A lifting trolley and positioning device for plugging pipes of a horizontal steam generator

Abstract

The present invention relates to the technical field of maintenance of steam generators in nuclear power plants, and specifically discloses a lifting trolley and a positioning device for plugging tubes of horizontal steam generators. The lifting trolley includes a support frame, a telescopic module, and a flipping module. Among them, the flipping module is provided on the support frame, and the telescopic module is provided on the flipping module. The flipping module can drive the telescopic module to flip and switch in a direction parallel or perpendicular to the axis of the lifting trolley. The device has a simple and reliable structure. Through modular design, problems with each module can be quickly replaced without affecting other functions. Two cameras are arranged at the top and bottom of the lifting trolley, which can observe the actions of the trolley such as flipping, telescoping, roller expansion, and pulling, making the entire tube plugging implementation process more intuitive. The functions of emergency tripping and manual tube plugging operation are added.

Description

Technical Field

[0001] The present invention belongs to the technical field of maintenance of steam generators in nuclear power plants, and particularly relates to a lifting trolley and a positioning device for plugging tubes of a horizontal steam generator. Background Art

[0002] The steam generator is one of the key equipment in a nuclear power plant, playing the roles of isolating the primary and secondary loops and heat exchange. Manufacturing defects during the processing of the evaporator may cause individual heat transfer tubes to exceed the technical specification requirements, and preventive tube plugging needs to be implemented. In addition, during the normal operation of a nuclear power plant, due to its own defects or the action of insoluble corrosion products, the heat transfer tubes may be damaged as the operation time increases, ultimately leading to the leakage of radioactive substances on the primary side. Therefore, on the basis of regularly checking the integrity of the heat transfer tubes, it is necessary to perform a rapid and reliable tube plugging operation on the damaged heat transfer tubes to remove them from service, so as to ensure the safe and reliable operation of the evaporator. Summary of the Invention

[0003] The purpose of the present invention is to provide an upgraded trolley and a positioning device for plugging tubes of a horizontal steam generator to solve the problem of transporting the tube plugging of the steam generator to the specified heat transfer tube nozzle.

[0004] The technical solution of the present invention is as follows: A lifting trolley for plugging tubes of a horizontal steam generator, which includes a support frame, a telescopic module, and a flipping module. Among them, the flipping module is provided on the support frame, and the telescopic module is provided on the flipping module. The flipping module can drive the telescopic module to flip and switch in a direction parallel or perpendicular to the axis of the lifting trolley.

[0005] The flipping module includes a flipping cylinder, a support seat, a support plate, a lower rotating ear, and an upper hinged ear. Among them, the flipping cylinder is provided on the support frame through the support seat; the lower end of the support seat is movably connected to the lower rotating ear on the support plate, and the end of the flipping cylinder piston rod of the flipping cylinder is movably connected to the upper hinged ear on the support plate.

[0006] The flipping cylinder body in the flipping cylinder is hinged to the upper flipping seat at the upper end of the support seat through a cylinder rotating pin; the end of the flipping cylinder piston rod is hinged to the upper hinged ear through a connector; the lower flipping seat at the lower end of the support seat is hinged to the lower rotating ear through a flipping pin.

[0007] A buffer is provided at the lower end of the support seat, and the buffer can limit the flipping of the support plate to the horizontal position; an emergency lifting ring is provided on the support plate.

[0008] The telescopic module includes a guide rail, a slider and a telescopic cylinder, wherein the guide rail and the telescopic cylinder are fixed on the flip module, the telescopic cylinder piston rod is connected to the slider arranged on the guide rail 41, and the slider can be driven to reciprocate along the guide rail by the telescopic cylinder.

[0009] The slider is provided with a mounting seat, and the mounting seat is provided with a T-slot. The roller expansion device can be quickly connected to the mounting seat through the T-slot and locked and fixed by a locking cylinder on the mounting seat.

[0010] The mounting seat is connected to the slider via a connecting pin and a spring, so that the mounting seat and the slider have flexibility within a certain range of motion.

