High-precision inner hole straightness detection equipment

Abstract

The invention discloses high-precision inner hole straightness detection equipment, and relates to the technical field of detection equipment, the high-precision inner hole straightness detection equipment comprises a detection pipe and a driving mechanism, the detection pipe is sleeved with a movable sleeve, the movable sleeve is provided with a plurality of detection units, each detection unit comprises a mounting seat, a rotating shaft, a torsion spring, a rotating seat, a fan-shaped detection block and a detection piece, the mounting seat is fixed on the movable sleeve, and the rotating shaft is fixed on the rotating seat. The rotating shaft is fixed on the mounting seat, the torsion spring sleeves the rotating shaft, one end of the torsion spring is fixed on the rotating shaft, the other end of the torsion spring is fixed on the rotating seat, the rotating seat sleeves the rotating shaft, the rotating seat can rotate along the rotating shaft when being subjected to external force, the fan-shaped detection block is fixed on the outer side of the rotating seat, and the detection piece is used for detecting the rotation degree of the fan-shaped detection block. The driving mechanism is used for driving the movable sleeve to move along the detection pipe. The detection equipment is high in detection precision.

Description

Technical Field

[0001] This invention relates to the field of testing equipment technology, and in particular to a high-precision internal hole straightness testing device. Background Technology

[0002] Metal circular tubes have a hollow cross-section, and their length is generally much greater than their diameter or circumference. They have a wide range of applications, including conveying materials, exchanging heat energy, and manufacturing mechanical parts. When applied to fields with strict dimensional requirements, such as aerospace, the shape, size, and straightness of the pipe's inner bore are particularly important. Although there are already devices in the industry for measuring the straightness of pipe inner bores, their accuracy is insufficient and the testing results are unsatisfactory. Summary of the Invention

[0003] In view of the shortcomings of the existing technology, the purpose of this invention is to provide a high-precision internal hole straightness testing device to solve the problem of insufficient testing accuracy.

[0004] The objective of this invention is achieved through the following technical solution:

[0005] A high-precision internal hole straightness testing device includes a testing tube and a driving mechanism. The testing tube is fitted with a movable sleeve, and the movable sleeve is provided with multiple testing units. The multiple testing units are equidistantly distributed in a ring along the outer wall of the movable sleeve. Each testing unit includes a mounting base, a rotating shaft, a torsion spring, a rotating seat, a sector-shaped testing block, and a testing element. The mounting base is fixed to the movable sleeve, the rotating shaft is fixed to the mounting base, the torsion spring is sleeved on the rotating shaft, one end of which is fixed to the rotating shaft and the other end is fixed to the rotating seat, the rotating seat is sleeved on the rotating shaft, and the rotating seat can rotate along the rotating shaft when subjected to external force, the sector-shaped testing block is fixed to the outside of the rotating seat, and the testing element is used to detect the degree of rotation of the sector-shaped testing block. The driving mechanism is used to drive the movable sleeve to move along the testing tube.

[0006] Furthermore, the multiple sector-shaped detection blocks are distributed in a ring at equal intervals, and the distance between adjacent sector-shaped detection blocks is 2-3 cm.

[0007] Furthermore, a deburring component is fixedly fitted onto the movable sleeve. The deburring component is annular and has several dividing holes that divide it into multiple fan-shaped components. The middle positions of the multiple fan-shaped components are connected as one unit, and a deburring brush is provided on the outer edge of the deburring component.

[0008] Furthermore, the deburring component is located at the front end of the plurality of detection units.

[0009] Furthermore, the device includes a movable rod with a fixed plate fixedly fitted on it. The movable rod and the fixed plate are fitted inside the detection tube. A protruding connecting block is fixed to the outer periphery of the fixed plate. The detection tube has multiple elongated holes along its length, which are equidistantly distributed in a ring. The connecting block passes through the elongated holes and is fixedly connected to the inner wall of the movable sleeve. The driving mechanism is used to drive the movable rod to move inside the detection tube, and the movable rod drives the movable sleeve to move along the outer wall of the detection tube.

[0010] Furthermore, there are multiple fixing plates, which are equidistantly fixed to the movable rod, and each fixing plate has a connecting block on its outer periphery.

[0011] Furthermore, the detection element includes multiple pull rope sensors, which are fixed to a fixed plate and are distributed equidistantly in a ring on the fixed plate.

