U-shaped elbow helix angle auxiliary measuring device and method

Abstract

The invention provides an auxiliary measuring device and method for the helix angle of a U-shaped bent pipe. The device comprises a supporting swing angle mechanism, a rotation angle measuring mechanism and a threaded jack. The supporting swing angle mechanism is provided with a supporting platform, a universal bubble level is arranged at one end of the supporting platform, a semi-cylindrical plate support is hinged to the other end of the supporting platform, the extending end of the semi-cylindrical plate support abuts against the pipe supporting plate, and the inclination angle of the semi-cylindrical plate support is adjusted through a fine adjustment screw. The corner measuring mechanism is provided with a flat plate, the lower surface of the flat plate is tightly hooped on the upper surface of the terminal straight section of the U-shaped bent pipe through a double-hook elastic belt, and a strip-shaped bubble level is arranged at one end of the upper surface of the flat plate; the inclination angle of the rotating plate is adjusted through the plate supporting screw rod, and another strip-shaped bubble level is arranged on the rotating plate; the threaded jack is used for lifting the U-shaped bent pipe; the two sets of supporting swing angle mechanisms are arranged at the positions, close to the two straight sections, of the U-shaped bent pipe, and the threaded jacks abut against the bottoms of the two ends of the lowest straight section of the U-shaped bent pipe to support the straight sections of the U-shaped bent pipe.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pipe fittings, in particular to a U-shaped elbow pipe helix angle auxiliary measuring device and method. BACKGROUND

[0002] A wave tube is a tubular structure capable of transmitting waves, which uses the shape and structure of the tube to make the waves propagate in the tube in a specific way and speed, for transmitting energy, regulating wave amplitude and frequency, and realizing directional transmission of waves. The corrugations of the wave tube are parallel to the axis of the pipe, and the corrugations are deformed by stretching and contracting to absorb vibration and hydraulic impact, and reduce the transmission of noise and vibration. The wave tube is mainly applied in hydraulic and pneumatic systems as a pressure reduction device for reducing noise and reducing vibration.

[0003] In specific practice, the wave tube of the AP1000 includes a U-shaped elbow pipe, which has a form that the two straight sections of the pipe end and the horizontal plane passing through the axis of the middle straight section are respectively ±2.5°+0.5-0.5, and the straightness of the straight section is required to be 0.1mm. In the pipe bending process, the process ensures that the straight section does not participate in deformation. The installation form of the U-shaped elbow pipe starts from the straight section of the pipe end, and the three consecutive 90° turning straight sections of the U-shaped elbow pipe gradually rise upward at an angle of 2.5°+0.5-0.5 with respect to the horizontal plane. The acceptance standard of the U-shaped elbow pipe is modeled according to the installation form for size rechecking.

[0004] However, the present application inventors found at least the following technical problems in the process of implementing the technical solutions of the embodiments of the present application: The U-shaped elbow pipe needs to be re-pressed and shaped multiple times to meet the final acceptance standard, especially in the near forming stage, a laser tracker needs to be repeatedly measured to provide data support for shaping. The high-cost measuring equipment of the laser tracker is widely needed by various products in the factory, but the resource allocation is severely insufficient, which greatly affects the shaping work of the U-shaped elbow pipe.

[0005] Therefore, the U-shaped elbow pipe helix angle auxiliary measuring device, referred to as the elbow pipe angle measuring device, is designed according to the measurement process of the laser tracker. On the premise of ensuring the measurement quality and accuracy, the use of the laser tracker is greatly reduced, which not only reduces the cost, but also alleviates the production delay caused by the shortage of laser tracker resources. SUMMARY

[0006] In order to overcome the deficiencies in the prior art and solve the problem of providing process data detection for elbow pipe shaping instead of a laser tracker, the embodiments of the present application provide a U-shaped elbow pipe helix angle auxiliary measuring method. The method overcomes the production situation of insufficient laser tracker resources and solves the technical problem of size measurement of the U-shaped elbow pipe through a U-shaped elbow pipe helix angle auxiliary measuring device.

[0007] The technical problem solved by the embodiment of the application is: A U-shaped bent pipe helical rise angle auxiliary measuring device includes a support swing angle mechanism, a rotation angle measuring mechanism and a threaded jack; The support swing angle mechanism has a support platform, a universal bubble level is arranged at one end of the support platform, and a hinged semicircular plate holder is arranged at the other end, the extended end of the semicircular plate holder is rested on a pipe support plate, and the inclination angle of the semicircular plate holder is adjusted by a fine adjustment screw; the rotation angle measuring mechanism has a flat plate, the lower surface of the flat plate is tightly clamped on the upper surface of the terminal straight section of the U-shaped bent pipe by a double-hook elastic band, a strip-shaped bubble level is arranged at one end of the upper surface of the flat plate, and a rotating plate is hinged at the other end, the inclination angle of the rotating plate is adjusted by a plate support screw, and another strip-shaped bubble level is arranged on the rotating plate; the threaded jack is used to lift the U-shaped bent pipe. Among them, two sets of support swing angle mechanisms are arranged near the two straight sections of the U-shaped bent pipe, and the threaded jack is placed at the bottom of the two ends of the lowest U-shaped bent pipe straight section to support the U-shaped bent pipe straight section.

