CN117686520A - Nuclear power station coolant pump detection device - Google Patents
Nuclear power station coolant pump detection device Download PDFInfo
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- CN117686520A CN117686520A CN202311717330.8A CN202311717330A CN117686520A CN 117686520 A CN117686520 A CN 117686520A CN 202311717330 A CN202311717330 A CN 202311717330A CN 117686520 A CN117686520 A CN 117686520A
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- 238000001514 detection method Methods 0.000 title claims abstract description 41
- 239000002826 coolant Substances 0.000 title claims abstract description 28
- 230000007246 mechanism Effects 0.000 claims abstract description 46
- 230000007704 transition Effects 0.000 claims description 40
- 238000009434 installation Methods 0.000 claims 1
- 238000007689 inspection Methods 0.000 description 74
- 238000003466 welding Methods 0.000 description 15
- 229910000831 Steel Inorganic materials 0.000 description 11
- 239000010959 steel Substances 0.000 description 11
- 238000000034 method Methods 0.000 description 8
- 230000008569 process Effects 0.000 description 8
- 230000009471 action Effects 0.000 description 7
- 230000005484 gravity Effects 0.000 description 6
- 230000008602 contraction Effects 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 2
- 230000007547 defect Effects 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 230000006698 induction Effects 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000000149 penetrating effect Effects 0.000 description 1
- 229910001220 stainless steel Inorganic materials 0.000 description 1
- 239000010935 stainless steel Substances 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
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Abstract
The invention discloses a detection device for a coolant pump of a nuclear power plant, which relates to the technical field of internal detection of coolant pumps for nuclear power equipment, and comprises a mounting ring, a swivel, an electric lifting assembly, a gear driving mechanism and a detection rod, wherein connecting lugs are arranged on two sides of the mounting ring; the swivel is rotatably arranged on the mounting ring; the gear driving mechanism is connected with the inner ring of the mounting ring, and the driving end of the gear driving mechanism is connected with the rotating ring in a matched manner; the electric lifting assembly is arranged on the swivel, and a lifting connecting plate is arranged on the electric lifting assembly; the detection rod penetrates through the lifting connecting plate. When shooting and checking the positions of upper and lower weld joints in the cavity between two adjacent guide vanes, the electric telescopic rod is controlled to stretch for one time, and when the electric telescopic rod stretches, the electric telescopic rod pushes against the linkage vertical plate connected with the checking rod to drive the linkage vertical plate to drive the checking rod to deflect, so that the checking end at the bottom of the checking rod can be conveniently turned into the checking point to carry out shooting and checking.
Description
Technical Field
The invention relates to the technical field of detection of the interior of a coolant pump for nuclear power equipment, in particular to a detection device of the coolant pump of a nuclear power station.
Background
In general, a reactor of a nuclear power plant uses a coolant pump to make a coolant form a forced circulation, so that heat energy generated in the reactor is transferred, and whether a metal surface state in a volute of the coolant pump has defects relates to safe operation of nuclear equipment, so that the metal surface in a pump shell needs to be detected, and particularly, the positions of connecting welding seams of guide vanes in the pump shell and an upper guide tray and a lower guide tray are needed.
The guide vane inside the existing coolant pump shell for the nuclear power station is circumferentially distributed for one circle, so that a plurality of points to be detected exist, when the detection is generally carried out, a shooting detection tool is manually held to enter the pump shell, then shooting operation is carried out on each point one by one, and then whether a weld joint at the upper side and the lower side of the guide vane inside the pump shell is problematic is judged through a shot image.
The existing coolant pump for nuclear power equipment has the following defects: in the existing detection operation process, the manual handheld shooting equipment is used for shooting the positions of each welding seam of the guide vane in the pump shell, so that the detection efficiency is low, the labor intensity is high, and the welding seam of the guide vane in the pump body and the upper and lower guide trays is spirally deep into the back, so that the space is narrow, the handheld detection equipment is difficult to enter a channel, the detection blind area is easy to appear, the detection effect is not good enough, and the operation is not convenient enough.
Disclosure of Invention
The invention aims to provide a detection device for a coolant pump of a nuclear power plant, which is used for solving the technical problem that the upper and lower weld positions of guide vanes in the coolant pump for the nuclear power equipment are inconvenient to check in the prior art.
The technical problems to be solved by the invention can be realized by the following technical scheme:
a nuclear power plant coolant pump detection apparatus, comprising:
the mounting ring is provided with connecting lugs on two sides;
the swivel is rotatably arranged on the mounting ring;
the gear driving mechanism is connected with the inner ring of the mounting ring, and the driving end of the gear driving mechanism is connected with the rotating ring in a matched manner;
the electric lifting assembly is arranged on the swivel and is provided with a lifting connecting plate;
the detection rod penetrates through the lifting connecting plate; the lifting connecting plate is provided with a guide mechanism, the top of the detection rod is in running fit with the guide mechanism, the top of the detection rod is provided with a coil spring, and one side of the detection rod is provided with a linkage vertical plate;
the electric telescopic rod is horizontally connected to one side of the lifting connecting plate, and the telescopic end of the electric telescopic rod is matched with the linkage vertical plate;
and the supporting plate assembly is arranged on the lifting connecting plate and is matched with the linkage vertical plate.
