Quick measuring device for small-diameter pipeline end

Abstract

The present application relates to the technical field of welded pipe end measurement, and discloses a small-caliber pipe end rapid measurement device, which comprises a clamping seat capable of being clamped in a measured pipe and a rotating frame rotatably installed on the clamping seat, and a rotating plate left side is provided with at least two rings of positioning pin rings arranged from inside to outside in sequence, each ring of positioning pin rings comprises N positioning pins uniformly distributed along the circumferential direction around the central axis of the fixed shaft, N is an even number, and a pipe end accommodating space of the measured pipe is formed between the two rings of positioning pin rings. The present application has reasonable and compact structure, is convenient to use, can rapidly measure whether the pipe end inner diameter, pipe end straightness, pipe opening flatness, pipe opening ovality and other parameters of the welded pipe exceed the standard, greatly shortens the pipe end measurement operation time, improves the measurement efficiency, and can use the clamping seat and the rotating frame corresponding to the actual measured pipe specification size according to the pipe specification size combination, has strong use flexibility, and has the characteristics of simple use, high efficiency and convenience.

Description

Technical Field

[0001] This invention relates to the field of welded pipe end measurement technology, and is a rapid measurement device for small-diameter pipe ends. Background Technology

[0002] During pipe welding, if the inner or outer diameter of the pipe end exceeds the standard, it will cause difficulties in welding the two pipes together. Therefore, before welding, it is necessary to measure the inner and outer diameters of the pipe end to check whether the pipe meets the welding standards. In the past, it was necessary to use multiple measuring tools to completely measure the inner and outer diameters of a pipe end, which was time-consuming and inefficient. Summary of the Invention

[0003] This invention provides a rapid measurement device for small-diameter pipe ends, which overcomes the shortcomings of the prior art and can effectively solve the problem of low measurement efficiency in existing welded pipe end measurement operations.

[0004] The technical solution of the present invention is achieved through the following measures: a rapid measuring device for the pipe end of a small-diameter pipe, comprising a clamping seat that can be clamped in the pipe to be measured and a rotating frame rotatably mounted on the clamping seat. The clamping seat includes a fixed shaft and wing plates. The fixed shaft is horizontally arranged. At least three wing plates are evenly spaced along the circumferential direction on the outer left side of the fixed shaft. The rotating frame includes a sleeve, a rotating plate, and positioning pins. A sleeve that can rotate around the central axis of the fixed shaft is detachably and rotatably mounted on the right side of the fixed shaft. A rotating plate perpendicular to the central axis of the fixed shaft is fixedly connected to the sleeve. The left side of the rotating plate is a vertical plane perpendicular to the central axis of the fixed shaft. At least two rings of positioning pins are arranged sequentially from the inside to the outside on the left side of the rotating plate. Each ring of positioning pins includes N positioning pins evenly distributed along the circumferential direction around the central axis of the fixed shaft, where N is an even number. The two rings of positioning pins form a space for accommodating the pipe end of the pipe to be measured.

[0005] The following are further optimizations and / or improvements to the above-mentioned technical solution:

[0006] The aforementioned fixed shaft may include a cylindrical segment and a frustum segment (larger on the left and smaller on the right) connected sequentially from left to right and coaxially arranged. A flange is fixedly connected to the outer side of the cylindrical segment. The sleeve is internally continuous, and its inner bore includes a tapered section (larger on the left and smaller on the right), a straight section smoothly transitioning to the right end of the tapered section, and a connecting hole section connecting to the right end of the straight section. The sleeve is fitted onto the outer side of the frustum segment through its inner bore, with the inner wall of the tapered section contacting the outer wall of the frustum segment. A rotating plate is fixedly connected to the right end of the sleeve. A mounting through hole is provided on the rotating plate corresponding to the position of the connecting hole. A connecting hole and a mounting through hole are inserted into the mounting through hole. It has an L-shaped handle, and a first threaded hole is provided at the right end of the frustum section. One end of the L-shaped handle is provided with a first threaded post that is threadedly connected to the first threaded hole. A fixing sleeve is fixedly connected to the right side of the rotating plate and fitted onto the outside of the L-shaped handle. The inner hole of the fixing sleeve is a second threaded hole that communicates with the mounting through hole. The other end of the L-shaped handle is provided with a second threaded post that can be threadedly connected to the second threaded hole. The diameter of the second threaded post is larger than the diameter of the first threaded post. A limiting boss is provided on the L-shaped handle corresponding to the right side of the fixing sleeve. The left end face of the limiting boss is in contact with the right end face of the fixing sleeve.