[0008] In order to further solve the technical problem to be solved by the embodiment of the application, in a U-shaped bent pipe helical rise angle auxiliary measuring method provided by the embodiment of the application, a U-shaped bent pipe helical rise angle auxiliary measuring device is applied, and the method includes the following steps: Step one, use the threaded jack to make the U-shaped bent pipe into a helical rising shape, and try to reduce the height of the U-shaped bent pipe under the condition that the support swing angle mechanism can be placed under the corresponding straight section; Step two, refer to the universal bubble level, adjust the level by using the leveling screw, read the relative rotation angle between the large fixed sleeve and the large rotating sleeve by rotating the fine adjustment screw, and adjust the semicircular plate holder to a position of 2.5° with the horizontal plane by the method that the line segments of the large reference scale disc and the limiting scale disc are collinear, adjust the height of the U-shaped bent pipe straight section by the threaded jack, so that the U-shaped bent pipe straight section is smoothly and without gap in the circular groove of the semicircular plate holder, and similarly, adjust the U-shaped bent pipe straight section adjacent to the horizontal plane to 2.5°, and at the same time, the U-shaped bent pipe straight section is without gap and is attached to the circular groove of the semicircular plate holder of the support swing angle mechanism; Step three, fix the rotation angle measuring mechanism on the terminal straight section of the U-shaped bent pipe by the double-hook elastic band, so that the flat plate is tightly attached to the pipe wall, refer to the strip-shaped bubble level on the flat plate of the rotation angle measuring mechanism to make the flat plate circumferentially horizontal, rotate the plate support screw on the rotating plate, adjust the rotating plate by referring to the strip-shaped bubble level, read the rotation angle of the small fixed sleeve and the small rotating sleeve by the principle that the line segments of the small reference scale disc and the angle scale disc are collinear, and determine the angle of the end of the U-shaped bent pipe relative to the horizontal plane.

[0009] The technical scheme provided in the embodiment of the application has at least the following technical effects or advantages: 1. Because the embodiments of this application use a threaded jack in conjunction with two sets of supporting swing angle mechanisms to swing the two adjacent straight sections of the U-shaped bend to an angle of 2.5° with the horizontal plane in sequence, and install an angle measuring mechanism at the end straight section of the U-shaped bend, the technical problem of measuring the size of the U-shaped bend in the prior art is effectively solved. It can measure the angle value of the straight section axis relative to the horizontal plane to determine whether the U-shaped bend meets the size requirements, thereby achieving the technical effect of solving the problem of insufficient laser tracker resources.

[0010] 2. Because this embodiment of the application uses the technique of accommodating the groove of the semi-cylindrical plate support within the protrusion of the tube support plate, under the premise of ensuring that the bottom of the protrusion and the groove are tangent, rotating the fine-tuning screw drives the semi-cylindrical plate support to move up and down, so that the semi-cylindrical plate support and the tube support plate remain tangent while generating relative sliding, thereby causing the tube support plate to rotate around the large rotating axis. When the edge of the groove that is closer to the large rotating axis contacts the surface of the semi-cylindrical plate, the swing angle is 2°, and when the edge of the groove that is farther from the large rotating axis contacts the surface of the semi-cylindrical plate, the swing angle is 3°. The initial adjustment swing angle of the supporting swing angle mechanism is 2°. The 5° angle effectively solves the technical problem of U-shaped bend size measurement in the existing technology. By using a rotating fine-tuning screw to read the relative rotation angle between the large fixed sleeve and the large rotating sleeve, and by using a steel ruler to make the line segments of the large reference scale and the limit scale collinear, the semi-cylindrical plate support forms a 2.5° angle with the horizontal plane. The spiral jacks supporting the straight section of the U-shaped bend are slowly lowered, so that the outer surface of the straight section of the U-shaped bend is completely in contact with the arc groove on the upper surface of the semi-cylindrical plate support. This achieves the technical effect that the swing angle of the support swing angle mechanism is consistent with the swing angle of the straight section of the U-shaped bend.

[0011] This embodiment utilizes an auxiliary measuring device for the helical angle of a U-shaped bend to achieve accurate and reliable measurement during the U-shaped bend straightening process. This addresses the production challenges posed by insufficient laser tracker resources and reduces manufacturing costs resulting from repeated laser tracker measurements. It is suitable as an auxiliary measuring device and method for the helical angle of a U-shaped bend. Attached Figure Description

[0012] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the structure in this embodiment; Figure 2 This is a schematic diagram of the U-shaped bend in this embodiment; Figure 3 This is a magnified view of a portion of area A. Figure 4 This is a magnified view of part I; Figure 5 This is a schematic diagram of the angle measuring mechanism. Figure 6 This is a magnified view of a portion of the image from direction B. Figure 7 This is a magnified view of part II.