As a further scheme of the invention: the support plate assembly comprises a main support plate, a transition support plate and a reset top plate mechanism, wherein the main support plate is connected to one side, close to the electric telescopic rod, of the lifting connecting plate, the linkage vertical plate is matched with the main support plate, the edge position of the front end of the main support plate is connected with a guide sleeve, the transition support plate is inserted in the guide sleeve in a sliding mode, the transition support plate is flush with the main support plate, a connecting spring is connected between the transition support plate and the guide sleeve, one end, far away from the detecting rod, of the transition support plate is connected with a linkage baffle aligned with the telescopic end of the electric telescopic rod, the reset top plate mechanism is arranged on one side of the front end of the main support plate, and the reset top plate mechanism is matched and connected with the telescopic end of the electric telescopic rod.
As a further scheme of the invention: the resetting top plate mechanism comprises a connecting guide rail and a lifting supporting plate, wherein the connecting guide rail is connected to the lower side of the front end of the main supporting plate, the lifting supporting plate is slidably connected to the connecting guide rail, and a traction mechanism is connected between the lifting supporting plate and the telescopic end of the electric telescopic rod.
As a further scheme of the invention: the traction mechanism comprises a traction steel wire and a guide ball, one end of the traction steel wire is connected with the telescopic end of the electric telescopic rod, the guide ball is connected to the front end of the main supporting plate, and the traction steel wire penetrates through the guide ball.
As a further scheme of the invention: the gear driving mechanism comprises a stepping motor, a mounting seat, a driving gear and an internal gear ring, wherein the mounting seat is connected to the inner ring of the mounting ring, the stepping motor is connected to the mounting seat, the driving gear is connected to the spindle end of the stepping motor, the internal gear ring is arranged on the inner ring of the rotating ring, and the internal gear ring is meshed with the driving gear.
As a further scheme of the invention: the bottom circumference of swivel is distributed with a plurality of gyro wheels, the inner circle upside border of collar is provided with the bulge loop, and the gyro wheel cooperation is in the bulge loop outside.
As a further scheme of the invention: the electric lifting assembly comprises a base, a fixing seat, a limiting guide rod, a servo motor and an adjusting screw, wherein the base is arranged on a swivel, the limiting guide rod is connected to the base and penetrates through a lifting connecting plate, the fixing seat is connected to the top of the limiting guide rod, the servo motor is arranged on the fixing seat, the adjusting screw is rotationally connected between the fixing seat and the base, the top rotating end of the adjusting screw is connected with a main shaft of the servo motor, the adjusting screw penetrates through the lifting connecting plate, and the adjusting screw is in threaded connection with the lifting connecting plate.
As a further scheme of the invention: the guide mechanism comprises a connecting block and a lifting slide rod, the lifting slide rod penetrates through the lifting connecting plate, the connecting block is fixedly connected to the top of the lifting slide rod, the top of the detection rod is rotationally connected with the connecting block, and the coil spring is connected between the top of the detection rod and the connecting block in a matched mode.
The invention has the beneficial effects that:
1. according to the invention, when the positions of upper and lower welding lines of guide vanes distributed in the coolant pump shell are inspected, the mounting ring is fixed on the pump shell, the inspection rod is inserted in the pump shell, the inspection camera is arranged at the circular arc end of the bottom of the inspection rod, when the positions of the upper and lower welding lines in the cavity between two adjacent guide vanes are inspected by shooting, the electric telescopic rod is only required to be controlled to stretch once, the electric telescopic rod is pushed to act on the linkage vertical plate connected with the inspection rod when being stretched, the linkage vertical plate is driven to deflect, so that the inspection end of the bottom of the inspection rod is conveniently turned into the inspection point, the position of the upper welding line is inspected by shooting, the deflected linkage vertical plate is positioned on the transition supporting plate, the elongated electric telescopic rod is pushed to move the transition supporting plate, the transition supporting plate is promoted to be pulled away from the bottom of the linkage vertical plate, the inspection rod is driven to descend under the action of gravity, the position of the lower welding line is conveniently inspected, and the shooting inspection of the upper and lower welding lines in a narrow space between the adjacent guide vanes is conveniently realized.
