Automatic pipe inner diameter measurement device and method

Abstract

This invention discloses an automatic pipe inner diameter measuring device and method, relating to the field of pipe measurement technology. It includes a housing containing multiple measuring mechanisms evenly distributed about the housing's axis. A probe body is fixedly connected to one end of the housing. The probe body contains multiple detection mechanisms, the number of which is equal to the number of measuring mechanisms and corresponding to their distribution. A servo mechanism vents air into the measuring pen, causing the probe rod to extend, while simultaneously monitoring the extension value in real time until a second measuring point contacts the inner wall of a standard cylinder liner. The measured value of the measuring pen in the cylinder liner is recorded. The servo mechanism processes the measured data to determine the inner diameter of the cylinder liner. This method, using multiple measuring pens to measure the inner diameter of the cylinder liner, solves the technical problem of significant errors in pipe inner diameter measurement caused by operator error when using dial indicators or measuring pens.

Description

Technical Field

[0001] This invention belongs to the field of pipelines and relates to measurement technology, specifically an automatic pipe inner diameter measurement device and method. Background Technology

[0002] An automatic pipe diameter measuring device is used to measure the inner diameter of pipes. It typically consists of sensors, a data acquisition unit, and a computer control system. During the measurement process, the sensors usually acquire the pipe's geometric shape information by touching or scanning the inner wall. The acquired data is transmitted to the computer control system via the data acquisition unit, where the system processes and analyzes the data to calculate the pipe's inner diameter.

[0003] In the prior art, tools are generally used to measure the inner diameter of pipes, such as manual measurement with a dial indicator or measurement by inserting a measuring pen into the cylinder liner. This makes the pipe inner diameter inspection time-consuming and labor-intensive. Moreover, due to differences in the visual judgment, manual operation and measurement skills of the staff, there will be large errors, which will affect the measurement results of the pipe inner diameter. Therefore, this application provides an automatic pipe inner diameter measuring device and method to solve the above problems. Summary of the Invention

[0004] The purpose of this application is to provide an automatic pipe inner diameter measurement device and method, which solves the problem that the measurement of pipe inner diameter by dial indicator or measuring pen will have a large error due to the operation of the operator.

[0005] To achieve the above objectives, this application provides an automatic pipe inner diameter measuring device and method, including a housing, inside which are arranged multiple measuring mechanisms evenly distributed about the axis of the housing. A probe body is fixedly connected to one end of the housing. Multiple detection mechanisms are arranged inside the probe body, the number of which is equal to the number of measuring mechanisms and corresponding to the measuring mechanisms. Each measuring mechanism includes a servo mechanism and a measuring pen fixedly connected to each other. The servo mechanism is fixedly connected to the inner wall of the housing, and the measuring pen is fixedly connected to the housing. A measuring rod is provided at the end of the measuring pen away from the servo mechanism. Each detection mechanism includes a mounting base fixedly connected to the inner wall of the probe body. A bend is rotatably connected to the middle of the mounting base. The bend is L-shaped, and the distance between its two ends is equal. A first measuring point and a second measuring point are fixedly installed at the two ends of the bend, respectively. The first measuring point abuts against the measuring rod. A measuring hole is provided on the side wall of the probe body for the second measuring point to rotate outwards.

[0006] Preferably, a spring is fixedly installed between the mounting base and the bend.

[0007] Preferably, an end cap is threadedly fixed to the end of the probe body away from the housing, an adjustment cover is movably connected to the middle of the end cap, an inner extension ring is provided at the end of the adjustment cover facing the probe body, and a cleaning strip is fixedly installed on the inner sidewall of the inner extension ring.

[0008] Preferably, the inner extension ring has a ring-shaped wave.

[0009] Preferably, an elastic ring is provided between the end cap and the adjusting cap.

[0010] Preferably, the elastic ring is engaged in the grooves formed by the end cap and the adjusting cap.

[0011] Preferably, a top block is fixedly connected to the end of the adjustment cover away from the probe body.

[0012] Preferably, a bearing is provided between the bend and the mounting base.