[0014] In the picture: 100. Supporting swing angle mechanism, 110. Supporting platform 120. Adjust the leveling screw. 130. Universal bubble level 140. Pipe support plate, 141. Protrusion, 150. Semi-cylindrical plate support, 151. Groove, 160. Large hinge, 161. Large hinge, 162. Large fixed sleeve, 163. Large rotating sleeve, 164. Main shaft end retaining ring, 170. Fine-tuning screw, 171. Nut, 172. Cylindrical sleeve, 173. Self-lubricating bearings 180. Large reference dial; 190. Limiting dial; 200. Angle measuring mechanism 210. Flat panel, 220. Transfer board, 230. Plate support screw, 240. Strip bubble level, 250. Small hinge, 251. Small axle, 252. Small fixing sleeve, 253. Small rotating sleeve, 254. Small shaft end retaining ring, 260. Double hook elastic band 270. Small reference dial, 280. Angle dial; 300. Threaded jack. Detailed Implementation

[0015] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0016] This application provides an auxiliary measurement method for the helix angle of a U-shaped bend, and applies an auxiliary measurement device for the helix angle of a U-shaped bend. This solves the problem of providing process data detection for bend correction in the prior art, which replaces the laser tracker. In the measurement of the U-shaped bend, a support swing angle mechanism 100 and a threaded jack 300 are used to support the U-shaped bend, and combined with the rotation angle measuring mechanism 200, the accurate and reliable measurement of the dimensions of the U-shaped bend is achieved.

[0017] As shown in the figure, a U-shaped bend pipe spiral angle auxiliary measuring device includes a support swing angle mechanism 100, a rotation angle measuring mechanism 200, and a threaded jack 300. The support swing mechanism 100 has a support platform 110. One end of the support platform 110 is equipped with a universal bubble level 130 for detecting the level of the support platform 110, and the other end is equipped with a semi-cylindrical plate support 150 for supporting and lifting the U-shaped bend. The extended end of the semi-cylindrical plate support 150 rests on the pipe support plate 140, and the tilt angle of the semi-cylindrical plate support 150 is adjusted by the fine-tuning screw 170. The angle measuring mechanism 200 has a plate 210. The lower surface of the plate 210 is tightly clamped to the upper surface of the straight section at the end of the U-shaped bend by a double-hook elastic band 260. A strip-shaped bubble level 240 is set at one end of the upper surface of the plate 210 to detect the level of the plate 210. A rotating plate 220 is hinged to the other end. The tilt angle of the rotating plate 220 is adjusted by a plate support screw 230. Another strip-shaped bubble level 240 is set on the rotating plate 220 to detect the level of the rotating plate 220. The threaded jack 300 is used to lift the U-shaped bend, so that the supporting swing mechanism 100 can be placed below the corresponding straight section of the U-shaped bend, and the height of the U-shaped bend is reduced. Among them, two sets of supporting swing angle mechanisms 100 are set near the two straight sections of the U-shaped bend, and threaded jacks 300 are placed at the bottom of both ends of the lowest straight section of the U-shaped bend to support the straight section of the U-shaped bend.

[0018] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: Because the straightness requirement for the straight section of a U-bend is 0.1mm, the process ensures that the straight section does not deform during pipe bending, and the outer wall of the straight section can be used to measure the angle instead of the straight section axis. Therefore, according to the final acceptance standard for U-bends, a threaded jack 300, in conjunction with two sets of supporting swing angle mechanisms 100, is used to sequentially swing the two adjacent straight sections of the U-bend to an angle of 2.5° with the horizontal plane. An angle measuring mechanism 200 is installed at the end of the straight section of the U-bend to measure the angle value of the straight section axis relative to the horizontal plane to determine whether the U-bend meets the dimensional requirements.

[0019] To ensure the stability of the structure in this embodiment, the support swing mechanism 100 includes a support platform 110, a leveling screw 120, a universal bubble level 130, a pipe support plate 140, a semi-cylindrical plate support 150, a large hinge 160, and a fine-tuning screw 170. The support platform 110 is a rectangular structural plate, which serves as the main body supporting the swing mechanism 100. The leveling screw 120 is a threaded bushing, arrayed at the lower part of the support platform 110, used to support the leveling support platform 110; The universal bubble level 130 is installed at one end of the support platform 110 and is used to level the support platform 110. A large hinge 160 is located at one end of the support platform 110; The pipe support plate 140 is a strip plate, and large internal thread holes are provided at both ends of the pipe support plate 140. The fine-tuning screw 170 is screwed to the pipe support plate 140 through a large internal thread hole, which is used to connect the pipe support plate 140 to the support platform 110. The semi-cylindrical plate support 150 is a rectangular plate with an arc groove on the upper surface to contact the U-shaped bend and support the U-shaped bend. One end of the semi-cylindrical plate support 150 is hinged to the support platform 110 through a large hinge 160, and the extended end of the semi-cylindrical plate support 150 rests on the pipe support plate 140. The semi-cylindrical plate support 150 lifts the U-shaped bend near the straight section, and the rotating fine-tuning screw 170 causes the pipe support plate 140 to rise and fall. The semi-cylindrical plate support 150 swings around the large hinge 160 as the axis, thereby realizing the size measurement of the U-shaped bend.