2. When the electric telescopic rod stretches, the traction steel wire connected between the electric telescopic rod and the lifting supporting plate is loosened, the lifting supporting plate conveniently descends along the connecting guide rail under the action of gravity, when the electric telescopic rod stretches, the electric telescopic rod pushes the linkage vertical plate to deflect to the transition supporting plate and is positioned above the lifting supporting plate, after the linkage vertical plate descends, the electric telescopic rod is matched with the lifting supporting plate, when the electric telescopic rod contracts, the electric telescopic rod pulls the lifting supporting plate to lift up through the traction steel wire, so that the linkage vertical plate is jacked up, the lifted linkage vertical plate drives the inspection rod to lift up synchronously, and when the inspection rod is lifted to the height position of the main supporting plate, the inspection rod is reset by the return force of the coil spring due to no shielding, so that automatic reset is realized after the electric telescopic rod contracts, and the next point inspection is conveniently and directly carried out.
3. According to the invention, the stepping motor acts on the gear ring through the driving gear, so that the rotating ring rotates on the mounting ring in a stepping manner, and after each time the rotating ring rotates for a certain angle, the checking rod is just stopped at one checking point, so that the checking of the point is facilitated, and the continuous movement is facilitated, and all points in the pump shell are conveniently checked.
Drawings
The invention is further described below with reference to the accompanying drawings.
FIG. 1 is a schematic view of the overall structure of the present invention;
FIG. 2 is an enlarged schematic view of the structure of FIG. 1 at A;
FIG. 3 is an enlarged schematic view of the structure at B in FIG. 1;
FIG. 4 is a schematic top view of the relative position distribution of the linkage riser, the electric telescopic rod and the transition pallet in the present invention;
FIG. 5 is a schematic view of a partial structure of an electric telescopic rod in the invention, which is connected with a lifting supporting plate in a matched way through a traction steel wire;
FIG. 6 is a schematic top view of the electric telescopic rod of the present invention after deflection of the extension push linkage riser;
FIG. 7 is a schematic diagram of the right side view of the invention after the ganged risers and sense bars are lowered relative to the main pallet;
FIG. 8 is a schematic view of the configuration of the mounting ring and roller of the present invention;
FIG. 9 is a schematic view showing a structure in which a detection rod is mounted on a pump housing through a mounting ring in the present invention;
FIG. 10 is a schematic top view of the present invention with the detector bars rotated into between adjacent vanes.
In the figure: 1. a mounting ring; 2. a connecting lug; 3. a swivel; 4. an inner gear ring; 5. a detection rod; 6. adjusting a screw; 7. a limit guide rod; 8. a servo motor; 9. a mounting base; 10. a drive gear; 11. a stepping motor; 12. a main pallet; 13. a linkage baffle; 14. guide sleeve; 15. a connecting spring; 16. a transition pallet; 17. lifting the supporting plate; 18. a connecting guide rail; 19. a linkage vertical plate; 20. an electric telescopic rod; 21. lifting the connecting plate; 22. lifting the slide bar; 23. a connecting block; 24. traction steel wire; 25. a guide ball; 26. a convex ring; 27. a roller; 28. a fixing seat; 29. a pump housing; 30. a guide vane; 31. a coil spring; 32. and (5) a base.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
1-10, a nuclear power plant coolant pump detection device is used for checking a main coolant pump of a nuclear power plant reactor, wherein the checking position is that guide vanes 30 circumferentially distributed in a pump shell 29 are welded with upper and lower guide trays; the device comprises a mounting ring 1, a swivel 3, a gear driving mechanism, an electric lifting assembly, an inspection rod 5, an electric telescopic rod 20 and a supporting plate assembly;
the two sides of the mounting ring 1 are provided with the connecting lugs 2, as shown in fig. 9, the mounting ring 1 is customized according to the corresponding dimension of the coolant pump to be inspected, and the connecting lugs 2 and bolts at the port of the pump shell 29 of the coolant pump to be inspected can be assembled and fixed together, so that the whole device can be positioned and fixed conveniently during inspection;
the rotating ring 3 is rotatably arranged on the mounting ring 1, the gear driving mechanism is connected with the inner ring of the mounting ring 1, the driving end of the gear driving mechanism is connected with the rotating ring 3 in a matched manner, and the gear driving mechanism drives the rotating ring 3 to rotate in a stepping manner, so that the guide vanes 30 distributed in the circumferential direction inside the pump shell 29 can be conveniently stopped at different points, and the guide vanes can be conveniently inspected one by one;
the electric lifting assembly is arranged on the swivel 3, the electric lifting assembly is provided with a lifting connecting plate 21, and the lifting connecting plate 21 can perform lifting movement according to control requirements;
