A method for measuring roundness of a large-diameter circular pipe

Abstract

The application provides a kind of detection method for measuring roundness of large-diameter circular pipeline, relating to pipeline detection technical field, including support column, the lower end of the support column is fixedly installed with first disc, the lower surface of the first disc is fixedly installed with detection head, the side of the detection head is equidistantly provided with a plurality of infrared detection heads, the middle part of the support column is provided with positioning assembly for positioning the device, the middle part of the support column is provided with telescopic support assembly, the support column is arranged in the middle part of the circular pipeline to rotate the rotating disc, which can make a plurality of connecting rods turn over to the end away from the support column, at this time, a plurality of connecting discs can be moved outward at the same time, at this time, a plurality of connecting discs can be attached to the inner wall of the circular pipeline, so that the support column can be located in the middle of the circular pipeline, the device can detect different specifications of circular pipeline, and the detection head can be located at the center position of the circular pipeline to ensure the detection efficiency.

Description

Technical Field

[0001] This invention relates to the field of pipeline inspection technology, specifically a method for measuring the roundness of large-diameter circular pipelines. Background Technology

[0002] Roundness refers to the degree to which the cross-section of a workpiece approximates a theoretical circle. When the difference between the maximum and minimum radii is 0, the roundness is 0. After the pipe is processed, in order to ensure the quality of the pipe, various tests need to be performed on the pipe material. Pipe roundness testing is one of the pipe tests. Currently, when performing roundness testing on the inner wall of a pipe, it is inconvenient to test pipes of different specifications. The test head cannot be located in the exact center of the pipe, which will affect the testing structure. Summary of the Invention

[0003] (a) Technical problems to be solved

[0004] To address the shortcomings of existing technologies, this invention provides a method for measuring the roundness of large-diameter circular pipes. This method solves the problems of inconvenience in measuring the roundness of pipe inner walls, which is not suitable for pipes of different specifications, and the inability of the detection head to be positioned at the exact center of the pipe, thus affecting the testing structure.

[0005] (II) Technical Solution

[0006] To achieve the above objectives, the present invention provides the following technical solution: a detection device for measuring the roundness of a large-diameter circular pipe, comprising a support column, a first disc fixedly installed at the lower end of the support column, a detection head fixedly installed on the lower surface of the first disc, a plurality of infrared detection heads equidistantly arranged on the side of the detection head, a positioning component for positioning the device in the middle of the support column, and a telescopic support component in the middle of the support column.

[0007] Preferably, a turntable is fixedly installed at the middle of one end of the support column.

[0008] Preferably, the telescopic support assembly includes a through hole, and the support column has a through hole extending through its middle portion.

[0009] Preferably, a sliding column is slidably installed in the middle of the through hole, and a pull plate is fixedly installed at the upper end of the sliding column.

[0010] Preferably, the inner wall of the through hole is provided with an internal thread, and both ends of the slide are provided with external threads, which mesh with the internal threads.

[0011] Preferably, the positioning component includes a bidirectional thread, and the two ends of the support column are provided with bidirectional threads, and two lead screw sleeves are sleeved and installed in the middle of the bidirectional thread.

[0012] Preferably, each of the two lead screw sleeves has a plurality of first mounting grooves extending through it. A first rotating shaft is rotatably mounted between the inner walls on both sides of each first mounting groove. A connecting rod is mounted on the side of each first rotating shaft, and a connecting disc is mounted between the connecting rods.

[0013] Preferably, a second mounting groove is provided through the middle of the connecting plate, and two second rotating shafts are rotatably installed between the inner walls on both sides of the second mounting groove. Both connecting rods are provided on the side of the second rotating shafts. A third mounting groove is provided on one side of the connecting plate, and rollers are rotatably installed between the inner walls on both sides of the third mounting groove.

[0014] Preferably, a second disc is fixedly installed at the lower middle part of the support column, and a guide rod is fixedly installed between the first disc and the second disc, the guide rod sliding through the lead screw sleeve.

[0015] As a preferred option, the specific operating steps are as follows;

[0016] S1; Place the processed circular pipe in a suitable position and fix it with a fixing clamp to prevent the circular pipe from shifting during inspection, which would affect the inspection efficiency.

