for spraying cleaning media to the inner surface of a flange screw hole of a valve of a nuclear power plant;

And an absorption pipeline connected with the water suction head is further arranged in the brush rod.

In some embodiments, the prosthetic handpiece further comprises a dryer handpiece;

the drying machine head comprises a second driving piece and a drying cylinder, wherein the upper end of the drying cylinder is connected with the second driving piece, and a plurality of air outlet holes are uniformly formed in the circumferential wall surface and the bottom of the drying cylinder.

In some embodiments, the prosthetic handpiece further comprises a polisher handpiece;

The polishing machine head comprises a third driving piece, a polishing brush and a dust collection head, wherein the polishing brush comprises a hollow polishing brush rod and a polishing brush head arranged on the polishing brush rod, the upper end of the polishing brush rod is connected with the third driving piece, the other end of the polishing brush rod is connected with the dust collection head, and an absorption pipeline connected with the dust collection head is further arranged inside the polishing brush rod.

In some embodiments, the second fixing plate is provided with a plurality of mounting holes, the mounting holes are uniformly distributed on a circle taking the center of the second fixing plate as the center of a circle, and each mounting hole is connected with a corresponding repairing machine head.

In some embodiments, the nuclear power plant valve flange screw hole overhauling device further comprises an industrial personal computer connected with the Y-direction moving mechanism, the X-direction moving mechanism, the rotating mechanism and the executing mechanism.

The implementation of the invention has the following beneficial effects: the overhaul device for the valve flange screw hole of the nuclear power plant can solve the problem of bolt seizure caused by slight damage to screw threads and residual foreign matters of the valve flange screw hole of the nuclear power plant, improve the maintenance quality of the nuclear grade valve, reduce the collective dosage of maintenance personnel and ensure the safe and stable operation of a unit.

Drawings

In order to more clearly illustrate the technical solution of the present invention, the following description will be given with reference to the accompanying drawings and examples, it being understood that the following drawings only illustrate some examples of the present invention and should not be construed as limiting the scope, and that other related drawings can be obtained from these drawings by those skilled in the art without the inventive effort. In the accompanying drawings:

FIG. 1 is a schematic illustration of one application of a nuclear power plant valve flange screw service apparatus in accordance with some embodiments of the present invention;

FIG. 2 is a second schematic illustration of an application of a nuclear power plant valve flange screw service apparatus according to some embodiments of the present invention;

FIG. 3 is a third application schematic of a nuclear power plant valve flange screw service apparatus according to some embodiments of the present invention;

FIG. 4 is a schematic illustration of an application of a nuclear power plant valve flange screw service apparatus in accordance with some embodiments of the present invention;

FIG. 5 is one of the structural schematic diagrams of the tensioning mechanism in some embodiments of the present invention;

FIG. 6 is a second schematic diagram of a tensioning mechanism in some embodiments of the invention;

FIG. 7 is a schematic diagram of a cushioning assembly in some embodiments of the present invention;

FIG. 8 is a schematic illustration of a multi-station mount in accordance with some embodiments of the invention;

FIG. 9 is a second schematic illustration of a multi-station mount in accordance with some embodiments of the invention;

FIG. 10 is one of the schematic structural views of a prosthetic handpiece in some embodiments of the invention;

FIG. 11 is a second schematic illustration of the configuration of a prosthetic handpiece in some embodiments of the invention;

fig. 12 is a schematic structural view of a detecting handpiece in some embodiments of the invention.

Detailed Description

For a clearer understanding of technical features, objects and effects of the present invention, a detailed description of embodiments of the present invention will be made with reference to the accompanying drawings. In the following description, it should be understood that the directions or positional relationships indicated by "front", "rear", "upper", "lower", "left", "right", "longitudinal", "transverse", "vertical", "horizontal", "top", "bottom", "inner", "outer", "head", "tail", etc. are configured and operated in specific directions based on the directions or positional relationships shown in the drawings, are merely for convenience of describing the present invention, and do not indicate that the apparatus or element to be referred to must have specific directions, and thus should not be construed as limiting the present invention.

It should also be noted that unless explicitly stated or limited otherwise, terms such as "mounted," "connected," "secured," "disposed," and the like are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communicated with the inside of two elements or the interaction relationship of the two elements. When an element is referred to as being "on" or "under" another element, it can be "directly" or "indirectly" on the other element or one or more intervening elements may also be present. The terms "first," "second," "third," and the like are used merely for convenience in describing the present invention and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated, whereby features defining "first," "second," "third," etc. may explicitly or implicitly include one or more such features. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the following description, for purposes of explanation and not limitation, specific details are set forth such as the particular system architecture, techniques, etc., in order to provide a thorough understanding of the embodiments of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present invention with unnecessary detail.