the inspection rod 5 penetrates through the lifting connection plate 21, the inspection rod 5 can rotate and slide up and down relative to the lifting connection plate 21, the inspection rod 5 is a hollow stainless steel tube, a video transmission cable is arranged inside the inspection rod 5 in a penetrating mode, an endoscopic camera is arranged at the bottom of the inspection rod 5 and is connected with a control display terminal through the video transmission cable, the bottom of the inspection rod 5 is bent into an arc shape, the size of the arc-shaped end is matched with the size of a space between adjacent guide vanes 30 inside a pump shell 29, when the inspection rod 5 is fixed on the pump shell 29 along with a mounting ring 1, the inspection rod 5 is enabled to descend to a corresponding position inside the pump shell 29 by means of an electric lifting assembly, when a welding line is connected in a cavity between two adjacent guide vanes 30 at the corresponding position in an inspection mode, the inspection rod 5 is enabled to rotate, the arc-shaped end of the bottom of the inspection rod is enabled to be carried with the endoscopic camera to be turned into the cavity between the two guide vanes 30, the inner surface welding line can be shot conveniently, and the inspection rod 5 can move up and down, the upper side position and the lower side position can be shot conveniently;
the lifting connecting plate 21 is provided with a guide mechanism, the top of the checking rod 5 is in running fit with the guide mechanism, the top of the checking rod 5 is provided with a coil spring 31, one side of the checking rod 5 is provided with a linkage vertical plate 19, the top of the linkage vertical plate 19 is connected with the checking rod 5 through a convex rod body, the movement range of the linkage vertical plate 19 is positioned at the outer side of the lifting connecting plate 21, and the linkage vertical plate 19 can descend for a certain distance along with the checking rod 5;
the electric telescopic rod 20 is horizontally connected to one side of the lifting connecting plate 21, the telescopic end of the electric telescopic rod 20 is matched with the linkage vertical plate 19, and when the inspection rod 5 is in the initial position, the telescopic end of the electric telescopic rod 20 is vertical to the linkage vertical plate 19 and aligned with the bottom position of the linkage vertical plate 19; when the gear driving mechanism drives the swivel 3 to rotate to the corresponding position to stop, the electric telescopic rod 20 stretches once, and in order to facilitate the swivel 3 to rotate to one point to stop, the electric telescopic rod 20 runs once, a plurality of travel switches are circumferentially distributed on the end face of the mounting ring 1, each travel switch corresponds to one inspection point, the travel switches are electrically connected with the electric telescopic rod 20, the electric telescopic rod 20 is provided with a telescopic controller, when the telescopic controller receives a signal of the travel switch, the electric telescopic rod 20 is controlled to stretch, when the electric telescopic rod 20 stretches, the telescopic end of the electric telescopic rod pushes against the linkage vertical plate 19, the linkage vertical plate 19 deflects due to the pushing action, so that the inspection rod 5 is driven to deflect, as shown in fig. 10, the arc end at the bottom of the inspection rod 5 is conveniently rotated to enter the upper side position of a cavity between two guide vanes 30 corresponding to shoot the welding line at the upper side position; and in the process, the coil spring 31 at the top rotating end of the inspection rod 5 is tightened to generate a resilience force;
as shown in fig. 4, the pallet assembly is disposed on the lifting connection plate 21 and the pallet assembly is mated with the linking riser 19.
In some embodiments, the pallet assembly comprises a main pallet 12, a transition pallet 16 and a reset top plate mechanism, the main pallet 12 is connected to one side of a lifting connecting plate 21 close to an electric telescopic rod 20, and a linkage riser 19 is matched on the main pallet 12, and the main pallet 12 plays a role in supporting the linkage riser 19 in an initial position; the bottom of the linkage vertical plate 19 can slide relatively to the main supporting plate 12, the guide sleeve 14 is connected to the edge of the front end of the main supporting plate 12, the transition supporting plate 16 is inserted in the guide sleeve 14 in a sliding manner, the transition supporting plate 16 is flush with the main supporting plate 12, a connecting spring 15 is connected between the transition supporting plate 16 and the guide sleeve 14, one end of the transition supporting plate 16, which is far away from the checking rod 5, is connected with the linkage baffle 13 aligned with the telescopic end of the electric telescopic rod 20, the linkage baffle 13 is mutually perpendicular to the transition supporting plate 16, the reset top plate mechanism is arranged on one side of the front end of the main supporting plate 12, and the reset top plate mechanism is connected with the telescopic end of the electric telescopic rod 20 in a matched manner;