[0011] The mounting seat includes a transition plate and a dovetail groove plate, the transition plate is fixed to the slider by screws, the dovetail groove plate is fixed to the slider by a connecting pin with a tightening spring, and a certain gap is provided between the dovetail groove plate and the transition plate.

[0012] The dovetail groove plate is provided with a T-slot, and a locking cylinder is provided at the opening of the dovetail groove plate. A pull ring is provided at the end of the locking cylinder, and the pull ring is connected to the blocking block at the T-slot position. By pulling the pull ring, the blocking block can be moved away from the T-slot position, thereby unlocking the roller expansion device in the T-slot.

[0013] A return spring is also provided at the rear end of the slider, and the other end of the return spring is connected to the flip module.

[0014] The support frame is provided with a driving module, and the driving module can drive the lifting trolley to move in the vertical direction along the lifting bracket; the support frame is provided with a plurality of cameras; and the support frame is also provided with a junction box.

[0015] The support frame is provided with a first camera and a second camera, wherein the second camera is arranged at the upper end of the support frame, and the first camera is arranged at the lower end of the support frame.

[0016] A positioning device for blocking a horizontal steam generator pipe, the positioning device comprising a lifting trolley, a lifting bracket and a rotating module, the rotating module being arranged at the flange of a primary side manhole of the steam generator, the lifting bracket being arranged on the rotating module, and the lifting bracket being driven by the rotating module to perform circumferential motion along the axis of the steam generator manifold; the lifting trolley being installed on the lifting bracket and being able to move up and down in a vertical direction along the lifting bracket.

[0017] The remarkable effects of the present invention are as follows: The lifting trolley and positioning device for plugging tubes of a horizontal steam generator described in the present invention have the following advantages: (1) The structure is simple and reliable. Through modular design, problems in each module can be quickly replaced without affecting other functions; (2) Two cameras are provided at the top and bottom of the lifting trolley, which can observe the actions of the trolley such as flipping, telescoping, roll expansion, and pulling, making the entire tube plugging implementation process more intuitive; (3) The emergency release and manual tube plugging operation functions are added. When the tube plugging tool head gets stuck during tube plugging or equipment failure causes the tube plugging tool head to stay in the heat transfer tube and cannot be withdrawn, the roll expansion or pulling execution end can be decoupled from the lifting trolley. After removing the positioning device from the header, construction personnel can enter the header for processing and perform tube plugging operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 is a schematic structural diagram of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0019] Figure 2 is a schematic diagram of the folded state of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0020] Figure 3 is a schematic diagram of the flipped state of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0021] Figure 4 is a schematic diagram of the action state of the telescopic module of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0022] Figure 5 is a schematic structural diagram of the flipping module of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0023] Figure 6 is a top view of the flipping module of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0024] Figure 7 is a schematic structural diagram of the telescopic module of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0025] Figure 8 is a sectional view of the telescopic module of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0026] Figure 9 is Figure 8 a schematic diagram of the flexible connection between the transition plate and the dovetail groove in

[0027] Figure 10 is a schematic diagram of the locking structure of the locking cylinder of a lifting trolley for plugging tubes of a horizontal steam generator described in the present invention;

[0028] Figure 11 It is a schematic diagram of the locking state of the locking cylinder of the lifting trolley used for blocking pipes of a horizontal steam generator according to the present invention;

[0029] Figure 12 It is a schematic diagram of a release state of a locking cylinder of a lifting trolley for blocking a pipe of a horizontal steam generator according to the present invention;

[0030] Figure 13 It is a schematic diagram of a positioning device for blocking a horizontal steam generator pipe according to the present invention working in an evaporator header;

