Nuclear power main pipeline welding monitoring cross tool

Abstract

The utility model discloses a nuclear power main pipeline welding monitoring cross tool, which relates to the technical field of nuclear power station construction and comprises a support leg base, a bull's-eye base is fixedly mounted at the center of the support leg base, and a plurality of support legs are uniformly arranged on the periphery of the support leg base and radially extend by taking the position of the bull's-eye as the center; one end of each supporting leg is slidably mounted on the corresponding supporting leg base, and the other end of each supporting leg can abut against the inner wall of the main pipeline; the supporting legs are in transmission connection with the same driving device through transmission structures, and the driving device drives the supporting legs to abut against or loosen the inner wall of the main pipeline at the same time. The supporting legs are driven by the driving device to abut against or loosen the inner wall of the main pipeline at the same time, so that rapid adjustment is achieved, the adjusting efficiency is high, driving is achieved through the same driving device, it can be guaranteed that the extending lengths of all the supporting legs are consistent, certain concentricity is guaranteed, it can be guaranteed that the relative position of the target center is stable, and follow-up fine adjustment is only needed; therefore, the position of the target center can be adjusted, and working efficiency and adjusting precision are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of nuclear power plant construction, in particular to a nuclear power main pipeline welding monitoring cross tool. Background Art

[0002] The existing method of monitoring deformation of the main pipeline of the nuclear island reactor of a nuclear power plant is to use a cross fixture to directly install the bull's eye on the inner wall of the main pipeline during the welding process between the main pipeline and the reactor pressure vessel. However, the existing cross fixture has a simple structure. For example, Chinese patent CN202473268U discloses a fixture device for laser tracking and monitoring the cross bull's eye of the center of the pipeline. By setting a bull's eye base on the cross fixture, the bull's eye base can be used to achieve fine adjustment of the front, back, left and right of the bull's eye.

[0003] However, this structure is cumbersome to operate. When the four legs are installed in the main pipeline, the four legs need to be adjusted separately, which is cumbersome to operate, and the accuracy of the bull's eye position is low. Subsequently, a large-scale fine-tuning is required through the bull's eye base, which is relatively inefficient. Utility Model Content

[0004] The purpose of the utility model is to provide a nuclear power main pipeline welding monitoring cross tooling, by arranging a transmission structure between four legs, the four legs are adjusted simultaneously through the transmission structure, thereby improving the adjustment efficiency, and the relative position of the target center is relatively stable, and only fine-tuning is required subsequently to complete the position adjustment of the target center, which greatly improves the work efficiency and adjustment accuracy.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a nuclear power main pipeline welding monitoring cross tooling, including a leg base, a bull's eye base is fixedly installed at the center position of the leg base, a plurality of legs are evenly arranged around the leg base, and the plurality of legs extend radially with the position of the bull's eye as the center; one end of the leg is slidably installed on the leg base, and the other end can be pressed against the inner wall of the main pipeline; the plurality of legs are connected to the same driving device through a transmission structure, and the driving device drives the legs to press against or loosen the inner wall of the main pipeline at the same time.

[0006] After adopting the above structure, the driving device drives the supporting legs to simultaneously press against or loosen the inner wall of the main pipe, thereby realizing rapid adjustment with high adjustment efficiency. By driving with the same driving device, the extended length of each supporting leg can be guaranteed to be consistent, and a certain concentricity can be guaranteed, so that the relative position of the bull's eye can be guaranteed to be relatively stable. Only fine-tuning is required subsequently to complete the position adjustment of the bull's eye, which greatly improves work efficiency and adjustment accuracy.

[0007] In order to ensure the sliding stability of the leg, a slideway is provided on the leg base, and a slider is slidably installed in the slideway. The extension direction of the slideway coincides with the extension and retraction direction of the corresponding leg. One end of the leg is screwed on the slider, and a foot is provided at the other end of the leg, which contacts the inner wall of the main pipe.

[0008] In order to avoid friction and ensure that the support leg can stably contact the inner wall of the main pipe, the contact position of the support leg with the inner wall of the main pipe is a round head.

[0009] In order to avoid the length change of the supporting leg, which may cause the support to fail, the supporting leg is also provided with an external thread, on which a fixing nut is tightened. When the length of the supporting leg is determined, the fixing nut is tightened so that the fixing nut rests on the supporting leg base.

[0010] In order to simplify the volume of the device, reduce the force of the slider and increase the service life of the device, the transmission structure includes a turntable rotatably installed on the leg base, and a plurality of connecting columns are evenly arranged on the circumference of the turntable corresponding to the number of legs, and the connecting columns and their corresponding sliders are hinged by connecting rods.

[0011] In order to increase the self-locking function, a worm wheel is fixed on the rotating shaft of the turntable, and a worm is rotatably installed on the leg base. The worm is meshed with the worm wheel, and one end of the worm extends out of the leg base.

[0012] In order to facilitate the rotation of the worm, a knob is arranged at one end of the worm extending out of the leg base, and hand patterns are arranged on the knob.

[0013] In order to achieve stable support, there are four legs.