[0013] Preferably, a second elastic sheet is fixedly connected between the inner ring and the cleaning strip, mounting blocks are fixedly connected to both sides of the mounting base, a first elastic sheet is fixedly installed on the inner sidewall of the mounting base at both ends, an oil reservoir for storing lubricating oil is fixedly installed inside the bearing, one end of the first elastic sheet is tightly attached to the sidewall of the oil reservoir, and an oil outlet pipe facing the bearing is fixedly connected to the sidewall of the oil reservoir.

[0014] Preferably, the measurement method comprises the following steps:

[0015] Preferably, S-shell: The standard gauge with an inner diameter of a is tested by a measuring mechanism and measuring device until the second measuring point is close to the inner wall of the standard gauge. The value of each measuring pen is recorded and denoted as: b-shell, b-probe body, b-end cap, b-adjusting cap.

[0016] Preferably, the measurement method comprises the following steps:

[0017] S1: Test the standard gauge with an inner diameter of a using a measuring mechanism and measuring device until the second measuring point is close to the inner wall of the standard gauge. Record the values ​​of each measuring pen as: b1, b2, b3, b4.

[0018] S2: The inner diameter of the cylinder liner under test is detected by measuring mechanism and measuring device until the second measuring point is close to the inner wall of the cylinder liner under test, and the value of each measuring pen is recorded as: c1, c2, c3, c4.

[0019] S3: The servo mechanism calculates the inner diameter of the cylinder liner using the following formula:

[0020] d=a+(c1+c2+c3+c4-b1-b2-b3-b4) / 2

[0021] d1 = a + (c1 + c3 - b1 - b3)

[0022] d2 = a + (c2 + c4 - b2 - b4)

[0023] Where d represents the average inner diameter of the cylinder liner to be tested; d1 represents the inner diameter of the cylinder liner to be tested in the X direction; and d2 represents the inner diameter of the cylinder liner to be tested in the Y direction.

[0024] Compared with the prior art, the beneficial effects of the present invention are:

[0025] By setting up a measuring mechanism and a detection mechanism, the servo mechanism vents air into the probe, causing the probe rod to extend. At the same time, the extension value of the probe is monitored in real time. After the probe rod extends, it squeezes the first measuring point, causing the bend to rotate. After the bend rotates, it drives the second measuring point to rotate outward through the notch in the probe body until the second measuring point touches the inner wall of the standard cylinder liner. The value of the probe in the cylinder liner under test is recorded. The servo mechanism processes the measured data and finally obtains the inner diameter of the cylinder liner under test. Multiple sets of probes are used to detect the inner diameter of the cylinder liner, reducing the number of manual operation steps and reducing the error when detecting the inner diameter of the cylinder liner.

[0026] By setting an end cap, an adjusting cap, and a cleaning strip, pressing the adjusting cap and rotating it allows the cleaning strip to clean the surface debris of the second measuring point due to the pressing of the adjusting cap. This prevents debris from sticking to the surface of the second measuring point during repeated cylinder liner measurements, thus affecting the measurement results. At the same time, the inner extension ring blocks the notch in the probe body, preventing debris from falling in through the notch during transport.

[0027] By setting up a second elastic plate, a first elastic plate, an oil reservoir, and an oil outlet pipe, the cleaning strip cleans the surface debris of the second measuring point. At the same time, the second elastic plate arches up, causing the cleaning strip to squeeze the cleaned second measuring point. After the second measuring point is compressed, the other end of the bend applies pressure to the end of the first elastic plate. At this time, the first elastic plate is compressed, which squeezes the oil reservoir, thereby causing the lubricating oil in the oil reservoir to fall into the bearing through the oil outlet pipe, thus lubricating the bearing, effectively reducing bearing wear and damage, and maintaining good operating performance. Attached Figure Description

[0028] To more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings used in the prior art and embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0029] Figure 1 This is a structural diagram of the automatic pipe inner diameter measuring device and method of the present invention;

[0030] Figure 2 This is a cross-sectional structural diagram of the casing of the present invention;

[0031] Figure 3 This is a partial cross-sectional view of the probe body of the present invention;

[0032] Figure 4 for Figure 3 Enlarged structural diagram at point A in the middle;

[0033] Figure 5 This is a partial cross-sectional view of the probe body, end cap, and adjustment cap of the present invention in combination;

[0034] Figure 6 This is a partial cross-sectional view of the mounting base of the present invention;

[0035] Figure 7 This is a cross-sectional view of the end cap and adjustment cap of the present invention.