Referring to fig. 1to 4, the invention discloses a device for overhauling a flange screw hole of a valve in a nuclear power plant, which can be used as a special tool for automatically cleaning, checking and repairing the flange screw hole in a low water level valve of a primary loop of a nuclear island, so as to ensure safe and stable operation of a nuclear power unit and achieve the aim of reducing collective dosage and operation cost of the power plant.

In some embodiments, the nuclear power plant valve flange screw hole inspection device may include a Y-direction moving mechanism 10, an X-direction moving mechanism 20, a rotating mechanism 30, a tensioning mechanism 40, and an actuating mechanism 50, wherein the Y-direction moving mechanism 10, the X-direction moving mechanism 20, and the rotating mechanism 30 are connected to each other, the tensioning mechanism 40 is connected to the Y-direction moving mechanism 10, and the actuating mechanism 50 is connected to the X-direction moving mechanism 20; the actuator 50 includes a prosthetic head 55 for servicing a nuclear power plant valve flange screw 102.

The maintenance device for the flange screw holes of the valve in the nuclear power plant can solve the problem that the flange screw holes in the important valve with low water level in the primary loop of the nuclear island are bitten by bolts due to slight damage of threads and residual foreign matters, improve the maintenance quality of the nuclear-grade valve, reduce the collective dosage of maintenance personnel, and ensure the safe and stable operation of a unit.

In some embodiments, the Y-direction moving mechanism 10 includes a first bracket 11 and a Y-direction moving assembly 12 disposed on the first bracket 11, the X-direction moving mechanism 20 includes a second bracket 21 and an X-direction moving assembly 22 disposed on the second bracket 21, and the second bracket 21 is connected to the Y-direction moving assembly 22.

The rotation mechanism 30 is connected to the first bracket 11 to drive the first bracket 11 to rotate in a circumferential direction, and the tensioning mechanism 40 is connected to the first bracket 11, and the tensioning mechanism 40 is fixed in a hole 101 in the middle of the valve flange 100 of the nuclear power plant.

In some embodiments, the first bracket 11 is substantially L-shaped, the first bracket 11 includes a first bottom plate 111 and a first mounting plate 112 vertically connected to the first bottom plate 111, and a plurality of reinforcing ribs (ribs) may be further disposed on the first bracket 11 to enhance the overall strength of the first bracket 11.

The Y-direction moving assembly 22 includes a Y-direction linear module, which is mounted on a first mounting plate 112, and the first base plate 111 is connected to the rotating mechanism 30. The model of the Y-direction linear module is selected from GTB8-L5-150-BC-M20-C4.

In some embodiments, the second support 21 is substantially L-shaped, the second support 21 includes a second bottom plate 211 and a second mounting plate 212 perpendicularly connected to the second bottom plate 211, and a plurality of reinforcing ribs may be further disposed on the second support 21 to enhance the overall strength of the second support 21. The X-direction moving assembly 12 comprises an X-direction linear module, and the second bottom plate 211 is connected with a slide block of the Y-direction linear module; the X-direction linear module is mounted on the second mounting plate 212, and the actuator 50 is connected to the X-direction linear module. The X-direction linear module model can be selected from GTB8-L5-150-BC-M20-C4.

In some embodiments, the rotation mechanism 30 may include a rotation platform connected to the first base plate 111 to drive the first bracket 11 to rotate circumferentially. The rotary platform may be an MTB130-18-B hollow rotary platform.

As shown in fig. 5 and 6, in some embodiments, the tensioning mechanism 40 includes a fixed body 41, a tensioning block 42, a connecting rod 43, and an operating member 44, where the connecting rod 43 is disposed through the first base plate 111, and an upper end of the connecting rod 43 is connected to the operating member 44, and a cone 45 is disposed at a lower end of the connecting rod 43; the fixing body 41 has a receiving slot 411, a plurality of through holes 412 are formed in the circumferential side surface of the fixing body 41, the tensioning block 42 is movably mounted in the through holes 412, and the cone 45 is mounted in the receiving slot 411 to drive the tensioning block 42 to move along the through holes 412, so that the fixing body 41 is fixed in the hole 101 in the middle of the valve flange 100 of the nuclear power plant.

