Rapid positioning device for angle of outer wall of pipeline

Abstract

The utility model provides a pipeline outer wall angle rapid positioning device, which comprises a measuring assembly, a pointer assembly, a support stud, a door-shaped support and a positioning pointer, the pointer assembly is assembled on a slideway of the measuring assembly, and the support stud and the door-shaped support are respectively and fixedly arranged at the tail ends of two sides of a support of the measuring assembly and the outer side of a central line. Mounting through holes are formed in the bracket beside the two ends of the slide way, and positioning pointers are assembled in the mounting through holes; calibration and alignment are carried out by pointing a positioning pointer to a necessary circumferential marking point, a supporting stud and a door-shaped support are screwed to fix the position of the device, and a pointer assembly is used for confirming and marking a machining position point meeting technical requirements on a measuring assembly. The machining position of a welding positioning hole at a circumferential specified angle can be accurately and quickly determined on the surface of a main pipeline elbow. The device is easy and convenient to operate and convenient to disassemble, assemble and maintain, construction efficiency and quality are effectively improved, and the risk that data distortion is caused by a traditional technological method, and then pipe fittings are scrapped is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to the device in the machining technical field, especially pipeline outer wall angle quick positioning device. BACKGROUND

[0002] The main pipeline is one of seven key equipments of nuclear island and is called the "aorta" of nuclear power plant. The AP1000 main pipeline adopts 316LN stainless steel integral forging forming, the maximum pipeline outer diameter of the pipeline of the series reaches 956 millimeters, the maximum wall thickness reaches 85 millimeters, and the total length of pipe section unfolding is about 6 meters. The biggest manufacturing difficulty of the elbow pipe is that the elbow pipe body has two large-diameter branch pipe nozzles integrated at a 45° angle, after bending forming, 5-14 unequal welding branch pipes need to be welded on the pipeline outer wall, and at most 7 welding branch pipes with different angles need to be welded in the same circumferential direction. Before the welding of the branch pipe, positioning holes need to be drilled in the corresponding positions of the pipe wall, and the small cylinders at the ends of the welding branch pipe are inserted into the positioning holes for positioning, and then the branch pipe welding work is carried out.

[0003] The angle tolerance of the positioning hole of the elbow pipe wall is ±0.25°, and the final acceptance is based on the plane determined by the axis of the straight section at the two side ports of the main pipe of the elbow pipe as the reference to measure the relative angle of the positioning hole of the elbow pipe and the finally welded branch pipe. First, the straight section at the two side ports of the main pipe of the elbow pipe is leveled on the marking platform, and then two center lines are drawn on the outer wall of the compression side and the stretching side of the elbow pipe with a marking needle as the 0° reference for determining the circumferential positioning hole angle of the elbow pipe, and the plane determined by the two center lines is parallel to the platform. The usual method for determining the circumferential angle is to use the outer circle diameter of the disc section circle of the disc ruler, and then to determine the circumferential angle of the outer wall by proportional division. Due to the irregular shape of the pipe wall caused by the bending and multiple shaping of the straight pipe, the ellipticity of each circumferential section, especially the circumferential section of the bending section, is inconsistent, the outer circle diameters of the bending section and the straight section of the elbow pipe are different, and the arc lengths of the upper half circle and the lower half circle on the center line of the same circumferential section are also different. If the angle is divided by arc length in proportion, it is easy to cause the same angle to be at different horizontal positions, and the deviation is too large, which is not suitable for the positioning hole confirmation of the nuclear level elbow pipe.

[0004] The method currently adopted is to measure the position points of the positioning holes by using a laser tracker. Since the measurement process is to fit a plane and a cylinder, it is necessary to delete points deviating greatly according to the fitting effect, but this may lead to data distortion, and the position points, the number of points, the number of deleted points and the unreasonable parameter setting will all affect the final result. At the same time, since the positioning hole affects the key process of welding the branch pipe, the bent pipe is close to the finished product delivery state at this time, and re-welding is not allowed. If the position deviation occurs, it will directly lead to product scrap. In order to avoid measurement deviation, a larger allowance needs to be reserved for the subsequent welding of the branch pipe to ensure that the angle is qualified, which will undoubtedly increase the welding workload and increase the risk of weld cracks in the welding process, and will also bring difficulties to the eccentric machining after welding and the intersection line machining of the welded pipe seat, which will also lead to pipe scrap. Therefore, how to meet the drawing requirements to accurately and quickly determine the welding positioning hole angle has become a problem to be solved. Practical new type content

[0005] In order to accurately and quickly determine the circumferential specified angle of the welding positioning hole on the surface of the main pipeline bend, the utility model provides a pipeline outer wall angle quick positioning device. The device is calibrated and aligned by pointing to the circumferential mark point to be drawn, the device position is fixed by tightening the support studs and the door type support, and the pointer assembly is used to confirm and mark the processing position points meeting the technical requirements on the measuring assembly, so as to solve the technical problem that the processing position of the welding positioning hole is not easy to accurately determined by the traditional process method.