as shown in fig. 6, when the electric telescopic rod 20 stretches, it pushes the linkage riser 19 to drive the inspection rod 5 to deflect, and when the telescopic end of the electric telescopic rod 20 breaks away from the end face of the linkage riser 19 during stretching, the linkage riser 19 just deflects to the outside of the front end edge of the main pallet 12 and is supported on the transition pallet 16, and at the moment, the corresponding height position is kept, and at the moment, the inspection rod 5 is deflected by the linkage riser 19, the inspection head at the bottom of the inspection rod 5 deflects to the upper side of the inspection positioning position, and the upper end face of the transition pallet 16 is provided with a first pressure sensor for starting the camera at the bottom of the inspection rod 5, after the linkage riser 19 rotates to the upper side of the transition pallet 16, the first pressure sensor generates induction, so that the camera at the bottom of the inspection rod 5 starts shooting the upper position weld of the inspection point, and when the electric telescopic rod 20 pushes the linkage riser 19 to the transition pallet 16, the electric telescopic rod 20 continues to extend, then the telescopic end of the electric telescopic rod 20 pushes against the linkage baffle 13, the linkage baffle 13 drives the transition support plate 16 to slide and gradually withdraws from the bottom of the linkage riser 19, in the process, the connecting spring 15 stretches to generate a rebound force, before the complete withdrawal, the linkage riser 19 stays at a corresponding height for a period of time, the fixed-point shooting is convenient to be carried out, when the transition support plate 16 is completely withdrawn from the bottom of the linkage riser 19, the telescopic end of the electric telescopic rod 20 is blocked in the reset direction of the linkage riser 19, so that the electric telescopic rod cannot rotate and reset, then the bottom loses support, the linkage riser 19 and the check rod 5 descend for a certain distance due to the action of gravity, and the lifting connecting plate 21 is distributed with a second pressure sensor for starting the camera at the bottom of the check rod 5, when the inspection rod 5 descends, the guiding mechanism can act on the second pressure sensor, so that the camera at the bottom of the inspection rod 5 starts to shoot a welding line at the lower side of the inspection point, then the electric telescopic rod 20 contracts, the electric telescopic rod 20 is linked with the reset top plate mechanism to lift in the contraction process of the telescopic end, the reset top plate mechanism is positioned below the linkage vertical plate 19, the linkage vertical plate 19 is pushed to lift, the linkage vertical plate 19 drives the inspection rod 5 to lift, when the linkage vertical plate 19 lifts to the height of the upper end face of the main supporting plate 12, the telescopic end of the electric telescopic rod 20 contracts to be separated from the linkage vertical plate 19, the electric telescopic rod 20 is in an unobstructed function, and the inspection rod 5 is rotated and reset by virtue of the resilience force released by the coil spring 31, so that the next point inspection is convenient.
In some embodiments, in order to facilitate the lifting linkage of the reset roof mechanism along with the expansion and contraction of the electric telescopic rod 20, the reset roof mechanism comprises a connecting guide rail 18 and a lifting support plate 17, wherein the connecting guide rail 18 is connected to the lower side of the front end of the main support plate 12 and is positioned on one side close to the lifting connection plate 21, the lifting support plate 17 is slidably connected to the connecting guide rail 18, a traction mechanism is connected between the lifting support plate 17 and the expansion and contraction end of the electric telescopic rod 20, and when the electric telescopic rod 20 is in a contracted state, the electric telescopic rod 20 relies on the traction mechanism to enable the lifting support plate 17 to be positioned at the top of the connecting guide rail 18, and at the moment, the lifting support plate 17 is flush with the main support plate 12 and spliced with the transition support plate 16.
In some embodiments, to facilitate the linkage of the electric telescopic rod 20 to the lifting pallet 17, the traction mechanism comprises a traction wire 24 and a guide ball 25, one end of the traction wire 24 is connected with the telescopic end of the electric telescopic rod 20, and to facilitate the end connection of the traction wire 24, the telescopic end of the electric telescopic rod 20 is provided with a convex plate, the other end of the traction wire 24 is connected with the lifting pallet 17, the guide ball 25 is connected at the front end of the main pallet 12, and the traction wire 24 penetrates the guide ball 25, the guide ball 25 facilitates the steering of the traction wire 24, when the electric telescopic rod 20 is extended, as the telescopic end of the electric telescopic rod 20 moves forward, i.e. moves towards the direction in which the traction wire 24 is located, the traction wire 24 is loosened, the lifting pallet 17 slides down along the connecting guide rail 18 by gravity, when the linkage riser 19 is turned over the transition riser 16, the linkage riser 19 is lowered to a corresponding position, so that when the transition riser 16 is transversely pulled away from the bottom of the transition riser 19, the convenience linkage riser 19 is lowered along the inspection rod 5, and when the electric telescopic rod 20 is contracted, the traction wire 24 is pulled by the traction wire 24, the traction wire 17 is pulled upwards by the guide ball 25, the lifting the linkage riser 17 is pulled upwards, so that the lifting pallet 17 slides upwards along the connecting guide rail 17, and the lifting riser 17 is reset.