For example, when the operating member 44 drives the link 43 to move downward, the cone 45 may be driven to move downward, and at this time, the inclined surface of the cone 45 and the inclined surface of the tensioning block 42 are pressed against each other, so that the tensioning block 42 moves radially outward, and the tensioning mechanism 40 is fixed in the hole 101, preferably, the link 43 may be a screw structure, and the upper end of the fixing block 41 is provided with a screw hole to be screwed with the link 43. Preferably, the tensioning blocks 42 may be arranged in three spaced apart positions. Of course, the tensioning block 42 may be provided in other numbers, which are not particularly limited herein. Preferably, the operating member 44 is a hand wheel or a straight operating handle.

In some embodiments, the actuator 50 further includes a third mounting plate 51, a hollow rotating platform 52, a buffer assembly 53, a multi-station mount 54, and a prosthetic head 55. The hollow rotating platform 52 is connected with the slide block of the X-direction linear module through the third mounting plate 51 so as to realize the position adjustment in the X-direction. The hollow rotary platform 52 is connected with a buffer assembly 53, the buffer assembly 53 is connected with a multi-station mounting frame 54, and a repairing machine head 55 is connected with the multi-station mounting frame 54. Preferably, the hollow rotary platform 52 is optionally number Y200RA100.

As shown in fig. 7-9, in some embodiments, the buffer assembly 53 includes a base plate 531, a guide shaft 532, and an elastic member 533; the multi-station mounting bracket 54 includes a first fixing plate 541, a second fixing plate 542, and a connection plate 543; the first fixing plate 541 and the second fixing plate 542 are disposed in parallel with each other with a space therebetween, and the connection plate 543 connects the first fixing plate 541 and the second fixing plate 542, and the space between the first fixing plate 541 and the second fixing plate 542 forms a component mounting space of the prosthetic head 55.

The base plate 531 is located above the first fixing plate 541, the upper end of the guide shaft 532 is connected to the base plate 531, the lower end of the guide shaft 532 is connected to the first fixing plate 541 and is fixed relatively, and the elastic member 533 is disposed between the base plate 531 and the first fixing plate 541; the prosthetic handpiece 55 is coupled to the second fixation plate 542.

Preferably, the first fixing plate 541 is provided with a plurality of fixing holes 5411, the lower end of the guide shaft 532 can be disposed through the fixing holes 5411, and the lower end of the guide shaft 532 is provided with a limiting protrusion, so that the guide shaft 532 cannot fall out of the first fixing plate 541.

Preferably, the number of the guide shafts 532 is plural, and the plurality of guide shafts 532 are disposed at intervals along the center of the base plate 531; the elastic member 533 includes a coil spring fitted over a portion of the guide shaft 532 between the base plate 531 and the first fixing plate 541.

Preferably, the number of the guide shafts 532 may be plural (e.g., four), and the plurality of guide shafts 532 are mounted on the substrate 531 and uniformly distributed on a circle centered on the center of the substrate 531. The damping assembly 53 is used to damp the reaction forces of the prosthetic head 55 impinging on the surface of the nuclear power plant valve flange 100 due to improper operation.

As shown in fig. 10 to 12, the repairing head 55 may include a detecting head 551, the detecting head 551 includes a mounting bar 5511, an upper end of the mounting bar 5511 is connected with the second fixing plate 542, and may be fixedly connected or detachably connected, and a positioning block 5512 is disposed at a lower end of the mounting bar 5511.

The positioning block 5512 may include a cylindrical portion 55121 and a tapered portion 55122, where the upper end of the cylindrical portion 55121 is connected to the lower end of the mounting rod 5511, the upper end of the tapered portion 55122 is connected to the lower end of the cylindrical portion 55121, the bottom of the tapered portion 55122 is provided with a front camera 5513, the circumferential direction of the tapered portion 55122 is provided with a plurality of side cameras 5514, or the bottom of the tapered portion 55122 may be further provided with a cylindrical protrusion, the front camera 5513 is disposed at the bottom of the cylindrical protrusion, the side cameras 5514 are disposed at the circumferential side of the cylindrical protrusion, and the axis of the cylindrical protrusion coincides with the axis of the positioning block 5512; a limit switch 5515 is provided on the circumferential side surface of the columnar portion 55121. The columnar portion 55121 may be cylindrical, the radius of which is slightly smaller than that of the nuclear power plant valve flange screw hole 102 to be cleaned, when the positioning block 5512 can be completely inserted into the nuclear power plant valve flange screw hole 102 to describe that positioning is completed, a cylindrical protrusion is arranged at the bottom of the positioning block 5512, when a front camera 5513 is installed on the bottom surface of the cylindrical protrusion for positioning, whether the positioning block 5512 is coaxial with the nuclear power plant valve flange screw hole 102 is observed, three side cameras 5514 are uniformly arranged in the circumferential direction of the cylindrical protrusion for checking the nuclear power plant valve flange screw hole 102 before and after repair, and image information shot by the front camera 5513 and the three side cameras 5514 can be uploaded to an industrial personal computer for display. The front camera 5513 and the side camera 5514 can be configured with wireless communication modules to be in communication connection with the industrial personal computer or other intelligent platforms.