[0007] The angle between the generatrix of the conical surface of the aforementioned frustum section and the central axis of the frustum section can be ≤4 degrees, and the angle between the generatrix of the inner wall of the conical hole section and the central axis of the conical hole section can be ≤4 degrees; the length of the end of the wing plate away from the fixed end along the central axis parallel to the fixed axis is 8 mm to 12 mm.

[0008] On the left side of the rotating plate, located outside the central axis of the aforementioned fixed shaft, at least three rings of threaded mounting holes are distributed from the inside to the outside. Each ring of threaded mounting holes includes the same number of threaded mounting holes evenly distributed circumferentially around the central axis of the fixed shaft. The central axis of the threaded mounting holes is parallel to the central axis of the fixed shaft. The threaded mounting holes in each pair of adjacent rings are set one-to-one. The intersection of the central axis of the fixed shaft and the plane containing the left side of the rotating plate is defined as the center. The intersection of the central axis of each threaded mounting hole and the plane containing the left side of the rotating plate is defined as the reference point. Among the reference points in each pair of adjacent rings, the line connecting the reference point in the inner ring and the corresponding reference point in the outer ring to the center coincides. Each mounting hole in each of the two rings of threaded mounting holes is equipped with a locating pin. The locating pin includes a cylindrical pin segment and a stud segment connected sequentially from left to right and arranged coaxially. The stud segment is threaded into the threaded mounting hole.

[0009] The outer side of the cylindrical pin section and the end of the wing plate away from the fixed axis can be coated with a paint layer of 0.05 mm to 0.1 mm thickness.

[0010] A reinforcing connecting plate may be provided between the sleeve and the rotating plate; several windows are evenly distributed around the central axis of the fixed shaft on the rotating plate.

[0011] This invention has a reasonable and compact structure and is easy to use. It can quickly measure whether parameters such as the inner and outer diameters of the welded pipe ends, the straightness of the pipe ends, the flatness of the pipe openings, and the ellipticity of the pipe openings exceed the standards, which greatly shortens the measurement time of the welded pipe ends and improves the measurement efficiency. Moreover, it can combine corresponding size clamps and rotating frames according to the actual pipe specifications and dimensions being measured, making it highly flexible in use and featuring simple, efficient, and convenient operation. Attached Figure Description

[0012] Appendix Figure 1 This is a schematic diagram of a partial sectional view of the main structure of the preferred embodiment of the present invention.

[0013] Appendix Figure 2 This is a schematic diagram of the structure in use, representing the preferred embodiment of the present invention.

[0014] Appendix Figure 3 This is a schematic diagram of the right side of the rotating plate in the preferred embodiment of the present invention.

[0015] The codes in the attached diagram are as follows: 1 is the wing plate, 2 is the sleeve, 3 is the rotating plate, 4 is the cylindrical section, 5 is the frustum section, 6 is the tapered hole section, 7 is the straight hole section, 8 is the connecting hole section, 9 is the L-shaped handle, 10 is the first threaded hole, 11 is the first threaded post, 12 is the fixing sleeve, 13 is the second threaded hole, 14 is the second threaded post, 15 is the limiting boss, 16 is the threaded mounting hole, 17 is the cylindrical pin section, 18 is the stud section, 19 is the reinforcing connecting plate, 20 is the window, 21 is the mounting through hole, and 22 is the pipe being measured. Detailed Implementation

[0016] The present invention is not limited to the following embodiments, and the specific implementation can be determined according to the technical solution of the present invention and the actual situation.