[0036] The labels in the diagram represent: 1. Housing; 2. Probe body; 3. End cap; 4. Adjustment cap; 5. Top block; 6. Elastic ring; 7. Servo mechanism; 8. Probe; 9. Mounting base; 10. First measuring point; 11. Bend; 12. Mounting block; 13. Second measuring point; 14. Inner ring; 15. Probe rod; 16. Spring; 17. First elastic plate; 18. Oil reservoir; 19. Oil outlet pipe; 20. Bearing; 21. Second elastic plate; 22. Cleaning strip. Detailed Implementation

[0037] To make the objectives, technical solutions, and advantages of the embodiments of this application clearer, the technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application.

[0038] Please refer to the details. Figures 1-5As shown, the automatic pipe inner diameter measuring device and method includes a housing 1, inside which multiple measuring mechanisms are arranged, evenly distributed about the axis of the housing 1. A probe body 2 is fixedly connected to one end of the housing 1. Multiple detection mechanisms are arranged inside the probe body 2, the number of which is equal to the number of measuring mechanisms and corresponding to the measuring mechanisms. Preferably, there are four measuring mechanisms, each including a servo mechanism 7 and a measuring pen 8 fixedly connected to each other. The servo mechanism 7 is fixedly connected to the inner wall of the housing 1. Next, the measuring pen 8 is fixedly connected to the housing 1, and a measuring rod 15 is provided at the end of the measuring pen 8 away from the corresponding servo mechanism 7; the detection mechanism includes a mounting base 9 fixedly connected to the inner side wall of the probe body 2, and a bend 11 is rotatably connected to the middle of the mounting base 9. The bend 11 is L-shaped and the distance between the two ends is equal. The first measuring point 10 and the second measuring point 13 are fixedly installed at the two ends of the bend 11, respectively. The first measuring point 10 abuts against the measuring rod 15. The side wall of the probe body 2 is provided with a measuring hole for the second measuring point 13 to rotate outward. The entire measurement process is as follows:

[0039] The operator places the entire measuring device into the cylinder liner of the standard gauge. The inner diameter of the standard gauge is known as 'a'. The servo mechanism 7 is activated, which vents air into the probe 8, causing the probe rod 15 to extend. Simultaneously, the extension value of the probe 8 is monitored in real time. After the probe rod 15 extends, it presses against the first measuring point 10, causing the bend 11 to rotate. The rotation of the bend 11 then drives the second measuring point 13 to rotate outward through the notch in the probe body 2 until the second measuring point 13 touches the inner wall of the cylinder liner of the standard gauge. At this point, the extension distance of each probe 8 is measured and recorded as b1 and b2. Next, the cylinder liner to be tested is measured again, and the above operation is repeated. The distance extended by the measuring pen 8 is recorded again, and the values ​​are recorded as: c1, c2, c3, c4. Where b1, b3, c1, and c3 are the inner diameters in the X direction of the standard gauge and the cylinder liner to be tested, respectively, and b2, b4, c2, and c4 are the inner diameters in the Y direction of the standard gauge and the cylinder liner to be tested, respectively. The X and Y directions are perpendicular to each other. Finally, the servo mechanism 7 processes and calculates the values ​​to obtain the final inner diameter of the cylinder liner to be tested. The specific processing and calculation process is as follows:

[0040] d=a+(c1+c2+c3+c4-b1-b2-b3-b4) / 2

[0041] d1 = a + (c1 + c3 - b1 - b3)

[0042] d2 = a + (c2 + c4 - b2 - b4)

[0043] d represents the average inner diameter of the cylinder liner being tested;

[0044] d1 represents the inner diameter of the cylinder liner under test in the X direction;

[0045] d2 represents the inner diameter of the cylinder liner under test in the Y direction.