As shown in fig. 12, in some embodiments, the circumferential side of the pillar portion 55121 has a mounting plane 55121a, and the limit switch 5515 is mounted on the mounting plane 55121 a.

As shown in connection with fig. 10-11, in some embodiments, the prosthetic head 55 further includes a cleaning head 552 for cleaning impurities, grease and other foreign matter present on the inner wall surface of the nuclear power plant valve flange screw hole 102.

The cleaning head 552 may include a first driving member 5521, a brush 5522, and a suction head 5523, the brush 5522 includes a hollow brush rod 55221 and a brush head 55222 provided with the brush rod 55221, an upper end of the brush rod 55221 is connected with the first driving member 5521, another end of the brush rod 55221 is connected with the suction head 5523, an upper end of the brush rod 55221 may be provided with a first connecting member 5524, the first connecting member 5524 is connected with the first driving member 5521, the first driving member 5521 may be installed in a space between the second fixing plate 542 and the first fixing plate 541, and an upper end of the first connecting member 5524 may be provided with a key slot, and an output end of the first driving member 5521 is inserted into the key slot to drive the first connecting member 5524 to rotate. The first driving member 5521 may include a driving motor, which may include a servo motor, and a decelerator, which are connected to each other. The output end of the decelerator is connected with the first connecting piece 5524.

The wall surface of the brush rod 55221 is uniformly provided with a plurality of circles of water spray holes 55223 along the axial direction, and the water spray holes are used for spraying cleaning media to the inner surface of the flange screw hole 102 of the valve of the nuclear power plant, wherein the cleaning media comprise cleaning agents and/or clear water; the bristles 55222 may be of a flexible nylon material for thoroughly mixing the cleaning agent with the oil dirt during rotation of the cleaning head 552 to clean the oil dirt. The brush rod 55221 is further provided with an absorption pipeline connected with the water suction head 5523, specifically, an absorption pipeline is arranged in the middle of the brush rod 55221, the upper end of the absorption pipeline can be connected with an absorption device, and the lower end of the absorption pipeline is connected with the water suction head 5523 to suck the cleaned waste liquid out of the flange screw hole 102 of the valve of the nuclear power plant.

Preferably, the brush 5522 may be provided with a first shield 5525 on the outside thereof, and the first shield 5525 may be an elastic gas shield. The end of the first shield 5525 has a strong sealability for preventing leakage of waste liquid and dust generated during the repair process.

Referring to fig. 10 to 11, in some embodiments, the repairing head 55 further includes a drying head 553 for drying the moisture on the threaded surface of the cleaned flange screw hole 102 of the valve of the nuclear power plant; the dryer head 553 can comprise a second driving part 5531 and a dryer tube 5532, wherein the upper end of the dryer tube 5532 is connected with the second driving part 5531, the upper end of the dryer tube 5532 can be provided with a second connecting part, the second connecting part can be a flange, and a plurality of air outlets 55321 are uniformly arranged on the circumferential wall surface and the bottom of the dryer tube 553. Preferably, a through hole (such as a threaded through hole) is formed in the middle of the flange, the upper half part of the through hole can be connected with an air outlet of the air supply device, the lower half part of the through hole is connected with the drying cylinder 5532, the drying cylinder 5532 is of a cylindrical hollow structure, the upper end of the drying cylinder 5532 is inserted into a flange threaded hole of the flange, a plurality of air outlet holes 55321 are uniformly formed in the axial direction and the bottom of the drying cylinder 5532, and hot air blown by the air supply device (such as a blower) is dried and cleaned on the threaded surface through the air outlet holes 55321. The second driving member 5531 may include a driving motor, which may include a servo motor, and a decelerator, which are connected to each other.