In some embodiments, in order to facilitate the stepwise rotation of the swivel 3 along the mounting ring 1, the gear driving mechanism comprises a stepping motor 11, a mounting seat 9, a driving gear 10 and an internal gear ring 4, wherein the mounting seat 9 is connected to the inner ring of the mounting ring 1, the stepping motor 11 is connected to the mounting seat 9, the spindle of the stepping motor 11 is vertically downward, the driving gear 10 is connected to the spindle end of the stepping motor 11, the internal gear ring 4 is arranged on the inner ring of the swivel 3, and the internal gear ring 4 is meshed with the driving gear 10;
the stepping motor 11 is provided with a motor controller and an absolute value encoder, the absolute value encoder sets the feeding amount of the stepping motor 11 each time, the fact that the stepping motor 11 acts on the inner gear ring 4 through the driving gear 10 each time is ensured, after the swivel 3 rotates by a certain angle, the inspection rod 5 just stops at an inspection point, the stepping motor 11 is controlled to automatically run repeatedly by means of the motor controller, the intermittent time of two adjacent feeding movements just extends and contracts once for the electric telescopic rod 20, and the inspection rod 5 finishes inspection when the swivel 3 stops.
In some embodiments, in order to facilitate disassembly and assembly of the swivel 3 and the mounting ring 1, a plurality of rollers 27 are circumferentially distributed at the bottom of the swivel 3, a convex ring 26 is arranged at the upper side edge of the inner ring of the mounting ring 1, the rollers 27 are matched with the convex ring 26 to be positioned outside the convex ring 26, and the rollers 27 abut against the outer wall of the convex ring 26 to roll, so that the swivel 3 is convenient to rotate, and meanwhile, the swivel 3 is convenient to disassemble from the mounting ring 1.
In some embodiments, the electric lifting assembly comprises a base 32, a fixed seat 28, a limit guide rod 7, a servo motor 8 and an adjusting screw 6, wherein the base 32 is arranged on the swivel 3, the limit guide rod 7 is vertically connected on the base 32, the limit guide rod 7 penetrates through the lifting connecting plate 21, the lifting connecting plate 21 can slide up and down along the limit guide rod 7, the fixed seat 28 is connected at the top of the limit guide rod 7, the servo motor 8 is arranged on the fixed seat 28, the main shaft end of the servo motor 8 is vertically downward, the adjusting screw 6 is rotatably connected between the fixed seat 28 and the base 32, the rotating end at the top of the adjusting screw 6 is connected with the main shaft of the servo motor 8, the adjusting screw 6 penetrates through the lifting connecting plate 21, and the adjusting screw 6 is in threaded connection with the lifting connecting plate 21;
after the inspection device is mounted on the pump shell 29, the servo motor 8 is started, the servo motor 8 drives the adjusting screw rod 6 to rotate, and the adjusting screw rod 6 is in threaded connection with the lifting connecting plate 21, and the lifting connecting plate 21 is limited by the limiting guide rod 7, so that the lifting connecting plate 21 can only lift in the rotating process of the adjusting screw rod 6.
In some embodiments, the guiding mechanism comprises a connecting block 23 and a lifting slide bar 22, the lifting slide bar 22 penetrates through the lifting connecting plate 21, the connecting block 23 is fixedly connected to the top of the lifting slide bar 22, the top of the checking rod 5 is rotatably connected with the connecting block 23, a coil spring 31 is cooperatively connected between the top of the checking rod 5 and the connecting block 23, the lifting slide bar 22 is used for limiting the rotation of the connecting block 23 and preventing the same from rotating along with the checking rod 5, and the coil spring 31 generates a rebound force when the checking rod 5 rotates.
It should be noted that, in order to facilitate the transportation of the whole inspection device, the inspection device can be split into several parts, wherein the inspection rod 5 and the electric lifting assembly are all detachable, the inspection rod 5 is divided into a sleeve and a main rod body, the sleeve penetrates through the lifting connecting plate 21, the inspection rod 5 is rotationally connected with the connecting block 23 through the sleeve, and the main rod body is spliced at the bottom of the sleeve, so that the split is facilitated; the swivel 3 is provided with a clamping seat, and a base 32 in the electric lifting assembly is sleeved on the clamping seat, so that the split is convenient.