[0020] In this embodiment, there are three leveling screws 120 arranged in a circular array around the center of the support platform 110. Two leveling screws 120 are located near the end of the large hinge 160 and work with the universal bubble level 130 to achieve rapid leveling of the support platform 110.

[0021] To further ensure the stability of the structure in this embodiment, protrusions 141 are provided on both sides of the upper part of the tube support plate 140, and the protrusions 141 are constructed as semi-cylindrical surfaces; internal threaded holes are provided at both ends of the tube support plate 140 for screwing with the fine-tuning screw 170. The lower surface of the semi-cylindrical plate support 150 is provided with a groove 151, the bottom of which is tangent to the semi-cylindrical surface of the tube support plate 140 and can slide relative to it.

[0022] As a standard technical choice, the large hinge 160 includes a large pivot 161, a large fixed sleeve 162, a large rotating sleeve 163, and a large pivot end retaining ring 164. The large pivot 161 is a stepped pivot, serving as the pivot of the large hinge 160; The large fixed sleeve 162 is a bushing structure and is connected to the end of the support platform 110; The large rotating sleeve 163 is a bushing structure, connected to the end of the semi-cylindrical plate support 150. The centers of the two large rotating sleeves 163 and the two large fixed sleeves 162 are collinear. The large shaft end retaining ring 164 is set at the end of the large rotating shaft 161 and is used to form a hinge between the large rotating sleeve 163 and the large fixed sleeve 162 for axial limiting and fixing.

[0023] A large reference scale 180 is provided at the adjacent ends of the large fixed sleeve 162 and the large rotating sleeve 163, and a limiting scale 190 is provided at the adjacent ends of the large rotating sleeve 163 and the large fixed sleeve 162. The limiting scale 190 is aligned with the large reference scale 180.

[0024] Preferably, the fine-tuning screw 170 is locked to the fixed tube support plate 140 by the nut 171. The lower part of the fine-tuning screw 170 is provided with a cylinder, and a self-lubricating bearing 173 is mounted on the cylinder. The cylindrical sleeve 172 is a cylindrical structure and sits on the support platform 110. The fine-tuning screw 170 is mounted on the cylindrical sleeve 172 by the self-lubricating bearing 173, and then the fine-tuning screw 170 rotates inside the cylindrical sleeve 172.

[0025] The technical solutions described in the embodiments of this application have at least the following technical effects or advantages: Because the swing angle range of the supporting swing mechanism 100 needs to be limited to 2.5° + 0.5°. -0.5, such a small angular tolerance makes it difficult to limit the swing angle by accurately reading the rotation angle. Even slight vibration of the U-shaped bend can easily cause the angle of the supporting swing mechanism 100 to exceed the tolerance. To achieve rapid adjustment and system stability of the supporting swing mechanism 100, protrusions 141 on the upper ends of the pipe support plate 140 are provided on the semi-cylindrical surface. These protrusions 141 have an angle limiting function. The angle limiting function is achieved by placing the groove 151 of the semi-cylindrical plate support 150 into the protrusion 141 of the pipe support plate 140. While ensuring that the bottom of the protrusion 141 is tangent to the groove 151, rotating the fine-tuning screw 170 causes the semi-cylindrical plate support 150 to move up and down. This keeps the semi-cylindrical plate support 150 tangent to the pipe support plate 140 while simultaneously creating relative sliding, thus causing the pipe support plate 140 to rotate around the large rotating shaft 161. When the groove 151 is closer to the large rotating shaft 161, the edge... The swing angle is 2° when in contact with the semi-cylindrical surface, and 3° when the edge of the groove 151 that is farther from the large rotating shaft 161 contacts the semi-cylindrical surface. The initial adjustment swing angle of the support swing angle mechanism 100 is 2.5°, and the swing angle of the support swing angle mechanism is adjusted according to actual needs. By using the rotating fine adjustment screw 170 to read the relative rotation angle between the large fixed sleeve 162 and the large rotating sleeve 163, and by using a steel ruler to make the line segments of the large reference scale 180 and the limit scale 190 collinear, the semi-cylindrical plate support 150 forms a 2.5° angle with the horizontal plane. The spiral jacks 300 at both ends of the straight section of the support bend are slowly lowered so that the outer surface of the straight section of the U-shaped bend is completely in contact with the arc groove on the upper surface of the semi-cylindrical plate support 150. While ensuring stable support, the swing angle of the support swing angle mechanism 100 is consistent with the swing angle of the straight section of the U-shaped bend.