Preferably, the outside of the drum 5532 may be provided with a second shield 5534, and the second shield 5534 may be an elastic air shield. The end of the second shield cap 5534 has a strong sealing property for preventing leakage of waste liquid and dust generated during the repair process.

Referring to fig. 10-11, in some embodiments, the prosthetic head 55 further includes a polisher head 554 for removing rust from and polishing the threaded surface of the nuclear power plant valve flange screw hole 102; the polisher head 554 may include a third driving member 5541, a polishing brush 5542 and a dust suction head 5543, the polishing brush 5542 includes a hollow polishing brush rod 55421 and a polishing brush head 55422 provided on the polishing brush rod 55421, an upper end of the polishing brush rod 55421 is connected with the third driving member 5541, the other end of the polishing brush rod 55421 is connected with the dust suction head 5543, an upper end of the polishing brush rod 55421 may be provided with a third connecting member, the third driving member 5541 is connected with the third connecting member for driving the polisher head 554 to rotate at a high speed, and the polishing brush 5542 is inserted into a threaded hole of a lower surface of the third connecting member. The polishing brush rod 55421 is also provided with an absorption pipeline connected with the dust collection head 5543. Specifically, the polishing brush head 55422 is a wire brush, the polishing brush rod 55421 is of a hollow structure, an absorption pipeline is arranged in the middle, the upper end of the absorption pipeline is connected with the absorption device/absorption system through a communication hole on the third connecting piece, and the lower end of the absorption pipeline is connected with the dust collection head 5543 and is used for collecting impurities (such as dust) generated in the polishing process.

Preferably, the third driving member 5541 may include a driving motor and a decelerator connected to each other, and the driving motor may include a servo motor.

Preferably, the polishing brush 5542 may be provided with a third protection cap 5544 at the outside thereof, and the third protection cap 5544 may be an elastic gas cap. The end of the third shield 5544 has a strong sealability for preventing leakage of waste liquid and dust generated during the repair process.

As shown in fig. 9 to 11, in some embodiments, the second fixing plate 542 is provided with a plurality of mounting holes, and the plurality of mounting holes are uniformly distributed on a circle centered on the center of the second fixing plate 542, and each mounting hole is connected to a corresponding repairing head 55.

For example, the mounting holes may include a first mounting hole 5421, a second mounting hole 5422, a third mounting hole 5423, and a fourth mounting hole 5424 (as shown in fig. 9), where the first mounting hole 5421 may be mounted by the inspection head 551, the second mounting hole 5422 may be mounted by the cleaning head 552, the third mounting hole 5423 may be mounted by the drying head 553, and the fourth mounting hole 5424 may be mounted by the polishing head 554.

Preferably, the detecting head 551, the cleaning head 552, the drying head 553, the polishing head 554 and the multi-station mounting frame 54 are detachably mounted, so that the detecting head 551, the cleaning head 552, the drying head 553, the polishing head 554 can be conveniently adjusted in position, disassembled and overhauled.

In some embodiments, the nuclear power plant valve flange screw hole inspection device further comprises an industrial personal computer connected with the Y-direction moving mechanism 10, the X-direction moving mechanism 20, the rotating mechanism 30 and the executing mechanism 50. The industrial personal computer can control the working states of the Y-direction moving mechanism 10, the X-direction moving mechanism 20, the rotating mechanism 30 and the executing mechanism 50 so as to realize automatic operation.

In some embodiments, the nuclear power plant valve flange screw service apparatus is applied as follows:

The detection machine head 551 is rotated to the position above the valve flange screw hole 102 of the nuclear power plant by adjusting the Y-direction moving mechanism 10, the X-direction moving mechanism 20 and the rotating mechanism 30, the position of the detection machine head 551 is continuously adjusted according to the picture shot by the front-view camera displayed in the display of the industrial personal computer, when the detection machine head 551 is coaxial with the valve flange screw hole 102 of the nuclear power plant and can be inserted into the valve flange screw hole 102 of the nuclear power plant to describe the positioning completion, the detection machine head 551 is removed from the valve flange screw hole 102 of the nuclear power plant, an automatic cleaning function is started, and the following process is automatically carried out; preferably, the image processing device in the industrial personal computer can perform operations such as cutting, graying processing, filtering, boundary extraction and the like on a picture of the nuclear power plant valve flange screw hole 102 shot by the camera, a plane rectangular coordinate system is established by taking the center of the positive camera 5513 as an origin, the coordinates of the center of the nuclear power plant valve flange screw hole 102 are extracted and calculated, then the image processing device in the industrial personal computer can automatically adjust the positions of the Y-direction moving mechanism 10, the X-direction moving mechanism 20 and the rotating mechanism 30 according to the coordinates to adjust the position of the detecting machine head 551, when the X and Y coordinates of the center of the nuclear power plant valve flange screw hole 102 are 0, the position of the slide block of the Y-direction linear module of the Y-direction moving mechanism 10 is adjusted so that the detecting machine head 551 is inserted into the nuclear power plant valve flange screw hole 102, when the limit switch 5515/travel switch action on the detecting machine head 551 is performed, the positioning is completed, the detecting machine head 551 is moved out from the nuclear power plant valve flange screw hole 102, and then the multistation mounting frame 54 is rotated by 360/n degrees (n is the number of stations) to the coaxial station positions of the nuclear power plant valve flange screw hole 102 after each station is equal to the center line of the central axis of the second fixing plate 542.