[0012] The movable sleeve has multiple annularly distributed through holes. An extension rod is fixed to the bottom of the rotating seat. The extension rod passes through the through holes and extends into the detection tube. The pull rope sensor is located on one side of the extension rod, and the pull rope end of the pull rope sensor is fixed to the extension rod.

[0013] Furthermore, the extension rod is disposed between the two fixed plates, and the pull rope sensor is fixed on one of the fixed plates. The number of pull rope sensors is the same as the number of extension rods.

[0014] Furthermore, it includes a mounting bracket, on which one end of the detection tube is fixed.

[0015] Furthermore, the drive mechanism is fixed to the fixed frame.

[0016] The beneficial effects of this invention are:

[0017] This invention uses multiple detection elements and multiple sector-shaped detection blocks to detect pipe wall information at different positions of the sector-shaped detection blocks, thereby obtaining the inner wall information of the entire circumference of the pipe. Based on the rotation angle of the sector-shaped detection blocks, the pipe diameter can be calculated. At the same time, by comparing the rotation angles of multiple sector-shaped detection blocks, the straightness of each section of the inner wall of the pipe can be calculated, which facilitates further grinding or processing. The number of sector-shaped detection blocks determines the detection accuracy; the more blocks there are, the higher the detection accuracy. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the structure of the high-precision internal hole straightness testing device of the present invention;

[0019] Figure 2This is a partial cross-sectional view of the high-precision internal hole straightness testing device of the present invention;

[0020] Figure 3 This is an exploded view of the high-precision internal hole straightness testing device of the present invention.

[0021] In the diagram: 1. Detection tube; 2. Movable sleeve; 3. Detection unit; 31. Mounting base; 32. Rotating shaft; 33. Torsion spring; 34. Rotating seat; 35. Fan-shaped detection block; 36. Pull rope sensor; 37. Extension rod; 4. Deburring part; 5. Dividing hole; 6. Fan-shaped part; 7. Deburring brush; 8. Movable rod; 9. Fixing plate; 10. Connecting block; 11. Long hole; 12. Through hole. Detailed Implementation

[0022] To make the technical problems solved by the invention, the technical solutions and the beneficial effects clearer, the invention will be further described below in conjunction with the accompanying drawings and embodiments.

[0023] like Figure 1-3 As shown, the present invention provides a high-precision internal hole straightness testing device, including a testing tube 1 and a driving mechanism. The testing tube 1 is covered with a movable sleeve 2, and the movable sleeve 2 is provided with multiple testing units 3. The multiple testing units 3 are distributed equidistantly in a ring along the outer wall of the movable sleeve 2. The testing unit 3 includes a mounting base 31, a rotating shaft 32, a torsion spring 33, a rotating seat 34, a sector-shaped testing block 35, and a testing element. The mounting base 31 is fixed on the movable sleeve 2, the rotating shaft 32 is fixed on the mounting base 31, the torsion spring 33 is sleeved on the rotating shaft 32, one end of which is fixed on the rotating shaft 32 and the other end is fixed on the rotating seat 34. The rotating seat 34 is sleeved on the rotating shaft 32 and can rotate along the rotating shaft 32 when subjected to external force. The sector-shaped testing block 35 is fixed on the outside of the rotating seat 34. The testing element is used to detect the degree of rotation of the sector-shaped testing block 35. The driving mechanism is used to drive the movable sleeve 2 to move along the testing tube 1.

[0024] The rotating seat 34 has a space to accommodate the torsion spring 33. The rotating seat 34 is simultaneously fitted onto the torsion spring 33 and the rotating shaft 32. When the rotating seat 34 is not under force, it remains stationary relative to the rotating shaft 32 under the action of the torsion spring 33. When the force on the rotating seat 34 changes, the torsion spring 33 will drive the rotating seat 34 back to its original state. There are multiple detection elements used to detect the pipe wall information at different positions of the sector detection blocks 35. The pipe diameter can be calculated based on the rotation angle of the sector detection blocks 35. At the same time, the control mechanism compares the rotation angles of multiple sector detection blocks 35 to calculate the straightness of the pipe inner wall. When all rotation angles are the same or within a specific error range, the straightness of the pipe inner wall can be determined to meet the standard.

