Thin-wall large pipe roundness measuring and correcting device

Abstract

The utility model belongs to the technical field of engineering measurement, and particularly relates to a thin-wall large pipe roundness measuring and correcting device. The device comprises a supporting part, a measuring part and a connecting part, the supporting part comprises a steel pipe and an adjusting screw rod, the steel pipe is of a hollow tubular structure, and a nut is arranged at the tail end; a thread is arranged at one end of the adjusting screw rod and is matched with the nut; the measuring part comprises a horizontal rotating rod, a dial indicator and a central shaft, the horizontal rotating rod is integrally of a columnar structure, and two ends of the horizontal rotating rod are connected with the dial indicator through dial indicator frames; the connecting part comprises disc plates, each disc plate comprises two cake-shaped steel plates with holes in the centers, and the central shaft is arranged between the disc plates; and the supporting part is connected with the disc plate through welding. The device not only can meet the roundness measurement requirement and precision of the large pipe, but also can correct the roundness out-of-tolerance part of the pipe, is simple and convenient to operate on site, is high in efficiency, is relatively high in economical efficiency and practicability, and can effectively guarantee the construction quality.

Description

Technical Field

[0001] The utility model belongs to the technical field of engineering surveying, and particularly relates to a device for measuring and correcting the roundness of a thin-walled large pipe. Background Art

[0002] In construction projects, large-diameter pipes, circular air ducts, container cylinders, etc. often have deviations or deformations during the manufacturing and hoisting processes, resulting in the roundness of the large pipes or cylinders not meeting the requirements, and thus unable to be normally assembled or fitted, increasing the construction difficulty accordingly. Generally, for the measurement of the roundness of large pipes, the measurement methods used are to find the diameter and pull a tape measure for measurement. Such measurement methods have large errors and great limitations; the conventional roundness correction methods are all based on the method of using a jack and a push rod. This correction method is slow and mostly can only correct locally, with unsatisfactory results. Content of the Utility Model

[0003] The technical problem to be solved by the utility model is to provide a device for measuring and correcting the roundness of a thin-walled large pipe in view of the above deficiencies in the prior art.

[0004] To solve the above problems, the technical solution of the utility model is as follows: A device for measuring and correcting the roundness of a thin-walled large pipe, the device includes a support part, a measurement part, and a connection part. The support part includes a steel pipe and an adjusting screw. The steel pipe has a hollow tubular structure and is provided with a nut at the end; one end of the adjusting screw is provided with a thread, and the thread is matched with the nut, so that the adjusting screw can control the length of the adjusting screw extending out of the nut by rotation; the measurement part includes a horizontal rotating rod, a dial indicator, and a central shaft. The horizontal rotating rod has an overall columnar structure, and both ends are connected to the dial indicator through a dial indicator bracket; the connection part includes a disc plate, and the disc plate includes two circular steel plates with a central hole. The central shaft is placed between the disc plates; the support part is connected to the disc plate by welding.

[0005] A protective plate is provided at the end of the adjusting screw.

[0006] The number of the support parts is [number], and they are evenly distributed circumferentially on the disc plate by welding.

[0007] The outer surface curvature of the protective plate is the same as the inner surface curvature of the large pipe to be measured.

[0008] The steel pipe is a thick-walled carbon steel pipe.

[0009] A bearing is provided between the disc plate and the central shaft.

[0010] The number of the bearings is two.

[0011] The measuring rod of the dial indicator is perpendicular to the inner surface of the large pipe to be measured, and the reading dial is horizontal and upward.

[0012] The inner diameter of the nut matches the screw.

[0013] The nut is connected to the steel pipe by welding.