[0017] S2; At this point, the support column is set in the middle of the circular pipe. The worker holds the first disc with one hand and rotates the turntable with the other hand, causing the two lead screw sleeves to move towards each other in the middle of the bidirectional thread. This allows several connecting rods to flip away from the support column, and several connecting discs to move outward simultaneously, thus fitting the connecting discs against the inner wall of the circular pipe.

[0018] S3; This allows the support column to be positioned in the center of the circular pipe, thus positioning the detection head and infrared detection head at the center of the circular pipe. The circularity of the pipe can then be detected by the detection head and infrared detection head working together.

[0019] S4; When inspecting other parts of the inner wall of a circular pipe, the connecting plate is attached to the inner wall of the circular pipe, and the roller is also attached to the inner wall of the circular pipe. At this time, by rotating the slide column, the external thread at one end of the slide column is disengaged from the internal thread, allowing the slide column to slide out from the middle of the support column. Then, the external thread at the other end of the slide column is moved to the position of the internal thread. Rotating the slide column again causes the external thread to engage with the internal thread, connecting the slide column and the support column. Pushing the slide column at this time will simultaneously push the roller to move on the inner wall of the circular pipe, allowing inspection of other parts of the inner wall of the circular pipe.

[0020] This invention provides a method for measuring the roundness of large-diameter circular pipes. It has the following advantages:

[0021] 1. The support column is positioned in the middle of the circular pipe. The operator holds the first disc with one hand and rotates the turntable with the other, causing the two lead screws to move closer together in the bidirectional thread. This causes several connecting rods to flip away from the support column, simultaneously moving several connecting discs outwards. This allows the connecting discs to adhere to the inner wall of the circular pipe, positioning the support column in the center of the pipe. This places the detection head and infrared detection head at the center of the circular pipe. The roundness of the pipe can then be detected using these two sensors. This device can detect circular pipes of different specifications and ensures the detection head is centered, guaranteeing efficient detection.

[0022] 2. When inspecting other parts of the inner wall of a circular pipe, the connecting plate is attached to the inner wall of the pipe, and the roller is also attached to the inner wall of the pipe. At this time, by rotating the slide column, the external thread at one end of the slide column is disengaged from the internal thread, allowing the slide column to slide out from the middle of the support column. Then, the external thread at the other end of the slide column is moved to the position of the internal thread. Rotating the slide column again causes the external thread to engage with the internal thread, connecting the slide column to the support column. Pushing the slide column will simultaneously move the roller along the inner wall of the circular pipe, allowing for the inspection of other parts of the inner wall of the circular pipe. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of the present invention;

[0024] Figure 2 This is a schematic diagram of the overall side view of the internal structure of the present invention;

[0025] Figure 3 This is a schematic diagram of the lead screw sleeve structure in this invention;

[0026] Figure 4 This is a front view schematic diagram of the connecting disk structure in this invention;

[0027] Figure 5 This is a schematic diagram of the support column structure in this invention;

[0028] Figure 6 This is a schematic diagram of the sliding column structure in this invention.

[0029] The components include: 1. Support column; 2. Telescopic support assembly; 201. Pull plate; 202. Through hole; 203. Internal thread; 204. Sliding column; 205. External thread; 3. Turntable; 4. First disc; 5. Guide rod; 6. Positioning assembly; 601. Screw sleeve; 602. Connecting rod; 603. Connecting disc; 604. Bidirectional thread; 605. First mounting groove; 606. First rotating shaft; 607. Second mounting groove; 608. Second rotating shaft; 609. Third mounting groove; 610. Roller; 7. Second disc; 8. Detection head; 9. Infrared detection head. Detailed Implementation

[0030] 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. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0031] like Figure 1 , 2 As shown, this embodiment of the invention provides a detection device for measuring the roundness of a large-diameter circular pipe, including a support column 1, a first disc 4 fixedly installed at the lower end of the support column 1, a detection head 8 fixedly installed on the lower surface of the first disc 4, a plurality of infrared detection heads 9 equidistantly arranged on the side of the detection head 8, a positioning component 6 for positioning the device in the middle of the support column 1, and a telescopic support component 2 in the middle of the support column 1.

[0032] like Figure 1 As shown, a turntable 3 is fixedly installed at the middle of one end of the support column 1.