Rotating the multi-station mounting frame 54 to enable the cleaning machine head 552 to move to the position above the nuclear power plant valve flange screw hole 102, inserting the cleaning machine head 552 into the nuclear power plant valve flange screw hole 102, firstly enabling the cleaning machine head 552 to spray cleaning agents, starting the first driving piece 5521 to drive the hairbrush 5522 to rotate, then controlling the Y-direction linear module to enable the cleaning machine head 552 to move up and down, enabling the cleaning agents to be fully mixed with oil stains in the process, then spraying clear water to the thread surface to clean the mixture of the cleaning agents and the oil stains, finally stopping the first driving piece 5521, opening the absorption system, completely sucking out waste liquid in threads through the suction head 5523, and finally removing the cleaning machine head 552 from the nuclear power plant valve flange screw hole 102;

Rotating the multi-station mounting frame 54 to enable the drying machine head 553 to move above the nuclear power plant valve flange screw hole 102 cleaned in the previous step, then inserting the drying cylinder 5532 into the nuclear power plant valve flange screw hole 102, starting an air supply device, thoroughly drying water marks left in the nuclear power plant valve flange screw hole 102 by hot air through the drying cylinder 5532, and then removing the drying cylinder 5532 from the nuclear power plant valve flange screw hole 102;

Rotating the multi-station mounting frame 54 to enable the polishing head 554 to move above the nuclear power plant valve flange screw hole 102 after drying in the previous step, inserting the polishing brush 5542 into the nuclear power plant valve flange screw hole 102, starting the third driving piece 5541 and the absorption system, enabling the third driving piece 5541 to drive the polishing brush 5542 to rotate at a high speed through a speed reducer, controlling the Y-direction linear module to drive the polishing head 554 to move up and down repeatedly by the controller, enabling the polishing brush 5542 to remove rust on the inner wall surface of the threaded hole, and sucking dust generated in the polishing process through the dust suction head 5543 by the absorption system;

Rotating the multi-station mounting frame 54 to enable the detection machine head 551 to move to the position above the nuclear power plant valve flange screw hole 102 polished in the previous step, inserting the detection machine head 551 into the nuclear power plant valve flange screw hole 102, observing the condition of the repaired threaded surface through the side camera 5514, judging whether the repair is finished, and repeating the process to repair the next nuclear power plant valve flange screw hole 102 if the repair is finished.

When the nuclear power plant valve flange screw hole overhauling device repairs the nuclear power plant valve flange screw hole 102, oil stains and rust on the surface of the screw thread can be cleaned on the premise of not damaging the screw hole body through three working procedures of cleaning, drying and polishing, the phenomenon of seizure after the bolt is screwed into the screw hole can be effectively prevented, the service life of a nuclear power plant valve flange (flange in a nuclear power plant valve) is prolonged, and the overhauling period is shortened;

According to the nuclear power plant valve flange screw hole overhauling device, a field picture is transmitted to a display screen of an industrial personal computer or other intelligent platforms by using a camera, position adjustment is carried out on different heads of the repairing head 55 according to the far end of the picture, the repairing condition of a screw hole is checked, and the time of an operator staying on the field is reduced, so that the irradiation receiving quantity is greatly reduced.

The detection machine head 551, the cleaning machine head 552, the drying machine head 553 and the polishing machine head 554 of the nuclear power plant valve flange screw hole overhauling device are all detachable, and the machine head matched with the detection machine head 551, the cleaning machine head 552, the drying machine head 553 and the polishing machine head 554 can be selected according to the size of the threaded hole, so that the nuclear power plant valve flange screw hole overhauling device can be suitable for cleaning flange screw holes with various specifications.