[0025] Multiple sector-shaped detection blocks 35 are distributed in a ring at equal intervals, with a distance of 2-3 cm between adjacent sector-shaped detection blocks 35. During the movement, the sector-shaped detection blocks 35 are always in contact with the inner wall of the pipe and undergo conical deformation due to the contact with the inner wall. The rotation of multiple sector-shaped detection blocks 35 is independent and does not affect each other. The number of sector-shaped detection blocks 35 determines the detection accuracy; the more blocks, the higher the detection accuracy. It should be noted that the number of sector-shaped detection blocks 35 should not be less than six.

[0026] The movable sleeve 2 is fixedly fitted with a deburring part 4. The deburring part 4 is ring-shaped and has several dividing holes 5. The dividing holes 5 divide the deburring part 4 into multiple fan-shaped parts 6. The middle positions of the multiple fan-shaped parts 6 are connected as one piece. The outer edge of the deburring part 4 is provided with a deburring brush 7.

[0027] The deburring component 4 is located at the front end of multiple detection units 3. Before detecting the information on the inner wall of the pipe, the deburring component 4 is used to grind the inner wall of the pipe to remove dust, burrs, etc., so as to avoid these impurities from interfering with the detection results.

[0028] The present invention includes a movable rod 8, on which a fixing plate 9 is fixedly sleeved. The movable rod 8 and the fixing plate 9 are sleeved inside the detection tube 1. A protruding connecting block 10 is fixed on the outer periphery of the fixing plate 9. The detection tube 1 has a plurality of elongated holes 11 along its length direction. The plurality of elongated holes 11 are distributed equidistantly in a ring. The connecting block 10 passes through the elongated holes 11 and is fixedly connected to the inner wall of the movable sleeve 2. A driving mechanism is used to drive the movable rod 8 to move inside the detection tube 1. The movable rod 8 drives the movable sleeve 2 to move along the outer wall of the detection tube 1.

[0029] The fixing plate 9 is annular, and the outer periphery of the fixing plate 9 should ideally abut against the inner wall of the detection tube 1 to form a guiding function. The connecting block 10 fixes the fixing plate 9 and the movable sleeve 2 together. When the fixing plate 9 moves, it can simultaneously drive the movable sleeve 2 to move. The detection tube 1 is provided with an elongated hole 11. The connecting block 10 moves in the elongated hole 11 and also serves as a guide to prevent the movable rod 8 and the movable sleeve 2 from shaking on the detection tube 1.

[0030] There are multiple fixed plates 9, which are equidistantly fixed on the movable rod 8. Each fixed plate 9 has a connecting block 10 on its outer periphery to further increase the firmness between the fixed plate 9 and the movable sleeve 2.

[0031] The detection component includes multiple pull-rope sensors 36, which are fixed to a fixed plate 9. The multiple pull-rope sensors 36 are distributed equidistantly in a ring on the fixed plate 9. Multiple annularly distributed through holes 12 are opened on the movable sleeve 2. An extension rod 37 is fixed to the bottom of the rotating seat 34, passing through the through hole 12 and extending into the detection tube 1. The pull-rope sensor 36 is located on one side of the extension rod 37, and the pull-rope end of the pull-rope sensor 36 is fixed on the extension rod 37.

[0032] When the sector-shaped detection block 35 drives the rotating seat 34 to rotate, the extension rod 37 and the rotating seat 34 rotate simultaneously around the rotating shaft 32. Under the guidance of the elongated hole 11, the extension rod 37 can only move along the length direction of the elongated hole 11. Therefore, the extension rod 37 can only rotate in a specific direction and will not shake. When the extension rod 37 rotates, the length of the pull rope on the pull rope sensor 36 changes. Based on the change in the length of the pull rope, the rotation angle of the sector-shaped detection block 35 can be accurately calculated.

[0033] The extension rod 37 is located between the two fixed plates 9, and the pull rope sensor 36 is fixed on one of the fixed plates 9. The number of pull rope sensors 36 is the same as the number of extension rods 37.

[0034] The present invention includes a fixed frame (not shown in the figure), one end of the detection tube 1 is fixed on the fixed frame, and a drive mechanism (not shown in the figure) is fixed on the fixed frame. The drive mechanism can be a linear drive device such as a cylinder, an electric push rod, or a screw.

[0035] This invention uses multiple detection elements and multiple sector-shaped detection blocks 35 to detect pipe wall information at different positions of the sector-shaped detection blocks 35, thereby obtaining the inner wall information of the entire circumference of the pipe. Based on the rotation angle of the sector-shaped detection blocks 35, the pipe diameter can be calculated. At the same time, by comparing the rotation angles of multiple sector-shaped detection blocks 35, the straightness of each section of the inner wall of the pipe can be calculated, which facilitates further grinding or processing. The number of sector-shaped detection blocks 35 determines the detection accuracy; the more blocks, the higher the detection accuracy.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention shall fall within the protection scope of the present invention.