[0033] like Figure 2 , 5As shown in Figure 6, the telescopic support assembly 2 includes a through hole 202. A through hole 202 is formed through the middle of the support column 1. A sliding column 204 is slidably installed in the middle of the through hole 202. A pull plate 201 is fixedly installed on the upper end of the sliding column 204. An internal thread 203 is provided on the inner wall of the through hole 202. External threads 205 are provided on both sides of the sliding column 204. The external threads 205 mesh with the internal threads 203. When the connecting plate 603 is attached to the inner wall of the circular pipe, the roller 610 will simultaneously be attached to the inner wall of the circular pipe. At this time, by rotating the sliding column 204, the external threads 205 and internal threads 203 at one end of the sliding column 204 are disengaged. Because the support column 1 has a through hole 202 in the middle, the through hole 202... A sliding column 204 is slidably installed in the middle, and a pull plate 201 is fixedly installed on the upper end of the sliding column 204. An internal thread 203 is provided on the inner wall of the through hole 202. External threads 205 are provided on both sides of the sliding column 204. The external threads 205 and the internal threads 203 are engaged and connected. At this time, the sliding column 204 can slide out from the middle of the support column 1. Then, the external thread 205 at the other end of the sliding column 204 is moved to the position of the internal thread 203. At this time, the sliding column 204 is rotated so that the external thread 205 moves to the position of the internal thread 203 and engages and connects. At this time, the sliding column 204 can be connected to the support column 1. Pushing the sliding column 204 can simultaneously push the roller 610 to move on the inner wall of the circular pipe. At this time, other parts of the inner wall of the circular pipe can be inspected.

[0034] like Figure 2 , 3As shown in Figures 4 and 5, the positioning component 6 includes a bidirectional thread 604. The support column 1 has bidirectional threads 604 on both sides. Two lead screw sleeves 601 are fitted into the middle of the bidirectional thread 604. Each lead screw sleeve 601 has several first mounting grooves 605 extending through it. A first rotating shaft 606 is rotatably mounted between the inner walls of both sides of each first mounting groove 605. A connecting rod 602 is mounted on the side of each first rotating shaft 606. A connecting plate 603 is installed between the connecting rods 602. A second mounting groove 607 extends through the middle of the connecting plate 603. Two second rotating shafts 608 are rotatably mounted between the inner walls of both sides of the second mounting groove 607. The two connecting rods 608... 02 are all set on the side of the second rotating shaft 608. A third mounting groove 609 is opened on one side of the connecting plate 603. Rollers 610 are rotatably installed between the inner walls of the two sides of the third mounting groove 609. A second disc 7 is fixedly installed at the lower middle part of the support column 1. A guide rod 5 is fixedly installed between the first disc 4 and the second disc 7. The guide rod 5 slides through the screw thread sleeve 601, setting the support column 1 in the middle of the circular pipe. At this time, the worker holds the first disc 4 with one hand and rotates the rotating disc 3 with the other hand, so that the two screw thread sleeves 601 move towards each other in the middle of the bidirectional thread 604. And because the two ends of the support column 1 are provided with bidirectional threads 604, the bidirectional threads 604 04 Two lead screw sleeves 601 are installed in the middle. Each lead screw sleeve 601 has several first mounting grooves 605 extending through it. A first rotating shaft 606 is rotatably mounted between the inner walls of both sides of each first mounting groove 605. A connecting rod 602 is mounted on the side of each first rotating shaft 606. A connecting plate 603 is installed between the connecting rods 602. A second mounting groove 607 extends through the middle of the connecting plate 603. Two second rotating shafts 608 are rotatably mounted between the inner walls of both sides of the second mounting groove 607. The two connecting rods 602 are located on the side of each second rotating shaft 608. A third mounting groove 609 is formed on one side of the connecting plate 603. The inner walls of the third mounting groove 609 are... A roller 610 is rotatably installed between the support column 1 and the second disc 7 is fixedly installed at the lower middle part of the support column 1. A guide rod 5 is fixedly installed between the first disc 4 and the second disc 7. The guide rod 5 slides through the screw sleeve 601, which allows several connecting rods 602 to flip away from the support column 1. This allows several connecting discs 603 to move outward simultaneously, so that the several connecting discs 603 can be attached to the inner wall of the circular pipe, so that the support column 1 can be located in the middle of the circular pipe. This allows the detection head 8 and the infrared detection head 9 to be located in the center of the circular pipe. At this time, the roundness of the circular pipe can be detected by the detection head 8 and the infrared detection head 9.