It is to be understood that the above examples only represent preferred embodiments of the present invention, which are described in more detail and are not to be construed as limiting the scope of the invention; it should be noted that, for a person skilled in the art, the above technical features can be freely combined, and several variations and modifications can be made without departing from the scope of the invention; therefore, all changes and modifications that come within the meaning and range of equivalency of the claims are to be embraced within their scope.

Claims (15)

1. The overhaul device for the flange screw hole of the valve of the nuclear power plant is characterized by comprising a Y-direction moving mechanism (10), an X-direction moving mechanism (20), a rotating mechanism (30), a tensioning mechanism (40) and an executing mechanism (50);

The Y-direction moving mechanism (10), the X-direction moving mechanism (20) and the rotating mechanism (30) are mutually connected, the tensioning mechanism is connected with the Y-direction moving mechanism (10), and the executing mechanism is connected with the X-direction moving mechanism (20);

the actuating mechanism comprises a repairing machine head for overhauling the flange screw hole of the valve of the nuclear power plant.

2. The nuclear power plant valve flange screw hole overhauling device according to claim 1, wherein the Y-direction moving mechanism (10) comprises a first bracket (11) and a Y-direction moving assembly (12) arranged on the first bracket (11), the X-direction moving mechanism (20) comprises a second bracket (21) and an X-direction moving assembly (22) arranged on the second bracket (21), and the second bracket (21) is connected with the Y-direction moving assembly (22);

The rotary mechanism (30) is connected with the first bracket (11) to drive the first bracket (11) to rotate along the circumferential direction, the tensioning mechanism (40) is connected with the first bracket (11), and the tensioning mechanism (40) is used for being fixed in a hole in the middle of the valve flange (100) of the nuclear power plant.

3. The nuclear power plant valve flange screw hole overhauling device according to claim 2, wherein the first bracket (11) comprises a first bottom plate (111) and a first mounting plate (112) vertically connected with the first bottom plate (111), the Y-direction moving assembly (22) comprises a Y-direction linear module, the first bottom plate (111) is connected with the rotating mechanism (30), and the Y-direction linear module is mounted on the first mounting plate (112);

the second bracket (21) comprises a second bottom plate (211) and a second mounting plate (212) vertically connected with the second bottom plate (211), the X-direction moving assembly (12) comprises an X-direction linear module, and the second bottom plate (211) is connected with a sliding block of the Y-direction linear module; the X-direction linear module is arranged on the second mounting plate (212), and the executing mechanism is connected with the X-direction linear module.

4. The nuclear power plant valve flange screw hole overhauling device of claim 3, wherein the rotating mechanism comprises a rotating platform, and the rotating platform is connected with the first bottom plate to drive the first bracket to circumferentially rotate.

5. The overhauling device for a flange screw hole of a valve flange of a nuclear power plant according to claim 4, wherein the tensioning mechanism (40) comprises a fixed body (41), a tensioning block (42), a connecting rod (43) and an operating piece (44), the connecting rod (43) is arranged on the first bottom plate (111) in a penetrating mode, the upper end of the connecting rod (43) is connected with the operating piece (44), and a cone (45) is arranged at the lower end of the connecting rod (43);

The fixing body (41) is provided with a containing groove (411), a plurality of through holes (412) are formed in the circumferential side face of the fixing body (41), the tensioning block (42) is movably installed in the through holes (412), the cone (45) is installed in the containing groove (411) to drive the tensioning block (42) to move along the through holes (412), and the fixing body (41) is fixed in the hole in the middle of the nuclear power plant valve flange (100).

6. The nuclear power plant valve flange screw hole overhauling device according to claim 5, wherein the actuating mechanism (50) further comprises a third mounting plate (51), a hollow rotating platform (52), a buffer assembly (53), a multi-station mounting frame (54) and a repairing machine head (55);

The hollow rotating platform (52) is connected with the sliding block of the X-direction linear module through the third mounting plate (51), the hollow rotating platform (52) is connected with the buffer assembly (53), the buffer assembly (53) is connected with the multi-station mounting frame (54), and the repairing machine head (55) is connected with the multi-station mounting frame (54).