[0031] In the figure: 1, support frame; 2, junction box; 3, second camera; 4, telescopic module; 5, flip module; 6, drive module; 7, first camera; 8, roller expansion device; 9, rotation module; 10, lifting bracket; 11, lifting trolley; 12, steam generator manifold; 41, guide rail; 42, slider; 43, transition plate; 44, dovetail groove plate; 45, reset spring; 46, lower end rotating ear; 47, upper end hinged ear; 48, emergency lifting ring; 49, lock Tightening cylinder; 410, support plate; 411, telescopic cylinder; 412, tightening spring; 413, connecting pin; 414, blocking block; 415, pull ring; 416, clamping block; 51-flip cylinder; 52, flip cylinder body; 53, flip cylinder piston rod; 54, lower flip seat; 55, flip latch; 56, adapter; 57, buffer; 58, support seat; 59, upper flip seat; 510, cylinder rotation pin; 511, hinge pin; 512, R pin; DETAILED DESCRIPTION

[0032] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0033] like Figures 1 to 4 As shown, a lifting trolley 11 for blocking pipes of a horizontal steam generator comprises a supporting frame 1, a telescopic module 4, a flipping module 5 and a driving module 6, wherein a flipping module 5 is installed on the supporting frame 1, and a telescopic module 4 is installed on the flipping module 5, and the telescopic module 4 can be driven to flip and switch in a direction parallel to or vertical to the axis of the lifting trolley 11 through the flipping module 5, and a roller expansion device is installed on the telescopic module 4, and the core rod of the roller expansion device 8 can be driven to pull and rotate through the telescopic module 4; the driving module 6 installed on the supporting frame 1 can drive the lifting trolley 11 to perform upgrading movement along the lifting bracket 10; a first camera 7 and a second camera 3 are installed at different positions on the supporting frame 1, and video monitoring of the roller expansion device 8 on the telescopic module 4 can be performed; the junction box 2 installed on the supporting frame 1 can centrally aggregate the main pipelines on the lifting trolley 11;

[0034] As Figure 5 , Figure 6 shown, the flipping module 5 includes a flipping cylinder 51, a support base 58, a support plate 410, a lower end rotating ear 46, and an upper end hinged ear 47. Among them, the flipping cylinder 51 is installed on the support frame 1 through the support base 58, and the flipping cylinder body 52 is hinged to the upper flipping seat 59 at the upper end of the support base 58 through a cylinder rotating pin 510; the end of the flipping cylinder piston rod 53 is connected to the upper end hinged ear 47 on the support plate 410 through a connector 56, and the end of the connector 56 and the upper end hinged ear are hinged through a hinge pin 511 and an R pin 512; the lower flipping seat 54 at the lower end of the support base 58 is hinged to the lower end rotating ear 46 on the support plate 410 through a flipping pin 55; when the flipping cylinder 51 pulls the flipping cylinder piston rod 53 to retract, the flipping cylinder piston rod 53 drives the support plate 410 to rotate along the flipping pin 55, so that the support plate 410 moves to the vertical position; when the flipping cylinder 51 pushes the flipping cylinder piston rod 53 to extend, the flipping cylinder piston rod 53 pushes the support plate 410 to rotate along the flipping pin 55, so that the support plate 410 moves to the horizontal position; a buffer 57 is installed at the lower end of the lower flipping seat 54, and the buffer 57 can limit the position of the support plate 410 when it flips to the horizontal direction, so as to realize the limit adjustment of the support plate 410 when it flips to the horizontal state; an emergency lifting ring 48 is installed at the upper end of the support plate 410, and a long rod can be used to connect the emergency lifting ring 48 to pull the flipping module to the vertical state;