[0026] To optimize the structure of this embodiment, the angle measuring mechanism 200 includes a flat plate 210, a rotating plate 220, a plate support screw 230, a strip-shaped bubble level 240, a small hinge 250, and a double-hook elastic band 260. The flat plate 210 is a rectangular structural plate, which serves as the main body supporting the corner measuring mechanism 200; Small hinge 250 is set at one end of flat plate 210; The rotating plate 220 is a rectangular structural plate, which is hinged to the flat plate 210 by a small hinge 250, and a small internal thread hole is provided at the end away from the small hinge 250. The plate support screw 230 is set on the rotating plate 220 at the end away from the small hinge 250, and is screwed to the rotating plate 220 through a small internal thread hole, so that the rotating plate 220 can be adjusted to rotate around the small hinge 250. There are two strip bubble level 240s: one is set on the rotating plate 220 to detect axial level, and the other is set on the flat plate 210 to detect radial level. The double-hook elastic band 260 is set on the lower surface of the flat plate 210, which tightly clamps the flat plate 210 to the upper surface of the U-shaped bend. In this embodiment, there are two double-hook elastic bands 260, which are set at both ends of the flat plate 210.

[0027] As a standard technical choice, the small hinge 250 includes a small pivot 251, a small fixed sleeve 252, a small rotating sleeve 253, and a small pivot end retaining ring 254; The small pivot 251 is a stepped pivot, serving as the pivot of the small hinge 250; The small fixed sleeve 252 is a bushing structure and is connected to the end of the plate 210; The small rotating sleeve 253 is a bushing structure, connected to the end of the rotating plate 220. The centers of the two small rotating sleeves 253 and the two small fixed sleeves 252 are collinear. The small shaft end retaining ring 254 is set at the end of the small rotating shaft 251 and is used to form a hinge between the small rotating sleeve 253 and the small fixed sleeve 252 for axial limiting and fixing.

[0028] Preferably, a small reference scale 270 is provided at the adjacent ends of the small fixed sleeve 252 and the small rotating sleeve 253, and an angle scale 280 is provided at the adjacent ends of the small rotating sleeve 253 and the small fixed sleeve 252, with the angle scale 280 and the small reference scale 270 being aligned.

[0029] The working process of this embodiment: Includes the following steps: Step 1: Use the threaded jack 300 to position the U-shaped bend into a spiral upward shape, and minimize the height of the U-shaped bend while ensuring that the supporting swing mechanism 100 can be placed below the corresponding straight section.

[0030] Specifically, a crane is used to position the U-shaped bend into a spiraling, upward shape and place it securely on the support block. Starting from the lowest straight section at one end of the U-shaped bend, a threaded jack 300 is used to support the bottom of both ends of the lowest straight section. While ensuring that the supporting swing mechanism 100 can be placed under the corresponding straight section, the height of the U-shaped bend is reduced as much as possible, and the supporting swing mechanism 100 is placed under the straight section.

[0031] Step two: With reference to the universal bubble level 130, adjust the level of the support platform 110 of the supporting swing mechanism 100 using the leveling screw 120. Read the relative rotation angle between the large fixed sleeve 162 and the large rotating sleeve 163 by rotating the fine adjustment screw 170. Using a steel ruler, align the line segments of the large reference scale 180 and the limit scale 190 to make them collinear. Adjust the semi-cylindrical plate support 150 to a position of 2.5° with the horizontal plane. Use the threaded jack 300 to adjust the height of the straight section of the U-shaped bend, so that the straight section of the U-shaped bend falls smoothly and without gaps in the arc groove of the semi-cylindrical plate support 150. Similarly, adjust the adjacent straight section of the U-shaped bend to a position of 2.5° with the horizontal plane, while ensuring that it fits without gaps in the arc groove of the semi-cylindrical plate support 150 of the supporting swing mechanism 100.

[0032] Specifically, referring to the universal bubble level 130, adjust the height of the leveling screw 120 below the support platform 110 of the support swing mechanism 100 to make the support swing mechanism 100 level.

[0033] Adjust the pipe support plate 140, ensuring that the groove 151 at the bottom of the semi-cylindrical plate support 150 is always tangent to the protrusion 141 of the pipe support plate 140. Under no-load conditions, simultaneously rotate the fine-tuning screws 170 on both sides of the semi-cylindrical plate support 150 to cause the large rotating sleeve 163 on the semi-cylindrical plate support 150 and the large fixed sleeve 162 on the support platform 110 to rotate relative to each other under the connection of the large rotating shaft 161. Referring to the large reference scale 180 of the large fixed rotating shaft sleeve 162, ensure that the relative rotation angle of the limiting scale 190 on the large rotating sleeve 163 is 2.5°. Use a steel ruler to make the line segments of the large reference scale 180 and the limiting scale 190 collinear to determine the position of the pipe support plate 140. At the same time, tighten the nut 171 of the fine-tuning screw 170 to keep the pipe support plate 140 stable.