[0035] A method for measuring the roundness of a large-diameter circular pipe, the specific operation steps of which are as follows;

[0036] S1; Place the processed circular pipe in a suitable position and fix it with a fixing clamp to prevent the circular pipe from shifting during inspection, which would affect the inspection efficiency.

[0037] S2; At this time, the support column 1 is set in the middle of the circular pipe. The worker holds the first disc 4 with one hand and rotates the rotating disc 3 with the other hand, so that the two screw sleeves 601 move towards each other in the middle of the bidirectional thread 604. At this time, several connecting rods 602 can be flipped away from the support column 1. At this time, several connecting discs 603 can be moved outward at the same time, so that several connecting discs 603 can be attached to the inner wall of the circular pipe.

[0038] S3; This allows the support column 1 to be positioned in the middle of the circular pipe, thus enabling the detection head 8 and infrared detection head 9 to be located at the center of the circular pipe. At this point, the detection head 8 and infrared detection head 9 work together to detect the roundness of the circular pipe.

[0039] S4; When inspecting other parts of the inner wall of a circular pipe, the connecting plate 603 is attached to the inner wall of the circular pipe, and the roller 610 is also attached to the inner wall of the circular pipe. At this time, the sliding column 204 is rotated to disengage the external thread 205 and internal thread 203 at one end of the sliding column 204, allowing the sliding column 204 to slide out from the middle of the support column 1. The external thread 205 at the other end of the sliding column 204 is then moved to the position of the internal thread 203. The sliding column 204 is then rotated to make the external thread 205 engage with the internal thread 203, thus connecting the sliding column 204 to the support column 1. Pushing the sliding column 204 will simultaneously push the roller 610 to move on the inner wall of the circular pipe, allowing inspection of other parts of the inner wall of the circular pipe.

[0040] Working principle: The support column 1 is placed in the middle of the circular pipe. The operator holds the first disc 4 with one hand and rotates the rotating disc 3 with the other, causing the two threaded sleeves 601 to move closer together in the middle of the bidirectional thread 604. Because the support column 1 has bidirectional threads 604 on both sides, two threaded sleeves 601 are fitted in the middle of the bidirectional threads 604. Several first mounting grooves 605 are drilled through each threaded sleeve 601. A first rotating shaft 606 is rotatably mounted between the inner walls of both sides of each first mounting groove 605. A connecting rod 602 is mounted on the side of each first rotating shaft 606. A connecting plate 603 is installed between the connecting rods 602. A second mounting groove 607 is provided through the middle of the 03. Two second rotating shafts 608 are rotatably mounted between the inner walls of the two sides of the second mounting groove 607. Two connecting rods 602 are located on the sides of the second rotating shafts 608. A third mounting groove 609 is provided on one side of the connecting plate 603. Rollers 610 are rotatably mounted between the inner walls of the two sides of the third mounting groove 609. A second disc 7 is fixedly mounted at the lower middle part of the support column 1. A guide rod 5 is fixedly mounted between the first disc 4 and the second disc 7. The guide rod 5 slides through the screw sleeve 601. At this time, several connecting rods 602 can be flipped away from the end of the support column 1. At this time, several connecting plates 603 can be moved outward simultaneously. Several connecting discs 603 are attached to the inner wall of the circular pipe, allowing the support column 1 to be positioned in the center of the circular pipe. This positions the detection head 8 and infrared detection head 9 at the center of the circular pipe. The roundness of the circular pipe can then be detected by the detection head 8 and infrared detection head 9. With the connecting discs 603 attached to the inner wall of the circular pipe, the roller 610 also attaches to the inner wall. The operation rotates the sliding column 204, disengaging the external thread 205 from the internal thread 203 at one end of the sliding column 204. Since the support column 1 has a through hole 202 in its middle, the sliding column 204 is slidably mounted in the middle of the through hole 202. The sliding column 204... A pull plate 201 is fixedly installed at one end. An internal thread 203 is provided on the inner wall of the through hole 202. External threads 205 are provided on both sides of the sliding column 204. The external threads 205 engage with the internal threads 203, allowing the sliding column 204 to slide out from the middle of the support column 1. Moving the external thread 205 at the other end of the sliding column 204 to the position of the internal thread 203, and then rotating the sliding column 204 to engage the external thread 205 with the internal thread 203, connects the sliding column 204 to the support column 1. Pushing the sliding column 204 simultaneously moves the roller 610 along the inner wall of the circular pipe, enabling the inspection of other parts of the inner wall of the circular pipe.