[0006] The scheme adopted by the utility model to solve the technical problem is:

[0007] The pipeline outer wall angle quick positioning device comprises a measuring assembly, which is designed in a crescent structure, the measuring assembly comprises a support, a scale disc and a slide, the scale disc is fixedly arranged on the inner side of the support, the slide is arranged on the inner side of the support and the periphery of the scale disc, and mounting through holes are arranged in the inner side of the support at both ends of the slide; a pointer assembly is assembled on the slide and extends to the inner side of the scale disc; support studs are fixedly arranged at the two ends of the support and extend to and tightly abut against the main pipeline to be measured; a door type support is fixedly arranged on the outer side of the center line of the support and arranged in a vertical direction, and extends to and tightly abut against the main pipeline to be measured; and a positioning pointer is assembled in the mounting through holes at both ends of the support and extends to the main pipeline to be measured.

[0008] The pointer assembly disclosed by the embodiment comprises a sliding block assembled on the slide, three through holes for installation are formed on the side wall and arranged at the lower end, the upper end and the front end respectively, a sliding seat screw rod is arranged through the lower end through hole of the sliding block, a threaded through hole is formed at the center point of the sliding block in the front and back directions, a sliding seat nut is arranged through the upper end through hole of the sliding block and assembled and connected with the sliding seat screw rod, a scale pointer is assembled at the rear end of the threaded through hole of the sliding seat screw rod and extends to the inner side of the dial, and an extension screw pipe is sleeved on the periphery of the scale pointer and has an accommodating space inside.

[0009] Positive effects:

[0010] The pointer assembly is assembled on the slide of the measuring assembly, the support screw and the door-shaped support are fixed at the two ends of the bracket and the outer side of the center line respectively, the mounting through hole is formed in the bracket on the side of the two ends of the slide, and the positioning pointer is assembled in the through hole. The positioning pointer is calibrated and aligned by pointing to the circumferential mark point, the support screw and the door-shaped support are tightened to fix the position of the device, the pointer assembly is used to confirm and mark the processing position point meeting the technical requirements on the measuring assembly, and the welding positioning hole processing position of the circumferential specified angle of the surface of the main pipeline elbow is accurately and quickly determined. The device is simple and convenient to operate, convenient to disassemble, maintain and use, effectively improves the construction efficiency and quality, avoids the risk of data distortion caused by the traditional process method and thus causes the pipe to be scrapped, and is suitable for use as a pipeline outer wall angle rapid positioning device. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a front view of the embodiment of the application;

[0012] Figure 2 It is a side view of the embodiment of the application;

[0013] Figure 3 It is a local section view of the embodiment of the application.

[0014] In the drawings,

[0015] 10. The measuring assembly,

[0016] 11. The bracket, 12. The dial, 13. The slide,

[0017] 20. The pointer assembly,

[0018] 21. The sliding block, 22. The sliding seat screw rod, 23. The sliding seat nut,

[0019] 24. The scale pointer, 25. The extension screw pipe, 26. The marking pointer;

[0020] 30. The support screw;

[0021] 40. Door type support;

[0022] 50. Positioning pointer. DETAILED DESCRIPTION

[0023] The technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Although the embodiments of the present application have been shown and described, those skilled in the art can understand that various changes, modifications, replacements and variations can be made to the embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor belong to the scope of protection of the present application.