[0014] The remarkable effect of the present utility model lies in that: after the device is placed at the center of the large pipe through the supporting part, the measuring part is rotated to obtain the roundness of the large pipe, and for the part with non-conforming roundness in the large pipe, it is corrected by adjusting the adjusting screw; the device can not only meet the roundness measurement requirements and accuracy of the large pipe, but also correct the part with out-of-tolerance roundness of the pipe, and the on-site operation is simple, efficient, with strong economy and practicability, and can effectively ensure the construction quality. Description of the Drawings

[0015] Figure 1 It is a schematic structural diagram of a thin-walled large pipe roundness measurement and correction device described in the present utility model;

[0016] Figure 2 It is a schematic use diagram of a thin-walled large pipe roundness measurement and correction device described in the present utility model;

[0017] In the figure: 1, steel pipe; 2, disc plate; 3, bearing; 4, central shaft; 5, horizontal rotating rod; 6, dial indicator; 7, dial indicator holder; 8, adjusting screw; 9, nut; 10, guard plate. Specific Embodiments

[0018] Next, the technical solutions in the present utility model will be clearly and completely described in conjunction with the drawings in the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present utility model without creative efforts belong to the scope of the present utility model.

[0019] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "upper" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplification, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present utility model.

[0020] In the description of the present utility model, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0021] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, terms such as "connection", "setting", "installation", "fixation", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0022] As Figure 1 shown, a thin-walled large pipe roundness measurement and correction device includes a support part, a measurement part and a connection part. The support part includes a steel pipe 1 and an adjusting screw 8. The steel pipe 1 has a hollow tubular structure, and a nut 9 is provided at the end. The steel pipe 1 and the nut 9 are coaxial. The outer diameter of the nut 9 is the same as that of the steel pipe 1, and the inner diameter of the nut 9 is smaller than that of the steel pipe 1. One end of the adjusting screw 8 is provided with a thread, and this thread matches the nut 9, so that the adjusting screw 8 can control the length of the adjusting screw 8 extending out of the nut 9 by rotation;

[0023] As an embodiment, a guard plate 10 is provided at the end of the adjusting screw 8;

[0024] As an embodiment, the outer surface curvature of the guard plate 10 is the same as the inner surface curvature of the large pipe to be measured;

[0025] As an embodiment, the steel pipe 1 is a thick-walled carbon steel pipe;

[0026] As an embodiment, the inner diameter of the nut 9 is 2 millimeters;

[0027] As an embodiment, the nut 9 is connected to the steel pipe 1 by welding;

[0028] The measurement part includes a horizontal rotating rod 5, a dial indicator 6, and a central shaft 4. The horizontal rotating rod 5 has an overall columnar structure, and both ends are connected to the dial indicator 6 through a dial indicator bracket 7. The measuring rod of the dial indicator 6 is perpendicular to the inner surface of the large pipe to be measured, and the reading dial is horizontally upward. The middle part of the horizontal rotating rod 5 is connected to the central shaft 4;

[0029] As an embodiment, the horizontal rotating rod 5 and the central shaft 4 are connected by welding;

[0030] As an embodiment, the horizontal rotating rod 5 and the central shaft 4 are connected by threads;

[0031] The connection part includes a disc plate 2. The disc plate 2 includes two circular plate-shaped steel plates with a central hole. The central shaft 4 is placed between the disc plates;

[0032] As an embodiment, two bearings 3 are provided between the disc plate 2 and the central shaft 4;

[0033] As an embodiment, the number of the supporting parts is eight, and the eight supporting parts are evenly welded circumferentially on the connecting part.

[0034] The installation and use instructions of the device include the following steps:

[0035] (1) After one end of each of the eight steel pipes 1 of the supporting part is welded to the nut 9, the eight steel pipes are symmetrically and evenly welded to the bottom disc of the disc plate 2, and then the two bearings 3 are respectively assembled onto the disc plate 2;

[0036] (2) After being assembled through the central shaft 4 and the bearings 3 of the disc plate 2, they are connected into a whole;

[0037] (3) The horizontal rotating rod 5 is fixedly installed on the central shaft 4 by welding;

[0038] (4) The dial indicator bracket 7 is installed at both ends of the horizontal rotating rod 5, and then the dial indicator 6 is installed on the dial indicator bracket 7, and the measuring rod of the dial indicator 6 is perpendicular to the inner surface of the large pipe to be measured, and the reading dial is horizontally upward;

[0039] (5) The adjusting screw rod 8 with a guard plate 10 at the end is screwed into the nut 9 at the end of the steel pipe 1;

[0040] (6) The whole device is placed inside the thin-walled large pipe to be measured and corrected. By adjusting the adjusting screw rod 8, the device is fixed on the inner wall of the large pipe, and the central shaft 4 is placed at the center of the large pipe by adjusting the adjusting screw rod 8;