[0041] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. For those skilled in the art, other variations or modifications can be made based on the above description. It is impossible to exhaustively list all the implementation methods here. All obvious variations or modifications derived from the technical solutions of the present invention are still within the protection scope of the present invention.

[0042] Although embodiments of the invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A testing device for measuring the roundness of a large-diameter circular pipe, comprising a support column (1), characterized in that: The support column (1) is fixedly installed with a first disc (4) at its lower end. A detection head (8) is fixedly installed on the lower surface of the first disc (4). Several infrared detection heads (9) are equidistantly arranged on the side of the detection head (8). A positioning component (6) for positioning this device is provided in the middle of the support column (1). A telescopic support component (2) is provided in the middle of the support column (1). The telescopic support assembly (2) includes a through hole (202), and the support column (1) has a through hole (202) through its middle section. A sliding column (204) is slidably installed in the middle of the through hole (202), and a pull plate (201) is fixedly installed at the upper end of the sliding column (204). The inner wall of the through hole (202) is provided with an internal thread (203), and both sides of the sliding column (204) are provided with external threads (205), which are engaged with the internal threads (203); The positioning component (6) includes a bidirectional thread (604), and the two sides of the support column (1) are provided with bidirectional threads (604). Two screw sleeves (601) are sleeved and installed in the middle of the bidirectional thread (604). Both of the lead screw sleeves (601) are provided with a plurality of first mounting grooves (605), and a first rotating shaft (606) is rotatably mounted between the inner walls on both sides of each first mounting groove (605). A connecting rod (602) is mounted on the side of each first rotating shaft (606), and a connecting plate (603) is mounted between the connecting rods (602). The connecting plate (603) has a second mounting groove (607) through the middle. Two second rotating shafts (608) are rotatably installed between the inner walls on both sides of the second mounting groove (607). The two connecting rods (602) are both located on the side of the second rotating shafts (608). A third mounting groove (609) is opened on one side of the connecting plate (603). Rollers (610) are rotatably installed between the inner walls on both sides of the third mounting groove (609). A second disc (7) is fixedly installed at the lower middle part of the support column (1), and a guide rod (5) is fixedly installed between the first disc (4) and the second disc (7). The guide rod (5) slides through the screw sleeve (601).

2. The detection device for measuring the roundness of a large-diameter circular pipe according to claim 1, characterized in that: A turntable (3) is fixedly installed at the middle of one end of the support column (1).

3. A method for measuring the roundness of a large-diameter circular pipe, characterized in that: The specific operating steps are as follows; S1; Place the processed circular pipe in a suitable position and fix it with a fixing clamp to prevent the circular pipe from shifting during inspection, which would affect the inspection efficiency. S2; At this time, the support column (1) is set in the middle of the circular pipe. At this time, the worker holds the first disc (4) with one hand and rotates the turntable (3) with the other hand, so that the two screw sleeves (601) move towards each other in the middle of the bidirectional thread (604). At this time, several connecting rods (602) can be flipped away from the support column (1). At this time, several connecting discs (603) can be moved outward at the same time. At this time, several connecting discs (603) can be attached to the inner wall of the circular pipe. S3; Make the support column (1) located in the middle of the circular pipe, so that the detection head (8) and the infrared detection head (9) can be located in the center of the circular pipe. At this time, the detection head (8) and the infrared detection head (9) work to detect the roundness of the circular pipe. S4; When it is necessary to inspect other parts of the inner wall of the circular pipe, the connecting plate (603) is attached to the inner wall of the circular pipe, and the roller (610) is attached to the inner wall of the circular pipe at the same time. At this time, by rotating the sliding column (204), the external thread (205) at one end of the sliding column (204) is disengaged from the internal thread (203), and the sliding column (204) can slide out from the middle of the support column (1). Then, the external thread (205) at the other end of the sliding column (204) is moved to the position of the internal thread (203). At this time, the sliding column (204) is rotated to move the external thread (205) to the position of the internal thread (203) and engage. At this time, the sliding column (204) can be connected to the support column (1). Pushing the sliding column (204) can simultaneously push the roller (610) to move on the inner wall of the circular pipe, and other parts of the inner wall of the circular pipe can be inspected.

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