[0024] As shown in the drawings, the pipe outer wall angle rapid positioning device comprises:

[0025] The measuring assembly 10 is designed in a crescent structure and comprises a support 11, a scale disc 12 and a slide 13. The scale disc 12 is fixed to the inner side of the support 11, and the slide 13 is arranged on the outer periphery of the scale disc 12 and is opened in the inner part of the support 11. The installation through holes are opened in the inner part of the support 11 on both sides of the slide 13. The pointer assembly 20 is assembled on the slide 13 and extends to the inner side of the scale disc 12. The support stud 30 is fixed to the two end sides of the support 11, extends to the main pipe to be measured and is tightly pressed. The door type support 40 is fixed to the outer side of the center line of the support 11, is arranged in the vertical direction, extends to the main pipe to be measured and is tightly pressed. The positioning pointer 50 is assembled in the installation through holes of the two ends of the support 11 and the pointed end extends to the main pipe to be measured.

[0026] Specifically, the bracket 11 is designed in a double-layer crescent structure, the outer layer and the inner layer are connected by a plurality of welded pipes, the outer layer is used to provide a handrail for the construction personnel to facilitate the operation of the device, and the inner layer is used to provide installation and support; the scale disc 12 is designed in a semi-circular ring structure and is fixedly arranged on the inner side of the bracket 11 by welding, the measurement values at both ends thereof are 1°; the slide 13 is arranged on the inner side of the inner layer of the bracket 11 and is arranged on the periphery of the scale disc 12, and the upper and lower spaces of the bracket 11 are communicated, the slidable range of the slide 13 corresponds to the measurable range of the scale disc 12; the installation through holes are arranged in the inner side of the bracket 11 at both sides of the slide 13, the installation through holes pass through the outer layer and the inner layer of the bracket 11, and the distances between the installation through holes and both ends of the scale disc 12 are 1°, which are used as the 0° positioning reference of the device; the pointer assembly 20 is assembled on the slide 13, extends to the inner side of the scale disc 12 and always points to the center point of the scale disc 12; the rear ends of the support studs 30 are fixedly arranged at the two end terminals of the bracket 11 by welding, the front ends of the support studs 30 extend to the main pipeline to be measured and are tightly pressed, the crossbeam part of the door-shaped support 40 is arranged in the vertical direction and is fixedly arranged outside the center line of the bracket 11 by welding, the support part of the door-shaped support 40 extends to the main pipeline to be measured and is tightly pressed, and the door-shaped support 40 cooperates with the support studs 30 to stabilize the spatial position of the measurement assembly 10; the positioning pointers 50 are assembled in the installation through holes at both ends of the bracket 11, the pointed ends of the positioning pointers 50 extend to the main pipeline to be measured and point to the center point thereof, and the positioning pointers 50 are calibrated and aligned by pointing to the circumferential mark points.

[0027] The pointer assembly 20 comprises a sliding block 21 assembled on the slide 13, three through holes for installation are arranged on the side wall and are arranged at the lower end, the upper end and the front end of the sliding block 21 respectively; a sliding seat screw 22 is arranged through the lower end through hole of the sliding block 21, a threaded through hole is arranged at the center point of the sliding block 21 in the front-rear direction; a sliding seat nut 23 is arranged through the upper end through hole of the sliding block 21 and is assembled and connected with the sliding seat screw 22; a scale pointer 24 is assembled at the rear end of the sliding seat screw 22, the front end of the scale pointer 24 extends to the inner side of the scale disc 12; an extension screw pipe 25 is sleeved on the periphery of the scale pointer 24 and has an accommodation space in the interior thereof; and a mark pointer 26 is assembled in the interior of the extension screw pipe 25 and the pointed end of the mark pointer 26 extends to the main pipeline to be measured.

[0028] Specific, the slider 21 is assembled on the slide 13, and can freely slide along the semicircular track of the slide 13, three through holes for mounting are formed on the side wall, and are arranged at the lower end, the upper end and the front end respectively; the slide screw 22 passes through the lower end through hole of the slider 21 and the slide 13 from below in sequence, extends to the center point of the slider 21, and a threaded through hole is formed at the center point of the slider 21 in the front-rear direction; the slide nut 23 passes through the upper end through hole of the slider 21 and the slide 13 from above in sequence, extends to the center point of the slider 21, and is assembled and connected with the slide screw 22 on the upper side of the center point of the slider 21 in a threaded connection mode, the position of the slider 21 is locked by the cooperation of the two; polytetrafluoroethylene gaskets are additionally arranged at the contact positions of the slide screw 22 and the slide nut 23 and the slider 21, the sliding stability of the pointer assembly 20 in the slide 13 is improved, and the position of the pointer assembly 20 is prevented from moving to affect the measurement accuracy of the device; the rear end of the scale pointer 24 is assembled in the threaded through hole of the slide screw 22 in a threaded connection mode, the front end of the scale pointer 24 extends to the inside of the scale disc 12 and always points to the center point of the scale disc 12, and is used for indicating the current measurement angle value; the extension screw pipe 25 is arranged on the periphery of the scale pointer 24 in a threaded connection mode, has an accommodation space in the inside and is processed with threads; the marking pointer 26 is assembled in the inside of the extension screw pipe 25 in a threaded connection mode, the tip of the marking pointer 26 extends to the measured main pipeline and points to the center point of the measured main pipeline, and is used for marking the determined processing position point.