In order to facilitate understanding of the embodiments of the present solution by those skilled in the art, the working principle of the embodiments of the present solution will now be described with reference to specific application scenarios:
firstly, the mounting ring 1 of the inspection device is assembled and fixed with bolts at the port of the pump shell 29 of a coolant pump to be inspected through the connecting lugs 2, then the servo motor 8 is started, the servo motor 8 drives the adjusting screw rod 6 to rotate, the adjusting screw rod 6 is in threaded connection with the lifting connecting plate 21, and the lifting connecting plate 21 is limited by the limiting guide rod 7, so that the lifting connecting plate 21 can only lift in the rotating process of the adjusting screw rod 6, the lifting connecting plate 21 is convenient to descend to the corresponding position inside the pump shell 29 with the inspection rod 5, when the inspection rod 5 is in the initial position, the inspection end at the bottom of the inspection rod is aligned to the upper side position of the guide vane 30 inside the pump shell 29, then the stepping motor 11 is started, the feeding amount of the stepping motor 11 is set each time by virtue of the absolute value encoder, the stepping motor 11 is ensured to be stopped at one inspection point just after the rotating ring 3 by a certain angle through the action of the driving gear 10, and the stepping motor 11 is controlled to repeatedly and automatically run by virtue of the motor controller; and each time the swivel 3 is stopped, the electric telescopic rod 20 is arranged to perform telescopic movement exactly once;
when the electric telescopic rod 20 stretches, the telescopic end of the electric telescopic rod pushes the linkage vertical plate 19, the linkage vertical plate 19 deflects due to the pushing action, so that the inspection rod 5 is driven to deflect, the arc end at the bottom of the inspection rod 5 conveniently rotates to enter a position at the upper side of a cavity between two guide vanes 30 at a corresponding point, in the process, a coil spring 31 at the rotating end at the top of the inspection rod 5 is tightened to generate resilience force, when the telescopic end of the electric telescopic rod 20 breaks away from the end face of the linkage vertical plate 19 in the stretching process, the linkage vertical plate 19 just deflects to the outside of the front edge of the main supporting plate 12 and is supported on the transition supporting plate 16, the position is kept at the corresponding height at the moment, a first pressure sensor for starting a camera at the bottom of the inspection rod 5 is arranged on the upper end face of the transition supporting plate 16, and after the linkage vertical plate 19 rotates to the upper side of the transition supporting plate 16, the first pressure sensor senses, so that the camera at the bottom of the inspection rod 5 starts shooting the upper side position welding line of the inspection point;
when the electric telescopic rod 20 pushes the linkage riser 19 onto the transition support plate 16, the electric telescopic rod 20 continues to extend, then the telescopic end of the electric telescopic rod 20 pushes the linkage baffle 13, the linkage baffle 13 drives the transition support plate 16 to slide and gradually pull away from the bottom of the linkage riser 19, before the linkage riser 19 is completely pulled away, the linkage riser 19 stays at the corresponding height for a period of time, fixed-point shooting is facilitated, when the transition support plate 16 is completely pulled away from the bottom of the linkage riser 19, the telescopic end of the electric telescopic rod 20 is blocked in the reset direction of the linkage riser 19, so that the electric telescopic rod 20 cannot rotate and reset, then the bottom loses support, the linkage riser 19 and the inspection rod 5 descend for a certain distance due to the action of gravity, a second pressure sensor for starting a camera at the bottom of the inspection rod 5 is distributed on the lifting connecting plate 21, and when the inspection rod 5 descends, the camera at the bottom of the inspection rod 5 is started to shoot the position welding seam again, namely, the position welding seam at the upper side and the lower side is automatically completed, and inspection is facilitated;
during the extension of the electric telescopic rod 20, as the telescopic end of the electric telescopic rod 20 moves forward, i.e. moves towards the direction of the traction steel wire 24, the traction steel wire 24 is loosened, the lifting support plate 17 slides down along the connecting guide rail 18 by means of gravity, when the linkage vertical plate 19 rotates to the position above the transition vertical plate 16, the lifting support plate 17 is lowered to the corresponding position, so that when the transition vertical plate 16 is transversely pulled away from the bottom of the linkage vertical plate 19, the blocking of the lifting support plate 17 on the lowering of the linkage vertical plate 19 is avoided, when the electric telescopic rod 20 contracts, the traction steel wire 24 is pulled, the traction steel wire 24 is turned by the guide ball 25, the lifting support plate 17 is pulled upwards, so that the lifting support plate 17 slides upwards along the connecting guide rail 18, the lifting support plate 17 pushes the linkage vertical plate 19 upwards, and enables the lifting support plate 17 to lift and reset along the checking rod 5, when the lifting support plate 17 is lifted to the position of the main support plate 12, and as the electric telescopic rod 20 is contracted and reset, the checking rod 5 is not blocked in the rotation direction, the checking rod 5 is prevented from being rotated, the checking rod 5 is reset by the coil spring motor 31, and then the checking rod is reset by the elastic force of the coil spring motor to continue to feed the stepping down, so that the checking is facilitated.
The foregoing describes one embodiment of the present invention in detail, but the description is only a preferred embodiment of the present invention and should not be construed as limiting the scope of the invention. All equivalent changes and modifications within the scope of the present invention are intended to be covered by the present invention.