[0046] As one implementation method in this embodiment, the inner diameter of the cylinder liner to be tested is measured by comparison through the above operation, and multiple sets of measuring pens 8 are used to detect the inner diameter of the cylinder liner at the same time, reducing the steps of manual operation and reducing the error when detecting the inner diameter of the cylinder liner.

[0047] As one implementation method in this embodiment, such as Figure 3 and Figure 4 As shown, a spring 16 is fixedly installed between the mounting base 9 and the bend 11. After the inner diameter of the cylinder liner to be measured is completed, the servo mechanism 7 cuts off the air supply and the measuring rod 15 retracts. The spring 16 pulls the bend 11 to reset until the second measuring point 13 moves into the inside of the probe body 2, thus completing the reset of the bend 11 and the second measuring point 13. Then the entire measuring device can be taken out outward.

[0048] As one implementation method in this embodiment, such as Figure 1 , Figure 2 , Figure 5 and Figure 7As shown, an end cap 3 is threadedly fixed to the end of the probe body 2 away from the housing 1. An adjusting cover 4 is movably connected to the middle of the end cap 3. An inner extension ring 14 with an annular wave pattern is provided on the end of the adjusting cover 4 facing the probe body 2. A cleaning strip 22 is fixedly installed on the inner side wall of the inner extension ring 14. In the initial state, the inner extension ring 14 covers the notch of the probe body 2 and does not contact the second measuring point 13. At the same time, the cleaning strip 22 does not contact the second measuring point 13. At this time, when the entire measuring device is carried, it is to prevent foreign objects from falling into the notch of the probe body 2. When it is necessary to measure the inner diameter of the cylinder liner, the operator rotates the adjusting cover 4 and aligns the empty part of the adjusting cover 4 with the notch of the probe body 2. At this time, the bend 11 and the second measuring point 13 can extend outward. When it is necessary to test the inner diameter of the cylinder liner, the operator presses the adjusting cover 4 and rotates the adjusting cover 4. During the process, the inner extension ring 14 rotates about the axis of the probe body 2, and the cleaning strip 22 rotates due to the wave pattern. Pressing the adjusting cover 4 can clean the surface debris of the second measuring point 13, preventing debris from sticking to the surface of the second measuring point 13 during repeated cylinder liner measurements and affecting the measurement results. An elastic ring 6 is provided between the end cover 3 and the adjusting cover 4. The elastic ring 6 is inserted into the groove opened in the end cover 3 and the adjusting cover 4 to drive the adjusting cover 4 to extend outward. At this time, the rotation of the cleaning strip 22 will not clean the second measuring point 13 or interfere with the second measuring point 13. The end of the adjusting cover 4 away from the probe body 2 is fixedly connected to the top block 5. The top block 5 makes it convenient for the operator to press and drive the adjusting cover 4 to rotate. When the operator holds the top block 5 and presses and drives the adjusting cover 4 to rotate, the cleaning strip 22 cleans the debris stuck to the surface of the second measuring point 13 and drops the cleaned debris into the inner wall of the probe body 2. At the same time, the wavy second measuring point 13 moves the debris. The inner side wall of the adjusting cover 4 is inclined so that the debris falls out through the notch of the probe body 2 in time.