[0029] During the implementation of the embodiment, before the device is used, at least five circumferential marking points are drawn on the circumferential section of the positioning hole of the outer wall of the bend along the axis from the theoretical port of the measured main pipeline according to the drawing data, and the circumferential marking points intersecting the inner-arc and outer-arc median lines of the two sides of the bend are necessary points.

[0030] The characteristics of the utility model are:

[0031] The utility model discloses a pointer assembly 20 is assembled on the slide 13 of measuring assembly 10, and the support stud 30 and the door type support 40 are respectively fixed on the both sides end of support 11 of measuring assembly 10 and the outside of center line, the mounting through -hole is seted up in the inside of support 11 on the both ends side of slide 13, and the inside is assembled with the locating pointer 50. In the actual use process, the locating pointer 50 is pointed to the circumferential mark point of must draw and is calibrated and is aligned, and the support stud 30 and the door type support 40 are tightened to the position of device is fixed, and the pointer assembly 20 is used to confirm and mark the processing position point of meeting the technical requirement on measuring assembly 10, realizes the accurate, fast determination circumferential designated angle welding positioning hole processing position of bend pipe surface to main pipeline. Through this technical scheme, effectively improve the construction efficiency and quality, and this device is simple and convenient to operate, and the dismounting and maintenance are convenient, avoid the risk of traditional process method leading to data distortion and making pipe spare scrap.

[0032] Finally, it should be noted that: the above only for the preferred embodiments of the utility model have described, and do not limit the utility model, although the utility model is described in detail with reference to the foregoing embodiments, for the person skilled in the art, it still can modify the technical scheme recorded in the foregoing each embodiment, or equivalent replacement to part technical feature, any modification, equivalent replacement, improvement etc. that is made within the spirit and principles of the utility model, should be contained in the protection scope of the utility model.

Claims

1. A device for quickly positioning the angle of the outer wall of a pipeline, characterized in that: a measuring assembly (10) is designed in a crescent structure and comprises a support (11), a scale dial (12) and a slide (13), the scale dial (12) is fixed to the inner side of the support (11), the slide (13) is arranged on the inner side of the support (11) and is arranged on the periphery of the scale dial (12), and mounting through holes are arranged in the inner side of the support (11) on both sides of the slide (13); a pointer assembly (20) is arranged on the slide (13) and extends to the inner side of the scale dial (12); support studs (30) are fixed to the two ends of the support (11) and extend to and abut against the main pipeline to be measured; a door-shaped support (40) is fixed to the outer side of the center line of the support (11) and extends to and abuts against the main pipeline to be measured; and a positioning pointer (50) is arranged in the mounting through holes of the two ends of the support (11) and extends to the main pipeline to be measured. The pointer assembly (20) comprises a sliding block (21) arranged on the slide (13) and having three through holes for mounting arranged on the side wall and respectively arranged at the lower end, the upper end and the front end of the sliding block (21); a sliding seat screw (22) arranged through the lower end through hole of the sliding block (21) and having a threaded through hole arranged at the center point of the sliding block (21) and extending in the front-rear direction; a sliding seat nut (23) arranged through the upper end through hole of the sliding block (21) and connected with the sliding seat screw (22); a scale pointer (24) arranged at the rear end of the sliding seat screw (22) and extending to the inner side of the scale dial (12); an extension screw pipe (25) sleeved on the periphery of the scale pointer (24) and having an accommodation space in the interior thereof; and a marking pointer (26) arranged in the interior of the extension screw pipe (25) and extending to the main pipeline to be measured. ​ ​ ​ ​ 2. The device for rapid positioning of the angle of the outer wall of the pipeline according to claim 1, characterized by the fact that: ​ ​ ​ ​ ​ ​ ​

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