[0035] As Figures 7 to 12As shown in the figure, the telescopic module 4 includes a guide rail 41, a slider 42, and a telescopic cylinder 411. Among them, the guide rail 41 is installed at the lower end of the support plate 410, and the slider 42 is arranged on the guide rail 41; the body of the telescopic cylinder 411 is fixedly installed on both sides of the guide rail 41 at the lower end face of the support plate 410 through ear plates, and the piston rod of the telescopic cylinder 411 is connected to the slider 42 through an ear plate. When the piston rod of the telescopic cylinder 411 extends and retracts, the slider 42 can be pushed to reciprocate along the guide rail 41; a mounting seat is fixedly connected to the slider 42, and the mounting seat is quickly connected to the roller expanding device 8 through a T-shaped groove, and is locked and fixed by a locking cylinder 49 installed on the slider 42; the mounting seat and the slider 42 are connected by a connecting pin and a spring, so that there is a certain flexibility between the two, enabling the roller expanding device 8 and the pipe plugging tool head to adapt to a certain error and smoothly enter the target heat transfer pipe; the mounting seat includes a transition plate 43 and a dovetail groove plate 44. Among them, the transition plate 43 is fixed on the slider 42 by screws, and the dovetail groove plate 44 is fixed on the transition plate 43 by a connecting pin 413 sleeved with a tightening spring 412, and there is a certain gap between the dovetail groove plate 44 and the transition plate 43. A T-shaped groove is opened on the dovetail groove plate 44, and a locking cylinder 49 is arranged at the opening of the dovetail groove plate 44. The locking cylinder 49 is a double-rod double-acting cylinder, and it can remotely control the locking cylinder to lock after the roller expanding device 8 is quickly installed on the mounting seat through the T-shaped groove; a pull ring 415 is connected to the end of the locking cylinder 49. By pulling the pull ring 415, the blocking block 414 inside the locking cylinder 49 is moved away from the opening position of the T-shaped groove on the dovetail groove plate 44, realizing manual emergency detachment in the case of a locking cylinder failure. A block 416 is also installed at the pull ring 415. When the block 416 is in the horizontal position, the pulling position of the pull ring 415 can be locked; a return spring 45 is also installed at the rear end of the slider 42, and the other side of the return spring 45 is fixedly connected to the support plate 410. In the case of air supply interruption of the cylinder, after the locking cylinder is loosened, the slider 42 retracts under the action of the return spring 45, realizing the separation between the telescopic module 4 and the roller expanding device 8;

[0036] As Figure 13 described, a positioning device for plugging pipes of a horizontal steam generator includes a rotating module 9, a lifting bracket 10, and a lifting trolley 11. Among them, the rotating module 9 is fixed at the manhole flange on the primary side of the steam generator, and the vertically arranged lifting bracket 10 is fixed on the rotating module 9. The rotating module 9 drives the lifting bracket 10 to rotate circumferentially along the axis of the steam generator header 12; the lifting trolley 11 is installed on the lifting bracket 10, and the driving module 6 can drive the lifting trolley 11 to move up and down vertically along the lifting bracket 10; the roller expanding device 8 and the execution end are installed on the lifting trolley 11. Through the rotational movement and vertical movement of the lifting trolley 11, the roller expanding device 8 or the pulling execution end on the lifting trolley 11 can be moved to a specified position.

Claims

1. A lifting trolley for blocking pipes of a horizontal steam generator, characterized in that, the lifting trolley (11) includes a support frame (1), a telescopic module (4) and a flipping module (5). Among them, a flipping module (5) is provided on the support frame (1), and a telescopic module (4) is provided on the flipping module (5). The flipping module (5) can drive the telescopic module (4) to flip and switch in the direction parallel or perpendicular to the axis of the lifting trolley (11); the telescopic module (4) includes a guide rail (41), a slider (42) and a telescopic cylinder (411). Among them, the guide rail (41) and the telescopic cylinder (411) are fixed on the flipping module (5), and the piston rod of the telescopic cylinder (411) is connected to the slider (42) provided on the guide rail (41). The slider (42) can be driven to reciprocate along the guide rail (41) through the telescopic cylinder (411); an installation seat is provided on the slider (42), a T-shaped groove is provided on the installation seat, and the roller expanding device (8) can be quickly connected to the installation seat through the T-shaped groove and locked and fixed by a locking cylinder (49) on the installation seat; a pull ring (415) is provided at the end of the locking cylinder (49), the locking cylinder (49) can be remotely controlled, the locking cylinder adopts a double-rod double-acting cylinder, and in the case of a failure of the locking cylinder (49), a long-rod rotating block (416) can be used. The block (416) drives the pull ring (415) away from the position of the T-shaped groove to unlock the roller expanding device in the T-shaped groove; a return spring (45) is further provided at the rear end of the slider (42), and the other end of the return spring (45) is connected to the flipping module (5).