[0034] Adjust the threaded jack 300 so that the straight section of the U-shaped bend above the support swing mechanism 100 slowly descends onto the semi-cylindrical plate support 150, fitting seamlessly with its arc groove; similarly, adjust the adjacent straight section of the U-shaped bend to fit 2.5° with the support swing mechanism 100.

[0035] Step 3: Fix the angle measuring mechanism 200 to the straight section at the end of the U-shaped bend using the double hook elastic band 260, so that the plate 210 fits tightly against the pipe wall. Refer to the strip bubble level 240 on the plate 210 of the angle measuring mechanism 200 to make the plate 210 horizontal in all directions. Rotate the plate support screw 230 on the rotating plate 220. Refer to the strip bubble level 240 and adjust the rotating plate 220 to be horizontal. Use a steel ruler and the principle that the line segments of the small reference scale 270 and the angle scale 280 are collinear to read the rotation angle of the small fixed sleeve 252 and the small rotating sleeve 253 to determine the angle of the end of the U-shaped bend relative to the horizontal plane.

[0036] Specifically, the angle measuring mechanism 200 is fixed to the straight section at the end of the U-shaped bend using a double-hook elastic band 260, ensuring that the plate 210 is tightly fitted against the pipe wall. In the initial position of the angle measuring mechanism 200, the plate 210 is parallel to the rotating plate 220, and the small reference scale 270 on the small fixed sleeve 252 and the small rotating sleeve 253 are aligned with the 0° mark on the angle scale 280. The plate 210 is leveled circumferentially by referring to the strip-shaped bubble level 240 on the plate 210 of the angle measuring mechanism 200. The plate on the rotating plate 220... Using the support screw 230, adjust the rotating plate 220 to be level with reference to another strip-shaped bubble level 240. Use the small reference scale 270 of the small fixed sleeve 252 to read the relative rotation angle of the angle scale 280 of the small rotating sleeve 253. Using a steel ruler and the principle that the line segments of the small reference scale 270 and the angle scale 280 are collinear, determine the angle of the straight section of the end of the U-shaped bend relative to the horizontal plane. This will help determine whether the U-shaped bend meets the requirements of the drawing. If necessary, use the tolerances of each pipe section for fine-tuning to determine whether the overall dimensions are qualified.

[0037] The description of this invention is given for illustrative and descriptive purposes only and is not intended to be exhaustive or to limit the invention to the forms disclosed. Many modifications and variations will be apparent to those skilled in the art. The embodiments were chosen and described in order to better illustrate the principles and practical application of the invention and to enable those skilled in the art to understand the invention and to design various embodiments with various modifications suitable for a particular purpose.

[0038] Finally, it should be noted that: The above description is merely a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. A device for auxiliary measurement of helix angle of U-bend pipe, characterized in that: it comprises a support swing angle mechanism (100), a rotation angle measurement mechanism (200) and a threaded jack (300); the support swing angle mechanism (100) has a support platform (110), a universal bubble level (130) is arranged at one end of the support platform (110), a half-cylinder plate holder (150) is arranged at the other end, the extended end of the half-cylinder plate holder (150) is placed on a pipe support plate (140), and the inclination angle of the half-cylinder plate holder (150) is adjusted by a fine adjustment screw (170); the rotation angle measurement mechanism (200) has a flat plate (210), the lower surface of the flat plate (210) is tightly clamped on the upper surface of the terminal straight section of the U-bend pipe by a double-hook elastic band (260), a strip-shaped bubble level (240) is arranged at one end of the upper surface of the flat plate (210), a rotating plate (220) is hinged at the other end, the inclination angle of the rotating plate (220) is adjusted by a plate support screw (230), and another strip-shaped bubble level (240) is arranged on the rotating plate (220); the threaded jack (300) is used to lift the U-bend pipe; wherein two sets of support swing angle mechanisms (100) are arranged near the two straight sections of the U-bend pipe, the threaded jack (300) is placed on the bottom of the two ends of the lowest straight section of the U-bend pipe, and the straight section of the U-bend pipe is supported. 2.A device for auxiliary measurement of helix angle of U-bend pipe according to claim 1, characterized in that: the support swing angle mechanism (100) comprises a support platform (110), a leveling screw (120), a universal bubble level (130), a pipe support plate (140), a half-cylinder plate holder (150), a large hinge (160) and a fine adjustment screw (170); the support platform (110) is a rectangular structure plate, which is the main body of the support swing angle mechanism (100); the leveling screw (120) is a threaded shaft sleeve, which is arranged in an array at the lower part of the support platform (110) and is used to support and level the support platform (110); the universal bubble level (130) is arranged at one end of the support platform (110) and is used to level the support platform (110); the large hinge (160) is arranged at one end of the support platform (110); the pipe support plate (140) is a strip-shaped plate, two ends of the pipe support plate (140) are provided with large internal threaded holes; the fine adjustment screw (170) is screwed with the pipe support plate (140) through the large internal threaded holes and is used to connect the pipe support plate (140) and the support platform (110); the half-cylinder plate holder (150) is a rectangular plate, the upper surface of the half-cylinder plate holder (150) is provided with an arc groove for contacting the U-bend pipe and is used to lift the U-bend pipe; one end of the half-cylinder plate holder (150) is hinged to the support platform (110) through the large hinge (160), and the extended end of the half-cylinder plate holder (150) is placed on the pipe support plate (140); wherein the upper part of the pipe support plate (140) is provided with protrusions (141) on both sides, the protrusions (141) are configured as half-cylinder surfaces; the two ends of the pipe support plate (140) are provided with internal threaded holes for screwing with the fine adjustment screw (170). ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ ​ The lower surface of the semi-cylindrical plate support (150) is provided with a groove (151), the bottom of the groove (151) is tangent to the semi-cylindrical surface of the pipe support plate (140) and can slide relative to the semi-cylindrical surface of the pipe support plate (140); The semi-cylindrical plate support (150) holds the U-shaped bent pipe near the straight section, the pipe support plate (140) is lifted by the rotating fine adjustment screw (170), and the semi-cylindrical plate support (150) swings around the large hinge (160) as the axis, so that the size measurement of the U-shaped bent pipe is realized.