[0014] In order to achieve manual fine-tuning in the X-axis, Y-axis and Z-axis directions, the bull's eye base is a three-axis fine-tuning displacement slide.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are:

[0016] The utility model discloses a nuclear power main pipeline welding monitoring cross tooling which solves the technical problems in the prior art that the cross tooling is complicated to operate and the efficiency of adjusting the bull's eye position is low. The utility model provides a transmission structure between the four legs, and the four legs are adjusted simultaneously by the transmission structure, thereby improving the adjustment efficiency. Moreover, the relative position of the bull's eye is relatively stable, and only fine-tuning is required subsequently to complete the position adjustment of the bull's eye, thereby greatly improving the work efficiency and the adjustment accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural schematic diagram of a nuclear power main pipeline welding monitoring cross tooling of the utility model;

[0018] Figure 2 It is a structural schematic diagram of the outrigger base and the transmission structure.

[0019] In the figure, 1. leg base, 11. leg, 111. fixing nut, 12. slideway, 121. slider, 13. foot, 2. bull's eye base, 3. transmission structure, 31. turntable, 311. connecting column, 32. connecting rod, 33. worm gear, 331. worm, 332. hand pattern. DETAILED DESCRIPTION

[0020] The utility model is further described below in conjunction with the accompanying drawings.

[0021] The orientations mentioned in this specification are based on the orientations of the nuclear power main pipeline welding monitoring cross tooling of the utility model during normal operation, and do not limit the orientations during storage and transportation. They only represent relative position relationships, not absolute position relationships.

[0022] like Figure 1 and Figure 2 As shown together, a nuclear power main pipeline welding monitoring cross tool includes a leg base 1, and a bull's eye base 2 is fixedly installed at the center of the leg base 1. A plurality of legs 11 are evenly arranged around the leg base 1, and the number of legs 11 can be reasonably set according to actual needs, such as three or four. In order to achieve stable support, the present embodiment has four legs 11, and three legs can be set in actual applications. The plurality of legs 11 extend radially with the bull's eye as the center; one end of the leg 11 is slidably installed on the leg base 1, and the other end can be pressed against the inner wall of the main pipeline; the plurality of legs 11 are connected to the same driving device through a transmission structure 3, and the driving device drives the legs 11 to press against or loosen the inner wall of the main pipeline at the same time.

[0023] In order to ensure the sliding stability of the leg 11, a slideway 12 is provided on the leg base 1, and a slider 121 is slidably installed in the slideway 12, and the extension direction of the slideway 12 coincides with the extension direction of the corresponding leg 11. The slider 121 slides in the slideway 12, thereby driving the extension and contraction of the leg 11, thereby realizing the coarse adjustment support of the leg 11.

[0024] One end of the leg 11 is screwed onto the slider 121, so that the leg 11 can be fine-tuned. When the inner wall of the main pipe is slightly deformed or uneven, the four legs 11 cannot rest against the inner wall of the main pipe at the same time. By adjusting the depth of the leg 11 screwed onto the slider 121, the length of the leg 11 can be fine-adjusted to compensate for the error.

[0025] The other end of the leg 11 is provided with a foot 13, which contacts the inner wall of the main pipe. In order to avoid friction and ensure that the foot 13 can stably contact the inner wall of the main pipe, the contact position of the foot 13 with the inner wall of the main pipe is a round head. The leg 11 is also provided with an external thread, and a fixing nut 111 is tightened on the external thread. When the length of the leg 11 is determined, the fixing nut 111 is tightened so that the fixing nut 111 abuts against the leg base 1, thereby ensuring the locking of the position of the leg 11.

[0026] The transmission structure 3 can adopt a variety of structures, such as a screw rod can be rotatably installed at the center of the leg base 1, a nut can be installed at the upper limit of the screw rod, and a pull ring is provided around the nut corresponding to the slider 121, and the pull ring and the slider 121 are hinged through a push plate. Through the limit of the slider 121, when the screw rod rotates, the nut will not rotate with it, but move up and down along the screw rod. By rotating the screw rod, the nut is driven to rise and fall, so that the slider 121 is pushed by the push plate to slide along the slideway 12, thereby realizing the extension and retraction of the leg 11.

[0027] In another embodiment, in order to simplify the volume of the device, reduce the force of the slider 121, and increase the service life of the device, the transmission structure 3 includes a turntable 31 rotatably mounted on the leg base 1, and a plurality of connecting columns 311 are evenly arranged on the circumference of the turntable 31 corresponding to the number of legs 11, and the connecting columns 311 and the corresponding sliders 121 are hingedly connected through connecting rods 32.

[0028] When the turntable 31 is rotated, the turntable 31 drives the connecting column 311 to rotate, so that the connecting rod 32 drives the sliding block 121 to slide along the slideway 12, thereby realizing the extension and retraction of the supporting leg 11.

[0029] The rotation of the turntable 31 can be achieved by combining a gear and a rack. For example, a gear is fixed on the rotating shaft of the turntable 31, and a rack is slidably installed on the leg base 1. One end of the rack extends out of the leg base 1, and the rack is pushed to slide, thereby driving the rotation of the turntable 31.