2. The lifting trolley for blocking pipes of a horizontal steam generator according to claim 1, characterized in that, the flipping module (5) includes a flipping cylinder (51), a support seat (58), a support plate (410), a lower rotating ear (46) and an upper hinged ear (47). Among them, the flipping cylinder (51) is provided on the support frame (1) through the support seat (58); the lower end of the support seat (58) is movably connected to the lower rotating ear (46) on the support plate (410), and the end of the piston rod (53) of the flipping cylinder (51) is movably connected to the upper hinged ear (47) on the support plate (410).

3. The lifting trolley for blocking pipes of a horizontal steam generator according to claim 2, characterized in that, the flipping cylinder body (52) in the flipping cylinder (51) is hinged to the upper flipping seat (59) at the upper end of the support seat (58) through a cylinder rotating pin (510); the end of the piston rod (53) of the flipping cylinder is hinged to the upper hinged ear (47) through a joint (56); the lower flipping seat (54) at the lower end of the support seat (58) is hinged to the lower rotating ear (46) through a flipping pin (55).

4. The lifting trolley for blocking pipes of a horizontal steam generator according to claim 2, characterized in that, A buffer (57) is provided at the lower end of the support seat (58), and the buffer (57) can limit the flipping of the support plate (410) to a horizontal position; an emergency lifting ring (48) is provided on the support plate (410).

5. A lifting trolley for blocking pipes of a horizontal steam generator according to claim 1, It is characterized in that The mounting seat is connected to the slider (42) via a connecting pin and a spring, and the mounting seat and the slider (42) are flexible with a certain range of motion.

6. A lifting trolley for blocking pipes of a horizontal steam generator according to claim 1, It is characterized in that The mounting seat comprises a transition plate (43) and a dovetail groove plate (44); the transition plate (43) is fixed to the slider (42) by means of screws; the dovetail groove plate (44) is fixed to the slider (42) by means of a connecting pin sleeved with a tensioning spring (412); and a certain gap is provided between the dovetail groove plate (44) and the transition plate (43).

7. A lifting trolley for blocking pipes of a horizontal steam generator according to claim 6, It is characterized in that The dovetail groove plate (44) is provided with a T-slot, and a locking cylinder (49) is provided at the opening of the dovetail groove plate (44). The pull ring (415) is connected to the blocking block (414) at the T-slot position. By pulling the pull ring (415), the blocking block (414) can be moved away from the T-slot position, thereby unlocking the roller expansion device (8) in the T-slot.

8. A lifting trolley for blocking pipes of a horizontal steam generator according to claim 1, It is characterized in that The support frame (1) is provided with a driving module (6), and the driving module (6) can drive the lifting trolley (11) to move in a vertical direction along the lifting bracket (10); the support frame (1) is provided with a plurality of cameras; and the support frame (1) is also provided with a junction box (2).

9. A lifting trolley for blocking pipes of a horizontal steam generator according to claim 1, It is characterized in that The support frame (1) is provided with a first camera (7) and a second camera (3), wherein the second camera (3) is arranged at the upper end of the support frame (1), and the first camera (7) is arranged at the lower end of the support frame (1).

10. A positioning device for blocking pipes in horizontal steam generators, It is characterized in that The positioning device comprises a lifting trolley (11), a lifting bracket (10) and a rotating module (9) as claimed in any one of claims 1 to 9, wherein the rotating module (9) is arranged at the flange of the primary manhole of the steam generator, and the lifting bracket (10) is arranged on the rotating module (9). The lifting bracket (10) can be driven by the rotating module (9) to perform circumferential movement along the axis of the steam generator manifold (12); the lifting trolley (11) is installed on the lifting bracket (10) and can move up and down in a vertical direction along the lifting bracket (10).

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