3. The auxiliary measuring device for the helical pitch of a U-shaped bent pipe according to claim 2, characterized in that: The large hinge (160) comprises a large rotating shaft (161), a large fixed sleeve (162), a large rotating sleeve (163) and a large shaft end check ring (164); The large rotating shaft (161) is a stepped shaft and serves as the rotating shaft of the large hinge (160); The large fixed sleeve (162) is a sleeve structure and is connected to the end of the support platform (110); The large rotating sleeve (163) is a sleeve structure and is connected to the end of the semi-cylindrical plate support (150), and the centers of the two large rotating sleeves (163) and the two large fixed sleeves (162) are collinear; The large shaft end check ring (164) is arranged at the end of the large rotating shaft (161) and serves to axially position and fix the large rotating sleeve (163) and the large fixed sleeve (162) between which the hinge is formed; The adjacent end of the large fixed sleeve (162) and the large rotating sleeve (163) is provided with a large reference scale disc (180), the adjacent end of the large rotating sleeve (163) and the large fixed sleeve (162) is provided with a limit scale disc (190), and the limit scale disc (190) is centered with the large reference scale disc (180).

4. The auxiliary measuring device for the helical pitch of a U-shaped bent pipe according to claim 2, characterized in that: The fine adjustment screw (170) is locked and fixed to the pipe support plate (140) through a nut (171), the lower part of the fine adjustment screw (170) is provided with a cylinder, a self-lubricating bearing (173) is assembled on the cylinder, the cylinder sleeve (172) is a cylindrical structure and is seated on the support platform (110), the fine adjustment screw (170) is assembled on the cylinder sleeve (172) through the self-lubricating bearing (173), and the fine adjustment screw (170) rotates in the cylinder sleeve (172).

5. The auxiliary measuring device for the helical pitch of a U-shaped bent pipe according to claim 1, characterized in that: The angle measuring mechanism (200) comprises a flat plate (210), a rotating plate (220), a plate support screw (230), a strip-shaped bubble level (240), a small hinge (250) and a double-hook elastic band (260); The flat plate (210) is a rectangular structure plate and serves as the main body of the angle measuring mechanism (200); The small hinge (250) is arranged at one end of the flat plate (210); The rotating plate (220) is a rectangular structure plate, is hinged to the flat plate (210) through the small hinge (250) and is provided with a small internal thread hole at the end away from the small hinge (250); Plate support screw rod (230) is arranged on the rotating plate (220) away from the small hinge (250) one end, through the small internal thread hole and the rotating plate (220) screw joint, adjust the rotating plate (220) around the small hinge (250) rotation; Strip-shaped bubble level (240) is two, one is arranged on the rotating plate (220), detects the axial level, the other is arranged on the flat plate (210), detects the radial level; Double hook elastic band (260) is arranged on the lower surface of the flat plate (210), and the flat plate (210) is tightly clamped on the upper surface of the U-shaped elbow pipe; Among them, double hook elastic band (260) is two, arranged at both ends of the flat plate (210).