[0049] As one implementation method in this embodiment, such as Figures 3-7As shown, a bearing 20 is provided between the bend 11 and the mounting base 9. The bearing 20 is used to reduce the friction between the bend 11 and the mounting base 9 and reduce wear. A second elastic plate 21 is fixedly connected between the inner extension ring 14 and the cleaning strip 22. Mounting blocks 12 are fixedly connected to both sides of the mounting base 9. A first elastic plate 17 is fixedly installed on the inner side wall of the mounting base 9 at both ends. An oil reservoir 18 for storing lubricating oil is fixedly installed inside the bearing 20. One end of the first elastic plate 17 is tightly attached to the side wall of the oil reservoir 18. An oil outlet pipe 19 facing the corresponding bearing 20 is fixedly connected to the side wall of the oil reservoir 18. The side wall of the mounting block 12 is sealed (not shown in the figure). When the end of the first elastic plate 17 is squeezed, the other end of the first elastic plate 17 squeezes the oil reservoir 18, causing the lubricating oil in the oil reservoir 18 to fall into the bearing 20. This adds lubricating oil to the bearing 20, reducing wear. In the initial state, the spring 16 drives one end of the bend 11 to press against the end of the first elastic plate 17. At this time, the force on the first elastic plate 17 is insufficient to compress the oil reservoir 18. When the user presses and rotates the adjusting cover 4, the cleaning strip 22 cleans the surface debris of the second measuring point 13. At the same time, the second elastic plate 21 arches up, driving the cleaning strip 22 to compress the cleaned second measuring point 13. After the second measuring point 13 is compressed, it drives the other end of the bend 11 to apply pressure to the end of the first elastic plate 17. At this time, the first elastic plate 17 can compress the oil reservoir 18, thereby driving the lubricating oil in the oil reservoir 18 to fall into the bearing 20 through the oil outlet pipe 19, thus lubricating the bearing 20, effectively reducing the wear and damage of the bearing 20, and maintaining good operating performance.

[0050] The working principle of this invention is as follows: In use, the operator first places the probe body 2 of the entire measuring device into the cylinder liner of a standard gauge. Air is then circulated into the probe 8 via the servo mechanism 7, causing the probe rod 15 to extend. The extended probe rod 15 presses against the first measuring point 10, causing the bend 11 to rotate. The rotation of the bend 11 then drives the second measuring point 13 to rotate outwards through the notch in the probe body 2 until the second measuring point 13 contacts the inner wall of the cylinder liner of the standard gauge. A set of reference values ​​for the probe 8 is obtained by measuring the cylinder liner of the standard gauge. After the second measuring point 13 is reset, the probe body 2 is placed back into the cylinder liner to be measured. This process is repeated, and the values ​​of the probe 8 in the cylinder liner to be measured are recorded. The servo mechanism 7 processes the measured data to finally determine the inner diameter of the cylinder liner to be measured. Multiple sets of probes 8 are used to detect the inner diameter of the cylinder liner, reducing manual operation steps and lowering the error in detecting the inner diameter of the cylinder liner.

[0051] After multiple measurements are performed using the measuring device, to ensure the accuracy of subsequent measurements, it is necessary to remove the debris adhering to the end of the second measuring point 13. Initially, the spring 16 pulls the second measuring point 13 inside the probe body 2. To better allow lubricating oil to drip into the bearing 20, the operator places the probe body 2 vertically downwards. The operator holds the top block 5, presses it down, and rotates the adjusting cover 4. The inner ring 14 rotates about the axis of the probe body 2. The inner ring 14 drives the cleaning strip 22 to rotate and clean the debris on the surface of the second measuring point 13, preventing debris from adhering to the surface of the second measuring point 13 during repeated cylinder liner measurements and affecting the measurement results. Simultaneously, the second elastic plate 21 arches, causing the cleaning strip 22 to squeeze the cleaned second measuring point 13, increasing the cleaning effect. At the same time, the second measuring point 13... After being pressed, the other end of the bend 11 is pressed against the end of the first elastic plate 17. At this time, the first elastic plate 17 is pressed enough to squeeze the oil storage bladder 18 to release oil, thereby driving the lubricating oil in the oil storage bladder 18 to fall into the bearing 20 through the oil outlet pipe 19, which lubricates the bearing 20, effectively reducing the wear and damage of the bearing 20, and maintaining good operating performance. After the cleaning strip 22 cleans the surface of the second measuring point 13, and lubricating oil is added to the bearing 20, the operator no longer presses the adjusting cover 4. The elastic ring 6 drives the adjusting cover 4 to extend outward. The operator lays the measuring device flat and continues to rotate the adjusting cover 4, so that the inner extension ring 14 moves the debris in the side wall of the probe body 2, so that the debris in the probe body 2 will gradually fall out through the notch of the probe body 2.