[0017] In this invention, for ease of description, the description of the relative positions of the components is based on the appendix to the specification. Figure 1 The layout is described using a diagrammatic method, such as front, back, top, bottom, left, right, etc. The positional relationships are determined based on the layout direction of the attached diagram in the instruction manual.

[0018] The present invention will be further described below with reference to embodiments and accompanying drawings:

[0019] As attached Figure 1-3As shown, the small-diameter pipe end rapid measurement device includes a clamping seat that can be clamped in the pipe 22 to be measured and a rotating frame that is rotatably mounted on the clamping seat. The clamping seat includes a fixed shaft and a wing plate 1. The fixed shaft is horizontally arranged. At least three wing plates 1 are evenly spaced along the circumferential direction on the outer left side of the fixed shaft. The rotating frame includes a sleeve 2, a rotating plate 3 and a positioning pin. The right side of the fixed shaft is detachably and rotatably mounted with a sleeve 2 that can rotate around the central axis of the fixed shaft. A rotating plate 3 perpendicular to the central axis of the fixed shaft is fixedly connected to the sleeve 2. The left side of the rotating plate 3 is a vertical plane perpendicular to the central axis of the fixed shaft. The left side of the rotating plate 3 is provided with at least two rings of positioning pins arranged from the inside to the outside. Each ring of positioning pins includes N positioning pins evenly distributed along the circumferential direction around the central axis of the fixed shaft, where N is an even number. The space between the two rings of positioning pins forms a space for accommodating the pipe end of the pipe 22 to be measured.

[0020] Since there are an even number of locating pins in each ring and they are evenly distributed circumferentially, each ring of locating pins can be divided into N / 2 groups of two locating pins each. It is ensured that one locating pin in each group can be obtained by rotating the other locating pin 180 degrees around the central axis of the fixed shaft. The spacing between the two locating pins in each group can be set according to the standard inner and outer diameter values ​​of the welded pipe to be measured. For example, when measuring the end of a welded pipe of a certain specification, the standard outer diameter of this specification is OD, the upper deviation of the outer diameter is ES, the inner diameter is ID, and the lower deviation of the inner diameter is EI. Therefore, the design... The distance between the two locating pins in each group of locating pins in the outer ring is OD+ES, and the distance between the two locating pins in each group of locating pins in the inner ring is ID-EI. Similarly, the dimensions of the fixed shaft and the wing plate 1 can be set according to the inner diameter and outer diameter values ​​of the welded pipe to be measured, which conform to the standard. Specifically, when the jack is installed inside the pipe 22 being measured, the end of the wing plate 1 away from the fixed shaft is in contact with the inner wall of the pipe 22 being measured, and the central axis of the fixed shaft and the central axis of the pipe 22 being measured are collinear. In this application, when used to measure the inner and outer diameters of the pipe end, the flatness of the pipe opening, and the ovality of the pipe opening, the jack is inserted into the pipe being measured. Inside pipe 22, push it inward so that the left side of the rotating plate 3 contacts the right end face of the pipe 22 being measured. At this time, the pipe end of the pipe 22 being measured is stuck between the inner and outer rings of positioning pins. Rotate the rotating plate 3. If the rotating plate 3 cannot be rotated because the inner ring positioning pin abuts against the inner wall of the pipe 22 being measured, or the outer ring positioning pin abuts against the outer wall of the pipe 22 being measured, it indicates that the inner or outer diameter of the pipe 22 being measured is out of standard, or the ovality of the pipe end is out of standard. In addition, since the left side of the rotating plate 3 is a vertical plane perpendicular to the central axis of the fixed axis, when the pipe end face of the pipe 22 being measured is in contact with the left side of the rotating plate 3... When a large gap appears, it indicates that the perpendicularity of the end face of the measured pipe 22 is not up to standard. If the end of the measured pipe 22 abuts against the positioning pin and cannot be engaged between the inner and outer positioning pin rings, it indicates that the straightness of the pipe end is not up to standard. Therefore, the setting of this application can quickly measure multiple parameters of the welded pipe end, and can quickly detect whether the measured welded pipe meets the standards, greatly shortening the measurement operation time and improving the measurement efficiency. In addition, since the clamp and the rotating frame are detachably connected, when measuring pipes with the same inner diameter but different wall thicknesses, only the rotating frame of different specifications and sizes needs to be replaced, which has strong applicability. Specifically, in this embodiment, the left side of the rotating plate 3 is provided with inner and outer positioning pin rings, and six wing plates 1 are evenly arranged circumferentially on the outer side of the left side of the fixed shaft. Each positioning pin ring includes six positioning pins evenly distributed circumferentially around the central axis of the fixed shaft.