6. The U-shaped elbow pipe helix angle auxiliary measuring device according to claim 5, wherein: The small hinge (250) comprises a small rotating shaft (251), a small fixed sleeve (252), a small rotating sleeve (253) and a small shaft end stop ring (254); The small rotating shaft (251) is a stepped shaft, which is the rotating shaft of the small hinge (250); The small fixed sleeve (252) is a shaft sleeve structure, connected at the end of the flat plate (210); The small rotating sleeve (253) is a shaft sleeve structure, connected at the end of the rotating plate (220), and the centers of the two small rotating sleeves (253) and the two small fixed sleeves (252) are collinear; The small shaft end stop ring (254) is arranged at the end of the small rotating shaft (251), which is used for the small rotating shaft (251) to be inserted between the small rotating sleeve (253) and the small fixed sleeve (252) to form a hinge and be axially limited and fixed; Among them, the small fixed sleeve (252) and the small rotating sleeve (253) are provided with a small reference scale disc (270) at the adjacent end, the small rotating sleeve (253) and the small fixed sleeve (252) are provided with an angle scale disc (280) at the adjacent end, and the angle scale disc (280) is centered with the small reference scale disc (270).

7. A U-shaped elbow pipe helix angle auxiliary measuring method, comprising the following steps: The U-shaped elbow pipe helix angle auxiliary measuring device according to any one of claims 1-6 is applied, comprising the following steps: Step one, use the threaded jack (300) to put the U-shaped elbow pipe into the helix rising form, and under the condition that the support swing mechanism (100) can be put into the corresponding straight section below, try to reduce the height of the U-shaped elbow pipe; Step two, the support platform (110) of the support swing angle mechanism (100) is adjusted to be horizontal by referring to the universal bubble level (130) and using the leveling screw (120). The relative rotation angle between the large fixed sleeve (162) and the large rotating sleeve (163) is read by rotating the fine adjustment screw (170). The semicylindrical plate holder (150) is adjusted to be 2.5° to the horizontal plane by the method of making the line segments of the large reference scale disc (180) and the limit scale disc (190) be collinear. The height of the straight section of the U-shaped bent pipe is adjusted by the threaded jack (300) so that the straight section of the U-shaped bent pipe is smoothly and without gap in the circular arc groove of the semicylindrical plate holder (150). Similarly, the straight section of the U-shaped bent pipe adjacent to the straight section is adjusted to be 2.5° to the horizontal plane and is without gap in the circular arc groove of the semicylindrical plate holder (150) of the support swing angle mechanism (100). Step three, the corner measurement mechanism (200) is fixed on the straight section of the U-shaped bent pipe by the double-hook elastic band (260) so that the flat plate (210) is tightly attached to the pipe wall. The flat plate (210) is circumferentially horizontal by referring to the strip-shaped bubble level (240) on the flat plate (210) of the corner measurement mechanism (200). The plate support screw (230) on the rotating plate (220) is rotated. The rotating plate (220) is adjusted to be horizontal by referring to the strip-shaped bubble level (240). The rotation angle of the small fixed sleeve (252) and the small rotating sleeve (253) is read by the principle of making the line segments of the small reference scale disc (270) and the angle scale disc (280) be collinear by the steel ruler. The angle of the end of the U-shaped bent pipe relative to the horizontal plane is determined.

8. The U-shaped bent pipe helical rise angle auxiliary measurement method according to claim 7, wherein: In step one, the U-shaped bent pipe is placed on the cushion pier in the spiral ascending form by using the crane. The straight section at the lowest end of the U-shaped bent pipe is supported by the threaded jack (300) at the bottom of the two ends of the straight section. The height of the U-shaped bent pipe is lowered as much as possible under the condition that the support swing angle mechanism (100) can be placed under the corresponding straight section.

9. The U-shaped bent pipe helical rise angle auxiliary measurement method according to claim 7, wherein: In the second step, the pipe support plate (140) is adjusted, the groove (151) at the bottom of the semi-cylindrical plate support (150) is always tangent to the protrusion (141) of the pipe support plate (140); in the case of no load, the fine adjustment screw (170) on both sides of the semi-cylindrical plate support (150) is rotated at the same time, the large rotating sleeve (163) on the semi-cylindrical plate support (150) and the large fixed sleeve (162) on the support platform (110) are relatively rotated under the connection of the large rotating shaft (161), the relative rotation angle of the limiting scale disc (190) on the large rotating sleeve (163) is 2.5° with reference to the large reference scale disc (180) of the large fixed rotating shaft sleeve (162), the position of the pipe support plate (140) is determined by the method that the line segment of the large reference scale disc (180) and the limiting scale disc (190) are collinear with the aid of the steel ruler, and the nut (171) of the fine adjustment screw (170) is locked to keep the pipe support plate (140) stable.

10. The auxiliary measurement method for the helical pitch of a U-shaped bent pipe according to claim 7, characterized in that: In the third step, in the initial position of the angle measurement mechanism (200), the flat plate (210) is parallel to the rotating plate (220), the small reference scale disc (270) and the small fixed sleeve (252) are aligned with the scale 0° of the angle scale disc (280) and the small rotating sleeve (253).

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