7. The nuclear power plant valve flange screw hole inspection apparatus as claimed in claim 6, wherein the buffer assembly (53) comprises a base plate (531), a guide shaft (532), and an elastic member (533);

The multi-station mounting frame (54) comprises a first fixing plate (541), a second fixing plate (542) and a connecting plate (543); the first fixing plate (541) and the second fixing plate (542) are arranged in parallel at intervals, and the connecting plate (543) is connected with the first fixing plate (541) and the second fixing plate (542);

The base plate (531) is located above the first fixing plate (541), the upper end of the guide shaft (532) is connected with the base plate (531), the lower end of the guide shaft (532) is connected with the first fixing plate (541) and is relatively fixed, and the elastic piece (533) is arranged between the base plate (531) and the first fixing plate (541);

the prosthetic handpiece (55) is connected to the second fixing plate (542).

8. The nuclear power plant valve flange screw hole inspection apparatus according to claim 7, wherein the number of the guide shafts (532) is plural, and the plurality of the guide shafts (532) are arranged at intervals along the center of the base plate (531);

the elastic member (533) includes a coil spring that is fitted around a portion of the guide shaft (532) between the base plate (531) and the first fixing plate (541).

9. The nuclear power plant valve flange screw hole overhauling device according to claim 7, wherein the repairing machine head (55) comprises a detecting machine head (551), the detecting machine head (551) comprises a mounting rod (5511), the upper end of the mounting rod (5511) is connected with the second fixing plate (542), and a positioning block (5512) is arranged at the lower end of the mounting rod (5511);

The positioning block (5512) comprises a columnar portion (55121) and a conical portion (55122), the upper end of the columnar portion (55121) is connected with the lower end of the mounting rod (5511), the upper end of the conical portion (55122) is connected with the lower end of the columnar portion (55121), a positive camera (5513) is arranged at the bottom of the conical portion (55122), and a plurality of side cameras (5514) are arranged in the circumferential direction of the conical portion (55122); a limit switch (5515) is arranged on the circumferential side surface of the columnar part (55121).

10. The nuclear power plant valve flange screw hole inspection device according to claim 9, wherein the circumferential side surface of the columnar portion (55121) has a mounting plane, and the limit switch (5515) is mounted on the mounting plane.

11. The nuclear power plant valve flange screw hole inspection apparatus as claimed in claim 7, wherein the repair head (55) further comprises a cleaning head (552);

The cleaning machine head (552) comprises a first driving piece (5521), a brush (5522) and a water suction head (5523), wherein the brush (5522) comprises a hollow brush rod (55221) and a brush head (55222) provided with the brush rod (55221), the upper end of the brush rod (55221) is connected with the first driving piece (5521), the other end of the brush rod (55221) is connected with the water suction head (5523), and a plurality of circles of water spray holes (55223) are uniformly formed in the wall surface of the brush rod (55221) along the axial direction and are used for spraying cleaning media to the inner surface of a flange screw hole of a valve of a nuclear power plant;

an absorption pipeline connected with the suction head (5523) is further arranged inside the hairbrush rod (55221).

12. The nuclear power plant valve flange screw hole inspection apparatus as claimed in claim 7, wherein the repair head (55) further comprises a dryer head (553);

the dryer head (553) comprises a second driving piece (5531) and a dryer cylinder (5532), wherein the upper end of the dryer cylinder (5532) is connected with the second driving piece (5531), and a plurality of air outlets (55321) are uniformly formed in the circumferential wall surface and the bottom of the dryer cylinder (5532).

13. The nuclear power plant valve flange screw hole inspection apparatus as claimed in claim 7, wherein the repair head (55) further comprises a polisher head (554);

The polishing machine head (554) comprises a third driving piece (5541), a polishing brush (5542) and a dust collection head (5543), the polishing brush (5542) comprises a hollow polishing brush rod (55421) and polishing brush heads (55422) arranged on the polishing brush rod (55421), the upper end of the polishing brush rod (55421) is connected with the third driving piece (5541), the other end of the polishing brush rod (55421) is connected with the dust collection head (5543), and an absorption pipeline connected with the dust collection head (5543) is further arranged inside the polishing brush rod (55421).

14. The overhauling device for the flange screw hole of the valve flange of the nuclear power plant according to any one of claims 9 to 13, wherein a plurality of mounting holes are formed in the second fixing plate, the plurality of mounting holes are uniformly distributed on a circle taking the center of the second fixing plate as a circle center, and each mounting hole is connected with a corresponding repairing machine head (55).

15. The nuclear power plant valve flange screw hole inspection device according to claim 14, further comprising an industrial personal computer connected to the Y-direction moving mechanism (10), the X-direction moving mechanism (20), the rotating mechanism (30) and the executing mechanism (50).