Claims

1. A high-precision inner hole straightness detection device, characterized by, The utility model relates to a kind of detection tube (1) and driving mechanism, the detection tube (1) is covered with movable sleeve (2), a plurality of detection units (3) are provided on the movable sleeve (2), a plurality of the detection units (3) are annular equidistant distribution along the movable sleeve (2) outer wall, the detection unit (3) includes mounting seat (31), shaft (32), torsion spring (33), rotating seat (34), sector detection block (35) and detection piece, the mounting seat (31) is fixed on the movable sleeve (2), the shaft (32) is fixed on the mounting seat (31), the torsion spring (33) is covered on the shaft (32), one end is fixed on the shaft (32) and the other end is fixed on the rotating seat (34), the rotating seat (34) is covered on the shaft (32), the rotating seat (34) can rotate along the shaft (32) when being subjected to external force, the sector detection block (35) is fixed on the rotating seat (34) outside, the detection piece is used to detect the rotation degree of the sector detection block (35), and the driving mechanism is used to drive the movable sleeve (2) along the detection tube (1) activity.

2. The high-precision inner hole straightness detection device according to claim 1, characterized in that, A plurality of the sector detection block (35) is annular equidistant distribution, the distance between adjacent sector detection block (35) is 2-3cm.

3. The high-precision inner hole straightness detection device according to claim 1, characterized in that, The movable sleeve (2) is fixedly covered with deburring piece (4), the deburring piece (4) is annular, a plurality of segmentation holes (5) are formed in the deburring piece (4), and the deburring piece (4) is divided into a plurality of sector pieces (6) by the plurality of segmentation holes (5), the middle positions of the plurality of sector pieces (6) are connected into one body, and the outer edge of the deburring piece (4) is provided with deburring brush (7).

4. The high-precision inner hole straightness detection device according to claim 3, characterized in that, The deburring piece (4) is arranged at the front end of the plurality of detection units (3).

5. The high-precision inner hole straightness detection device according to claim 1, characterized in that, The utility model relates to movable rod (8), the fixed sleeve of fixed plate (9) is established on movable rod (8), movable rod (8) and fixed plate (9) are covered in detection tube (1), and the outer periphery of fixed plate (9) is fixed with the protruding connecting block (10);A plurality of long strip holes (11) are formed in the detection tube (1) along its length direction, and the connecting block (10) passes through the long strip hole (11) and is fixedly connected with the inner wall of movable sleeve (2), and the driving mechanism is used to drive movable rod (8) to move in detection tube (1), and movable rod (8) drives movable sleeve (2) to move along the outer wall of detection tube (1).

6. The high-precision inner hole straightness detection device according to claim 5, characterized in that, The fixed plate (9) has a plurality of fixed plate (9) equidistantly fixed on the movable rod (8), and the outer periphery of each fixed plate (9) is provided with connecting block (10).

7. The high-precision inner hole straightness detection device according to claim 6, characterized in that, The detection piece includes a plurality of pull cord sensors (36), the pull cord sensor (36) is fixed on a fixed plate (9), and a plurality of the pull cord sensors (36) are annular equidistant distribution on the fixed plate (9). A plurality of through holes (12) are formed in the movable sleeve (2) in a ring shape, the bottom of the rotating seat (34) is fixed with an extension rod (37), the extension rod (37) passes through the through hole (12) and extends into the detection tube (1), the pull rope sensor (36) is arranged on one side of the extension rod (37), and the pull rope end of the pull rope sensor (36) is fixed on the extension rod (37).

8. The high-precision inner hole straightness detection device according to claim 7, characterized in that, The extension rod (37) is arranged between the two fixing plates (9), the pull rope sensor (36) is fixed on one of the fixing plates (9), and the number of the pull rope sensors (36) is same as that of the extension rods (37).

9. The high-precision inner hole straightness detection device according to claim 1, characterized in that, A fixing frame is arranged, and one end of the detection tube (1) is fixed on the fixing frame.

10. The high-precision inner hole straightness detection device according to claim 9, characterized in that, The driving mechanism is fixed on the fixing frame.

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