[0030] In order to increase the self-locking function in this embodiment, a worm wheel 33 is fixed on the rotating shaft of the rotating disk 31, and a worm 331 is rotatably mounted on the leg base 1. The worm 331 is meshed with the worm wheel 33, and one end of the worm 331 extends out of the leg base 1. By rotating the worm 331, the worm wheel 33 is driven to rotate, and then the rotating disk 31 is driven to rotate.

[0031] In order to facilitate the rotation of the worm 331 , a knob is provided at one end of the worm 331 extending out of the leg base 1 , and a finger pattern 332 is provided on the knob.

[0032] The bull's eye base 2 is a three-axis fine-tuning displacement slide. The three-axis fine-tuning displacement slide can be reasonably selected according to actual conditions, such as one of LD60 / 40 / 90 / 125, which is not limited in this embodiment. The bull's eye base 2 is fixedly mounted on the leg base 1 by bolts, and manual fine-tuning can be performed in the X-axis, Y-axis and Z-axis directions.

[0033] like Figure 1 and Figure 2 As shown together, the operation process of a nuclear power main pipeline welding monitoring cross tooling:

[0034] The worm 331 is rotated to drive the worm wheel 33 to rotate, and then the turntable 31 is driven to rotate; the turntable 31 drives the connecting column 311 to rotate, so that the connecting rod 32 drives the slider 121 to slide along the slideway 12, thereby realizing the extension of the leg 11. When it is extended to a certain range, the support foot 13 is pressed against the inner wall of the main pipe, realizing the rough adjustment support of the cross tooling; then each leg 11 is rotated respectively to ensure that each leg 11 is pressed against the inner wall of the main pipe. When the length adjustment of the leg 11 is completed, the fixing nut 111 is tightened to make the fixing nut 111 press against the leg base 1, thereby ensuring the locking of the length position of the leg 11; finally, the bull's eye is fine-tuned through the bull's eye base 2 to complete the adjustment of the bull's eye.

[0035] The utility model discloses a nuclear power main pipeline welding monitoring cross tooling which solves the technical problems in the prior art that the cross tooling is complicated to operate and the efficiency of adjusting the bull's eye position is low. The utility model provides a transmission structure between the four legs, and the four legs are adjusted simultaneously by the transmission structure, thereby improving the adjustment efficiency. Moreover, the relative position of the bull's eye is relatively stable, and only fine-tuning is required subsequently to complete the position adjustment of the bull's eye, thereby greatly improving the work efficiency and the adjustment accuracy.

[0036] Of course, the above description is not a limitation of the present invention, and the present invention is not limited to the above examples. Changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should also fall within the protection scope of the present invention.

Claims

1. A nuclear power main pipeline welding monitoring cross tool, characterized by: It includes a leg base, a bull's eye base is fixedly installed at the center position of the leg base, a plurality of legs are evenly arranged around the leg base, and the plurality of legs radially extend with the bull's eye as the center; one end of the leg is slidably installed on the leg base, and the other end can be pressed against the inner wall of the main pipe; the plurality of legs are connected to the same driving device through a transmission structure, and the driving device drives the legs to press against or release the inner wall of the main pipe at the same time.

2. A nuclear power main pipeline welding monitoring cross tool according to claim 1, characterized in that: A slideway is provided on the leg base, a slider is slidably installed in the slideway, the extension direction of the slideway coincides with the extension direction of the corresponding leg, one end of the leg is screwed on the slider, and the other end of the leg is provided with a foot, which contacts the inner wall of the main pipe.

3. A nuclear power main pipeline welding monitoring cross tool according to claim 2, characterized in that: The position on the support leg that contacts the inner wall of the main pipe is a round head.

4. A nuclear power main pipeline welding monitoring cross tool according to claim 1, characterized in that: The supporting leg is also provided with an external thread, and a fixing nut is tightened on the external thread. When the length of the supporting leg is determined, the fixing nut is tightened to make the fixing nut abut against the supporting leg base.

5. A nuclear power main pipeline welding monitoring cross tool according to claim 2, characterized in that: The transmission structure comprises a turntable rotatably mounted on the leg base, a plurality of connecting columns are evenly arranged on the circumference of the turntable corresponding to the number of the legs, and the connecting columns and the corresponding sliding blocks are hinged via connecting rods.

6. A nuclear power main pipeline welding monitoring cross tool according to claim 5, characterized in that: A worm wheel is fixed on the rotating shaft of the turntable, a worm is rotatably mounted on the leg base, the worm is meshed with the worm wheel, and one end of the worm extends out of the leg base.

7. A nuclear power main pipeline welding monitoring cross tool according to claim 6, characterized in that: A knob is arranged at one end of the worm extending out of the leg base, and hand patterns are arranged on the knob.

8. A nuclear power main pipeline welding monitoring cross tool according to claim 1, characterized in that: There are four supporting legs.

9. A nuclear power main pipeline welding monitoring cross tool according to claim 1, characterized in that: The bull's eye base is a three-axis fine-tuning displacement slide.

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