Claims (8)
1. A nuclear power plant coolant pump detection apparatus, comprising:
the mounting ring (1), both sides of the mounting ring (1) are provided with connecting lugs (2);
the swivel (3) is rotatably arranged on the mounting ring (1);
the gear driving mechanism is connected with the inner ring of the mounting ring (1), and the driving end of the gear driving mechanism is connected with the rotating ring (3) in a matched manner;
the electric lifting assembly is arranged on the swivel (3) and is provided with a lifting connecting plate (21);
the detection rod (5) penetrates through the lifting connecting plate (21); the lifting connecting plate (21) is provided with a guide mechanism, the top of the detection rod (5) is in running fit with the guide mechanism, the top of the detection rod (5) is provided with a coil spring (31), and one side of the detection rod (5) is provided with a linkage vertical plate (19);
the electric telescopic rod (20) is horizontally connected to one side of the lifting connecting plate (21), and the telescopic end of the electric telescopic rod (20) is matched with the linkage vertical plate (19);
and the supporting plate assembly is arranged on the lifting connecting plate (21) and is matched with the linkage vertical plate (19).
2. The nuclear power station coolant pump detection device according to claim 1, wherein the support plate assembly comprises a main support plate (12), a transition support plate (16) and a reset top plate mechanism, the main support plate (12) is connected to one side, close to an electric telescopic rod (20), of a lifting connecting plate (21), a linkage vertical plate (19) is matched to be positioned on the main support plate (12), a guide sleeve (14) is connected to the edge position of the front end of the main support plate (12), the transition support plate (16) is inserted in the guide sleeve (14) in a sliding manner, the transition support plate (16) is flush with the main support plate (12), a connecting spring (15) is connected between the transition support plate (16) and the guide sleeve (14), one end, away from the detection rod (5), of the transition support plate (16) is connected with a linkage baffle (13) aligned with the telescopic end of the electric telescopic rod (20), the reset top plate mechanism is arranged on one side of the front end of the main support plate (12), and the reset top plate mechanism is matched and connected with the telescopic end of the electric telescopic rod (20).
3. Nuclear power plant coolant pump detection arrangement according to claim 2, characterized in that the return roof mechanism comprises a connecting rail (18) and a lifting support plate (17), the connecting rail (18) is connected to the underside of the front end of the main support plate (12), the lifting support plate (17) is slidingly connected to the connecting rail (18), and a traction mechanism is connected between the lifting support plate (17) and the telescopic end of the electric telescopic rod (20).
4. A nuclear power plant coolant pump detection arrangement according to claim 3, characterized in that the traction means comprises a traction wire (24) and a guiding ball (25), one end of the traction wire (24) is connected with the telescopic end of the electric telescopic rod (20), the guiding ball (25) is connected to the front end of the main pallet (12), and the traction wire (24) penetrates the guiding ball (25).
5. A nuclear power plant coolant pump detection device according to claim 1, characterized in that the gear drive mechanism comprises a stepper motor (11), a mounting seat (9), a drive gear (10) and an internal gear ring (4), the mounting seat (9) is connected to the inner ring of the mounting ring (1), the stepper motor (11) is connected to the mounting seat (9), the drive gear (10) is connected to the spindle end of the stepper motor (11), the internal gear ring (4) is arranged on the inner ring of the swivel (3), and the internal gear ring (4) is meshed with the drive gear (10).
6. The nuclear power station coolant pump detection device according to claim 5, characterized in that a plurality of rollers (27) are circumferentially distributed at the bottom of the swivel (3), a convex ring (26) is arranged at the upper side edge of the inner ring of the installation ring (1), and the rollers (27) are matched to be positioned outside the convex ring (26).
7. The nuclear power station coolant pump detection device according to claim 1, characterized in that the electric lifting assembly comprises a base (32), a fixing base (28), a limiting guide rod (7), a servo motor (8) and an adjusting screw (6), wherein the base (32) is arranged on a swivel (3), the limiting guide rod (7) is connected to the base (32), the limiting guide rod (7) penetrates through a lifting connecting plate (21), the fixing base (28) is connected to the top of the limiting guide rod (7), the servo motor (8) is arranged on the fixing base (28), the adjusting screw (6) is rotatably connected between the fixing base (28) and the base (32), the top rotating end of the adjusting screw (6) is connected with a main shaft of the servo motor (8), the adjusting screw (6) penetrates through the lifting connecting plate (21), and the adjusting screw (6) is in threaded connection with the lifting connecting plate (21).
8. A nuclear power plant coolant pump detection device according to claim 1, characterized in that the guiding mechanism comprises a connecting block (23) and a lifting slide bar (22), the lifting slide bar (22) penetrates through the lifting connecting plate (21), the connecting block (23) is fixedly connected to the top of the lifting slide bar (22), the top of the detection rod (5) is rotationally connected with the connecting block (23), and the coil spring (31) is cooperatively connected between the top of the detection rod (5) and the connecting block (23).
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311717330.8A CN117686520A (en) | 2023-12-14 | 2023-12-14 | Nuclear power station coolant pump detection device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202311717330.8A CN117686520A (en) | 2023-12-14 | 2023-12-14 | Nuclear power station coolant pump detection device |
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| CN202311717330.8A Pending CN117686520A (en) | 2023-12-14 | 2023-12-14 | Nuclear power station coolant pump detection device |
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