[0041] (7) Adjust the dial indicator 6 to zero;

[0042] (8) The operator slowly rotates the horizontal rotating rod 5, measures and records the reading of the dial indicator once every 90°. To reduce the operation error, several groups of data should be obtained through multiple measurements, and then the relative deviation value is calculated based on the measurement data;

[0043] (9) The device corrects the position where the roundness of the large pipe exceeds the tolerance. By adjusting the adjusting screw rod 8, the inner wall roundness of the large pipe is adjusted, and the roundness can be measured at the same time until the roundness of the large pipe is adjusted to meet the requirements.

[0044] Effect advantages:

[0045] 1) The manufacturing process of the device is simple. The components are made of ordinary steel pipes, carbon steel plates, screw rods and bearings, and the manufacturing cost is low.

[0046] 2) The external structure of the device is simple, and it is easy to disassemble, assemble, transport, and the use operation is extremely simple and flexible. Generally, two people can complete the manufacturing, disassembly, moving and use operation of the device.

[0047] 3) The device can select the length of the carbon steel pipe according to the actual size of the pipe to be measured on-site and determine the position of the meter frame. Therefore, the device can fully meet the requirements for roundness measurement and correction of large pipes with different diameters on-site.

[0048] 4) Dial indicators are installed at both ends of the horizontal rotating rod of the device, which can eliminate the deviation caused by the disc plate not being at the center of the large pipe.

[0049] 5) The device can be made according to the actual needs of the engineering site, and is applicable to the measurement and correction of pipes with different diameters, circular air ducts, and container cylinder sections. The measurement accuracy that can be achieved is also relatively high. The device has a wide range of applications, is economical and reliable, and can fully guarantee the work quality, so it is very worthy of popularization and application.

[0050] Inspired by the above ideal embodiments of the present invention, through the above description, relevant staff can completely make various changes and modifications without departing from the technical idea of the present invention. The technical scope of the present invention is not limited to the content in the specification, and its technical scope must be determined according to the scope of the claims.

Claims

1. A device for measuring and correcting the roundness of a thin-walled large tube, characterized in that: The device comprises a supporting part, a measuring part and a connecting part. The supporting part comprises a steel pipe (1) and an adjusting screw (8). The steel pipe (1) is in a hollow tubular structure and a nut (9) is provided at the end. One end of the adjusting screw (8) is provided with a thread, and the thread matches the nut (9), so that the adjusting screw (8) can control the length of the adjusting screw (8) extending out of the nut (9) by rotation. The measuring part comprises a horizontal rotating rod (5), a dial indicator (6) and a central axis (4). The horizontal rotating rod (5) is in a columnar structure as a whole, and its two ends are connected to the dial indicator (6) through a dial indicator frame (7). The connecting part comprises a disc plate (2), and the disc plate (2) comprises two circular pancake-shaped steel plates with a central opening, and the central axis (4) is placed between the disc plates. The supporting part is connected to the disc plate (2) by welding.

2. A device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: A guard plate (10) is provided at the end of the adjusting screw rod (8).

3. A device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: The number of the support parts is (8), which are evenly distributed circumferentially on the disc plate (2) by welding.

4. A device for measuring and correcting the roundness of a thin-walled large tube according to claim 2, characterized in that: The curvature of the outer surface of the guard plate (10) is the same as the curvature of the inner surface of the large pipe to be measured.

5. The device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: The steel pipe (1) is a thick-walled carbon steel pipe.

6. A device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: A bearing (3) is provided between the disc plate (2) and the central shaft (4).

7. A thin-walled large tube roundness measurement and correction device according to claim 6, characterized in that: The number of the bearings (3) is two.

8. The device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: The measuring rod of the dial gauge (6) is perpendicular to the inner surface of the large pipe to be measured, and the reading dial is horizontally facing upwards.

9. The device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: The inner diameter of the nut (9) matches that of the screw.

10. The device for measuring and correcting the roundness of a thin-walled large tube according to claim 1, characterized in that: The nut (9) is connected to the steel pipe (1) by welding.

Images