[0052] The above description of the disclosed embodiments enables those skilled in the art to make or use this application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of this application. Therefore, this application is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. An automatic pipe inner diameter measuring device, characterized in that, include: A housing (1) is provided inside which multiple measuring mechanisms are evenly distributed about the axis of the housing (1). A probe body (2) is fixedly connected to one end of the housing (1). Multiple detection mechanisms are provided inside the probe body (2). The number of detection mechanisms is equal to the number of measuring mechanisms and they are distributed correspondingly to the measuring mechanisms. Each measuring mechanism includes a servo mechanism (7) and a measuring pen (8) fixedly connected to each other. The servo mechanism (7) is fixedly connected to the inner wall of the housing (1), and the measuring pen (8) is fixedly connected to the housing (1). Next, a measuring rod (15) is provided at the end of the measuring pen (8) away from the corresponding servo mechanism (7); the detection mechanism includes a mounting base (9) fixedly connected to the inner side wall of the probe body (2), and a bend (11) is rotatably connected in the middle of the mounting base (9). The bend (11) is L-shaped and the distance between the two ends is equal. A first measuring point (10) and a second measuring point (13) are fixedly installed at the two ends of the bend (11). The first measuring point (10) abuts against the measuring rod (15). The side wall of the probe body (2) is provided with a measuring hole for the second measuring point (13) to rotate outward. The probe body (2) is threaded with an end cap (3) at one end away from the housing (1). An adjustment cap (4) is movably connected to the middle of the end cap (3). An inner extension ring (14) is provided at one end of the adjustment cap (4) facing the probe body (2). A cleaning strip (22) is fixedly installed on the inner sidewall of the inner extension ring (14). The inner ring (14) has a ring-shaped wave.

2. The automatic pipe inner diameter measuring device as described in claim 1, characterized in that, A spring (16) is fixedly installed between the mounting base (9) and the bend (11).

3. The automatic pipe inner diameter measuring device as described in claim 1, characterized in that, An elastic ring (6) is provided between the end cap (3) and the adjusting cap (4).

4. The automatic pipe inner diameter measuring device as described in claim 3, characterized in that, The elastic ring (6) is inserted into the grooves opened in the end cap (3) and the adjusting cap (4).

5. The automatic pipe inner diameter measuring device as described in claim 1, 3, or 4, characterized in that, The adjusting cover (4) is fixedly connected to a top block (5) at the end away from the probe body (2).

6. The automatic pipe inner diameter measuring device as described in claim 1, characterized in that, A bearing (20) is provided between the bend (11) and the mounting base (9).

7. The automatic pipe inner diameter measuring device as described in claim 6, characterized in that, A second elastic sheet (21) is fixedly connected between the inner ring (14) and the cleaning strip (22). Mounting blocks (12) are fixedly connected to both sides of the mounting base (9). A first elastic sheet (17) is fixedly installed on the inner side wall of the mounting base (9) at both ends. An oil storage bladder (18) for storing lubricating oil is fixedly installed inside the bearing (20). One end of the first elastic sheet (17) is tightly attached to the side wall of the oil storage bladder (18). An oil outlet pipe (19) facing the bearing (20) is fixedly connected to the side wall of the oil storage bladder (18).

8. A measurement method for the automatic pipe inner diameter measuring device as described in claim 1, characterized in that, The measurement method consists of the following steps: S1: The standard gauge with an inner diameter of a is tested by measuring mechanism and measuring device until the second measuring point (13) is close to the inner wall of the standard gauge. The values ​​of each measuring pen (8) are recorded and recorded as: b1, b2, b3, b4. S2: The inner diameter of the cylinder liner to be tested is detected by measuring mechanism and measuring device until the second measuring point (13) is close to the inner wall of the cylinder liner to be tested, and the value of each measuring pen (8) is recorded and recorded as: c1, c2, c3, c4. S3: The servo mechanism (7) calculates the inner diameter of the cylinder liner using the following formula: d=a+(c1+c2+c3+c4-b1-b2-b3-b4) / 2 d1 = a + (c1 + c3 - b1 - b3) d² = a + (c² + c⁴ - b² - b⁴) Where d represents the average inner diameter of the cylinder liner to be tested; d1 represents the inner diameter of the cylinder liner to be tested in the X direction; and d2 represents the inner diameter of the cylinder liner to be tested in the Y direction.

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