[0021] The above-mentioned rapid measurement device for small-diameter pipe ends can be further optimized and / or improved according to actual needs:

[0022] As attached Figure 1 , 2As shown, the fixed shaft includes a cylindrical section 4 and a frustum section 5, which are connected sequentially from left to right and coaxially arranged. A wing plate 1 is fixedly connected to the outside of the cylindrical section 4. The sleeve 2 is internally continuous, and its inner hole includes a tapered section 6 (larger on the left and smaller on the right), a straight hole section 7 that smoothly transitions to the right end of the tapered section 6, and a connecting hole section 8 that connects to the right end of the straight hole section 7. The sleeve 2 is fitted onto the outside of the frustum section 5 through its inner hole, with the inner wall of the tapered section 6 in contact with the outer wall of the frustum section 5. A rotating plate 3 is fixedly connected to the right end of the sleeve 2. A mounting through hole 21 is provided on the rotating plate 3 corresponding to the position of the connecting hole. An L-shaped handle 9 passes through the connecting hole and the mounting through hole. The right end of the platform 5 is provided with a first threaded hole 10. One end of the L-shaped handle 9 is provided with a first threaded post 11 that is threaded together with the first threaded hole 10. The right side of the rotating plate 3 is fixedly connected with a fixing sleeve 12 that is fitted on the outside of the L-shaped handle 9. The inner hole of the fixing sleeve 12 is a second threaded hole 13 that communicates with the mounting through hole. The other end of the L-shaped handle 9 is provided with a second threaded post 14 that can be threaded together with the second threaded hole 13. The diameter of the second threaded post 14 is larger than the diameter of the first threaded post 11. A limiting boss 15 is provided on the L-shaped handle 9 corresponding to the right side of the fixing sleeve 12. The left end face of the limiting boss 15 is in contact with the right end face of the fixing sleeve 12. When the first threaded post 11 is tightened into the first threaded hole 10, the limiting boss 15 and the fixing sleeve 12 abut against each other, so that the inner wall of the tapered hole section 6 and the outer wall of the frustum section 5 fit together tightly. This ensures that the sleeve 2 can rotate around the central axis of the fixed shaft. When the inner wall of the tapered hole section 6 is tightly held on the outer wall of the frustum section 5 and it is difficult to separate the fixed shaft and the sleeve 2, it is only necessary to unscrew the first threaded post 11 out of the first threaded hole 10 and then screw the second threaded post 14 into the second threaded hole 13. The fixed shaft is pushed to the left by the abutment between the head end of the second threaded post 14 and the right end of the frustum section 5, so that the fixed shaft and the sleeve 2 can be separated easily. The disassembly and assembly of the fixed shaft and the sleeve 2 is labor-saving and convenient.

[0023] Preferably, the angle between the generatrix of the conical surface of the frustum segment 5 and the central axis of the frustum segment 5 is ≤4 degrees, and the angle between the generatrix of the inner wall of the conical hole segment 6 and the central axis of the conical hole segment 6 is ≤4 degrees; the length of the end of the wing plate 1 away from the fixed point along the central axis parallel to the fixed axis is 8 mm to 12 mm. Preferably, the length of the end of the wing plate 1 away from the fixed point along the central axis parallel to the fixed axis is 10 mm.

[0024] As attached Figure 1-3As shown, at least three rings of threaded mounting holes are distributed from the inside to the outside on the left side of the rotating plate 3, corresponding to the position outside the central axis of the fixed shaft. Each ring of threaded mounting holes includes the same number of threaded mounting holes 16 evenly distributed circumferentially around the central axis of the fixed shaft. The central axis of the threaded mounting holes 16 is parallel to the central axis of the fixed shaft. The threaded mounting holes 16 in each two adjacent rings are set one-to-one. The intersection of the central axis of the fixed shaft and the plane on the left side of the rotating plate 3 is defined as the center of the circle. The intersection of the central axis of each threaded mounting hole 16 and the plane on the left side of the rotating plate 3 is defined as the reference point. Among the reference points in each two adjacent rings, the line connecting the reference point in the inner ring and the corresponding reference point in the outer ring coincides with the center of the circle. Each mounting hole in each of the two rings of threaded mounting holes 16 is equipped with a positioning pin. The positioning pin includes a cylindrical pin segment 17 and a stud segment 18 connected sequentially from left to right and coaxially arranged. The stud segment 18 is threaded into the threaded mounting hole 16. By setting at least three threaded mounting holes 16 and installing locating pins in two of them, the measurement needs of pipes with various inner and / or outer diameters can be met by designing the distance between different layers of threaded mounting holes 16 and the central axis of the fixed shaft. For example, by setting four threaded mounting holes 16 and installing the outermost locating pin on the outermost threaded mounting hole 16, the pipe ends of three different sizes of pipes with the same outer diameter can be measured by selecting which layer of threaded mounting holes 16 to install the inner locating pin on. This provides strong applicability. In addition, with the detachable design of the clamping seat and rotating frame, different sizes of clamping seats and rotating frames can be flexibly combined according to actual measurement needs to meet the measurement requirements of pipe ends of different sizes, greatly improving the flexibility of use. In this embodiment, the threaded mounting hole 16 ring consists of three turns, each ring including six threaded mounting holes 16 evenly spaced circumferentially around the central axis of the fixed shaft. Preferably, the outer side of the cylindrical pin segment 17 and the end of the wing plate 1 away from the fixed shaft are coated with a paint layer of 0.05 mm to 0.1 mm thickness. Because the paint layer is extremely thin, it has virtually no impact on the measurement results. The paint layer prevents direct contact and wear between the cylindrical pin segment 17, the wing plate 1, and the wall of the measured pipe 22, thus preventing dimensional deviations in the cylindrical pin segment 17 and the wing plate 1 after multiple measurements and ensuring the accuracy of the measurement results. When the paint layer is worn away, it can simply be recoated. In this embodiment, the paint layer thickness is 0.05 mm.

[0025] As attached Figure 1 , 2As shown, a reinforcing connecting plate 19 is provided between the sleeve 2 and the rotating plate 3; several windows 20 are evenly distributed around the central axis of the fixed shaft along the circumference of the rotating plate 3. The reinforcing connecting plate 19 enhances the connection strength between the sleeve 2 and the rotating plate 3, and the windows 20 facilitate the rotation of the rotating plate 3 by manually turning the edge of the window 20, and also reduce the overall weight. Specifically, there are 6 windows.

[0026] The above technical features constitute the preferred embodiment of the present invention, which has strong adaptability and optimal implementation effect. Unnecessary technical features can be added or removed according to actual needs to meet the requirements of different situations.

Claims

1. A rapid measuring device for the end of a small-diameter pipe, characterized in that... The device includes a clamping seat that can be fitted into the pipe being measured and a rotating frame rotatably mounted on the clamping seat. The clamping seat includes a fixed shaft and wing plates. The fixed shaft is horizontally positioned, and at least three wing plates are evenly spaced circumferentially on the outer left side of the fixed shaft. The rotating frame includes a sleeve, a rotating plate, and locating pins. A sleeve that can rotate around the central axis of the fixed shaft is detachably and rotatably mounted on the right side of the fixed shaft. A rotating plate perpendicular to the central axis of the fixed shaft is fixedly connected to the sleeve. The left side of the rotating plate is a vertical plane perpendicular to the central axis of the fixed shaft. At least two rings of locating pins are arranged sequentially from the inside to the outside on the left side of the rotating plate. Each ring of locating pins includes N locating pins evenly distributed circumferentially around the central axis of the fixed shaft, where N is an even number. The space between the two rings of locating pins forms a space for accommodating the pipe end of the pipe being measured. The fixed shaft includes a cylindrical section connected sequentially from left to right and coaxially arranged, and a frustum section that is larger on the left and smaller on the right. The wing plates are fixedly connected to the outer side of the cylindrical section. The sleeve is located inside the sleeve. The sleeve has a through-hole, comprising a tapered section (larger on the left and smaller on the right), a straight section that smoothly transitions to the right end of the tapered section, and a connecting hole section that connects to the right end of the straight section. The sleeve is fitted onto the outside of the frustum section through the inner hole, with the inner wall of the tapered section in contact with the outer wall of the frustum section. A rotating plate is fixedly connected to the right end of the sleeve, and a mounting through hole is provided on the rotating plate corresponding to the position of the connecting hole. An L-shaped handle is inserted into the connecting hole and the mounting through hole. A first threaded hole is provided at the right end of the frustum section. A first threaded post is provided at one end of the L-shaped handle and is threadedly connected to the first threaded hole. A fixing sleeve fitted onto the outside of the L-shaped handle is fixedly connected to the right side of the rotating plate. The inner hole of the fixing sleeve is a second threaded hole that communicates with the mounting through hole. A second threaded post is provided at the other end of the L-shaped handle and can be threadedly connected to the second threaded hole. The diameter of the second threaded post is larger than the diameter of the first threaded post. A limiting boss is provided on the L-shaped handle corresponding to the right side of the fixing sleeve, with the left end face of the limiting boss in contact with the right end face of the fixing sleeve.

2. The rapid measuring device for small-diameter pipe ends according to claim 1, characterized in that... The angle between the generatrix of the conical surface of the frustum section and the central axis of the frustum section is ≤4 degrees; the angle between the generatrix of the inner wall of the conical hole section and the central axis of the conical hole section is ≤4 degrees; the length of the end of the wing plate away from the fixed point along the central axis parallel to the fixed axis is 8 mm to 12 mm.

3. The rapid measuring device for small-diameter pipe ends according to claim 1 or 2, characterized in that... On the left side of the rotating plate, located outside the central axis of the fixed shaft, there are at least three rings of threaded mounting holes spaced out from the inside. Each ring includes N threaded mounting holes evenly spaced circumferentially around the central axis of the fixed shaft. The central axis of the threaded mounting holes is parallel to the central axis of the fixed shaft. The threaded mounting holes in each pair of adjacent rings are set one-to-one. The intersection of the central axis of the fixed shaft and the plane containing the left side of the rotating plate is defined as the center. The intersection of the central axis of each threaded mounting hole and the plane containing the left side of the rotating plate is defined as the reference point. Among the reference points in each pair of adjacent rings, the line connecting the reference point in the inner ring and the corresponding reference point in the outer ring to the center coincides. Each mounting hole in each of the two rings of threaded mounting holes is equipped with a locating pin. The locating pin includes a cylindrical pin segment and a stud segment connected sequentially from left to right and coaxially arranged. The stud segment is threaded into the threaded mounting hole.

4. The rapid measuring device for small-diameter pipe ends according to claim 3, characterized in that... The outer side of the cylindrical pin section and the end of the wing plate away from the fixed axis are coated with a paint layer of 0.05 mm to 0.1 mm thickness.

5. The rapid measuring device for small-diameter pipe ends according to claim 1, 2, or 4, characterized in that... A reinforcing connecting plate is provided between the sleeve and the rotating plate; several windows are evenly distributed around the central axis of the fixed shaft on the rotating plate.

6. The rapid measuring device for small-diameter pipe ends according to claim 3, characterized in that... A reinforcing connecting plate is provided between the sleeve and the rotating plate; several windows are evenly distributed around the central axis of the fixed shaft on the rotating plate.

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